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From: dillon.minfei@gmail.com
To: mchehab@kernel.org, mchehab+huawei@kernel.org,
	hverkuil-cisco@xs4all.nl, ezequiel@collabora.com,
	gnurou@gmail.com, pihsun@chromium.org, mcoquelin.stm32@gmail.com,
	alexandre.torgue@foss.st.com, mturquette@baylibre.com,
	sboyd@kernel.org, robh+dt@kernel.org, gabriel.fernandez@st.com,
	gabriel.fernandez@foss.st.com
Cc: patrice.chotard@foss.st.com, hugues.fruchet@foss.st.com,
	linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org,
	devicetree@vger.kernel.org, Dillon Min <dillon.minfei@gmail.com>
Subject: [PATCH v4 7/8] clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after system enter shell
Date: Thu, 14 Oct 2021 18:25:05 +0800	[thread overview]
Message-ID: <1634207106-7632-8-git-send-email-dillon.minfei@gmail.com> (raw)
In-Reply-To: <1634207106-7632-1-git-send-email-dillon.minfei@gmail.com>

From: Dillon Min <dillon.minfei@gmail.com>

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")
Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
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>
---
v4: no change.

 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


  parent reply	other threads:[~2021-10-14 10:26 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-14 10:24 [PATCH v4 0/8] Add support for DMA2D of STMicroelectronics STM32 Soc series dillon.minfei
2021-10-14 10:24 ` [PATCH v4 1/8] media: admin-guide: add stm32-dma2d description dillon.minfei
2021-10-14 10:25 ` [PATCH v4 2/8] media: dt-bindings: media: add document for STM32 DMA2d bindings dillon.minfei
2021-10-14 10:25 ` [PATCH v4 3/8] ARM: dts: stm32: Add DMA2D support for STM32F429 series soc dillon.minfei
2021-10-14 10:25 ` [PATCH v4 4/8] ARM: dts: stm32: Enable DMA2D on STM32F469-DISCO board dillon.minfei
2021-10-14 10:25 ` [PATCH v4 5/8] media: v4l2-mem2mem: add v4l2_m2m_get_unmapped_area for no-mmu platform dillon.minfei
2021-10-14 10:25 ` [PATCH v4 6/8] media: v4l2-ctrls: Add RGB color effects control dillon.minfei
2021-10-14 10:43   ` Hans Verkuil
2021-10-14 10:53     ` Dillon Min
2021-10-14 11:22       ` Hans Verkuil
2021-10-14 14:00         ` Dillon Min
2021-10-14 10:25 ` dillon.minfei [this message]
2021-10-14 10:25 ` [PATCH v4 8/8] media: stm32-dma2d: STM32 DMA2D driver dillon.minfei
2021-10-14 10:45   ` Hans Verkuil
2021-10-14 11:01     ` Dillon Min
2021-10-14 11:02 ` [PATCH v4 0/8] Add support for DMA2D of STMicroelectronics STM32 Soc series Hans Verkuil
2021-10-14 11:08   ` Dillon Min
2021-10-14 11:14     ` Hans Verkuil
2021-10-14 14:09       ` Dillon Min
2021-10-15 13:12       ` Dillon Min

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