diff mbox series

[v7,09/10] clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after system enter shell

Message ID 1635232282-3992-10-git-send-email-dillon.minfei@gmail.com (mailing list archive)
State Accepted, archived
Headers show
Series Add support for DMA2D of STMicroelectronics STM32 Soc series | expand

Commit Message

Dillon Min Oct. 26, 2021, 7:11 a.m. UTC 
stm32's clk driver register two ltdc gate clk to clk core by
clk_hw_register_gate() and clk_hw_register_composite()

first: 'stm32f429_gates[]', clk name is 'ltdc', which no user to use.
second: 'stm32f429_aux_clk[]', clk name is 'lcd-tft', used by ltdc driver

both of them point to the same offset of stm32's RCC register. after
kernel enter console, clk core turn off ltdc's clk as 'stm32f429_gates[]'
is no one to use. but, actually 'stm32f429_aux_clk[]' is in use.

stm32f469/746/769 have the same issue, fix it.

Fixes: daf2d117cbca ("clk: stm32f4: Add lcd-tft clock")
Link: https://lore.kernel.org/linux-arm-kernel/1590564453-24499-7-git-send-email-dillon.minfei@gmail.com/
Link: https://lore.kernel.org/lkml/CAPTRvHkf0cK_4ZidM17rPo99gWDmxgqFt4CDUjqFFwkOeQeFDg@mail.gmail.com/
Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Acked-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
---
v7: 
- collect acked-by, reviewed-by from Gabriel, Patrice.

 drivers/clk/clk-stm32f4.c | 4 ----
 1 file changed, 4 deletions(-)

Comments

Dillon Min Nov. 12, 2021, 2:40 a.m. UTC | #1 
Hi Stephen

Would you pick up this patch? Thanks.

Best Regards.
Dillon

On Tue, 26 Oct 2021 at 15:12, Dillon Min <dillon.minfei@gmail.com> wrote:
>
> stm32's clk driver register two ltdc gate clk to clk core by
> clk_hw_register_gate() and clk_hw_register_composite()
>
> first: 'stm32f429_gates[]', clk name is 'ltdc', which no user to use.
> second: 'stm32f429_aux_clk[]', clk name is 'lcd-tft', used by ltdc driver
>
> both of them point to the same offset of stm32's RCC register. after
> kernel enter console, clk core turn off ltdc's clk as 'stm32f429_gates[]'
> is no one to use. but, actually 'stm32f429_aux_clk[]' is in use.
>
> stm32f469/746/769 have the same issue, fix it.
>
> Fixes: daf2d117cbca ("clk: stm32f4: Add lcd-tft clock")
> Link: https://lore.kernel.org/linux-arm-kernel/1590564453-24499-7-git-send-email-dillon.minfei@gmail.com/
> Link: https://lore.kernel.org/lkml/CAPTRvHkf0cK_4ZidM17rPo99gWDmxgqFt4CDUjqFFwkOeQeFDg@mail.gmail.com/
> Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
> Acked-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
> Acked-by: Stephen Boyd <sboyd@kernel.org>
> ---
> v7:
> - collect acked-by, reviewed-by from Gabriel, Patrice.
>
>  drivers/clk/clk-stm32f4.c | 4 ----
>  1 file changed, 4 deletions(-)
>
> diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c
> index af46176ad053..473dfe632cc5 100644
> --- a/drivers/clk/clk-stm32f4.c
> +++ b/drivers/clk/clk-stm32f4.c
> @@ -129,7 +129,6 @@ static const struct stm32f4_gate_data stm32f429_gates[] __initconst = {
>         { STM32F4_RCC_APB2ENR, 20,      "spi5",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 21,      "spi6",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 22,      "sai1",         "apb2_div" },
> -       { STM32F4_RCC_APB2ENR, 26,      "ltdc",         "apb2_div" },
>  };
>
>  static const struct stm32f4_gate_data stm32f469_gates[] __initconst = {
> @@ -211,7 +210,6 @@ static const struct stm32f4_gate_data stm32f469_gates[] __initconst = {
>         { STM32F4_RCC_APB2ENR, 20,      "spi5",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 21,      "spi6",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 22,      "sai1",         "apb2_div" },
> -       { STM32F4_RCC_APB2ENR, 26,      "ltdc",         "apb2_div" },
>  };
>
>  static const struct stm32f4_gate_data stm32f746_gates[] __initconst = {
> @@ -286,7 +284,6 @@ static const struct stm32f4_gate_data stm32f746_gates[] __initconst = {
>         { STM32F4_RCC_APB2ENR, 21,      "spi6",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 22,      "sai1",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 23,      "sai2",         "apb2_div" },
> -       { STM32F4_RCC_APB2ENR, 26,      "ltdc",         "apb2_div" },
>  };
>
>  static const struct stm32f4_gate_data stm32f769_gates[] __initconst = {
> @@ -364,7 +361,6 @@ static const struct stm32f4_gate_data stm32f769_gates[] __initconst = {
>         { STM32F4_RCC_APB2ENR, 21,      "spi6",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 22,      "sai1",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 23,      "sai2",         "apb2_div" },
> -       { STM32F4_RCC_APB2ENR, 26,      "ltdc",         "apb2_div" },
>         { STM32F4_RCC_APB2ENR, 30,      "mdio",         "apb2_div" },
>  };
>
> --
> 2.7.4
>
Stephen Boyd Dec. 16, 2021, 6:45 a.m. UTC | #2 
Quoting Dillon Min (2021-10-26 00:11:21)
> stm32's clk driver register two ltdc gate clk to clk core by
> clk_hw_register_gate() and clk_hw_register_composite()
> 
> first: 'stm32f429_gates[]', clk name is 'ltdc', which no user to use.
> second: 'stm32f429_aux_clk[]', clk name is 'lcd-tft', used by ltdc driver
> 
> both of them point to the same offset of stm32's RCC register. after
> kernel enter console, clk core turn off ltdc's clk as 'stm32f429_gates[]'
> is no one to use. but, actually 'stm32f429_aux_clk[]' is in use.
> 
> stm32f469/746/769 have the same issue, fix it.
> 
> Fixes: daf2d117cbca ("clk: stm32f4: Add lcd-tft clock")
> Link: https://lore.kernel.org/linux-arm-kernel/1590564453-24499-7-git-send-email-dillon.minfei@gmail.com/
> Link: https://lore.kernel.org/lkml/CAPTRvHkf0cK_4ZidM17rPo99gWDmxgqFt4CDUjqFFwkOeQeFDg@mail.gmail.com/
> Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
> Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
> Acked-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
> Acked-by: Stephen Boyd <sboyd@kernel.org>
> ---

Applied to clk-next
Stephen Boyd Dec. 16, 2021, 6:46 a.m. UTC | #3 
Quoting Dillon Min (2021-11-11 18:40:09)
> Hi Stephen
> 
> Would you pick up this patch? Thanks.
> 

Ok.
diff mbox series

Patch

diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c
index af46176ad053..473dfe632cc5 100644
--- a/drivers/clk/clk-stm32f4.c
+++ b/drivers/clk/clk-stm32f4.c
@@ -129,7 +129,6 @@  static const struct stm32f4_gate_data stm32f429_gates[] __initconst = {
 	{ STM32F4_RCC_APB2ENR, 20,	"spi5",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 21,	"spi6",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 22,	"sai1",		"apb2_div" },
-	{ STM32F4_RCC_APB2ENR, 26,	"ltdc",		"apb2_div" },
 };
 
 static const struct stm32f4_gate_data stm32f469_gates[] __initconst = {
@@ -211,7 +210,6 @@  static const struct stm32f4_gate_data stm32f469_gates[] __initconst = {
 	{ STM32F4_RCC_APB2ENR, 20,	"spi5",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 21,	"spi6",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 22,	"sai1",		"apb2_div" },
-	{ STM32F4_RCC_APB2ENR, 26,	"ltdc",		"apb2_div" },
 };
 
 static const struct stm32f4_gate_data stm32f746_gates[] __initconst = {
@@ -286,7 +284,6 @@  static const struct stm32f4_gate_data stm32f746_gates[] __initconst = {
 	{ STM32F4_RCC_APB2ENR, 21,	"spi6",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 22,	"sai1",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 23,	"sai2",		"apb2_div" },
-	{ STM32F4_RCC_APB2ENR, 26,	"ltdc",		"apb2_div" },
 };
 
 static const struct stm32f4_gate_data stm32f769_gates[] __initconst = {
@@ -364,7 +361,6 @@  static const struct stm32f4_gate_data stm32f769_gates[] __initconst = {
 	{ STM32F4_RCC_APB2ENR, 21,	"spi6",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 22,	"sai1",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 23,	"sai2",		"apb2_div" },
-	{ STM32F4_RCC_APB2ENR, 26,	"ltdc",		"apb2_div" },
 	{ STM32F4_RCC_APB2ENR, 30,	"mdio",		"apb2_div" },
 };