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    Subject[PATCH 4.9 037/117] ARM: dts: imx6sx: Specify IMX6SX_CLK_IPG as "ahb" clock to SDMA
    Date
    [ Upstream commit cc839d0f8c284fcb7591780b568f13415bbb737c ]

    Since 25aaa75df1e6 SDMA driver uses clock rates of "ipg" and "ahb"
    clock to determine if it needs to configure the IP block as operating
    at 1:1 or 1:2 clock ratio (ACR bit in SDMAARM_CONFIG). Specifying both
    clocks as IMX6SL_CLK_SDMA results in driver incorrectly thinking that
    ratio is 1:1 which results in broken SDMA funtionality. Fix the code
    to specify IMX6SL_CLK_AHB as "ahb" clock for SDMA, to avoid detecting
    incorrect clock ratio.

    Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
    Cc: Angus Ainslie (Purism) <angus@akkea.ca>
    Cc: Chris Healy <cphealy@gmail.com>
    Cc: Lucas Stach <l.stach@pengutronix.de>
    Cc: Fabio Estevam <fabio.estevam@nxp.com>
    Cc: Shawn Guo <shawnguo@kernel.org>
    Cc: linux-arm-kernel@lists.infradead.org
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: Shawn Guo <shawnguo@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/arm/boot/dts/imx6sl.dtsi | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/arch/arm/boot/dts/imx6sl.dtsi b/arch/arm/boot/dts/imx6sl.dtsi
    index 02378db3f5fc..a2c76797e871 100644
    --- a/arch/arm/boot/dts/imx6sl.dtsi
    +++ b/arch/arm/boot/dts/imx6sl.dtsi
    @@ -704,7 +704,7 @@
    reg = <0x020ec000 0x4000>;
    interrupts = <0 2 IRQ_TYPE_LEVEL_HIGH>;
    clocks = <&clks IMX6SL_CLK_SDMA>,
    - <&clks IMX6SL_CLK_SDMA>;
    + <&clks IMX6SL_CLK_AHB>;
    clock-names = "ipg", "ahb";
    #dma-cells = <3>;
    /* imx6sl reuses imx6q sdma firmware */
    --
    2.20.1


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