3  * Expose a PWM controlled by the ChromeOS EC to the host processor.
16  * struct cros_ec_pwm_device - Driver data for EC PWM
19  * @ec: Pointer to EC device
24 	struct cros_ec_device *ec;  member
61 static int cros_ec_pwm_set_duty(struct cros_ec_device *ec, u8 index, u16 duty)  in cros_ec_pwm_set_duty()  argument
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, u8 index)  in cros_ec_pwm_get_duty()  argument
108 	ret = cros_ec_cmd_xfer_status(ec, msg);  in cros_ec_pwm_get_duty()
123 	/* The EC won't let us change the period */  in cros_ec_pwm_apply()
128 	 * EC doesn't separate the concept of duty cycle and enabled, but  in cros_ec_pwm_apply()
133 	ret = cros_ec_pwm_set_duty(ec_pwm->ec, pwm->hwpwm, duty_cycle);  in cros_ec_pwm_apply()
149 	ret = cros_ec_pwm_get_duty(ec_pwm->ec, pwm->hwpwm);  in cros_ec_pwm_get_state()
165 	 * will be 0 and the actual duty cycle read from the EC is used.  in cros_ec_pwm_get_state()
185 	/* The EC won't let us change the period */  in cros_ec_pwm_xlate()
200  * Determine the number of supported PWMs. The EC does not return the number
204 static int cros_ec_num_pwms(struct cros_ec_device *ec)  in cros_ec_num_pwms()  argument
210 		ret = cros_ec_pwm_get_duty(ec, i);  in cros_ec_num_pwms()
214 		 * The EC error codes map to -EOPNOTSUPP and -EINVAL,  in cros_ec_num_pwms()
234 	struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);  in cros_ec_pwm_probe()  local
240 	if (!ec) {  in cros_ec_pwm_probe()
241 		dev_err(dev, "no parent EC device\n");  in cros_ec_pwm_probe()
249 	ec_pwm->ec = ec;  in cros_ec_pwm_probe()
257 	ret = cros_ec_num_pwms(ec);  in cros_ec_pwm_probe()
286 	{ .compatible = "google,cros-ec-pwm" },
296 		.name = "cros-ec-pwm",
302 MODULE_ALIAS("platform:cros-ec-pwm");
303 MODULE_DESCRIPTION("ChromeOS EC PWM driver");