Patch "clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after system enter shell" has been added to the 5.16-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after system enter shell

to the 5.16-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     clk-stm32-fix-ltdc-s-clock-turn-off-by-clk_disable_u.patch
and it can be found in the queue-5.16 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 4116a8b403d836b45f8a4a5f191ce4f5aea3d07b
Author: Dillon Min <dillon.minfei@xxxxxxxxx>
Date:   Tue Oct 26 15:11:21 2021 +0800

    clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after system enter shell
    
    [ Upstream commit 6fc058a72f3b7b07fc4de6d66ad1f68951b00f6e ]
    
    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@xxxxxxxxx/
    Link: https://lore.kernel.org/lkml/CAPTRvHkf0cK_4ZidM17rPo99gWDmxgqFt4CDUjqFFwkOeQeFDg@xxxxxxxxxxxxxx/
    Signed-off-by: Dillon Min <dillon.minfei@xxxxxxxxx>
    Reviewed-by: Patrice Chotard <patrice.chotard@xxxxxxxxxxx>
    Acked-by: Gabriel Fernandez <gabriel.fernandez@xxxxxxxxxxx>
    Acked-by: Stephen Boyd <sboyd@xxxxxxxxxx>
    Link: https://lore.kernel.org/r/1635232282-3992-10-git-send-email-dillon.minfei@xxxxxxxxx
    Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c
index af46176ad0539..473dfe632cc57 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" },
 };