[PATCH] pwm: tiehrpwm: handle deferred probe with dev_err_probe()

From: Grygorii Strashko
Date: Fri Oct 30 2020 - 16:13:20 EST


The devm_clk_get() may return -EPROBE_DEFER which is not handled properly
by TI EHRPWM driver and causes unnecessary boot log messages.

Hence, add proper deferred probe handling with new dev_err_probe() API.

Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
---
drivers/pwm/pwm-tiehrpwm.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/pwm/pwm-tiehrpwm.c b/drivers/pwm/pwm-tiehrpwm.c
index 0846917ff2d2..14c8fdcfd607 100644
--- a/drivers/pwm/pwm-tiehrpwm.c
+++ b/drivers/pwm/pwm-tiehrpwm.c
@@ -437,10 +437,8 @@ static int ehrpwm_pwm_probe(struct platform_device *pdev)
}
}

- if (IS_ERR(clk)) {
- dev_err(&pdev->dev, "failed to get clock\n");
- return PTR_ERR(clk);
- }
+ if (IS_ERR(clk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(clk), "Failed to get fck\n");

pc->clk_rate = clk_get_rate(clk);
if (!pc->clk_rate) {
@@ -462,10 +460,8 @@ static int ehrpwm_pwm_probe(struct platform_device *pdev)

/* Acquire tbclk for Time Base EHRPWM submodule */
pc->tbclk = devm_clk_get(&pdev->dev, "tbclk");
- if (IS_ERR(pc->tbclk)) {
- dev_err(&pdev->dev, "Failed to get tbclk\n");
- return PTR_ERR(pc->tbclk);
- }
+ if (IS_ERR(pc->tbclk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(pc->tbclk), "Failed to get tbclk\n");

ret = clk_prepare(pc->tbclk);
if (ret < 0) {
--
2.17.1