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Merge branches 'ib-mfd-gpio-input-pwm-6.17', 'ib-mfd-gpio-power-soc-6.17' and 'ib-mfd-misc-pinctrl-6.17' into ibs-for-mfd-merged

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This commit is contained in:
Lee Jones
2025-07-24 11:26:13 +01:00
parent 45ee66c37f 819687eb28 d90171bc2e
commit f3e332d963
22 changed files with 1711 additions and 22 deletions
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29
Documentation/devicetree/bindings/gpio/apple,smc-gpio.yaml Normal file
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@@ -0,0 +1,29 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/gpio/apple,smc-gpio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Apple Mac System Management Controller GPIO
maintainers:
- Sven Peter <sven@kernel.org>
description:
Apple Mac System Management Controller GPIO block.
properties:
compatible:
const: apple,smc-gpio
gpio-controller: true
'#gpio-cells':
const: 2
required:
- compatible
- gpio-controller
- '#gpio-cells'
additionalProperties: false

79
Documentation/devicetree/bindings/mfd/apple,smc.yaml Normal file
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@@ -0,0 +1,79 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/apple,smc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Apple Mac System Management Controller
maintainers:
- Sven Peter <sven@kernel.org>
description:
Apple Mac System Management Controller implements various functions
such as GPIO, RTC, power, reboot.
properties:
compatible:
items:
- enum:
- apple,t6000-smc
- apple,t8103-smc
- apple,t8112-smc
- const: apple,smc
reg:
items:
- description: SMC area
- description: SRAM area
reg-names:
items:
- const: smc
- const: sram
mboxes:
maxItems: 1
gpio:
$ref: /schemas/gpio/apple,smc-gpio.yaml
reboot:
$ref: /schemas/power/reset/apple,smc-reboot.yaml
additionalProperties: false
required:
- compatible
- reg
- reg-names
- mboxes
examples:
- |
soc {
#address-cells = <2>;
#size-cells = <2>;
smc@23e400000 {
compatible = "apple,t8103-smc", "apple,smc";
reg = <0x2 0x3e400000 0x0 0x4000>,
<0x2 0x3fe00000 0x0 0x100000>;
reg-names = "smc", "sram";
mboxes = <&smc_mbox>;
smc_gpio: gpio {
compatible = "apple,smc-gpio";
gpio-controller;
#gpio-cells = <2>;
};
reboot {
compatible = "apple,smc-reboot";
nvmem-cells = <&shutdown_flag>, <&boot_stage>,
<&boot_error_count>, <&panic_count>;
nvmem-cell-names = "shutdown_flag", "boot_stage",
"boot_error_count", "panic_count";
};
};
};

1
Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
View File

@@ -22,6 +22,7 @@ properties:
- ti,tps6593-q1
- ti,tps6594-q1
- ti,tps65224-q1
- ti,tps652g1
reg:
description: I2C slave address or SPI chip select number.

40
Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml Normal file
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@@ -0,0 +1,40 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/power/reset/apple,smc-reboot.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Apple SMC Reboot Controller
description:
The Apple System Management Controller (SMC) provides reboot functionality
on Apple Silicon SoCs. It uses NVMEM cells to store and track various
system state information related to boot, shutdown, and panic events.
maintainers:
- Sven Peter <sven@kernel.org>
properties:
compatible:
const: apple,smc-reboot
nvmem-cells:
items:
- description: Flag indicating shutdown (as opposed to reboot)
- description: Stage at which the boot process stopped (0x30 for normal boot)
- description: Counter for boot errors
- description: Counter for system panics
nvmem-cell-names:
items:
- const: shutdown_flag
- const: boot_stage
- const: boot_error_count
- const: panic_count
required:
- compatible
- nvmem-cells
- nvmem-cell-names
additionalProperties: false

7
MAINTAINERS
View File

@@ -2332,6 +2332,7 @@ F: Documentation/devicetree/bindings/arm/apple/*
F: Documentation/devicetree/bindings/clock/apple,nco.yaml
F: Documentation/devicetree/bindings/cpufreq/apple,cluster-cpufreq.yaml
F: Documentation/devicetree/bindings/dma/apple,admac.yaml
F: Documentation/devicetree/bindings/gpio/apple,smc-gpio.yaml
F: Documentation/devicetree/bindings/i2c/apple,i2c.yaml
F: Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml
F: Documentation/devicetree/bindings/interrupt-controller/apple,*
@@ -2339,6 +2340,7 @@ F: Documentation/devicetree/bindings/iommu/apple,dart.yaml
F: Documentation/devicetree/bindings/iommu/apple,sart.yaml
F: Documentation/devicetree/bindings/leds/backlight/apple,dwi-bl.yaml
F: Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml
F: Documentation/devicetree/bindings/mfd/apple,smc.yaml
F: Documentation/devicetree/bindings/net/bluetooth/brcm,bcm4377-bluetooth.yaml
F: Documentation/devicetree/bindings/nvme/apple,nvme-ans.yaml
F: Documentation/devicetree/bindings/nvmem/apple,efuses.yaml
@@ -2346,6 +2348,7 @@ F: Documentation/devicetree/bindings/nvmem/apple,spmi-nvmem.yaml
F: Documentation/devicetree/bindings/pci/apple,pcie.yaml
F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
F: Documentation/devicetree/bindings/power/apple*
F: Documentation/devicetree/bindings/power/reset/apple,smc-reboot.yaml
F: Documentation/devicetree/bindings/pwm/apple,s5l-fpwm.yaml
F: Documentation/devicetree/bindings/spi/apple,spi.yaml
F: Documentation/devicetree/bindings/spmi/apple,spmi.yaml
@@ -2355,6 +2358,7 @@ F: drivers/bluetooth/hci_bcm4377.c
F: drivers/clk/clk-apple-nco.c
F: drivers/cpufreq/apple-soc-cpufreq.c
F: drivers/dma/apple-admac.c
F: drivers/gpio/gpio-macsmc.c
F: drivers/pmdomain/apple/
F: drivers/i2c/busses/i2c-pasemi-core.c
F: drivers/i2c/busses/i2c-pasemi-platform.c
@@ -2362,10 +2366,12 @@ F: drivers/input/touchscreen/apple_z2.c
F: drivers/iommu/apple-dart.c
F: drivers/iommu/io-pgtable-dart.c
F: drivers/irqchip/irq-apple-aic.c
F: drivers/mfd/macsmc.c
F: drivers/nvme/host/apple.c
F: drivers/nvmem/apple-efuses.c
F: drivers/nvmem/apple-spmi-nvmem.c
F: drivers/pinctrl/pinctrl-apple-gpio.c
F: drivers/power/reset/macsmc-reboot.c
F: drivers/pwm/pwm-apple.c
F: drivers/soc/apple/*
F: drivers/spi/spi-apple.c
@@ -2374,6 +2380,7 @@ F: drivers/video/backlight/apple_dwi_bl.c
F: drivers/watchdog/apple_wdt.c
F: include/dt-bindings/interrupt-controller/apple-aic.h
F: include/dt-bindings/pinctrl/apple.h
F: include/linux/mfd/macsmc.h
F: include/linux/soc/apple/*
F: include/uapi/drm/asahi_drm.h

10
drivers/gpio/Kconfig
View File

@@ -1465,6 +1465,16 @@ config GPIO_LP87565
This driver can also be built as a module. If so, the module will be
called gpio-lp87565.
config GPIO_MACSMC
tristate "Apple Mac SMC GPIO"
depends on MFD_MACSMC
help
Support for GPIOs controlled by the SMC microcontroller on Apple Mac
systems.
This driver can also be built as a module. If so, the module will be
called gpio-macsmc.
config GPIO_MADERA
tristate "Cirrus Logic Madera class codecs"
depends on PINCTRL_MADERA

1
drivers/gpio/Makefile
View File

@@ -99,6 +99,7 @@ obj-$(CONFIG_GPIO_LP873X) += gpio-lp873x.o
obj-$(CONFIG_GPIO_LP87565) += gpio-lp87565.o
obj-$(CONFIG_GPIO_LPC18XX) += gpio-lpc18xx.o
obj-$(CONFIG_GPIO_LPC32XX) += gpio-lpc32xx.o
obj-$(CONFIG_GPIO_MACSMC) += gpio-macsmc.o
obj-$(CONFIG_GPIO_MADERA) += gpio-madera.o
obj-$(CONFIG_GPIO_MAX3191X) += gpio-max3191x.o
obj-$(CONFIG_GPIO_MAX7300) += gpio-max7300.o

292
drivers/gpio/gpio-macsmc.c Normal file
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@@ -0,0 +1,292 @@
// SPDX-License-Identifier: GPL-2.0-only OR MIT
/*
* Apple SMC GPIO driver
* Copyright The Asahi Linux Contributors
*
* This driver implements basic SMC PMU GPIO support that can read inputs
* and write outputs. Mode changes and IRQ config are not yet implemented.
*/
#include <linux/bitmap.h>
#include <linux/device.h>
#include <linux/gpio/driver.h>
#include <linux/mfd/core.h>
#include <linux/mfd/macsmc.h>
#define MAX_GPIO 64
/*
* Commands 0-6 are, presumably, the intended API.
* Command 0xff lets you get/set the pin configuration in detail directly,
* but the bit meanings seem not to be stable between devices/PMU hardware
* versions.
*
* We're going to try to make do with the low commands for now.
* We don't implement pin mode changes at this time.
*/
#define CMD_ACTION (0 << 24)
#define CMD_OUTPUT (1 << 24)
#define CMD_INPUT (2 << 24)
#define CMD_PINMODE (3 << 24)
#define CMD_IRQ_ENABLE (4 << 24)
#define CMD_IRQ_ACK (5 << 24)
#define CMD_IRQ_MODE (6 << 24)
#define CMD_CONFIG (0xff << 24)
#define MODE_INPUT 0
#define MODE_OUTPUT 1
#define MODE_VALUE_0 0
#define MODE_VALUE_1 2
#define IRQ_MODE_HIGH 0
#define IRQ_MODE_LOW 1
#define IRQ_MODE_RISING 2
#define IRQ_MODE_FALLING 3
#define IRQ_MODE_BOTH 4
#define CONFIG_MASK GENMASK(23, 16)
#define CONFIG_VAL GENMASK(7, 0)
#define CONFIG_OUTMODE GENMASK(7, 6)
#define CONFIG_IRQMODE GENMASK(5, 3)
#define CONFIG_PULLDOWN BIT(2)
#define CONFIG_PULLUP BIT(1)
#define CONFIG_OUTVAL BIT(0)
/*
* Output modes seem to differ depending on the PMU in use... ?
* j274 / M1 (Sera PMU):
* 0 = input
* 1 = output
* 2 = open drain
* 3 = disable
* j314 / M1Pro (Maverick PMU):
* 0 = input
* 1 = open drain
* 2 = output
* 3 = ?
*/
struct macsmc_gpio {
struct device *dev;
struct apple_smc *smc;
struct gpio_chip gc;
int first_index;
};
static int macsmc_gpio_nr(smc_key key)
{
int low = hex_to_bin(key & 0xff);
int high = hex_to_bin((key >> 8) & 0xff);
if (low < 0 || high < 0)
return -1;
return low | (high << 4);
}
static int macsmc_gpio_key(unsigned int offset)
{
return _SMC_KEY("gP\0\0") | hex_asc_hi(offset) << 8 | hex_asc_lo(offset);
}
static int macsmc_gpio_find_first_gpio_index(struct macsmc_gpio *smcgp)
{
struct apple_smc *smc = smcgp->smc;
smc_key key = macsmc_gpio_key(0);
smc_key first_key, last_key;
int start, count, ret;
/* Return early if the key is out of bounds */
ret = apple_smc_get_key_by_index(smc, 0, &first_key);
if (ret)
return ret;
if (key <= first_key)
return -ENODEV;
ret = apple_smc_get_key_by_index(smc, smc->key_count - 1, &last_key);
if (ret)
return ret;
if (key > last_key)
return -ENODEV;
/* Binary search to find index of first SMC key bigger or equal to key */
start = 0;
count = smc->key_count;
while (count > 1) {
smc_key pkey;
int pivot = start + ((count - 1) >> 1);
ret = apple_smc_get_key_by_index(smc, pivot, &pkey);
if (ret < 0)
return ret;
if (pkey == key)
return pivot;
pivot++;
if (pkey < key) {
count -= pivot - start;
start = pivot;
} else {
count = pivot - start;
}
}
return start;
}
static int macsmc_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
{
struct macsmc_gpio *smcgp = gpiochip_get_data(gc);
smc_key key = macsmc_gpio_key(offset);
u32 val;
int ret;
/* First try reading the explicit pin mode register */
ret = apple_smc_rw_u32(smcgp->smc, key, CMD_PINMODE, &val);
if (!ret)
return (val & MODE_OUTPUT) ? GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN;
/*
* Less common IRQ configs cause CMD_PINMODE to fail, and so does open drain mode.
* Fall back to reading IRQ mode, which will only succeed for inputs.
*/
ret = apple_smc_rw_u32(smcgp->smc, key, CMD_IRQ_MODE, &val);
return ret ? GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN;
}
static int macsmc_gpio_get(struct gpio_chip *gc, unsigned int offset)
{
struct macsmc_gpio *smcgp = gpiochip_get_data(gc);
smc_key key = macsmc_gpio_key(offset);
u32 cmd, val;
int ret;
ret = macsmc_gpio_get_direction(gc, offset);
if (ret < 0)
return ret;
if (ret == GPIO_LINE_DIRECTION_OUT)
cmd = CMD_OUTPUT;
else
cmd = CMD_INPUT;
ret = apple_smc_rw_u32(smcgp->smc, key, cmd, &val);
if (ret < 0)
return ret;
return val ? 1 : 0;
}
static int macsmc_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
{
struct macsmc_gpio *smcgp = gpiochip_get_data(gc);
smc_key key = macsmc_gpio_key(offset);
int ret;
value |= CMD_OUTPUT;
ret = apple_smc_write_u32(smcgp->smc, key, CMD_OUTPUT | value);
if (ret < 0)
dev_err(smcgp->dev, "GPIO set failed %p4ch = 0x%x\n",
&key, value);
return ret;
}
static int macsmc_gpio_init_valid_mask(struct gpio_chip *gc,
unsigned long *valid_mask, unsigned int ngpios)
{
struct macsmc_gpio *smcgp = gpiochip_get_data(gc);
int count;
int i;
count = min(smcgp->smc->key_count, MAX_GPIO);
bitmap_zero(valid_mask, ngpios);
for (i = 0; i < count; i++) {
int ret, gpio_nr;
smc_key key;
ret = apple_smc_get_key_by_index(smcgp->smc, smcgp->first_index + i, &key);
if (ret < 0)
return ret;
if (key > SMC_KEY(gPff))
break;
gpio_nr = macsmc_gpio_nr(key);
if (gpio_nr < 0 || gpio_nr > MAX_GPIO) {
dev_err(smcgp->dev, "Bad GPIO key %p4ch\n", &key);
continue;
}
set_bit(gpio_nr, valid_mask);
}
return 0;
}
static int macsmc_gpio_probe(struct platform_device *pdev)
{
struct macsmc_gpio *smcgp;
struct apple_smc *smc = dev_get_drvdata(pdev->dev.parent);
smc_key key;
int ret;
smcgp = devm_kzalloc(&pdev->dev, sizeof(*smcgp), GFP_KERNEL);
if (!smcgp)
return -ENOMEM;
smcgp->dev = &pdev->dev;
smcgp->smc = smc;
smcgp->first_index = macsmc_gpio_find_first_gpio_index(smcgp);
if (smcgp->first_index < 0)
return smcgp->first_index;
ret = apple_smc_get_key_by_index(smc, smcgp->first_index, &key);
if (ret < 0)
return ret;
if (key > macsmc_gpio_key(MAX_GPIO - 1))
return -ENODEV;
dev_info(smcgp->dev, "First GPIO key: %p4ch\n", &key);
smcgp->gc.label = "macsmc-pmu-gpio";
smcgp->gc.owner = THIS_MODULE;
smcgp->gc.get = macsmc_gpio_get;
smcgp->gc.set_rv = macsmc_gpio_set;
smcgp->gc.get_direction = macsmc_gpio_get_direction;
smcgp->gc.init_valid_mask = macsmc_gpio_init_valid_mask;
smcgp->gc.can_sleep = true;
smcgp->gc.ngpio = MAX_GPIO;
smcgp->gc.base = -1;
smcgp->gc.parent = &pdev->dev;
return devm_gpiochip_add_data(&pdev->dev, &smcgp->gc, smcgp);
}
static const struct of_device_id macsmc_gpio_of_table[] = {
{ .compatible = "apple,smc-gpio", },
{}
};
MODULE_DEVICE_TABLE(of, macsmc_gpio_of_table);
static struct platform_driver macsmc_gpio_driver = {
.driver = {
.name = "macsmc-gpio",
.of_match_table = macsmc_gpio_of_table,
},
.probe = macsmc_gpio_probe,
};
module_platform_driver(macsmc_gpio_driver);
MODULE_AUTHOR("Hector Martin <marcan@marcan.st>");
MODULE_LICENSE("Dual MIT/GPL");
MODULE_DESCRIPTION("Apple SMC GPIO driver");

18
drivers/mfd/Kconfig
View File

@@ -285,6 +285,24 @@ config MFD_CS42L43_SDW
Select this to support the Cirrus Logic CS42L43 PC CODEC with
headphone and class D speaker drivers over SoundWire.
config MFD_MACSMC
tristate "Apple Silicon System Management Controller (SMC)"
depends on ARCH_APPLE || COMPILE_TEST
depends on OF
depends on APPLE_RTKIT
select MFD_CORE
help
The System Management Controller (SMC) on Apple Silicon machines is a
piece of hardware that exposes various functionalities such as
temperature sensors, voltage/power meters, shutdown/reboot handling,
GPIOs and more.
Communication happens via a shared mailbox using the RTKit protocol
which is also used for other co-processors. The SMC protocol then
allows reading and writing many different keys which implement the
various features. The MFD core device handles this protocol and
exposes it to the sub-devices.
config MFD_MADERA
tristate "Cirrus Logic Madera codecs"
select MFD_CORE

1
drivers/mfd/Makefile
View File

@@ -21,6 +21,7 @@ obj-$(CONFIG_MFD_CS42L43_SDW) += cs42l43-sdw.o
obj-$(CONFIG_MFD_ENE_KB3930) += ene-kb3930.o
obj-$(CONFIG_MFD_EXYNOS_LPASS) += exynos-lpass.o
obj-$(CONFIG_MFD_GATEWORKS_GSC) += gateworks-gsc.o
obj-$(CONFIG_MFD_MACSMC) += macsmc.o
obj-$(CONFIG_MFD_TI_LP873X) += lp873x.o
obj-$(CONFIG_MFD_TI_LP87565) += lp87565.o

498
drivers/mfd/macsmc.c Normal file
View File

@@ -0,0 +1,498 @@
// SPDX-License-Identifier: GPL-2.0-only OR MIT
/*
* Apple SMC (System Management Controller) MFD driver
*
* Copyright The Asahi Linux Contributors
*/
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/math.h>
#include <linux/mfd/core.h>
#include <linux/mfd/macsmc.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/overflow.h>
#include <linux/platform_device.h>
#include <linux/soc/apple/rtkit.h>
#include <linux/unaligned.h>
#define SMC_ENDPOINT 0x20
/* We don't actually know the true size here but this seem reasonable */
#define SMC_SHMEM_SIZE 0x1000
#define SMC_MAX_SIZE 255
#define SMC_MSG_READ_KEY 0x10
#define SMC_MSG_WRITE_KEY 0x11
#define SMC_MSG_GET_KEY_BY_INDEX 0x12
#define SMC_MSG_GET_KEY_INFO 0x13
#define SMC_MSG_INITIALIZE 0x17
#define SMC_MSG_NOTIFICATION 0x18
#define SMC_MSG_RW_KEY 0x20
#define SMC_DATA GENMASK_ULL(63, 32)
#define SMC_WSIZE GENMASK_ULL(31, 24)
#define SMC_SIZE GENMASK_ULL(23, 16)
#define SMC_ID GENMASK_ULL(15, 12)
#define SMC_MSG GENMASK_ULL(7, 0)
#define SMC_RESULT SMC_MSG
#define SMC_TIMEOUT_MS 500
static const struct mfd_cell apple_smc_devs[] = {
MFD_CELL_OF("macsmc-gpio", NULL, NULL, 0, 0, "apple,smc-gpio"),
MFD_CELL_OF("macsmc-reboot", NULL, NULL, 0, 0, "apple,smc-reboot"),
};
static int apple_smc_cmd_locked(struct apple_smc *smc, u64 cmd, u64 arg,
u64 size, u64 wsize, u32 *ret_data)
{
u8 result;
int ret;
u64 msg;
lockdep_assert_held(&smc->mutex);
if (smc->boot_stage != APPLE_SMC_INITIALIZED)
return -EIO;
if (smc->atomic_mode)
return -EIO;
reinit_completion(&smc->cmd_done);
smc->msg_id = (smc->msg_id + 1) & 0xf;
msg = (FIELD_PREP(SMC_MSG, cmd) |
FIELD_PREP(SMC_SIZE, size) |
FIELD_PREP(SMC_WSIZE, wsize) |
FIELD_PREP(SMC_ID, smc->msg_id) |
FIELD_PREP(SMC_DATA, arg));
ret = apple_rtkit_send_message(smc->rtk, SMC_ENDPOINT, msg, NULL, false);
if (ret) {
dev_err(smc->dev, "Failed to send command\n");
return ret;
}
if (wait_for_completion_timeout(&smc->cmd_done, msecs_to_jiffies(SMC_TIMEOUT_MS)) <= 0) {
dev_err(smc->dev, "Command timed out (%llx)", msg);
return -ETIMEDOUT;
}
if (FIELD_GET(SMC_ID, smc->cmd_ret) != smc->msg_id) {
dev_err(smc->dev, "Command sequence mismatch (expected %d, got %d)\n",
smc->msg_id, (unsigned int)FIELD_GET(SMC_ID, smc->cmd_ret));
return -EIO;
}
result = FIELD_GET(SMC_RESULT, smc->cmd_ret);
if (result)
return -EIO;
if (ret_data)
*ret_data = FIELD_GET(SMC_DATA, smc->cmd_ret);
return FIELD_GET(SMC_SIZE, smc->cmd_ret);
}
static int apple_smc_cmd(struct apple_smc *smc, u64 cmd, u64 arg,
u64 size, u64 wsize, u32 *ret_data)
{
guard(mutex)(&smc->mutex);
return apple_smc_cmd_locked(smc, cmd, arg, size, wsize, ret_data);
}
static int apple_smc_rw_locked(struct apple_smc *smc, smc_key key,
const void *wbuf, size_t wsize,
void *rbuf, size_t rsize)
{
u64 smc_size, smc_wsize;
u32 rdata;
int ret;
u64 cmd;
lockdep_assert_held(&smc->mutex);
if (rsize > SMC_MAX_SIZE)
return -EINVAL;
if (wsize > SMC_MAX_SIZE)
return -EINVAL;
if (rsize && wsize) {
cmd = SMC_MSG_RW_KEY;
memcpy_toio(smc->shmem.iomem, wbuf, wsize);
smc_size = rsize;
smc_wsize = wsize;
} else if (wsize && !rsize) {
cmd = SMC_MSG_WRITE_KEY;
memcpy_toio(smc->shmem.iomem, wbuf, wsize);
/*
* Setting size to the length we want to write and wsize to 0
* looks silly but that's how the SMC protocol works ¯\_(ツ)_/¯
*/
smc_size = wsize;
smc_wsize = 0;
} else if (!wsize && rsize) {
cmd = SMC_MSG_READ_KEY;
smc_size = rsize;
smc_wsize = 0;
} else {
return -EINVAL;
}
ret = apple_smc_cmd_locked(smc, cmd, key, smc_size, smc_wsize, &rdata);
if (ret < 0)
return ret;
if (rsize) {
/*
* Small data <= 4 bytes is returned as part of the reply
* message which is sent over the mailbox FIFO. Everything
* bigger has to be copied from SRAM which is mapped as
* Device memory.
*/
if (rsize <= 4)
memcpy(rbuf, &rdata, rsize);
else
memcpy_fromio(rbuf, smc->shmem.iomem, rsize);
}
return ret;
}
int apple_smc_read(struct apple_smc *smc, smc_key key, void *buf, size_t size)
{
guard(mutex)(&smc->mutex);
return apple_smc_rw_locked(smc, key, NULL, 0, buf, size);
}
EXPORT_SYMBOL(apple_smc_read);
int apple_smc_write(struct apple_smc *smc, smc_key key, void *buf, size_t size)
{
guard(mutex)(&smc->mutex);
return apple_smc_rw_locked(smc, key, buf, size, NULL, 0);
}
EXPORT_SYMBOL(apple_smc_write);
int apple_smc_rw(struct apple_smc *smc, smc_key key, void *wbuf, size_t wsize,
void *rbuf, size_t rsize)
{
guard(mutex)(&smc->mutex);
return apple_smc_rw_locked(smc, key, wbuf, wsize, rbuf, rsize);
}
EXPORT_SYMBOL(apple_smc_rw);
int apple_smc_get_key_by_index(struct apple_smc *smc, int index, smc_key *key)
{
int ret;
ret = apple_smc_cmd(smc, SMC_MSG_GET_KEY_BY_INDEX, index, 0, 0, key);
*key = swab32(*key);
return ret;
}
EXPORT_SYMBOL(apple_smc_get_key_by_index);
int apple_smc_get_key_info(struct apple_smc *smc, smc_key key, struct apple_smc_key_info *info)
{
u8 key_info[6];
int ret;
ret = apple_smc_cmd(smc, SMC_MSG_GET_KEY_INFO, key, 0, 0, NULL);
if (ret >= 0 && info) {
memcpy_fromio(key_info, smc->shmem.iomem, sizeof(key_info));
info->size = key_info[0];
info->type_code = get_unaligned_be32(&key_info[1]);
info->flags = key_info[5];
}
return ret;
}
EXPORT_SYMBOL(apple_smc_get_key_info);
int apple_smc_enter_atomic(struct apple_smc *smc)
{
guard(mutex)(&smc->mutex);
/*
* Disable notifications since this is called before shutdown and no
* notification handler will be able to handle the notification
* using atomic operations only. Also ignore any failure here
* because we're about to shut down or reboot anyway.
* We can't use apple_smc_write_flag here since that would try to lock
* smc->mutex again.
*/
const u8 flag = 0;
apple_smc_rw_locked(smc, SMC_KEY(NTAP), &flag, sizeof(flag), NULL, 0);
smc->atomic_mode = true;
return 0;
}
EXPORT_SYMBOL(apple_smc_enter_atomic);
int apple_smc_write_atomic(struct apple_smc *smc, smc_key key, void *buf, size_t size)
{
guard(spinlock_irqsave)(&smc->lock);
u8 result;
int ret;
u64 msg;
if (size > SMC_MAX_SIZE || size == 0)
return -EINVAL;
if (smc->boot_stage != APPLE_SMC_INITIALIZED)
return -EIO;
if (!smc->atomic_mode)
return -EIO;
memcpy_toio(smc->shmem.iomem, buf, size);
smc->msg_id = (smc->msg_id + 1) & 0xf;
msg = (FIELD_PREP(SMC_MSG, SMC_MSG_WRITE_KEY) |
FIELD_PREP(SMC_SIZE, size) |
FIELD_PREP(SMC_ID, smc->msg_id) |
FIELD_PREP(SMC_DATA, key));
smc->atomic_pending = true;
ret = apple_rtkit_send_message(smc->rtk, SMC_ENDPOINT, msg, NULL, true);
if (ret < 0) {
dev_err(smc->dev, "Failed to send command (%d)\n", ret);
return ret;
}
while (smc->atomic_pending) {
ret = apple_rtkit_poll(smc->rtk);
if (ret < 0) {
dev_err(smc->dev, "RTKit poll failed (%llx)", msg);
return ret;
}
udelay(100);
}
if (FIELD_GET(SMC_ID, smc->cmd_ret) != smc->msg_id) {
dev_err(smc->dev, "Command sequence mismatch (expected %d, got %d)\n",
smc->msg_id, (unsigned int)FIELD_GET(SMC_ID, smc->cmd_ret));
return -EIO;
}
result = FIELD_GET(SMC_RESULT, smc->cmd_ret);
if (result)
return -EIO;
return FIELD_GET(SMC_SIZE, smc->cmd_ret);
}
EXPORT_SYMBOL(apple_smc_write_atomic);
static void apple_smc_rtkit_crashed(void *cookie, const void *bfr, size_t bfr_len)
{
struct apple_smc *smc = cookie;
smc->boot_stage = APPLE_SMC_ERROR_CRASHED;
dev_err(smc->dev, "SMC crashed! Your system will reboot in a few seconds...\n");
}
static int apple_smc_rtkit_shmem_setup(void *cookie, struct apple_rtkit_shmem *bfr)
{
struct apple_smc *smc = cookie;
size_t bfr_end;
if (!bfr->iova) {
dev_err(smc->dev, "RTKit wants a RAM buffer\n");
return -EIO;
}
if (check_add_overflow(bfr->iova, bfr->size - 1, &bfr_end))
return -EFAULT;
if (bfr->iova < smc->sram->start || bfr->iova > smc->sram->end ||
bfr_end > smc->sram->end) {
dev_err(smc->dev, "RTKit buffer request outside SRAM region: [0x%llx, 0x%llx]\n",
(unsigned long long)bfr->iova,
(unsigned long long)bfr_end);
return -EFAULT;
}
bfr->iomem = smc->sram_base + (bfr->iova - smc->sram->start);
bfr->is_mapped = true;
return 0;
}
static bool apple_smc_rtkit_recv_early(void *cookie, u8 endpoint, u64 message)
{
struct apple_smc *smc = cookie;
if (endpoint != SMC_ENDPOINT) {
dev_warn(smc->dev, "Received message for unknown endpoint 0x%x\n", endpoint);
return false;
}
if (smc->boot_stage == APPLE_SMC_BOOTING) {
int ret;
smc->shmem.iova = message;
smc->shmem.size = SMC_SHMEM_SIZE;
ret = apple_smc_rtkit_shmem_setup(smc, &smc->shmem);
if (ret < 0) {
smc->boot_stage = APPLE_SMC_ERROR_NO_SHMEM;
dev_err(smc->dev, "Failed to initialize shared memory (%d)\n", ret);
} else {
smc->boot_stage = APPLE_SMC_INITIALIZED;
}
complete(&smc->init_done);
} else if (FIELD_GET(SMC_MSG, message) == SMC_MSG_NOTIFICATION) {
/* Handle these in the RTKit worker thread */
return false;
} else {
smc->cmd_ret = message;
if (smc->atomic_pending)
smc->atomic_pending = false;
else
complete(&smc->cmd_done);
}
return true;
}
static void apple_smc_rtkit_recv(void *cookie, u8 endpoint, u64 message)
{
struct apple_smc *smc = cookie;
if (endpoint != SMC_ENDPOINT) {
dev_warn(smc->dev, "Received message for unknown endpoint 0x%x\n", endpoint);
return;
}
if (FIELD_GET(SMC_MSG, message) != SMC_MSG_NOTIFICATION) {
dev_warn(smc->dev, "Received unknown message from worker: 0x%llx\n", message);
return;
}
blocking_notifier_call_chain(&smc->event_handlers, FIELD_GET(SMC_DATA, message), NULL);
}
static const struct apple_rtkit_ops apple_smc_rtkit_ops = {
.crashed = apple_smc_rtkit_crashed,
.recv_message = apple_smc_rtkit_recv,
.recv_message_early = apple_smc_rtkit_recv_early,
.shmem_setup = apple_smc_rtkit_shmem_setup,
};
static void apple_smc_rtkit_shutdown(void *data)
{
struct apple_smc *smc = data;
/* Shut down SMC firmware, if it's not completely wedged */
if (apple_rtkit_is_running(smc->rtk))
apple_rtkit_quiesce(smc->rtk);
}
static void apple_smc_disable_notifications(void *data)
{
struct apple_smc *smc = data;
apple_smc_write_flag(smc, SMC_KEY(NTAP), false);
}
static int apple_smc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct apple_smc *smc;
u32 count;
int ret;
smc = devm_kzalloc(dev, sizeof(*smc), GFP_KERNEL);
if (!smc)
return -ENOMEM;
smc->dev = &pdev->dev;
smc->sram_base = devm_platform_get_and_ioremap_resource(pdev, 1, &smc->sram);
if (IS_ERR(smc->sram_base))
return dev_err_probe(dev, PTR_ERR(smc->sram_base), "Failed to map SRAM region");
smc->rtk = devm_apple_rtkit_init(dev, smc, NULL, 0, &apple_smc_rtkit_ops);
if (IS_ERR(smc->rtk))
return dev_err_probe(dev, PTR_ERR(smc->rtk), "Failed to initialize RTKit");
smc->boot_stage = APPLE_SMC_BOOTING;
ret = apple_rtkit_wake(smc->rtk);
if (ret)
return dev_err_probe(dev, ret, "Failed to wake up SMC");
ret = devm_add_action_or_reset(dev, apple_smc_rtkit_shutdown, smc);
if (ret)
return dev_err_probe(dev, ret, "Failed to register rtkit shutdown action");
ret = apple_rtkit_start_ep(smc->rtk, SMC_ENDPOINT);
if (ret)
return dev_err_probe(dev, ret, "Failed to start SMC endpoint");
init_completion(&smc->init_done);
init_completion(&smc->cmd_done);
ret = apple_rtkit_send_message(smc->rtk, SMC_ENDPOINT,
FIELD_PREP(SMC_MSG, SMC_MSG_INITIALIZE), NULL, false);
if (ret)
return dev_err_probe(dev, ret, "Failed to send init message");
if (wait_for_completion_timeout(&smc->init_done, msecs_to_jiffies(SMC_TIMEOUT_MS)) == 0) {
dev_err(dev, "Timed out initializing SMC");
return -ETIMEDOUT;
}
if (smc->boot_stage != APPLE_SMC_INITIALIZED) {
dev_err(dev, "SMC failed to boot successfully, boot stage=%d\n", smc->boot_stage);
return -EIO;
}
dev_set_drvdata(&pdev->dev, smc);
BLOCKING_INIT_NOTIFIER_HEAD(&smc->event_handlers);
ret = apple_smc_read_u32(smc, SMC_KEY(#KEY), &count);
if (ret)
return dev_err_probe(smc->dev, ret, "Failed to get key count");
smc->key_count = be32_to_cpu(count);
/* Enable notifications */
apple_smc_write_flag(smc, SMC_KEY(NTAP), true);
ret = devm_add_action_or_reset(dev, apple_smc_disable_notifications, smc);
if (ret)
return dev_err_probe(dev, ret, "Failed to register notification disable action");
ret = devm_mfd_add_devices(smc->dev, PLATFORM_DEVID_NONE,
apple_smc_devs, ARRAY_SIZE(apple_smc_devs),
NULL, 0, NULL);
if (ret)
return dev_err_probe(smc->dev, ret, "Failed to register sub-devices");
return 0;
}
static const struct of_device_id apple_smc_of_match[] = {
{ .compatible = "apple,smc" },
{},
};
MODULE_DEVICE_TABLE(of, apple_smc_of_match);
static struct platform_driver apple_smc_driver = {
.driver = {
.name = "macsmc",
.of_match_table = apple_smc_of_match,
},
.probe = apple_smc_probe,
};
module_platform_driver(apple_smc_driver);
MODULE_AUTHOR("Hector Martin <marcan@marcan.st>");
MODULE_AUTHOR("Sven Peter <sven@kernel.org>");
MODULE_LICENSE("Dual MIT/GPL");
MODULE_DESCRIPTION("Apple SMC driver");

88
drivers/mfd/tps6594-core.c
View File

@@ -1,6 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Core functions for TI TPS65224/TPS6594/TPS6593/LP8764 PMICs
* Core functions for following TI PMICs:
* - LP8764
* - TPS65224
* - TPS652G1
* - TPS6593
* - TPS6594
*
* Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
*/
@@ -414,6 +419,61 @@ static const unsigned int tps65224_irq_reg[] = {
TPS6594_REG_INT_FSM_ERR,
};
/* TPS652G1 Resources */
static const struct mfd_cell tps652g1_common_cells[] = {
MFD_CELL_RES("tps6594-pfsm", tps65224_pfsm_resources),
MFD_CELL_RES("tps6594-pinctrl", tps65224_pinctrl_resources),
MFD_CELL_NAME("tps6594-regulator"),
};
static const struct regmap_irq tps652g1_irqs[] = {
/* INT_GPIO register */
REGMAP_IRQ_REG(TPS65224_IRQ_GPIO1, 2, TPS65224_BIT_GPIO1_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_GPIO2, 2, TPS65224_BIT_GPIO2_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_GPIO3, 2, TPS65224_BIT_GPIO3_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_GPIO4, 2, TPS65224_BIT_GPIO4_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_GPIO5, 2, TPS65224_BIT_GPIO5_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_GPIO6, 2, TPS65224_BIT_GPIO6_INT),
/* INT_STARTUP register */
REGMAP_IRQ_REG(TPS65224_IRQ_VSENSE, 3, TPS65224_BIT_VSENSE_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_ENABLE, 3, TPS6594_BIT_ENABLE_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_PB_SHORT, 3, TPS65224_BIT_PB_SHORT_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_FSD, 3, TPS6594_BIT_FSD_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_SOFT_REBOOT, 3, TPS6594_BIT_SOFT_REBOOT_INT),
/* INT_MISC register */
REGMAP_IRQ_REG(TPS65224_IRQ_BIST_PASS, 4, TPS6594_BIT_BIST_PASS_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_EXT_CLK, 4, TPS6594_BIT_EXT_CLK_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_REG_UNLOCK, 4, TPS65224_BIT_REG_UNLOCK_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_TWARN, 4, TPS6594_BIT_TWARN_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_PB_LONG, 4, TPS65224_BIT_PB_LONG_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_PB_FALL, 4, TPS65224_BIT_PB_FALL_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_PB_RISE, 4, TPS65224_BIT_PB_RISE_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_ADC_CONV_READY, 4, TPS65224_BIT_ADC_CONV_READY_INT),
/* INT_MODERATE_ERR register */
REGMAP_IRQ_REG(TPS65224_IRQ_TSD_ORD, 5, TPS6594_BIT_TSD_ORD_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_BIST_FAIL, 5, TPS6594_BIT_BIST_FAIL_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_REG_CRC_ERR, 5, TPS6594_BIT_REG_CRC_ERR_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_RECOV_CNT, 5, TPS6594_BIT_RECOV_CNT_INT),
/* INT_SEVERE_ERR register */
REGMAP_IRQ_REG(TPS65224_IRQ_TSD_IMM, 6, TPS6594_BIT_TSD_IMM_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_VCCA_OVP, 6, TPS6594_BIT_VCCA_OVP_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_PFSM_ERR, 6, TPS6594_BIT_PFSM_ERR_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_BG_XMON, 6, TPS65224_BIT_BG_XMON_INT),
/* INT_FSM_ERR register */
REGMAP_IRQ_REG(TPS65224_IRQ_IMM_SHUTDOWN, 7, TPS6594_BIT_IMM_SHUTDOWN_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_ORD_SHUTDOWN, 7, TPS6594_BIT_ORD_SHUTDOWN_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_MCU_PWR_ERR, 7, TPS6594_BIT_MCU_PWR_ERR_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_SOC_PWR_ERR, 7, TPS6594_BIT_SOC_PWR_ERR_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_COMM_ERR, 7, TPS6594_BIT_COMM_ERR_INT),
REGMAP_IRQ_REG(TPS65224_IRQ_I2C2_ERR, 7, TPS65224_BIT_I2C2_ERR_INT),
};
static inline unsigned int tps6594_get_irq_reg(struct regmap_irq_chip_data *data,
unsigned int base, int index)
{
@@ -443,7 +503,7 @@ static int tps6594_handle_post_irq(void *irq_drv_data)
* a new interrupt.
*/
if (tps->use_crc) {
if (tps->chip_id == TPS65224) {
if (tps->chip_id == TPS65224 || tps->chip_id == TPS652G1) {
regmap_reg = TPS6594_REG_INT_FSM_ERR;
mask_val = TPS6594_BIT_COMM_ERR_INT;
} else {
@@ -481,6 +541,18 @@ static struct regmap_irq_chip tps65224_irq_chip = {
.handle_post_irq = tps6594_handle_post_irq,
};
static struct regmap_irq_chip tps652g1_irq_chip = {
.ack_base = TPS6594_REG_INT_BUCK,
.ack_invert = 1,
.clear_ack = 1,
.init_ack_masked = 1,
.num_regs = ARRAY_SIZE(tps65224_irq_reg),
.irqs = tps652g1_irqs,
.num_irqs = ARRAY_SIZE(tps652g1_irqs),
.get_irq_reg = tps65224_get_irq_reg,
.handle_post_irq = tps6594_handle_post_irq,
};
static const struct regmap_range tps6594_volatile_ranges[] = {
regmap_reg_range(TPS6594_REG_INT_TOP, TPS6594_REG_STAT_READBACK_ERR),
regmap_reg_range(TPS6594_REG_RTC_STATUS, TPS6594_REG_RTC_STATUS),
@@ -507,7 +579,7 @@ static int tps6594_check_crc_mode(struct tps6594 *tps, bool primary_pmic)
int ret;
unsigned int regmap_reg, mask_val;
if (tps->chip_id == TPS65224) {
if (tps->chip_id == TPS65224 || tps->chip_id == TPS652G1) {
regmap_reg = TPS6594_REG_CONFIG_2;
mask_val = TPS65224_BIT_I2C1_SPI_CRC_EN;
} else {
@@ -537,7 +609,7 @@ static int tps6594_set_crc_feature(struct tps6594 *tps)
int ret;
unsigned int regmap_reg, mask_val;
if (tps->chip_id == TPS65224) {
if (tps->chip_id == TPS65224 || tps->chip_id == TPS652G1) {
regmap_reg = TPS6594_REG_CONFIG_2;
mask_val = TPS65224_BIT_I2C1_SPI_CRC_EN;
} else {
@@ -628,6 +700,10 @@ int tps6594_device_init(struct tps6594 *tps, bool enable_crc)
irq_chip = &tps65224_irq_chip;
n_cells = ARRAY_SIZE(tps65224_common_cells);
cells = tps65224_common_cells;
} else if (tps->chip_id == TPS652G1) {
irq_chip = &tps652g1_irq_chip;
n_cells = ARRAY_SIZE(tps652g1_common_cells);
cells = tps652g1_common_cells;
} else {
irq_chip = &tps6594_irq_chip;
n_cells = ARRAY_SIZE(tps6594_common_cells);
@@ -651,8 +727,8 @@ int tps6594_device_init(struct tps6594 *tps, bool enable_crc)
if (ret)
return dev_err_probe(dev, ret, "Failed to add common child devices\n");
/* No RTC for LP8764 and TPS65224 */
if (tps->chip_id != LP8764 && tps->chip_id != TPS65224) {
/* No RTC for LP8764, TPS65224 and TPS652G1 */
if (tps->chip_id != LP8764 && tps->chip_id != TPS65224 && tps->chip_id != TPS652G1) {
ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, tps6594_rtc_cells,
ARRAY_SIZE(tps6594_rtc_cells), NULL, 0,
regmap_irq_get_domain(tps->irq_data));

10
drivers/mfd/tps6594-i2c.c
View File

@@ -1,6 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
/*
* I2C access driver for TI TPS65224/TPS6594/TPS6593/LP8764 PMICs
* I2C access driver for the following TI PMICs:
* - LP8764
* - TPS65224
* - TPS652G1
* - TPS6593
* - TPS6594
*
* Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
*/
@@ -197,6 +202,7 @@ static const struct of_device_id tps6594_i2c_of_match_table[] = {
{ .compatible = "ti,tps6593-q1", .data = (void *)TPS6593, },
{ .compatible = "ti,lp8764-q1", .data = (void *)LP8764, },
{ .compatible = "ti,tps65224-q1", .data = (void *)TPS65224, },
{ .compatible = "ti,tps652g1", .data = (void *)TPS652G1, },
{}
};
MODULE_DEVICE_TABLE(of, tps6594_i2c_of_match_table);
@@ -222,7 +228,7 @@ static int tps6594_i2c_probe(struct i2c_client *client)
return dev_err_probe(dev, -EINVAL, "Failed to find matching chip ID\n");
tps->chip_id = (unsigned long)match->data;
if (tps->chip_id == TPS65224)
if (tps->chip_id == TPS65224 || tps->chip_id == TPS652G1)
tps6594_i2c_regmap_config.volatile_table = &tps65224_volatile_table;
tps->regmap = devm_regmap_init(dev, NULL, client, &tps6594_i2c_regmap_config);

10
drivers/mfd/tps6594-spi.c
View File

@@ -1,6 +1,11 @@
// SPDX-License-Identifier: GPL-2.0
/*
* SPI access driver for TI TPS65224/TPS6594/TPS6593/LP8764 PMICs
* SPI access driver for the following TI PMICs:
* - LP8764
* - TPS65224
* - TPS652G1
* - TPS6593
* - TPS6594
*
* Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
*/
@@ -82,6 +87,7 @@ static const struct of_device_id tps6594_spi_of_match_table[] = {
{ .compatible = "ti,tps6593-q1", .data = (void *)TPS6593, },
{ .compatible = "ti,lp8764-q1", .data = (void *)LP8764, },
{ .compatible = "ti,tps65224-q1", .data = (void *)TPS65224, },
{ .compatible = "ti,tps652g1", .data = (void *)TPS652G1, },
{}
};
MODULE_DEVICE_TABLE(of, tps6594_spi_of_match_table);
@@ -107,7 +113,7 @@ static int tps6594_spi_probe(struct spi_device *spi)
return dev_err_probe(dev, -EINVAL, "Failed to find matching chip ID\n");
tps->chip_id = (unsigned long)match->data;
if (tps->chip_id == TPS65224)
if (tps->chip_id == TPS65224 || tps->chip_id == TPS652G1)
tps6594_spi_regmap_config.volatile_table = &tps65224_volatile_table;
tps->regmap = devm_regmap_init(dev, NULL, spi, &tps6594_spi_regmap_config);

31
drivers/misc/tps6594-pfsm.c
View File

@@ -1,6 +1,12 @@
// SPDX-License-Identifier: GPL-2.0
/*
* PFSM (Pre-configurable Finite State Machine) driver for TI TPS65224/TPS6594/TPS6593/LP8764 PMICs
* PFSM (Pre-configurable Finite State Machine) driver for the following
* PMICs:
* - LP8764
* - TPS65224
* - TPS652G1
* - TPS6594
* - TPS6593
*
* Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
*/
@@ -141,7 +147,7 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
switch (cmd) {
case PMIC_GOTO_STANDBY:
/* Disable LP mode on TPS6594 Family PMIC */
if (pfsm->chip_id != TPS65224) {
if (pfsm->chip_id != TPS65224 && pfsm->chip_id != TPS652G1) {
ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_RTC_CTRL_2,
TPS6594_BIT_LP_STANDBY_SEL);
@@ -154,8 +160,8 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
TPS6594_BIT_TRIGGER_I2C(0), TPS6594_BIT_TRIGGER_I2C(0));
break;
case PMIC_GOTO_LP_STANDBY:
/* TPS65224 does not support LP STANDBY */
if (pfsm->chip_id == TPS65224)
/* TPS65224/TPS652G1 does not support LP STANDBY */
if (pfsm->chip_id == TPS65224 || pfsm->chip_id == TPS652G1)
return ret;
/* Enable LP mode */
@@ -179,8 +185,8 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
TPS6594_BIT_NSLEEP1B | TPS6594_BIT_NSLEEP2B);
break;
case PMIC_SET_MCU_ONLY_STATE:
/* TPS65224 does not support MCU_ONLY_STATE */
if (pfsm->chip_id == TPS65224)
/* TPS65224/TPS652G1 does not support MCU_ONLY_STATE */
if (pfsm->chip_id == TPS65224 || pfsm->chip_id == TPS652G1)
return ret;
if (copy_from_user(&state_opt, argp, sizeof(state_opt)))
@@ -206,7 +212,7 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
return -EFAULT;
/* Configure wake-up destination */
if (pfsm->chip_id == TPS65224) {
if (pfsm->chip_id == TPS65224 || pfsm->chip_id == TPS652G1) {
regmap_reg = TPS65224_REG_STARTUP_CTRL;
mask = TPS65224_MASK_STARTUP_DEST;
} else {
@@ -230,9 +236,14 @@ static long tps6594_pfsm_ioctl(struct file *f, unsigned int cmd, unsigned long a
return ret;
/* Modify NSLEEP1-2 bits */
ret = regmap_clear_bits(pfsm->regmap, TPS6594_REG_FSM_NSLEEP_TRIGGERS,
pfsm->chip_id == TPS65224 ?
TPS6594_BIT_NSLEEP1B : TPS6594_BIT_NSLEEP2B);
if (pfsm->chip_id == TPS65224 || pfsm->chip_id == TPS652G1)
ret = regmap_clear_bits(pfsm->regmap,
TPS6594_REG_FSM_NSLEEP_TRIGGERS,
TPS6594_BIT_NSLEEP1B);
else
ret = regmap_clear_bits(pfsm->regmap,
TPS6594_REG_FSM_NSLEEP_TRIGGERS,
TPS6594_BIT_NSLEEP2B);
break;
}

35
drivers/pinctrl/pinctrl-tps6594.c
View File

@@ -226,6 +226,10 @@ static const char *const tps65224_nerr_mcu_func_group_names[] = {
"GPIO5",
};
static const char *const tps652g1_cs_spi_func_group_names[] = {
"GPIO1",
};
struct tps6594_pinctrl_function {
struct pinfunction pinfunction;
u8 muxval;
@@ -287,6 +291,18 @@ static const struct tps6594_pinctrl_function tps65224_pinctrl_functions[] = {
FUNCTION(tps65224, nerr_mcu, TPS65224_PINCTRL_NERR_MCU_FUNCTION),
};
static const struct tps6594_pinctrl_function tps652g1_pinctrl_functions[] = {
FUNCTION(tps65224, gpio, TPS6594_PINCTRL_GPIO_FUNCTION),
FUNCTION(tps65224, sda_i2c2_sdo_spi, TPS65224_PINCTRL_SDA_I2C2_SDO_SPI_FUNCTION),
FUNCTION(tps65224, nsleep2, TPS65224_PINCTRL_NSLEEP2_FUNCTION),
FUNCTION(tps65224, nint, TPS65224_PINCTRL_NINT_FUNCTION),
FUNCTION(tps652g1, cs_spi, TPS65224_PINCTRL_SCL_I2C2_CS_SPI_FUNCTION),
FUNCTION(tps65224, nsleep1, TPS65224_PINCTRL_NSLEEP1_FUNCTION),
FUNCTION(tps65224, pb, TPS65224_PINCTRL_PB_FUNCTION),
FUNCTION(tps65224, wkup, TPS65224_PINCTRL_WKUP_FUNCTION),
FUNCTION(tps65224, syncclkin, TPS65224_PINCTRL_SYNCCLKIN_FUNCTION),
};
struct tps6594_pinctrl {
struct tps6594 *tps;
struct gpio_regmap *gpio_regmap;
@@ -300,6 +316,16 @@ struct tps6594_pinctrl {
struct muxval_remap *remap;
};
static struct tps6594_pinctrl tps652g1_template_pinctrl = {
.funcs = tps652g1_pinctrl_functions,
.func_cnt = ARRAY_SIZE(tps652g1_pinctrl_functions),
.pins = tps65224_pins,
.num_pins = ARRAY_SIZE(tps65224_pins),
.mux_sel_mask = TPS65224_MASK_GPIO_SEL,
.remap = tps65224_muxval_remap,
.remap_cnt = ARRAY_SIZE(tps65224_muxval_remap),
};
static struct tps6594_pinctrl tps65224_template_pinctrl = {
.funcs = tps65224_pinctrl_functions,
.func_cnt = ARRAY_SIZE(tps65224_pinctrl_functions),
@@ -475,6 +501,15 @@ static int tps6594_pinctrl_probe(struct platform_device *pdev)
return -ENOMEM;
switch (tps->chip_id) {
case TPS652G1:
pctrl_desc->pins = tps65224_pins;
pctrl_desc->npins = ARRAY_SIZE(tps65224_pins);
*pinctrl = tps652g1_template_pinctrl;
config.ngpio = ARRAY_SIZE(tps65224_gpio_func_group_names);
config.ngpio_per_reg = TPS65224_NGPIO_PER_REG;
break;
case TPS65224:
pctrl_desc->pins = tps65224_pins;
pctrl_desc->npins = ARRAY_SIZE(tps65224_pins);

9
drivers/power/reset/Kconfig
View File

@@ -128,6 +128,15 @@ config POWER_RESET_LINKSTATION
Say Y here if you have a Buffalo LinkStation LS421D/E.
config POWER_RESET_MACSMC
tristate "Apple SMC reset/power-off driver"
depends on MFD_MACSMC
help
This driver supports reset and power-off on Apple Mac machines
that implement this functionality via the SMC.
Say Y here if you have an Apple Silicon Mac.
config POWER_RESET_MSM
bool "Qualcomm MSM power-off driver"
depends on ARCH_QCOM

1
drivers/power/reset/Makefile
View File

@@ -13,6 +13,7 @@ obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o
obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
obj-$(CONFIG_POWER_RESET_LINKSTATION) += linkstation-poweroff.o
obj-$(CONFIG_POWER_RESET_MACSMC) += macsmc-reboot.o
obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
obj-$(CONFIG_POWER_RESET_MT6323) += mt6323-poweroff.o
obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o

290
drivers/power/reset/macsmc-reboot.c Normal file
View File

@@ -0,0 +1,290 @@
// SPDX-License-Identifier: GPL-2.0-only OR MIT
/*
* Apple SMC Reboot/Poweroff Handler
* Copyright The Asahi Linux Contributors
*/
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/mfd/macsmc.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/nvmem-consumer.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/slab.h>
struct macsmc_reboot_nvmem {
struct nvmem_cell *shutdown_flag;
struct nvmem_cell *boot_stage;
struct nvmem_cell *boot_error_count;
struct nvmem_cell *panic_count;
};
static const char * const nvmem_names[] = {
"shutdown_flag",
"boot_stage",
"boot_error_count",
"panic_count",
};
enum boot_stage {
BOOT_STAGE_SHUTDOWN = 0x00, /* Clean shutdown */
BOOT_STAGE_IBOOT_DONE = 0x2f, /* Last stage of bootloader */
BOOT_STAGE_KERNEL_STARTED = 0x30, /* Normal OS booting */
};
struct macsmc_reboot {
struct device *dev;
struct apple_smc *smc;
struct notifier_block reboot_notify;
union {
struct macsmc_reboot_nvmem nvm;
struct nvmem_cell *nvm_cells[ARRAY_SIZE(nvmem_names)];
};
};
/* Helpers to read/write a u8 given a struct nvmem_cell */
static int nvmem_cell_get_u8(struct nvmem_cell *cell)
{
size_t len;
void *bfr;
u8 val;
bfr = nvmem_cell_read(cell, &len);
if (IS_ERR(bfr))
return PTR_ERR(bfr);
if (len < 1) {
kfree(bfr);
return -EINVAL;
}
val = *(u8 *)bfr;
kfree(bfr);
return val;
}
static int nvmem_cell_set_u8(struct nvmem_cell *cell, u8 val)
{
return nvmem_cell_write(cell, &val, sizeof(val));
}
/*
* SMC 'MBSE' key actions:
*
* 'offw' - shutdown warning
* 'slpw' - sleep warning
* 'rest' - restart warning
* 'off1' - shutdown (needs PMU bit set to stay on)
* 'susp' - suspend
* 'phra' - restart ("PE Halt Restart Action"?)
* 'panb' - panic beginning
* 'pane' - panic end
*/
static int macsmc_prepare_atomic(struct sys_off_data *data)
{
struct macsmc_reboot *reboot = data->cb_data;
dev_info(reboot->dev, "Preparing SMC for atomic mode\n");
apple_smc_enter_atomic(reboot->smc);
return NOTIFY_OK;
}
static int macsmc_power_off(struct sys_off_data *data)
{
struct macsmc_reboot *reboot = data->cb_data;
dev_info(reboot->dev, "Issuing power off (off1)\n");
if (apple_smc_write_u32_atomic(reboot->smc, SMC_KEY(MBSE), SMC_KEY(off1)) < 0) {
dev_err(reboot->dev, "Failed to issue MBSE = off1 (power_off)\n");
} else {
mdelay(100);
WARN_ONCE(1, "Unable to power off system\n");
}
return NOTIFY_OK;
}
static int macsmc_restart(struct sys_off_data *data)
{
struct macsmc_reboot *reboot = data->cb_data;
dev_info(reboot->dev, "Issuing restart (phra)\n");
if (apple_smc_write_u32_atomic(reboot->smc, SMC_KEY(MBSE), SMC_KEY(phra)) < 0) {
dev_err(reboot->dev, "Failed to issue MBSE = phra (restart)\n");
} else {
mdelay(100);
WARN_ONCE(1, "Unable to restart system\n");
}
return NOTIFY_OK;
}
static int macsmc_reboot_notify(struct notifier_block *this, unsigned long action, void *data)
{
struct macsmc_reboot *reboot = container_of(this, struct macsmc_reboot, reboot_notify);
u8 shutdown_flag;
u32 val;
switch (action) {
case SYS_RESTART:
val = SMC_KEY(rest);
shutdown_flag = 0;
break;
case SYS_POWER_OFF:
val = SMC_KEY(offw);
shutdown_flag = 1;
break;
default:
return NOTIFY_DONE;
}
dev_info(reboot->dev, "Preparing for reboot (%p4ch)\n", &val);
/* On the Mac Mini, this will turn off the LED for power off */
if (apple_smc_write_u32(reboot->smc, SMC_KEY(MBSE), val) < 0)
dev_err(reboot->dev, "Failed to issue MBSE = %p4ch (reboot_prepare)\n", &val);
/* Set the boot_stage to 0, which means we're doing a clean shutdown/reboot. */
if (reboot->nvm.boot_stage &&
nvmem_cell_set_u8(reboot->nvm.boot_stage, BOOT_STAGE_SHUTDOWN) < 0)
dev_err(reboot->dev, "Failed to write boot_stage\n");
/*
* Set the PMU flag to actually reboot into the off state.
* Without this, the device will just reboot. We make it optional in case it is no longer
* necessary on newer hardware.
*/
if (reboot->nvm.shutdown_flag &&
nvmem_cell_set_u8(reboot->nvm.shutdown_flag, shutdown_flag) < 0)
dev_err(reboot->dev, "Failed to write shutdown_flag\n");
return NOTIFY_OK;
}
static void macsmc_power_init_error_counts(struct macsmc_reboot *reboot)
{
int boot_error_count, panic_count;
if (!reboot->nvm.boot_error_count || !reboot->nvm.panic_count)
return;
boot_error_count = nvmem_cell_get_u8(reboot->nvm.boot_error_count);
if (boot_error_count < 0) {
dev_err(reboot->dev, "Failed to read boot_error_count (%d)\n", boot_error_count);
return;
}
panic_count = nvmem_cell_get_u8(reboot->nvm.panic_count);
if (panic_count < 0) {
dev_err(reboot->dev, "Failed to read panic_count (%d)\n", panic_count);
return;
}
if (!boot_error_count && !panic_count)
return;
dev_warn(reboot->dev, "PMU logged %d boot error(s) and %d panic(s)\n",
boot_error_count, panic_count);
if (nvmem_cell_set_u8(reboot->nvm.panic_count, 0) < 0)
dev_err(reboot->dev, "Failed to reset panic_count\n");
if (nvmem_cell_set_u8(reboot->nvm.boot_error_count, 0) < 0)
dev_err(reboot->dev, "Failed to reset boot_error_count\n");
}
static int macsmc_reboot_probe(struct platform_device *pdev)
{
struct apple_smc *smc = dev_get_drvdata(pdev->dev.parent);
struct macsmc_reboot *reboot;
int ret, i;
reboot = devm_kzalloc(&pdev->dev, sizeof(*reboot), GFP_KERNEL);
if (!reboot)
return -ENOMEM;
reboot->dev = &pdev->dev;
reboot->smc = smc;
platform_set_drvdata(pdev, reboot);
for (i = 0; i < ARRAY_SIZE(nvmem_names); i++) {
struct nvmem_cell *cell;
cell = devm_nvmem_cell_get(&pdev->dev,
nvmem_names[i]);
if (IS_ERR(cell)) {
if (PTR_ERR(cell) == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_warn(&pdev->dev, "Missing NVMEM cell %s (%ld)\n",
nvmem_names[i], PTR_ERR(cell));
/* Non fatal, we'll deal with it */
cell = NULL;
}
reboot->nvm_cells[i] = cell;
}
/* Set the boot_stage to indicate we're running the OS kernel */
if (reboot->nvm.boot_stage &&
nvmem_cell_set_u8(reboot->nvm.boot_stage, BOOT_STAGE_KERNEL_STARTED) < 0)
dev_err(reboot->dev, "Failed to write boot_stage\n");
/* Display and clear the error counts */
macsmc_power_init_error_counts(reboot);
reboot->reboot_notify.notifier_call = macsmc_reboot_notify;
ret = devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_POWER_OFF_PREPARE,
SYS_OFF_PRIO_HIGH, macsmc_prepare_atomic, reboot);
if (ret)
return dev_err_probe(&pdev->dev, ret,
"Failed to register power-off prepare handler\n");
ret = devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_POWER_OFF, SYS_OFF_PRIO_HIGH,
macsmc_power_off, reboot);
if (ret)
return dev_err_probe(&pdev->dev, ret,
"Failed to register power-off handler\n");
ret = devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART_PREPARE,
SYS_OFF_PRIO_HIGH, macsmc_prepare_atomic, reboot);
if (ret)
return dev_err_probe(&pdev->dev, ret,
"Failed to register restart prepare handler\n");
ret = devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART, SYS_OFF_PRIO_HIGH,
macsmc_restart, reboot);
if (ret)
return dev_err_probe(&pdev->dev, ret, "Failed to register restart handler\n");
ret = devm_register_reboot_notifier(&pdev->dev, &reboot->reboot_notify);
if (ret)
return dev_err_probe(&pdev->dev, ret, "Failed to register reboot notifier\n");
dev_info(&pdev->dev, "Handling reboot and poweroff requests via SMC\n");
return 0;
}
static const struct of_device_id macsmc_reboot_of_table[] = {
{ .compatible = "apple,smc-reboot", },
{}
};
MODULE_DEVICE_TABLE(of, macsmc_reboot_of_table);
static struct platform_driver macsmc_reboot_driver = {
.driver = {
.name = "macsmc-reboot",
.of_match_table = macsmc_reboot_of_table,
},
.probe = macsmc_reboot_probe,
};
module_platform_driver(macsmc_reboot_driver);
MODULE_LICENSE("Dual MIT/GPL");
MODULE_DESCRIPTION("Apple SMC reboot/poweroff driver");
MODULE_AUTHOR("Hector Martin <marcan@marcan.st>");

3
drivers/soc/apple/rtkit.c
View File

@@ -279,8 +279,7 @@ static int apple_rtkit_common_rx_get_buffer(struct apple_rtkit *rtk,
dev_dbg(rtk->dev, "RTKit: buffer request for 0x%zx bytes at %pad\n",
buffer->size, &buffer->iova);
if (buffer->iova &&
(!rtk->ops->shmem_setup || !rtk->ops->shmem_destroy)) {
if (buffer->iova && !rtk->ops->shmem_setup) {
err = -EINVAL;
goto error;
}

279
include/linux/mfd/macsmc.h Normal file
View File

@@ -0,0 +1,279 @@
/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
/*
* Apple SMC (System Management Controller) core definitions
*
* Copyright (C) The Asahi Linux Contributors
*/
#ifndef _LINUX_MFD_MACSMC_H
#define _LINUX_MFD_MACSMC_H
#include <linux/soc/apple/rtkit.h>
/**
* typedef smc_key - Alias for u32 to be used for SMC keys
*
* SMC keys are 32bit integers containing packed ASCII characters in natural
* integer order, i.e. 0xAABBCCDD, which represent the FourCC ABCD.
* The SMC driver is designed with this assumption and ensures the right
* endianness is used when these are stored to memory and sent to or received
* from the actual SMC firmware (which can be done in either shared memory or
* as 64bit mailbox message on Apple Silicon).
* Internally, SMC stores these keys in a table sorted lexicographically and
* allows resolving an index into this table to the corresponding SMC key.
* Thus, storing keys as u32 is very convenient as it allows to e.g. use
* normal comparison operators which directly map to the natural order used
* by SMC firmware.
*
* This simple type alias is introduced to allow easy recognition of SMC key
* variables and arguments.
*/
typedef u32 smc_key;
/**
* SMC_KEY - Convert FourCC SMC keys in source code to smc_key
*
* This macro can be used to easily define FourCC SMC keys in source code
* and convert these to u32 / smc_key, e.g. SMC_KEY(NTAP) will expand to
* 0x4e544150.
*
* @s: FourCC SMC key to be converted
*/
#define SMC_KEY(s) (smc_key)(_SMC_KEY(#s))
#define _SMC_KEY(s) (((s)[0] << 24) | ((s)[1] << 16) | ((s)[2] << 8) | (s)[3])
#define APPLE_SMC_READABLE BIT(7)
#define APPLE_SMC_WRITABLE BIT(6)
#define APPLE_SMC_FUNCTION BIT(4)
/**
* struct apple_smc_key_info - Information for a SMC key as returned by SMC
* @type_code: FourCC code indicating the type for this key.
* Known types:
* ch8*: ASCII string
* flag: Boolean, 1 or 0
* flt: 32-bit single-precision IEEE 754 float
* hex: Binary data
* ioft: 64bit Unsigned fixed-point intger (48.16)
* {si,ui}{8,16,32,64}: Signed/Unsigned 8-/16-/32-/64-bit integer
* @size: Size of the buffer associated with this key
* @flags: Bitfield encoding flags (APPLE_SMC_{READABLE,WRITABLE,FUNCTION})
*/
struct apple_smc_key_info {
u32 type_code;
u8 size;
u8 flags;
};
/**
* enum apple_smc_boot_stage - SMC boot stage
* @APPLE_SMC_BOOTING: SMC is booting
* @APPLE_SMC_INITIALIZED: SMC is initialized and ready to use
* @APPLE_SMC_ERROR_NO_SHMEM: Shared memory could not be initialized during boot
* @APPLE_SMC_ERROR_CRASHED: SMC has crashed
*/
enum apple_smc_boot_stage {
APPLE_SMC_BOOTING,
APPLE_SMC_INITIALIZED,
APPLE_SMC_ERROR_NO_SHMEM,
APPLE_SMC_ERROR_CRASHED
};
/**
* struct apple_smc
* @dev: Underlying device struct for the physical backend device
* @key_count: Number of available SMC keys
* @first_key: First valid SMC key
* @last_key: Last valid SMC key
* @event_handlers: Notifier call chain for events received from SMC
* @rtk: Pointer to Apple RTKit instance
* @init_done: Completion for initialization
* @boot_stage: Current boot stage of SMC
* @sram: Pointer to SRAM resource
* @sram_base: SRAM base address
* @shmem: RTKit shared memory structure for SRAM
* @msg_id: Current message id for commands, will be incremented for each command
* @atomic_mode: Flag set when atomic mode is entered
* @atomic_pending: Flag indicating pending atomic command
* @cmd_done: Completion for command execution in non-atomic mode
* @cmd_ret: Return value from SMC for last command
* @mutex: Mutex for non-atomic mode
* @lock: Spinlock for atomic mode
*/
struct apple_smc {
struct device *dev;
u32 key_count;
smc_key first_key;
smc_key last_key;
struct blocking_notifier_head event_handlers;
struct apple_rtkit *rtk;
struct completion init_done;
enum apple_smc_boot_stage boot_stage;
struct resource *sram;
void __iomem *sram_base;
struct apple_rtkit_shmem shmem;
unsigned int msg_id;
bool atomic_mode;
bool atomic_pending;
struct completion cmd_done;
u64 cmd_ret;
struct mutex mutex;
spinlock_t lock;
};
/**
* apple_smc_read - Read size bytes from given SMC key into buf
* @smc: Pointer to apple_smc struct
* @key: smc_key to be read
* @buf: Buffer into which size bytes of data will be read from SMC
* @size: Number of bytes to be read into buf
*
* Return: Zero on success, negative errno on error
*/
int apple_smc_read(struct apple_smc *smc, smc_key key, void *buf, size_t size);
/**
* apple_smc_write - Write size bytes into given SMC key from buf
* @smc: Pointer to apple_smc struct
* @key: smc_key data will be written to
* @buf: Buffer from which size bytes of data will be written to SMC
* @size: Number of bytes to be written
*
* Return: Zero on success, negative errno on error
*/
int apple_smc_write(struct apple_smc *smc, smc_key key, void *buf, size_t size);
/**
* apple_smc_enter_atomic - Enter atomic mode to be able to use apple_smc_write_atomic
* @smc: Pointer to apple_smc struct
*
* This function switches the SMC backend to atomic mode which allows the
* use of apple_smc_write_atomic while disabling *all* other functions.
* This is only used for shutdown/reboot which requires writing to a SMC
* key from atomic context.
*
* Return: Zero on success, negative errno on error
*/
int apple_smc_enter_atomic(struct apple_smc *smc);
/**
* apple_smc_write_atomic - Write size bytes into given SMC key from buf without sleeping
* @smc: Pointer to apple_smc struct
* @key: smc_key data will be written to
* @buf: Buffer from which size bytes of data will be written to SMC
* @size: Number of bytes to be written
*
* Note that this function will fail if apple_smc_enter_atomic hasn't been
* called before.
*
* Return: Zero on success, negative errno on error
*/
int apple_smc_write_atomic(struct apple_smc *smc, smc_key key, void *buf, size_t size);
/**
* apple_smc_rw - Write and then read using the given SMC key
* @smc: Pointer to apple_smc struct
* @key: smc_key data will be written to
* @wbuf: Buffer from which size bytes of data will be written to SMC
* @wsize: Number of bytes to be written
* @rbuf: Buffer to which size bytes of data will be read from SMC
* @rsize: Number of bytes to be read
*
* Return: Zero on success, negative errno on error
*/
int apple_smc_rw(struct apple_smc *smc, smc_key key, void *wbuf, size_t wsize,
void *rbuf, size_t rsize);
/**
* apple_smc_get_key_by_index - Given an index return the corresponding SMC key
* @smc: Pointer to apple_smc struct
* @index: Index to be resolved
* @key: Buffer for SMC key to be returned
*
* Return: Zero on success, negative errno on error
*/
int apple_smc_get_key_by_index(struct apple_smc *smc, int index, smc_key *key);
/**
* apple_smc_get_key_info - Get key information from SMC
* @smc: Pointer to apple_smc struct
* @key: Key to acquire information for
* @info: Pointer to struct apple_smc_key_info which will be filled
*
* Return: Zero on success, negative errno on error
*/
int apple_smc_get_key_info(struct apple_smc *smc, smc_key key, struct apple_smc_key_info *info);
/**
* apple_smc_key_exists - Check if the given SMC key exists
* @smc: Pointer to apple_smc struct
* @key: smc_key to be checked
*
* Return: True if the key exists, false otherwise
*/
static inline bool apple_smc_key_exists(struct apple_smc *smc, smc_key key)
{
return apple_smc_get_key_info(smc, key, NULL) >= 0;
}
#define APPLE_SMC_TYPE_OPS(type) \
static inline int apple_smc_read_##type(struct apple_smc *smc, smc_key key, type *p) \
{ \
int ret = apple_smc_read(smc, key, p, sizeof(*p)); \
return (ret < 0) ? ret : ((ret != sizeof(*p)) ? -EINVAL : 0); \
} \
static inline int apple_smc_write_##type(struct apple_smc *smc, smc_key key, type p) \
{ \
return apple_smc_write(smc, key, &p, sizeof(p)); \
} \
static inline int apple_smc_write_##type##_atomic(struct apple_smc *smc, smc_key key, type p) \
{ \
return apple_smc_write_atomic(smc, key, &p, sizeof(p)); \
} \
static inline int apple_smc_rw_##type(struct apple_smc *smc, smc_key key, \
type w, type *r) \
{ \
int ret = apple_smc_rw(smc, key, &w, sizeof(w), r, sizeof(*r)); \
return (ret < 0) ? ret : ((ret != sizeof(*r)) ? -EINVAL : 0); \
}
APPLE_SMC_TYPE_OPS(u64)
APPLE_SMC_TYPE_OPS(u32)
APPLE_SMC_TYPE_OPS(u16)
APPLE_SMC_TYPE_OPS(u8)
APPLE_SMC_TYPE_OPS(s64)
APPLE_SMC_TYPE_OPS(s32)
APPLE_SMC_TYPE_OPS(s16)
APPLE_SMC_TYPE_OPS(s8)
static inline int apple_smc_read_flag(struct apple_smc *smc, smc_key key, bool *flag)
{
u8 val;
int ret = apple_smc_read_u8(smc, key, &val);
if (ret < 0)
return ret;
*flag = val ? true : false;
return ret;
}
static inline int apple_smc_write_flag(struct apple_smc *smc, smc_key key, bool state)
{
return apple_smc_write_u8(smc, key, state ? 1 : 0);
}
static inline int apple_smc_write_flag_atomic(struct apple_smc *smc, smc_key key, bool state)
{
return apple_smc_write_u8_atomic(smc, key, state ? 1 : 0);
}
#endif

1
include/linux/mfd/tps6594.h
View File

@@ -19,6 +19,7 @@ enum pmic_id {
TPS6593,
LP8764,
TPS65224,
TPS652G1,
};
/* Macro to get page index from register address */