Merge tag 'pwm/for-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

Pull pwm updates from Thierry Reding:
 "This set of changes improve some aspects of the atomic API as well as
  make use of this new API in the regulator framework to allow properly
  dealing with critical regulators controlled by a PWM.

  Aside from that there's a bunch of updates and cleanups for existing
  drivers, as well as the addition of new drivers for the Broadcom
  iProc, STMPE and ChromeOS EC controllers"

* tag 'pwm/for-4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (44 commits)
  regulator: pwm: Document pwm-dutycycle-unit and pwm-dutycycle-range
  regulator: pwm: Support extra continuous mode cases
  pwm: Add ChromeOS EC PWM driver
  dt-bindings: pwm: Add binding for ChromeOS EC PWM
  mfd: cros_ec: Add EC_PWM function definitions
  mfd: cros_ec: Add cros_ec_cmd_xfer_status() helper
  pwm: atmel: Use of_device_get_match_data()
  pwm: atmel: Fix checkpatch warnings
  pwm: atmel: Fix disabling of PWM channels
  dt-bindings: pwm: Add R-Car H3 device tree bindings
  pwm: rcar: Use ARCH_RENESAS
  pwm: tegra: Add support for Tegra186
  dt-bindings: pwm: tegra: Add compatible string for Tegra186
  pwm: tegra: Avoid overflow when calculating duty cycle
  pwm: tegra: Allow 100 % duty cycle
  pwm: tegra: Add support for reset control
  pwm: tegra: Rename mmio_base to regs
  pwm: tegra: Remove useless padding
  pwm: tegra: Drop NUM_PWM macro
  pwm: lpc32xx: Set PWM_PIN_LEVEL bit to default value
  ...

2 files changed, 46 insertions, 0 deletions

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