pwm: pwm-ti*: Get the clock from the PWMSS parent when using old bindings
When using the old eCAP and ePWM bindings for AM335x and AM437x the clock
can be retrieved from the PWMSS parent. Newer bindings will insure that
this clock is provided via device tree.
Therefore, update this driver to support the newer and older bindings. In
the case of the older binding being used give a warning.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
[thierry.reding@gmail.com: rewrite slightly for readability]
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index 6a41e66..c791720 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -426,6 +426,7 @@
};
static const struct of_device_id ehrpwm_of_match[] = {
+ { .compatible = "ti,am3352-ehrpwm" },
{ .compatible = "ti,am33xx-ehrpwm" },
{},
};
@@ -433,6 +434,7 @@
static int ehrpwm_pwm_probe(struct platform_device *pdev)
{
+ struct device_node *np = pdev->dev.of_node;
int ret;
struct resource *r;
struct clk *clk;
@@ -445,6 +447,13 @@
clk = devm_clk_get(&pdev->dev, "fck");
if (IS_ERR(clk)) {
+ if (of_device_is_compatible(np, "ti,am33xx-ecap")) {
+ dev_warn(&pdev->dev, "Binding is obsolete.\n");
+ clk = devm_clk_get(pdev->dev.parent, "fck");
+ }
+ }
+
+ if (IS_ERR(clk)) {
dev_err(&pdev->dev, "failed to get clock\n");
return PTR_ERR(clk);
}