sunxi: power: Add support for disabling axp209 regulators

Add support for disabling the regulators found on the axp209 pmic.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

diff --git a/drivers/power/axp209.c b/drivers/power/axp209.c
index bb5d08b..71aa000 100644 (file)
--- a/drivers/power/axp209.c
+++ b/drivers/power/axp209.c
@@ -24,6 +24,14 @@ int axp_set_dcdc2(unsigned int mvolt)
        int rc;
        u8 cfg, current;
 
+       if (mvolt == 0)
+               return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
+                                       AXP209_OUTPUT_CTRL_DCDC2);
+
+       rc = pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC2);
+       if (rc)
+               return rc;
+
        cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
 
        /* Do we really need to be this gentle? It has built-in voltage slope */
@@ -45,8 +53,17 @@ int axp_set_dcdc2(unsigned int mvolt)
 int axp_set_dcdc3(unsigned int mvolt)
 {
        u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
+       int rc;
+
+       if (mvolt == 0)
+               return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
+                                       AXP209_OUTPUT_CTRL_DCDC3);
 
-       return pmic_bus_write(AXP209_DCDC3_VOLTAGE, cfg);
+       rc = pmic_bus_write(AXP209_DCDC3_VOLTAGE, cfg);
+       if (rc)
+               return rc;
+
+       return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_DCDC3);
 }
 
 int axp_set_aldo2(unsigned int mvolt)
@@ -54,6 +71,10 @@ int axp_set_aldo2(unsigned int mvolt)
        int rc;
        u8 cfg, reg;
 
+       if (mvolt == 0)
+               return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
+                                       AXP209_OUTPUT_CTRL_LDO2);
+
        cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
 
        rc = pmic_bus_read(AXP209_LDO24_VOLTAGE, &reg);
@@ -62,19 +83,32 @@ int axp_set_aldo2(unsigned int mvolt)
 
        /* LDO2 configuration is in upper 4 bits */
        reg = (reg & 0x0f) | (cfg << 4);
-       return pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
+       rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
+       if (rc)
+               return rc;
+
+       return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO2);
 }
 
 int axp_set_aldo3(unsigned int mvolt)
 {
        u8 cfg;
+       int rc;
+
+       if (mvolt == 0)
+               return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
+                                       AXP209_OUTPUT_CTRL_LDO3);
 
        if (mvolt == -1)
                cfg = 0x80;     /* determined by LDO3IN pin */
        else
                cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
 
-       return pmic_bus_write(AXP209_LDO3_VOLTAGE, cfg);
+       rc = pmic_bus_write(AXP209_LDO3_VOLTAGE, cfg);
+       if (rc)
+               return rc;
+
+       return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO3);
 }
 
 int axp_set_aldo4(unsigned int mvolt)
@@ -86,6 +120,10 @@ int axp_set_aldo4(unsigned int mvolt)
        };
        u8 cfg, reg;
 
+       if (mvolt == 0)
+               return pmic_bus_clrbits(AXP209_OUTPUT_CTRL,
+                                       AXP209_OUTPUT_CTRL_LDO4);
+
        /* Translate mvolt to register cfg value, requested <= selected */
        for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
 
@@ -95,7 +133,11 @@ int axp_set_aldo4(unsigned int mvolt)
 
        /* LDO4 configuration is in lower 4 bits */
        reg = (reg & 0xf0) | (cfg << 0);
-       return pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
+       rc = pmic_bus_write(AXP209_LDO24_VOLTAGE, reg);
+       if (rc)
+               return rc;
+
+       return pmic_bus_setbits(AXP209_OUTPUT_CTRL, AXP209_OUTPUT_CTRL_LDO4);
 }
 
 int axp_init(void)

diff --git a/include/axp209.h b/include/axp209.h
index 13aa66c..e1b22e3 100644 (file)
--- a/include/axp209.h
+++ b/include/axp209.h
@@ -7,6 +7,7 @@
 enum axp209_reg {
        AXP209_POWER_STATUS = 0x00,
        AXP209_CHIP_VERSION = 0x03,
+       AXP209_OUTPUT_CTRL = 0x12,
        AXP209_DCDC2_VOLTAGE = 0x23,
        AXP209_DCDC3_VOLTAGE = 0x27,
        AXP209_LDO24_VOLTAGE = 0x28,
@@ -23,6 +24,13 @@ enum axp209_reg {
 #define AXP209_POWER_STATUS_ON_BY_DC   (1 << 0)
 #define AXP209_POWER_STATUS_VBUS_USABLE        (1 << 4)
 
+#define AXP209_OUTPUT_CTRL_EXTEN       (1 << 0)
+#define AXP209_OUTPUT_CTRL_DCDC3       (1 << 1)
+#define AXP209_OUTPUT_CTRL_LDO2                (1 << 2)
+#define AXP209_OUTPUT_CTRL_LDO4                (1 << 3)
+#define AXP209_OUTPUT_CTRL_DCDC2       (1 << 4)
+#define AXP209_OUTPUT_CTRL_LDO3                (1 << 6)
+
 #define AXP209_IRQ5_PEK_UP             (1 << 6)
 #define AXP209_IRQ5_PEK_DOWN           (1 << 5)