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tty: serial: imx: Add missing wakeup event reporting

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Current imx uart wakeup event would not report itself as wakeup source
through sysfs. Add pm_wakeup_event() to support it.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20251002045259.2725461-3-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sherry Sun
2025-10-02 12:52:59 +08:00
committed by Greg Kroah-Hartman
parent d55f3d2375
commit 0cfadf4bcd
1 changed files with 9 additions and 3 deletions
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12
drivers/tty/serial/imx.c
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@@ -30,7 +30,7 @@
#include <linux/iopoll.h>
#include <linux/dma-mapping.h>
#include <asm/irq.h>
#include <linux/irq.h>
#include <linux/dma/imx-dma.h>
#include "serial_mctrl_gpio.h"
@@ -2699,8 +2699,8 @@ static void imx_uart_enable_wakeup(struct imx_port *sport, bool on)
{
struct tty_port *port = &sport->port.state->port;
struct device *tty_dev;
bool may_wake = false;
u32 ucr3;
bool may_wake = false, wake_active = false;
u32 ucr3, usr1;
scoped_guard(tty_port_tty, port) {
struct tty_struct *tty = scoped_tty();
@@ -2715,12 +2715,14 @@ static void imx_uart_enable_wakeup(struct imx_port *sport, bool on)
uart_port_lock_irq(&sport->port);
usr1 = imx_uart_readl(sport, USR1);
ucr3 = imx_uart_readl(sport, UCR3);
if (on) {
imx_uart_writel(sport, USR1_AWAKE, USR1);
ucr3 |= UCR3_AWAKEN;
} else {
ucr3 &= ~UCR3_AWAKEN;
wake_active = usr1 & USR1_AWAKE;
}
imx_uart_writel(sport, ucr3, UCR3);
@@ -2731,10 +2733,14 @@ static void imx_uart_enable_wakeup(struct imx_port *sport, bool on)
ucr1 |= UCR1_RTSDEN;
} else {
ucr1 &= ~UCR1_RTSDEN;
wake_active = wake_active || (usr1 & USR1_RTSD);
}
imx_uart_writel(sport, ucr1, UCR1);
}
if (wake_active && irqd_is_wakeup_set(irq_get_irq_data(sport->port.irq)))
pm_wakeup_event(tty_port_tty_get(port)->dev, 0);
uart_port_unlock_irq(&sport->port);
}