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| author | Amit Kucheria <amit.kucheria@verdurent.com> | 2009-10-19 16:11:00 +0400 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2009-12-13 21:21:24 +0300 |
| commit | b4ead61e570d7b7bcf20a5a1733dd0bc37236c99 (patch) | |
| tree | bbac1d65426eadb7d2b2208a55ead373cdd91790 | |
| parent | 890463f0ff2bc5c62470dba181a5362bf7a5b22e (diff) | |
| download | linux-b4ead61e570d7b7bcf20a5a1733dd0bc37236c99.tar.xz | |
mfd: Add support for remapping twl4030-power power states
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>
| -rw-r--r-- | drivers/mfd/twl4030-power.c | 36 | ||||
| -rw-r--r-- | include/linux/i2c/twl4030.h | 3 |
2 files changed, 39 insertions, 0 deletions
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c index 2c38ac17ab64..3e41e0c0e4c6 100644 --- a/drivers/mfd/twl4030-power.c +++ b/drivers/mfd/twl4030-power.c @@ -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; } diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h index 5306a759cbde..e87cb270d8a1 100644 --- a/include/linux/i2c/twl4030.h +++ b/include/linux/i2c/twl4030.h @@ -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 { |