From: Yixun Lan Date: Tue, 28 Apr 2026 10:46:51 +0000 (+0000) Subject: pwm: pxa: Add optional bus clock X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=74bca0f2d37f5fd9a4bd5378d9f9579e72038556;p=thirdparty%2Fkernel%2Flinux.git pwm: pxa: Add optional bus clock Add one secondary optional bus clock for the PWM PXA driver, also keep it compatible with old single clock. The SpacemiT K3 SoC require a bus clock for PWM controller, acquire and enable it during probe phase. Signed-off-by: Yixun Lan Link: https://patch.msgid.link/20260428-03-k3-pwm-drv-v2-2-a532bbe45556@kernel.org Signed-off-by: Uwe Kleine-König --- diff --git a/drivers/pwm/pwm-pxa.c b/drivers/pwm/pwm-pxa.c index 0f5bdb0e395ea..80d2fa10919f8 100644 --- a/drivers/pwm/pwm-pxa.c +++ b/drivers/pwm/pwm-pxa.c @@ -161,6 +161,7 @@ static int pwm_probe(struct platform_device *pdev) const struct platform_device_id *id = platform_get_device_id(pdev); struct pwm_chip *chip; struct pxa_pwm_chip *pc; + struct clk *bus_clk; struct device *dev = &pdev->dev; struct reset_control *rst; int ret = 0; @@ -177,7 +178,12 @@ static int pwm_probe(struct platform_device *pdev) return PTR_ERR(chip); pc = to_pxa_pwm_chip(chip); - pc->clk = devm_clk_get(dev, NULL); + bus_clk = devm_clk_get_optional_enabled(dev, "bus"); + if (IS_ERR(bus_clk)) + return dev_err_probe(dev, PTR_ERR(bus_clk), "Failed to get bus clock\n"); + + /* Get named func clk if bus clock is valid */ + pc->clk = devm_clk_get(dev, bus_clk ? "func" : NULL); if (IS_ERR(pc->clk)) return dev_err_probe(dev, PTR_ERR(pc->clk), "Failed to get clock\n");