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authorAmit Kucheria <amit.kucheria@verdurent.com>2009-10-19 16:11:00 +0400
committerSamuel Ortiz <sameo@linux.intel.com>2009-12-13 21:21:24 +0300
commitb4ead61e570d7b7bcf20a5a1733dd0bc37236c99 (patch)
treebbac1d65426eadb7d2b2208a55ead373cdd91790 /drivers/mfd/twl4030-power.c
parent890463f0ff2bc5c62470dba181a5362bf7a5b22e (diff)
downloadlinux-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>
Diffstat (limited to 'drivers/mfd/twl4030-power.c')
-rw-r--r--drivers/mfd/twl4030-power.c36
1 files changed, 36 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;
}