From ae5200d2271691b28aff8d0409fbefd4644ff507 Mon Sep 17 00:00:00 2001 From: "Cooper Jr., Franklin" Date: Tue, 3 May 2016 10:56:52 -0500 Subject: [PATCH] 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 [thierry.reding@gmail.com: rewrite slightly for readability] Signed-off-by: Thierry Reding --- drivers/pwm/pwm-tiecap.c | 9 +++++++++ drivers/pwm/pwm-tiehrpwm.c | 9 +++++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/pwm/pwm-tiecap.c b/drivers/pwm/pwm-tiecap.c index 616af764a276..0dc5b97a7524 100644 --- a/drivers/pwm/pwm-tiecap.c +++ b/drivers/pwm/pwm-tiecap.c @@ -195,6 +195,7 @@ static const struct pwm_ops ecap_pwm_ops = { }; static const struct of_device_id ecap_of_match[] = { + { .compatible = "ti,am3352-ecap" }, { .compatible = "ti,am33xx-ecap" }, {}, }; @@ -202,6 +203,7 @@ MODULE_DEVICE_TABLE(of, ecap_of_match); static int ecap_pwm_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; int ret; struct resource *r; struct clk *clk; @@ -213,6 +215,13 @@ static int ecap_pwm_probe(struct platform_device *pdev) return -ENOMEM; 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dev, "Binding is obsolete.\n"); + clk = devm_clk_get(pdev-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); diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c index 6a41e66015b6..c791720d27b0 100644 --- a/drivers/pwm/pwm-tiehrpwm.c +++ b/drivers/pwm/pwm-tiehrpwm.c @@ -426,6 +426,7 @@ static const struct pwm_ops ehrpwm_pwm_ops = { }; static const struct of_device_id ehrpwm_of_match[] = { + { .compatible = "ti,am3352-ehrpwm" }, { .compatible = "ti,am33xx-ehrpwm" }, {}, }; @@ -433,6 +434,7 @@ MODULE_DEVICE_TABLE(of, ehrpwm_of_match); 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; @@ -444,6 +446,13 @@ static int ehrpwm_pwm_probe(struct platform_device *pdev) return -ENOMEM; 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); -- 2.20.1