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 <[email protected]>
Cc: [email protected]
Signed-off-by: Samuel Ortiz <[email protected]>
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
index 2c38ac1..3e41e0c 100644
--- a/drivers/mfd/twl4030-power.c
+++ b/drivers/mfd/twl4030-power.c
@@ -75,6 +75,8 @@
*/
#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 @@
#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 @@
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 @@
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;
}
