diff options
| -rw-r--r-- | drivers/platform/chrome/cros_ec_proto.c | 17 | ||||
| -rw-r--r-- | include/linux/mfd/cros_ec.h | 15 | ||||
| -rw-r--r-- | include/linux/mfd/cros_ec_commands.h | 31 |
3 files changed, 63 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index b6e161f71b26..6c084b266651 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -380,3 +380,20 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, return ret; } EXPORT_SYMBOL(cros_ec_cmd_xfer); + +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg) +{ + int ret; + + ret = cros_ec_cmd_xfer(ec_dev, msg); + if (ret < 0) { + dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret); + } else if (msg->result != EC_RES_SUCCESS) { + dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result); + return -EPROTO; + } + + return ret; +} +EXPORT_SYMBOL(cros_ec_cmd_xfer_status); diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h index 64184d27e3cd..d641a18abacb 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -226,6 +226,21 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, struct cros_ec_command *msg); /** + * cros_ec_cmd_xfer_status - Send a command to the ChromeOS EC + * + * This function is identical to cros_ec_cmd_xfer, except it returns success + * status only if both the command was transmitted successfully and the EC + * replied with success status. It's not necessary to check msg->result when + * using this function. + * + * @ec_dev: EC device + * @msg: Message to write + * @return: Num. of bytes transferred on success, <0 on failure + */ +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg); + +/** * cros_ec_remove - Remove a ChromeOS EC * * Call this to deregister a ChromeOS EC, then clean up any private data. diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h index 13b630c10d4c..7e7a8d4b4551 100644 --- a/include/linux/mfd/cros_ec_commands.h +++ b/include/linux/mfd/cros_ec_commands.h @@ -949,6 +949,37 @@ struct ec_params_pwm_set_fan_duty { uint32_t percent; } __packed; +#define EC_CMD_PWM_SET_DUTY 0x25 +/* 16 bit duty cycle, 0xffff = 100% */ +#define EC_PWM_MAX_DUTY 0xffff + +enum ec_pwm_type { + /* All types, indexed by board-specific enum pwm_channel */ + EC_PWM_TYPE_GENERIC = 0, + /* Keyboard backlight */ + EC_PWM_TYPE_KB_LIGHT, + /* Display backlight */ + EC_PWM_TYPE_DISPLAY_LIGHT, + EC_PWM_TYPE_COUNT, +}; + +struct ec_params_pwm_set_duty { + uint16_t duty; /* Duty cycle, EC_PWM_MAX_DUTY = 100% */ + uint8_t pwm_type; /* ec_pwm_type */ + uint8_t index; /* Type-specific index, or 0 if unique */ +} __packed; + +#define EC_CMD_PWM_GET_DUTY 0x26 + +struct ec_params_pwm_get_duty { + uint8_t pwm_type; /* ec_pwm_type */ + uint8_t index; /* Type-specific index, or 0 if unique */ +} __packed; + +struct ec_response_pwm_get_duty { + uint16_t duty; /* Duty cycle, EC_PWM_MAX_DUTY = 100% */ +} __packed; + /*****************************************************************************/ /* * Lightbar commands. This looks worse than it is. Since we only use one HOST |