1 From 100ab3d575481bfebeb60b8afff51795cfe72bde Mon Sep 17 00:00:00 2001
2 From: Andrey Smirnov <andrew.smirnov@gmail.com>
3 Date: Thu, 28 Mar 2019 23:49:22 -0700
4 Subject: ARM: dts: imx53: Specify IMX5_CLK_IPG as "ahb" clock to SDMA
6 [ Upstream commit 28c168018e0902c67eb9c60d0fc4c8aa166c4efe ]
8 Since 25aaa75df1e6 SDMA driver uses clock rates of "ipg" and "ahb"
9 clock to determine if it needs to configure the IP block as operating
10 at 1:1 or 1:2 clock ratio (ACR bit in SDMAARM_CONFIG). Specifying both
11 clocks as IMX5_CLK_SDMA results in driver incorrectly thinking that
12 ratio is 1:1 which results in broken SDMA funtionality. Fix the code
13 to specify IMX5_CLK_AHB as "ahb" clock for SDMA, to avoid detecting
14 incorrect clock ratio.
16 Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
17 Cc: Angus Ainslie (Purism) <angus@akkea.ca>
18 Cc: Chris Healy <cphealy@gmail.com>
19 Cc: Lucas Stach <l.stach@pengutronix.de>
20 Cc: Fabio Estevam <fabio.estevam@nxp.com>
21 Cc: Shawn Guo <shawnguo@kernel.org>
22 Cc: linux-arm-kernel@lists.infradead.org
23 Cc: linux-kernel@vger.kernel.org
24 Signed-off-by: Shawn Guo <shawnguo@kernel.org>
25 Signed-off-by: Sasha Levin <sashal@kernel.org>
27 arch/arm/boot/dts/imx53.dtsi | 2 +-
28 1 file changed, 1 insertion(+), 1 deletion(-)
30 diff --git a/arch/arm/boot/dts/imx53.dtsi b/arch/arm/boot/dts/imx53.dtsi
31 index 6386185ae234..b6b0818343c4 100644
32 --- a/arch/arm/boot/dts/imx53.dtsi
33 +++ b/arch/arm/boot/dts/imx53.dtsi
35 reg = <0x63fb0000 0x4000>;
37 clocks = <&clks IMX5_CLK_SDMA_GATE>,
38 - <&clks IMX5_CLK_SDMA_GATE>;
39 + <&clks IMX5_CLK_AHB>;
40 clock-names = "ipg", "ahb";
42 fsl,sdma-ram-script-name = "imx/sdma/sdma-imx53.bin";