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mfd: Add stmpe auto sleep feature

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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>
This commit is contained in:
Sundar R Iyer
2010-07-21 11:41:07 +05:30
committed by Samuel Ortiz
parent 3faeb35ccc
commit 5981f4e65c
3 changed files with 81 additions and 0 deletions
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7
drivers/mfd/stmpe.h
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@@ -49,6 +49,7 @@ struct stmpe_variant_block {
* 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 @@ struct stmpe_variant_info {
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 @@ struct stmpe_variant_info {
#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 @@ struct stmpe_variant_info {
#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
*/