queue-4.19/arm-dts-imx6qdl-specify-imx6qdl_clk_ipg-as-ipg-clock.patch

   1 From 9ab0c828c495d6d625ce63acb151810ac4bd49a7 Mon Sep 17 00:00:00 2001
   2 From: Andrey Smirnov <andrew.smirnov@gmail.com>
   3 Date: Thu, 28 Mar 2019 23:49:16 -0700
   4 Subject: ARM: dts: imx6qdl: Specify IMX6QDL_CLK_IPG as "ipg" clock to SDMA
   5
   6 [ Upstream commit b14c872eebc501b9640b04f4a152df51d6eaf2fc ]
   7
   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 IMX6QDL_CLK_SDMA results in driver incorrectly thinking that
  12 ratio is 1:1 which results in broken SDMA funtionality(this at least
  13 breaks RAVE SP serdev driver on RDU2). Fix the code to specify
  14 IMX6QDL_CLK_IPG as "ipg" clock for SDMA, to avoid detecting incorrect
  15 clock ratio.
  16
  17 Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
  18 Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
  19 Cc: Angus Ainslie (Purism) <angus@akkea.ca>
  20 Cc: Chris Healy <cphealy@gmail.com>
  21 Cc: Lucas Stach <l.stach@pengutronix.de>
  22 Cc: Fabio Estevam <fabio.estevam@nxp.com>
  23 Cc: Shawn Guo <shawnguo@kernel.org>
  24 Cc: linux-arm-kernel@lists.infradead.org
  25 Cc: linux-kernel@vger.kernel.org
  26 Tested-by: Adam Ford <aford173@gmail.com>
  27 Signed-off-by: Shawn Guo <shawnguo@kernel.org>
  28 Signed-off-by: Sasha Levin <sashal@kernel.org>
  29 ---
  30  arch/arm/boot/dts/imx6qdl.dtsi | 2 +-
  31  1 file changed, 1 insertion(+), 1 deletion(-)
  32
  33 diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
  34 index 61d2d26afbf4..00d44a60972f 100644
  35 --- a/arch/arm/boot/dts/imx6qdl.dtsi
  36 +++ b/arch/arm/boot/dts/imx6qdl.dtsi
  37 @@ -905,7 +905,7 @@
  38                                 compatible = "fsl,imx6q-sdma", "fsl,imx35-sdma";
  39                                 reg = <0x020ec000 0x4000>;
  40                                 interrupts = <0 2 IRQ_TYPE_LEVEL_HIGH>;
  41 -                               clocks = <&clks IMX6QDL_CLK_SDMA>,
  42 +                               clocks = <&clks IMX6QDL_CLK_IPG>,
  43                                          <&clks IMX6QDL_CLK_SDMA>;
  44                                 clock-names = "ipg", "ahb";
  45                                 #dma-cells = <3>;
  46 --
  47 2.20.1
  48