[v4,3/3] clk: bcm: rpi: Add support for VEC clock

Commit Message

Ivan T . Ivanov April 28, 2022, 6:57 a.m. UTC

From: Dom Cobley <[e-mail]>

Platform driver clk-bcm2835 gets an inaccurate clock for VEC (107MHz).
Export VEC clock trough clk-raspberrypi which uses the right PLL to
get an accurate 108MHz.

Signed-off-by: Dom Cobley <[e-mail]>
[iivanov: Adapted on top of v5.17-rc6]
Signed-off-by: Ivan T. Ivanov <[e-mail]>
---
 drivers/clk/bcm/clk-raspberrypi.c | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Maxime Ripard April 28, 2022, 8:03 a.m. UTC | #1

On Thu, Apr 28, 2022 at 09:57:43AM +0300, Ivan T. Ivanov wrote:
> From: Dom Cobley <[e-mail]>
> 
> Platform driver clk-bcm2835 gets an inaccurate clock for VEC (107MHz).
> Export VEC clock trough clk-raspberrypi which uses the right PLL to
> get an accurate 108MHz.
> 
> Signed-off-by: Dom Cobley <[e-mail]>
> [iivanov: Adapted on top of v5.17-rc6]
> Signed-off-by: Ivan T. Ivanov <[e-mail]>

Acked-by: Maxime Ripard <[e-mail]>

Maxime

Patch

diff --git a/drivers/clk/bcm/clk-raspberrypi.c b/drivers/clk/bcm/clk-raspberrypi.c
index 530820d13104..d1dd01580573 100644
--- a/drivers/clk/bcm/clk-raspberrypi.c
+++ b/drivers/clk/bcm/clk-raspberrypi.c
@@ -33,6 +33,7 @@  enum rpi_firmware_clk_id {
 	RPI_FIRMWARE_EMMC2_CLK_ID,
 	RPI_FIRMWARE_M2MC_CLK_ID,
 	RPI_FIRMWARE_PIXEL_BVB_CLK_ID,
+	RPI_FIRMWARE_VEC_CLK_ID,
 	RPI_FIRMWARE_NUM_CLK_ID,
 };
 
@@ -51,6 +52,7 @@  static char *rpi_firmware_clk_names[] = {
 	[RPI_FIRMWARE_EMMC2_CLK_ID]	= "emmc2",
 	[RPI_FIRMWARE_M2MC_CLK_ID]	= "m2mc",
 	[RPI_FIRMWARE_PIXEL_BVB_CLK_ID]	= "pixel-bvb",
+	[RPI_FIRMWARE_VEC_CLK_ID]	= "vec",
 };
 
 #define RPI_FIRMWARE_STATE_ENABLE_BIT	BIT(0)
@@ -138,6 +140,9 @@  raspberrypi_clk_variants[RPI_FIRMWARE_NUM_CLK_ID] = {
 	[RPI_FIRMWARE_PIXEL_BVB_CLK_ID] = {
 		.export = true,
 	},
+	[RPI_FIRMWARE_VEC_CLK_ID] = {
+		.export = true,
+	},
 };
 
 /*