diff options
Diffstat (limited to 'common/pwm.c')
-rw-r--r-- | common/pwm.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/common/pwm.c b/common/pwm.c index 7377d1d170..c689b0acac 100644 --- a/common/pwm.c +++ b/common/pwm.c @@ -7,10 +7,78 @@ #include "console.h" #include "gpio.h" #include "hooks.h" +#include "host_command.h" #include "pwm.h" #include "util.h" #ifdef CONFIG_PWM + +/* + * Get target channel based on type / index host command parameters. + * Returns 0 if a valid channel is selected, -1 on error. + */ +static int get_target_channel(enum pwm_channel *channel, int type, int index) +{ + switch (type) { + case EC_PWM_TYPE_GENERIC: + *channel = index; + break; +#ifdef CONFIG_PWM_KBLIGHT + case EC_PWM_TYPE_KB_LIGHT: + *channel = PWM_CH_KBLIGHT; + break; +#endif +#ifdef CONFIG_PWM_DISPLIGHT + case EC_PWM_TYPE_DISPLAY_LIGHT: + *channel = PWM_CH_DISPLIGHT; + break; +#endif + default: + return -1; + } + + return *channel >= PWM_CH_COUNT; +} + +static int host_command_pwm_set_duty(struct host_cmd_handler_args *args) +{ + const struct ec_params_pwm_set_duty *p = args->params; + enum pwm_channel channel; + + if (p->percent > 100) + return EC_RES_INVALID_PARAM; + + if (get_target_channel(&channel, p->pwm_type, p->index)) + return EC_RES_INVALID_PARAM; + + pwm_set_duty(channel, p->percent); + pwm_enable(channel, p->percent > 0); + + return EC_RES_SUCCESS; +} +DECLARE_HOST_COMMAND(EC_CMD_PWM_SET_DUTY, + host_command_pwm_set_duty, + EC_VER_MASK(0)); + +static int host_command_pwm_get_duty(struct host_cmd_handler_args *args) +{ + const struct ec_params_pwm_get_duty *p = args->params; + struct ec_response_pwm_get_duty *r = args->response; + + enum pwm_channel channel; + + if (get_target_channel(&channel, p->pwm_type, p->index)) + return EC_RES_INVALID_PARAM; + + r->percent = pwm_get_duty(channel); + args->response_size = sizeof(*r); + + return EC_RES_SUCCESS; +} +DECLARE_HOST_COMMAND(EC_CMD_PWM_GET_DUTY, + host_command_pwm_get_duty, + EC_VER_MASK(0)); + /** * Print status of a PWM channel. * |