mfd: Add stmpe auto sleep feature
Some STMPE devices support entering sleep mode automatically on a
specified timeout of inactivity on the I2C bus with the host system.
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Sundar R Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/stmpe.h b/drivers/mfd/stmpe.h
index 991f0ec..0dbdc4e 100644
--- a/drivers/mfd/stmpe.h
+++ b/drivers/mfd/stmpe.h
@@ -49,6 +49,7 @@
* Called with the I/O lock held.
* @get_altfunc: callback to get the alternate function number for the
* specific block
+ * @enable_autosleep: callback to configure autosleep with specified timeout
*/
struct stmpe_variant_info {
const char *name;
@@ -62,6 +63,7 @@
int num_irqs;
int (*enable)(struct stmpe *stmpe, unsigned int blocks, bool enable);
int (*get_altfunc)(struct stmpe *stmpe, enum stmpe_block block);
+ int (*enable_autosleep)(struct stmpe *stmpe, int autosleep_timeout);
};
#define STMPE_ICR_LSB_HIGH (1 << 2)
@@ -118,6 +120,7 @@
#define STMPE1601_NR_INTERNAL_IRQS 9
#define STMPE1601_REG_SYS_CTRL 0x02
+#define STMPE1601_REG_SYS_CTRL2 0x03
#define STMPE1601_REG_ICR_LSB 0x11
#define STMPE1601_REG_IER_LSB 0x13
#define STMPE1601_REG_ISR_MSB 0x14
@@ -137,6 +140,10 @@
#define STMPE1601_SYS_CTRL_ENABLE_KPC (1 << 1)
#define STMPE1601_SYSCON_ENABLE_SPWM (1 << 0)
+/* The 1601/2403 share the same masks */
+#define STMPE1601_AUTOSLEEP_TIMEOUT_MASK (0x7)
+#define STPME1601_AUTOSLEEP_ENABLE (1 << 3)
+
/*
* STMPE24xx
*/