3  * Expose a PWM controlled by the ChromeOS EC to the host processor.
19  * struct cros_ec_pwm_device - Driver data for EC PWM
21  * @ec: Pointer to EC device
25 	struct cros_ec_device *ec;  member
51 	struct cros_ec_device *ec = ec_pwm->ec;  in cros_ec_pwm_set_duty()  local
72 			dev_err(ec->dev, "Invalid PWM type index: %d\n", index);  in cros_ec_pwm_set_duty()
81 	return cros_ec_cmd_xfer_status(ec, msg);  in cros_ec_pwm_set_duty()
84 static int cros_ec_pwm_get_duty(struct cros_ec_device *ec, bool use_pwm_type, u8 index)  in cros_ec_pwm_get_duty()  argument
108 			dev_err(ec->dev, "Invalid PWM type index: %d\n", index);  in cros_ec_pwm_get_duty()
117 	ret = cros_ec_cmd_xfer_status(ec, msg);  in cros_ec_pwm_get_duty()
131 	/* The EC won't let us change the period */  in cros_ec_pwm_apply()
139 	 * EC doesn't separate the concept of duty cycle and enabled, but  in cros_ec_pwm_apply()
157 	ret = cros_ec_pwm_get_duty(ec_pwm->ec, ec_pwm->use_pwm_type, pwm->hwpwm);  in cros_ec_pwm_get_state()
177  * Determine the number of supported PWMs. The EC does not return the number
181 static int cros_ec_num_pwms(struct cros_ec_device *ec)  in cros_ec_num_pwms()  argument
191 		ret = cros_ec_pwm_get_duty(ec, false, i);  in cros_ec_num_pwms()
195 		 * The EC error codes map to -EOPNOTSUPP and -EINVAL,  in cros_ec_num_pwms()
215 	struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);  in cros_ec_pwm_probe()  local
224 	if (!ec)  in cros_ec_pwm_probe()
225 		return dev_err_probe(dev, -EINVAL, "no parent EC device\n");  in cros_ec_pwm_probe()
227 	if (of_device_is_compatible(np, "google,cros-ec-pwm-type")) {  in cros_ec_pwm_probe()
231 		ret = cros_ec_num_pwms(ec);  in cros_ec_pwm_probe()
243 	ec_pwm->ec = ec;  in cros_ec_pwm_probe()
270 	{ .compatible = "google,cros-ec-pwm" },
271 	{ .compatible = "google,cros-ec-pwm-type" },
280 		.name = "cros-ec-pwm",
286 MODULE_ALIAS("platform:cros-ec-pwm");
287 MODULE_DESCRIPTION("ChromeOS EC PWM driver");