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mfd: Add support for remapping twl4030-power power states

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The <RESOURCE>_REMAP register allows configuration of the <RESOURCE> in case
of a sleep or off transition.

Allow this property of resources to be configured (through twl4030_resconfig)
and add code to parse these values to program the registers accordingly.

Signed-off-by: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: linux-omap@vger.kernel.org
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Amit Kucheria 2009-10-19 15:11:00 +03:00 committed by Samuel Ortiz
parent 890463f0ff
commit b4ead61e57
2 changed files with 39 additions and 0 deletions
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36
drivers/mfd/twl4030-power.c
View file

@ -75,6 +75,8 @@ static u8 twl4030_start_script_address = 0x2b;
*/
#define DEV_GRP_OFFSET 0
#define TYPE_OFFSET 1
#define REMAP_OFFSET 2
#define DEDICATED_OFFSET 3
/* Bit positions in the registers */
@ -88,6 +90,12 @@ static u8 twl4030_start_script_address = 0x2b;
#define TYPE2_SHIFT 3
#define TYPE2_MASK (3 << TYPE2_SHIFT)
/* <RESOURCE>_REMAP */
#define SLEEP_STATE_SHIFT 0
#define SLEEP_STATE_MASK (0xf << SLEEP_STATE_SHIFT)
#define OFF_STATE_SHIFT 4
#define OFF_STATE_MASK (0xf << OFF_STATE_SHIFT)
static u8 res_config_addrs[] = {
[RES_VAUX1] = 0x17,
[RES_VAUX2] = 0x1b,
@ -325,6 +333,7 @@ static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
int err;
u8 type;
u8 grp;
u8 remap;
if (rconfig->resource > TOTAL_RESOURCES) {
pr_err("TWL4030 Resource %d does not exist\n",
@ -380,6 +389,33 @@ static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
return err;
}
/* Set remap states */
err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &remap,
rconfig_addr + REMAP_OFFSET);
if (err < 0) {
pr_err("TWL4030 Resource %d remap could not be read\n",
rconfig->resource);
return err;
}
if (rconfig->remap_off >= 0) {
remap &= ~OFF_STATE_MASK;
remap |= rconfig->remap_off << OFF_STATE_SHIFT;
}
if (rconfig->remap_sleep >= 0) {
remap &= ~SLEEP_STATE_MASK;
remap |= rconfig->remap_off << SLEEP_STATE_SHIFT;
}
err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
remap,
rconfig_addr + REMAP_OFFSET);
if (err < 0) {
pr_err("TWL4030 failed to program remap\n");
return err;
}
return 0;
}

3
include/linux/i2c/twl4030.h
View file

@ -250,6 +250,7 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
#define RES_TYPE_ALL 0x7
/* Resource states */
#define RES_STATE_WRST 0xF
#define RES_STATE_ACTIVE 0xE
#define RES_STATE_SLEEP 0x8
@ -391,6 +392,8 @@ struct twl4030_resconfig {
u8 devgroup; /* Processor group that Power resource belongs to */
u8 type; /* Power resource addressed, 6 / broadcast message */
u8 type2; /* Power resource addressed, 3 / broadcast message */
u8 remap_off; /* off state remapping */
u8 remap_sleep; /* sleep state remapping */
};
struct twl4030_power_data {