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From: dillon.minfei@gmail.com
To: robh+dt@kernel.org, p.zabel@pengutronix.de,
	mcoquelin.stm32@gmail.com, alexandre.torgue@st.com,
	thierry.reding@gmail.com, sam@ravnborg.org, airlied@linux.ie,
	daniel@ffwll.ch, mturquette@baylibre.com, sboyd@kernel.org,
	andy.shevchenko@gmail.com, noralf@tronnes.org,
	linus.walleij@linaro.org, broonie@kernel.org
Cc: devicetree@vger.kernel.org, dillonhua@gmail.com,
	linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
	dri-devel@lists.freedesktop.org, linux-spi@vger.kernel.org,
	dillon min <dillon.minfei@gmail.com>,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 6/9] clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after kernel startup
Date: Wed, 27 May 2020 15:27:30 +0800	[thread overview]
Message-ID: <1590564453-24499-7-git-send-email-dillon.minfei@gmail.com> (raw)
In-Reply-To: <1590564453-24499-1-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.

Fixes: daf2d117cbca ("clk: stm32f4: Add lcd-tft clock")
Signed-off-by: dillon min <dillon.minfei@gmail.com>
---

Changes since V5:
separate '[PATCH v5 5/8]' to two, add Fixes tags.

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

diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c
index 42ca2dd86aea..fa62e990c539 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 = {
-- 
2.7.4


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  parent reply	other threads:[~2020-05-27  7:29 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-27  7:27 [PATCH v6 0/9] Enable ili9341 and l3gd20 on stm32f429-disco dillon.minfei
2020-05-27  7:27 ` [PATCH v6 1/9] ARM: dts: stm32: Add dma config for spi5 dillon.minfei
2020-05-27  7:27 ` [PATCH v6 2/9] ARM: dts: stm32: Add pin map for ltdc & spi5 on stm32f429-disco board dillon.minfei
2020-06-15  9:45   ` Alexandre Torgue
2020-06-15 10:05     ` dillon min
2020-05-27  7:27 ` [PATCH v6 3/9] ARM: dts: stm32: enable ltdc binding with ili9341, gyro l3gd20 on stm32429-disco board dillon.minfei
2020-05-27  7:27 ` [PATCH v6 4/9] dt-bindings: display: panel: Add ilitek ili9341 panel bindings dillon.minfei
2020-05-29 16:17   ` Rob Herring
2020-05-27  7:27 ` [PATCH v6 5/9] clk: stm32: Fix stm32f429's ltdc driver hang in set clock rate dillon.minfei
2020-05-27  8:35   ` Stephen Boyd
2021-03-10 11:43     ` dillon min
2020-05-27  7:27 ` dillon.minfei [this message]
2020-05-27  8:35   ` [PATCH v6 6/9] clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after kernel startup Stephen Boyd
2021-03-10 11:43     ` dillon min
2020-05-27  7:27 ` [PATCH v6 7/9] drm/panel: Add ilitek ili9341 panel driver dillon.minfei
2020-05-27  7:27 ` [PATCH v6 8/9] spi: stm32: Add 'SPI_SIMPLEX_RX', 'SPI_3WIRE_RX' support for stm32f4 dillon.minfei
2020-05-27  9:51   ` Mark Brown
2020-05-27 10:45     ` dillon min
2020-05-27 11:18       ` Mark Brown
2020-05-27  7:27 ` [PATCH v6 9/9] spi: flags 'SPI_CONTROLLER_MUST_RX' and 'SPI_CONTROLLER_MUST_TX' can't be coexit with 'SPI_3WIRE' mode dillon.minfei
2020-06-15  8:49 ` [PATCH v6 0/9] Enable ili9341 and l3gd20 on stm32f429-disco Alexandre Torgue

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