This patch is providing an optional power off handler
which will configure standby state of the PMIC to disable all power lines.
In my power consumption test on RIoTBoard, I got the following results:
power off without this patch: 320 mA
power off with this patch: 2 mA
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
drivers/regulator/Kconfig | 1 +
drivers/regulator/pfuze.c | 67 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 68 insertions(+)
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 6a6c6d2248..92db8dc0e0 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -19,5 +19,6 @@ config REGULATOR_BCM283X
config REGULATOR_PFUZE
bool "Freescale PFUZE100/200/3000 regulator driver"
depends on I2C
+ depends on ARCH_IMX6
endif
diff --git a/drivers/regulator/pfuze.c b/drivers/regulator/pfuze.c
index 2a5fb715ce..dc41e8f55b 100644
--- a/drivers/regulator/pfuze.c
+++ b/drivers/regulator/pfuze.c
@@ -26,10 +26,33 @@
#include <i2c/i2c.h>
+#include <poweroff.h>
+#include <mach/imx6.h>
+
#define DRIVERNAME "pfuze"
#define MC13XXX_NUMREGS 0x3f
+#define PFUZE100_SW1ABMODE 0x23
+#define PFUZE100_SW1CMODE 0x31
+#define PFUZE100_SW2MODE 0x38
+#define PFUZE100_SW3AMODE 0x3f
+#define PFUZE100_SW3BMODE 0x46
+#define PFUZE100_SW4MODE 0x4d
+#define PFUZE100_VGEN1VOL 0x6c
+#define PFUZE100_VGEN2VOL 0x6d
+#define PFUZE100_VGEN3VOL 0x6e
+#define PFUZE100_VGEN4VOL 0x6f
+#define PFUZE100_VGEN5VOL 0x70
+#define PFUZE100_VGEN6VOL 0x71
+
+#define PFUZE100_SWxMODE_MASK 0xf
+#define PFUZE100_SWxMODE_APS_APS 0x8
+#define PFUZE100_SWxMODE_APS_OFF 0x4
+
+#define PFUZE100_VGENxLPWR BIT(6)
+#define PFUZE100_VGENxSTBY BIT(5)
+
struct pfuze {
struct device_d *dev;
struct regmap *map;
@@ -85,6 +108,46 @@ static int pfuze_i2c_reg_write(void *ctx, unsigned int reg, unsigned int val)
return ret == 1 ? 0 : ret;
}
+static void pfuze_power_off_prepare(struct poweroff_handler *handler)
+{
+ dev_info(pfuze_dev->dev, "Configure standy mode for power off");
+
+ /* Switch from default mode: APS/APS to APS/Off */
+ regmap_write_bits(pfuze_dev->map, PFUZE100_SW1ABMODE,
+ PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_SW1CMODE,
+ PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_SW2MODE,
+ PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_SW3AMODE,
+ PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_SW3BMODE,
+ PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_SW4MODE,
+ PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
+
+ regmap_write_bits(pfuze_dev->map, PFUZE100_VGEN1VOL,
+ PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
+ PFUZE100_VGENxSTBY);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_VGEN2VOL,
+ PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
+ PFUZE100_VGENxSTBY);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_VGEN3VOL,
+ PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
+ PFUZE100_VGENxSTBY);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_VGEN4VOL,
+ PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
+ PFUZE100_VGENxSTBY);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_VGEN5VOL,
+ PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
+ PFUZE100_VGENxSTBY);
+ regmap_write_bits(pfuze_dev->map, PFUZE100_VGEN6VOL,
+ PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
+ PFUZE100_VGENxSTBY);
+
+ imx6_pm_stby_poweroff();
+}
+
static struct regmap_bus regmap_pfuze_i2c_bus = {
.reg_write = pfuze_i2c_reg_write,
.reg_read = pfuze_i2c_reg_read,
@@ -122,6 +185,10 @@ static int __init pfuze_probe(struct device_d *dev)
if (pfuze_init_callback)
pfuze_init_callback(pfuze_dev->map);
+ if (of_property_read_bool(dev->device_node,
+ "fsl,pmic-stby-poweroff"))
+ return poweroff_handler_register_fn(pfuze_power_off_prepare);
+
return 0;
}
--
2.11.0
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
