[34/37] clk: bcm: rpi: Add disp clock

Commit Message

Dave Stevenson Oct. 23, 2024, 4:50 p.m. UTC

From: Maxime Ripard <[e-mail]>

BCM2712 has an extra clock exposed by the firmware called DISP, and used
by (at least) the HVS. Let's add it to the list of clocks to register in
Linux.

Signed-off-by: Maxime Ripard <[e-mail]>
Signed-off-by: Dave Stevenson <[e-mail]>
---
 drivers/clk/bcm/clk-raspberrypi.c          | 5 +++++
 include/soc/bcm2835/raspberrypi-firmware.h | 1 +
 2 files changed, 6 insertions(+)

Comments

Stephen Boyd Nov. 21, 2024, 10:47 p.m. UTC | #1

Quoting Dave Stevenson (2024-10-23 09:50:31)
> From: Maxime Ripard <[e-mail]>
> 
> BCM2712 has an extra clock exposed by the firmware called DISP, and used
> by (at least) the HVS. Let's add it to the list of clocks to register in
> Linux.
> 
> Signed-off-by: Maxime Ripard <[e-mail]>
> Signed-off-by: Dave Stevenson <[e-mail]>
> ---

Acked-by: Stephen Boyd <[e-mail]>

Patch

diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
index 89e2c0241ff6..aff9f3195573 100644
--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -34,6 +34,7 @@  static char *rpi_firmware_clk_names[] = {
 	[RPI_FIRMWARE_M2MC_CLK_ID]	= "m2mc",
 	[RPI_FIRMWARE_PIXEL_BVB_CLK_ID]	= "pixel-bvb",
 	[RPI_FIRMWARE_VEC_CLK_ID]	= "vec",
+	[RPI_FIRMWARE_DISP_CLK_ID]	= "disp",
 };
 
 #define RPI_FIRMWARE_STATE_ENABLE_BIT	BIT(0)
@@ -139,6 +140,10 @@  raspberrypi_clk_variants[RPI_FIRMWARE_NUM_CLK_ID] = {
 		.export = true,
 		.minimize = true,
 	},
+	[RPI_FIRMWARE_DISP_CLK_ID] = {
+		.export = true,
+		.minimize = true,
+	},
 };
 
 /*
diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
index 73cac8d0287e..e1f87fbfe554 100644
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -152,6 +152,7 @@  enum rpi_firmware_clk_id {
 	RPI_FIRMWARE_M2MC_CLK_ID,
 	RPI_FIRMWARE_PIXEL_BVB_CLK_ID,
 	RPI_FIRMWARE_VEC_CLK_ID,
+	RPI_FIRMWARE_DISP_CLK_ID,
 	RPI_FIRMWARE_NUM_CLK_ID,
 };