41 static int  __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm)  in __set_pwm()  argument
46 	mutex_lock(&ctx->lock);  in __set_pwm()
47 	if (ctx->pwm_value == pwm)  in __set_pwm()
50 	duty = DIV_ROUND_UP(pwm * (ctx->pwm->period - 1), MAX_PWM);  in __set_pwm()
51 	ret = pwm_config(ctx->pwm, duty, ctx->pwm->period);  in __set_pwm()
56 		pwm_disable(ctx->pwm);  in __set_pwm()
58 	if (ctx->pwm_value == 0) {  in __set_pwm()
59 		ret = pwm_enable(ctx->pwm);  in __set_pwm()
64 	ctx->pwm_value = pwm;  in __set_pwm()
66 	mutex_unlock(&ctx->lock);  in __set_pwm()
70 static void pwm_fan_update_state(struct pwm_fan_ctx *ctx, unsigned long pwm)  in pwm_fan_update_state()  argument
74 	for (i = 0; i < ctx->pwm_fan_max_state; ++i)  in pwm_fan_update_state()
75 		if (pwm < ctx->pwm_fan_cooling_levels[i + 1])  in pwm_fan_update_state()
78 	ctx->pwm_fan_state = i;  in pwm_fan_update_state()
84 	struct pwm_fan_ctx *ctx = dev_get_drvdata(dev);  in set_pwm()  local
91 	ret = __set_pwm(ctx, pwm);  in set_pwm()
95 	pwm_fan_update_state(ctx, pwm);  in set_pwm()
102 	struct pwm_fan_ctx *ctx = dev_get_drvdata(dev);  in show_pwm()  local
104 	return sprintf(buf, "%u\n", ctx->pwm_value);  in show_pwm()
121 	struct pwm_fan_ctx *ctx = cdev->devdata;  in pwm_fan_get_max_state()  local
123 	if (!ctx)  in pwm_fan_get_max_state()
126 	*state = ctx->pwm_fan_max_state;  in pwm_fan_get_max_state()
134 	struct pwm_fan_ctx *ctx = cdev->devdata;  in pwm_fan_get_cur_state()  local
136 	if (!ctx)  in pwm_fan_get_cur_state()
139 	*state = ctx->pwm_fan_state;  in pwm_fan_get_cur_state()
147 	struct pwm_fan_ctx *ctx = cdev->devdata;  in pwm_fan_set_cur_state()  local
150 	if (!ctx || (state > ctx->pwm_fan_max_state))  in pwm_fan_set_cur_state()
153 	if (state == ctx->pwm_fan_state)  in pwm_fan_set_cur_state()
156 	ret = __set_pwm(ctx, ctx->pwm_fan_cooling_levels[state]);  in pwm_fan_set_cur_state()
162 	ctx->pwm_fan_state = state;  in pwm_fan_set_cur_state()
174 				       struct pwm_fan_ctx *ctx)  in pwm_fan_of_get_cooling_data()  argument
189 	ctx->pwm_fan_cooling_levels = devm_kzalloc(dev, num * sizeof(u32),  in pwm_fan_of_get_cooling_data()
191 	if (!ctx->pwm_fan_cooling_levels)  in pwm_fan_of_get_cooling_data()
195 					 ctx->pwm_fan_cooling_levels, num);  in pwm_fan_of_get_cooling_data()
202 		if (ctx->pwm_fan_cooling_levels[i] > MAX_PWM) {  in pwm_fan_of_get_cooling_data()
204 				ctx->pwm_fan_cooling_levels[i], MAX_PWM);  in pwm_fan_of_get_cooling_data()
209 	ctx->pwm_fan_max_state = num - 1;  in pwm_fan_of_get_cooling_data()
217 	struct pwm_fan_ctx *ctx;  in pwm_fan_probe()  local
222 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);  in pwm_fan_probe()
223 	if (!ctx)  in pwm_fan_probe()
226 	mutex_init(&ctx->lock);  in pwm_fan_probe()
228 	ctx->pwm = devm_of_pwm_get(&pdev->dev, pdev->dev.of_node, NULL);  in pwm_fan_probe()
229 	if (IS_ERR(ctx->pwm)) {  in pwm_fan_probe()
231 		return PTR_ERR(ctx->pwm);  in pwm_fan_probe()
234 	platform_set_drvdata(pdev, ctx);  in pwm_fan_probe()
237 	duty_cycle = ctx->pwm->period - 1;  in pwm_fan_probe()
238 	ctx->pwm_value = MAX_PWM;  in pwm_fan_probe()
240 	ret = pwm_config(ctx->pwm, duty_cycle, ctx->pwm->period);  in pwm_fan_probe()
247 	ret = pwm_enable(ctx->pwm);  in pwm_fan_probe()
254 						       ctx, pwm_fan_groups);  in pwm_fan_probe()
257 		pwm_disable(ctx->pwm);  in pwm_fan_probe()
261 	ret = pwm_fan_of_get_cooling_data(&pdev->dev, ctx);  in pwm_fan_probe()
265 	ctx->pwm_fan_state = ctx->pwm_fan_max_state;  in pwm_fan_probe()
268 							  "pwm-fan", ctx,  in pwm_fan_probe()
273 			pwm_disable(ctx->pwm);  in pwm_fan_probe()
276 		ctx->cdev = cdev;  in pwm_fan_probe()
285 	struct pwm_fan_ctx *ctx = platform_get_drvdata(pdev);  in pwm_fan_remove()  local
287 	thermal_cooling_device_unregister(ctx->cdev);  in pwm_fan_remove()
288 	if (ctx->pwm_value)  in pwm_fan_remove()
289 		pwm_disable(ctx->pwm);  in pwm_fan_remove()
296 	struct pwm_fan_ctx *ctx = dev_get_drvdata(dev);  in pwm_fan_suspend()  local
298 	if (ctx->pwm_value)  in pwm_fan_suspend()
299 		pwm_disable(ctx->pwm);  in pwm_fan_suspend()
305 	struct pwm_fan_ctx *ctx = dev_get_drvdata(dev);  in pwm_fan_resume()  local
309 	if (ctx->pwm_value == 0)  in pwm_fan_resume()
312 	duty = DIV_ROUND_UP(ctx->pwm_value * (ctx->pwm->period - 1), MAX_PWM);  in pwm_fan_resume()
313 	ret = pwm_config(ctx->pwm, duty, ctx->pwm->period);  in pwm_fan_resume()
316 	return pwm_enable(ctx->pwm);  in pwm_fan_resume()