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Subject: Re: [PATCH v6 6/9] clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after kernel startup
From:   Stephen Boyd <sboyd@kernel.org>
Cc:     devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
        dri-devel@lists.freedesktop.org, linux-clk@vger.kernel.org,
        dillonhua@gmail.com, dillon min <dillon.minfei@gmail.com>
To:     airlied@linux.ie, alexandre.torgue@st.com,
        andy.shevchenko@gmail.com, broonie@kernel.org, daniel@ffwll.ch,
        dillon.minfei@gmail.com, linus.walleij@linaro.org,
        mcoquelin.stm32@gmail.com, mturquette@baylibre.com,
        noralf@tronnes.org, p.zabel@pengutronix.de, robh+dt@kernel.org,
        sam@ravnborg.org, thierry.reding@gmail.com
Date:   Wed, 27 May 2020 01:35:08 -0700
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Quoting dillon.minfei@gmail.com (2020-05-27 00:27:30)
> From: dillon min <dillon.minfei@gmail.com>
>=20
> stm32's clk driver register two ltdc gate clk to clk core by
> clk_hw_register_gate() and clk_hw_register_composite()
>=20
> 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
>=20
> 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.
>=20
> Fixes: daf2d117cbca ("clk: stm32f4: Add lcd-tft clock")
> Signed-off-by: dillon min <dillon.minfei@gmail.com>
> ---

Acked-by: Stephen Boyd <sboyd@kernel.org>