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pwm: pxa: Add optional bus clock

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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 <dlan@kernel.org>
Link: https://patch.msgid.link/20260428-03-k3-pwm-drv-v2-2-a532bbe45556@kernel.org
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
This commit is contained in:
Yixun Lan 2026-04-28 10:46:51 +00:00 committed by Uwe Kleine-König
parent e7abbff5e8
commit 74bca0f2d3
1 changed files with 7 additions and 1 deletions
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8
drivers/pwm/pwm-pxa.c
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@ -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");