2  * Marvell Berlin PWM driver
18 #include <linux/pwm.h>
72 static int berlin_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm)  in berlin_pwm_request()  argument
80 	return pwm_set_chip_data(pwm, channel);  in berlin_pwm_request()
83 static void berlin_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)  in berlin_pwm_free()  argument
85 	struct berlin_pwm_channel *channel = pwm_get_chip_data(pwm);  in berlin_pwm_free()
93 	struct berlin_pwm_chip *pwm = to_berlin_pwm_chip(chip);  in berlin_pwm_config()  local
98 	cycles = clk_get_rate(pwm->clk);  in berlin_pwm_config()
115 	value = berlin_pwm_readl(pwm, pwm_dev->hwpwm, BERLIN_PWM_CONTROL);  in berlin_pwm_config()
120 	berlin_pwm_writel(pwm, pwm_dev->hwpwm, value, BERLIN_PWM_CONTROL);  in berlin_pwm_config()
122 	berlin_pwm_writel(pwm, pwm_dev->hwpwm, duty, BERLIN_PWM_DUTY);  in berlin_pwm_config()
123 	berlin_pwm_writel(pwm, pwm_dev->hwpwm, period, BERLIN_PWM_TCNT);  in berlin_pwm_config()
132 	struct berlin_pwm_chip *pwm = to_berlin_pwm_chip(chip);  in berlin_pwm_set_polarity()  local
135 	value = berlin_pwm_readl(pwm, pwm_dev->hwpwm, BERLIN_PWM_CONTROL);  in berlin_pwm_set_polarity()
142 	berlin_pwm_writel(pwm, pwm_dev->hwpwm, value, BERLIN_PWM_CONTROL);  in berlin_pwm_set_polarity()
149 	struct berlin_pwm_chip *pwm = to_berlin_pwm_chip(chip);  in berlin_pwm_enable()  local
152 	value = berlin_pwm_readl(pwm, pwm_dev->hwpwm, BERLIN_PWM_EN);  in berlin_pwm_enable()
154 	berlin_pwm_writel(pwm, pwm_dev->hwpwm, value, BERLIN_PWM_EN);  in berlin_pwm_enable()
162 	struct berlin_pwm_chip *pwm = to_berlin_pwm_chip(chip);  in berlin_pwm_disable()  local
165 	value = berlin_pwm_readl(pwm, pwm_dev->hwpwm, BERLIN_PWM_EN);  in berlin_pwm_disable()
167 	berlin_pwm_writel(pwm, pwm_dev->hwpwm, value, BERLIN_PWM_EN);  in berlin_pwm_disable()
181 	{ .compatible = "marvell,berlin-pwm" },
188 	struct berlin_pwm_chip *pwm;  in berlin_pwm_probe()  local
192 	pwm = devm_kzalloc(&pdev->dev, sizeof(*pwm), GFP_KERNEL);  in berlin_pwm_probe()
193 	if (!pwm)  in berlin_pwm_probe()
197 	pwm->base = devm_ioremap_resource(&pdev->dev, res);  in berlin_pwm_probe()
198 	if (IS_ERR(pwm->base))  in berlin_pwm_probe()
199 		return PTR_ERR(pwm->base);  in berlin_pwm_probe()
201 	pwm->clk = devm_clk_get(&pdev->dev, NULL);  in berlin_pwm_probe()
202 	if (IS_ERR(pwm->clk))  in berlin_pwm_probe()
203 		return PTR_ERR(pwm->clk);  in berlin_pwm_probe()
205 	ret = clk_prepare_enable(pwm->clk);  in berlin_pwm_probe()
209 	pwm->chip.dev = &pdev->dev;  in berlin_pwm_probe()
210 	pwm->chip.ops = &berlin_pwm_ops;  in berlin_pwm_probe()
211 	pwm->chip.base = -1;  in berlin_pwm_probe()
212 	pwm->chip.npwm = 4;  in berlin_pwm_probe()
213 	pwm->chip.of_xlate = of_pwm_xlate_with_flags;  in berlin_pwm_probe()
214 	pwm->chip.of_pwm_n_cells = 3;  in berlin_pwm_probe()
216 	ret = pwmchip_add(&pwm->chip);  in berlin_pwm_probe()
218 		dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);  in berlin_pwm_probe()
219 		clk_disable_unprepare(pwm->clk);  in berlin_pwm_probe()
223 	platform_set_drvdata(pdev, pwm);  in berlin_pwm_probe()
230 	struct berlin_pwm_chip *pwm = platform_get_drvdata(pdev);  in berlin_pwm_remove()  local
233 	ret = pwmchip_remove(&pwm->chip);  in berlin_pwm_remove()
234 	clk_disable_unprepare(pwm->clk);  in berlin_pwm_remove()
242 	struct berlin_pwm_chip *pwm = dev_get_drvdata(dev);  in berlin_pwm_suspend()  local
245 	for (i = 0; i < pwm->chip.npwm; i++) {  in berlin_pwm_suspend()
248 		channel = pwm_get_chip_data(&pwm->chip.pwms[i]);  in berlin_pwm_suspend()
252 		channel->enable = berlin_pwm_readl(pwm, i, BERLIN_PWM_ENABLE);  in berlin_pwm_suspend()
253 		channel->ctrl = berlin_pwm_readl(pwm, i, BERLIN_PWM_CONTROL);  in berlin_pwm_suspend()
254 		channel->duty = berlin_pwm_readl(pwm, i, BERLIN_PWM_DUTY);  in berlin_pwm_suspend()
255 		channel->tcnt = berlin_pwm_readl(pwm, i, BERLIN_PWM_TCNT);  in berlin_pwm_suspend()
258 	clk_disable_unprepare(pwm->clk);  in berlin_pwm_suspend()
265 	struct berlin_pwm_chip *pwm = dev_get_drvdata(dev);  in berlin_pwm_resume()  local
269 	ret = clk_prepare_enable(pwm->clk);  in berlin_pwm_resume()
273 	for (i = 0; i < pwm->chip.npwm; i++) {  in berlin_pwm_resume()
276 		channel = pwm_get_chip_data(&pwm->chip.pwms[i]);  in berlin_pwm_resume()
280 		berlin_pwm_writel(pwm, i, channel->ctrl, BERLIN_PWM_CONTROL);  in berlin_pwm_resume()
281 		berlin_pwm_writel(pwm, i, channel->duty, BERLIN_PWM_DUTY);  in berlin_pwm_resume()
282 		berlin_pwm_writel(pwm, i, channel->tcnt, BERLIN_PWM_TCNT);  in berlin_pwm_resume()
283 		berlin_pwm_writel(pwm, i, channel->enable, BERLIN_PWM_ENABLE);  in berlin_pwm_resume()
297 		.name = "berlin-pwm",
305 MODULE_DESCRIPTION("Marvell Berlin PWM driver");