1 // SPDX-License-Identifier: GPL-2.0-only
6 #include <linux/clk.h>
18 	struct clk *clk;  member
37 	c = clk_get_rate(lpc32xx->clk);  in lpc32xx_pwm_config()
43 		return -ERANGE;  in lpc32xx_pwm_config()
48 	duty_cycles = div64_u64((unsigned long long)(period_ns - duty_ns) * 256,  in lpc32xx_pwm_config()
55 	val = readl(lpc32xx->base);  in lpc32xx_pwm_config()
58 	writel(val, lpc32xx->base);  in lpc32xx_pwm_config()
69 	ret = clk_prepare_enable(lpc32xx->clk);  in lpc32xx_pwm_enable()
73 	val = readl(lpc32xx->base);  in lpc32xx_pwm_enable()
75 	writel(val, lpc32xx->base);  in lpc32xx_pwm_enable()
85 	val = readl(lpc32xx->base);  in lpc32xx_pwm_disable()
87 	writel(val, lpc32xx->base);  in lpc32xx_pwm_disable()
89 	clk_disable_unprepare(lpc32xx->clk);  in lpc32xx_pwm_disable()
97 	if (state->polarity != PWM_POLARITY_NORMAL)  in lpc32xx_pwm_apply()
98 		return -EINVAL;  in lpc32xx_pwm_apply()
100 	if (!state->enabled) {  in lpc32xx_pwm_apply()
101 		if (pwm->state.enabled)  in lpc32xx_pwm_apply()
107 	err = lpc32xx_pwm_config(chip, pwm, state->duty_cycle, state->period);  in lpc32xx_pwm_apply()
111 	if (!pwm->state.enabled)  in lpc32xx_pwm_apply()
128 	chip = devm_pwmchip_alloc(&pdev->dev, 1, sizeof(*lpc32xx));  in lpc32xx_pwm_probe()
133 	lpc32xx->base = devm_platform_ioremap_resource(pdev, 0);  in lpc32xx_pwm_probe()
134 	if (IS_ERR(lpc32xx->base))  in lpc32xx_pwm_probe()
135 		return PTR_ERR(lpc32xx->base);  in lpc32xx_pwm_probe()
137 	lpc32xx->clk = devm_clk_get(&pdev->dev, NULL);  in lpc32xx_pwm_probe()
138 	if (IS_ERR(lpc32xx->clk))  in lpc32xx_pwm_probe()
139 		return PTR_ERR(lpc32xx->clk);  in lpc32xx_pwm_probe()
141 	chip->ops = &lpc32xx_pwm_ops;  in lpc32xx_pwm_probe()
144 	val = readl(lpc32xx->base);  in lpc32xx_pwm_probe()
146 	writel(val, lpc32xx->base);  in lpc32xx_pwm_probe()
148 	ret = devm_pwmchip_add(&pdev->dev, chip);  in lpc32xx_pwm_probe()
150 		dev_err(&pdev->dev, "failed to add PWM chip, error %d\n", ret);  in lpc32xx_pwm_probe()
158 	{ .compatible = "nxp,lpc3220-pwm", },
165 		.name = "lpc32xx-pwm",
172 MODULE_ALIAS("platform:lpc32xx-pwm");