From: Shawn Guo <shawnguo@kernel.org>
To: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Angus Ainslie <angus@akkea.ca>,
linux-kernel@vger.kernel.org, Chris Healy <cphealy@gmail.com>,
Fabio Estevam <fabio.estevam@nxp.com>,
linux-arm-kernel@lists.infradead.org,
Lucas Stach <l.stach@pengutronix.de>
Subject: Re: [PATCH v3 1/9] ARM: dts: imx6qdl: Specify IMX6QDL_CLK_IPG as "ipg" clock to SDMA
Date: Thu, 11 Apr 2019 10:30:09 +0800 [thread overview]
Message-ID: <20190411023008.GK26817@dragon> (raw)
In-Reply-To: <20190329064924.8728-1-andrew.smirnov@gmail.com>
On Thu, Mar 28, 2019 at 11:49:16PM -0700, Andrey Smirnov wrote:
> 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 IMX6QDL_CLK_SDMA results in driver incorrectly thinking that
> ratio is 1:1 which results in broken SDMA funtionality(this at least
> breaks RAVE SP serdev driver on RDU2). Fix the code to specify
> IMX6QDL_CLK_IPG as "ipg" clock for SDMA, to avoid detecting incorrect
> clock ratio.
>
> Fixes: 25aaa75df1e6 ("dmaengine: imx-sdma: add clock ratio 1:1 check")
Since we have a fix in the dma driver, I dropped the Fixes tag here.
Applied all, thanks.
Shawn
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
> 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
> ---
> arch/arm/boot/dts/imx6qdl.dtsi | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
> index 9f9aa6e7ed0e..354feba077b2 100644
> --- a/arch/arm/boot/dts/imx6qdl.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl.dtsi
> @@ -949,7 +949,7 @@
> compatible = "fsl,imx6q-sdma", "fsl,imx35-sdma";
> reg = <0x020ec000 0x4000>;
> interrupts = <0 2 IRQ_TYPE_LEVEL_HIGH>;
> - clocks = <&clks IMX6QDL_CLK_SDMA>,
> + clocks = <&clks IMX6QDL_CLK_IPG>,
> <&clks IMX6QDL_CLK_SDMA>;
> clock-names = "ipg", "ahb";
> #dma-cells = <3>;
> --
> 2.20.1
>
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next prev parent reply other threads:[~2019-04-11 2:30 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-29 6:49 [PATCH v3 1/9] ARM: dts: imx6qdl: Specify IMX6QDL_CLK_IPG as "ipg" clock to SDMA Andrey Smirnov
2019-03-29 6:49 ` [PATCH v3 2/9] ARM: dts: imx6sx: Specify IMX6SX_CLK_IPG " Andrey Smirnov
2019-03-29 6:49 ` [PATCH v3 3/9] ARM: dts: imx7d: Specify IMX7D_CLK_IPG " Andrey Smirnov
2019-03-29 6:49 ` [PATCH v3 4/9] ARM: dts: imx6ul: Specify IMX6UL_CLK_IPG " Andrey Smirnov
2019-03-29 6:49 ` [PATCH v3 5/9] ARM: dts: imx6sll: Specify IMX6SLL_CLK_IPG " Andrey Smirnov
2019-03-29 6:49 ` [PATCH v3 6/9] ARM: dts: imx6sx: Specify IMX6SX_CLK_IPG as "ahb" " Andrey Smirnov
2019-03-29 6:49 ` [PATCH v3 7/9] ARM: dts: imx53: Specify IMX5_CLK_IPG " Andrey Smirnov
2019-03-29 6:49 ` [PATCH v3 8/9] ARM: dts: imx51: " Andrey Smirnov
2019-03-29 6:49 ` [PATCH v3 9/9] ARM: dts: imx50: " Andrey Smirnov
2019-04-10 18:47 ` [PATCH v3 1/9] ARM: dts: imx6qdl: Specify IMX6QDL_CLK_IPG as "ipg" " Adam Ford
2019-04-11 2:30 ` Shawn Guo [this message]
2019-04-20 12:14 ` Adam Ford
2019-04-20 13:33 ` Shawn Guo
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