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soc: bcm2835: raspberrypi-firmware: Add voltage domain IDs

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Add Raspberry Pi firmware voltage domain identifiers for the mailbox
property interface.

Also add the voltage request structure used with
RPI_FIRMWARE_GET_VOLTAGE so firmware clients can share the common API
definition from the firmware header.

Signed-off-by: Shubham Chakraborty <chakrabortyshubham66@gmail.com>
Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://lore.kernel.org/r/20260517080445.103962-2-chakrabortyshubham66@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Shubham Chakraborty
2026-05-17 13:34:43 +05:30
committed by Guenter Roeck
parent 582b6e87dc
commit 3b7f59ffac
1 changed files with 25 additions and 0 deletions
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25
include/soc/bcm2835/raspberrypi-firmware.h
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@@ -156,6 +156,31 @@ enum rpi_firmware_clk_id {
RPI_FIRMWARE_NUM_CLK_ID,
};
enum rpi_firmware_volt_id {
RPI_FIRMWARE_VOLT_ID_CORE = 1,
RPI_FIRMWARE_VOLT_ID_SDRAM_C = 2,
RPI_FIRMWARE_VOLT_ID_SDRAM_P = 3,
RPI_FIRMWARE_VOLT_ID_SDRAM_I = 4,
RPI_FIRMWARE_NUM_VOLT_ID,
};
/**
* struct rpi_firmware_get_voltage_request - Firmware request for a voltage
* @id: ID of the voltage being queried
* @value: Voltage in microvolts. Set by the firmware.
*
* Used by @RPI_FIRMWARE_GET_VOLTAGE.
*/
struct rpi_firmware_get_voltage_request {
__le32 id;
__le32 value;
} __packed;
#define RPI_FIRMWARE_GET_VOLTAGE_REQUEST(_id) \
{ \
.id = cpu_to_le32(_id), \
}
/**
* struct rpi_firmware_clk_rate_request - Firmware Request for a rate
* @id: ID of the clock being queried