mfd: pm8xxx-misc: Add API to read PMIC registers
This API reads the PMIC registers at runtime and can be called
from process/interrupt context. It is currently enabled for PM8921.
Change-Id: I63a80293e37725569d075de814f27f67382976ca
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
diff --git a/include/linux/mfd/pm8xxx/misc.h b/include/linux/mfd/pm8xxx/misc.h
index fa97ba9..33b03be 100644
--- a/include/linux/mfd/pm8xxx/misc.h
+++ b/include/linux/mfd/pm8xxx/misc.h
@@ -224,6 +224,16 @@
* RETURNS: an appropriate -ERRNO error value on error, or zero for success.
*/
int pm8xxx_hsed_bias_control(enum pm8xxx_hsed_bias bias, bool enable);
+
+/**
+ * pm8xxx_read_register - Read a PMIC register
+ * @addr: PMIC register address
+ * @value: Output parameter which gets the value of the register read.
+ *
+ * RETURNS: an appropriate -ERRNO error value on error, or zero for success.
+ */
+int pm8xxx_read_register(u16 addr, u8 *value);
+
#else
static inline int pm8xxx_reset_pwr_off(int reset)