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Message-Id: <20220124184141.704984135@linuxfoundation.org>
Date: Mon, 24 Jan 2022 19:37:58 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Dillon Min <dillon.minfei@...il.com>,
Patrice Chotard <patrice.chotard@...s.st.com>,
Gabriel Fernandez <gabriel.fernandez@...s.st.com>,
Stephen Boyd <sboyd@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 0489/1039] clk: stm32: Fix ltdcs clock turn off by clk_disable_unused() after system enter shell
From: Dillon Min <dillon.minfei@...il.com>
[ 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@gmail.com/
Link: https://lore.kernel.org/lkml/CAPTRvHkf0cK_4ZidM17rPo99gWDmxgqFt4CDUjqFFwkOeQeFDg@mail.gmail.com/
Signed-off-by: Dillon Min <dillon.minfei@...il.com>
Reviewed-by: Patrice Chotard <patrice.chotard@...s.st.com>
Acked-by: Gabriel Fernandez <gabriel.fernandez@...s.st.com>
Acked-by: Stephen Boyd <sboyd@...nel.org>
Link: https://lore.kernel.org/r/1635232282-3992-10-git-send-email-dillon.minfei@gmail.com
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
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 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" },
};
--
2.34.1
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