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

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>

diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
index e1f87fbfe5542b3190b49c5f2ffb283af23a343c..975bef529854af9f4599cf300a653725049b9f95 100644 (file)
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -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