path: root/Documentation/devicetree/bindings
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authorAnson Huang <anson.huang@nxp.com>2018-12-19 05:24:58 +0000
committerThierry Reding <thierry.reding@gmail.com>2018-12-24 12:06:56 +0100
commit9f4c8f9607c3147d291b70c13dd01c738ed41faf (patch)
tree6fc107417a425b3a0f55f516ee12c0017daa2198 /Documentation/devicetree/bindings
parentpwm: clps711x: Switch to SPDX identifier (diff)
pwm: imx: Add ipg clock operation
i.MX PWM module's ipg_clk_s is for PWM register access, on most of i.MX SoCs, this ipg_clk_s is from system ipg clock or perclk which is always enabled, but on i.MX7D, the ipg_clk_s is from PWM1_CLK_ROOT which is controlled by CCGR132, that means the CCGR132 MUST be enabled first before accessing PWM registers on i.MX7D. This patch adds ipg clock operation to make sure register access successfully on i.MX7D and it fixes Linux kernel boot up hang during PWM driver probe. Fixes: 4a23e6ee9f69 ("ARM: dts: imx7d-sdb: Restore pwm backlight support") Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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