[U-Boot] [PATCH RFC 03/17] power: axp818: Add support for FLDOs

Chen-Yu Tsai
2016-03-29T16:26:48Z

The FLDOs on AXP818 PMIC normally provide power to CPUS and USB HSIC PHY
on the A83T/H8.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
board/sunxi/board.c | 6 ++++++
drivers/power/Kconfig | 27 +++++++++++++++++++++++++++
drivers/power/axp818.c | 34 ++++++++++++++++++++++++++++++++++
include/axp818.h | 1 +
include/axp_pmic.h | 1 +
5 files changed, 69 insertions(+)

diff --git a/board/sunxi/board.c b/board/sunxi/board.c
index 2d5335f..2271c89 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -486,6 +486,12 @@ void sunxi_board_init(void)
power_failed |= axp_set_eldo(2, CONFIG_AXP_ELDO2_VOLT);
power_failed |= axp_set_eldo(3, CONFIG_AXP_ELDO3_VOLT);
#endif
+
+#ifdef CONFIG_AXP818_POWER
+ power_failed |= axp_set_fldo(1, CONFIG_AXP_FLDO1_VOLT);
+ power_failed |= axp_set_fldo(2, CONFIG_AXP_FLDO2_VOLT);
+ power_failed |= axp_set_fldo(3, CONFIG_AXP_FLDO3_VOLT);
+#endif
#endif
printf("DRAM:");
ramsize = sunxi_dram_init();
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 548fe26..937b9aa 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -238,6 +238,33 @@ config AXP_ELDO3_VOLT
1.2V for the SSD2828 chip (converter of parallel LCD interface
into MIPI DSI).

+config AXP_FLDO1_VOLT
+ int "axp pmic fldo1 voltage"
+ depends on AXP818_POWER
+ default 0 if MACH_SUN8I_A83T
+ ---help---
+ Set the voltage (mV) to program the axp pmic fldo1 at, set to 0 to
+ disable fldo1.
+ On A83T / H8 boards fldo1 is VCC-HSIC and should be 1.2V if HSIC is
+ used.
+
+config AXP_FLDO2_VOLT
+ int "axp pmic eldo2 voltage"
+ depends on AXP818_POWER
+ default 900 if MACH_SUN8I_A83T
+ ---help---
+ Set the voltage (mV) to program the axp pmic fldo2 at, set to 0 to
+ disable fldo2.
+ On A83T / H8 boards fldo2 is VCC-CPUS and should be 0.9V.
+
+config AXP_FLDO3_VOLT
+ int "axp pmic fldo3 voltage"
+ depends on AXP818_POWER
+ default 0
+ ---help---
+ Set the voltage (mV) to program the axp pmic fldo3 at, set to 0 to
+ disable fldo3.
+
config SY8106A_VOUT1_VOLT
int "SY8106A pmic VOUT1 voltage"
depends on SY8106A_POWER
diff --git a/drivers/power/axp818.c b/drivers/power/axp818.c
index e885d02..3ac05ff 100644
--- a/drivers/power/axp818.c
+++ b/drivers/power/axp818.c
@@ -191,6 +191,40 @@ int axp_set_eldo(int eldo_num, unsigned int mvolt)
AXP818_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
}

+int axp_set_fldo(int fldo_num, unsigned int mvolt)
+{
+ int ret;
+ u8 cfg;
+
+ if (fldo_num < 1 || fldo_num > 3)
+ return -EINVAL;
+
+ if (mvolt == 0)
+ return pmic_bus_clrbits(AXP818_OUTPUT_CTRL3,
+ AXP818_OUTPUT_CTRL3_FLDO1_EN << (fldo_num - 1));
+
+ if (fldo_num < 3) {
+ cfg = axp818_mvolt_to_cfg(mvolt, 700, 1450, 50);
+ ret = pmic_bus_write(AXP818_FLDO1_CTRL + (fldo_num - 1), cfg);
+ } else {
+ /*
+ * Special case for FLDO3, which is DCDC5 / 2 or FLDOIN / 2
+ * Since FLDOIN is unknown, test against DCDC5.
+ */
+ if (mvolt * 2 == CONFIG_AXP_DCDC5_VOLT)
+ ret = pmic_bus_clrbits(AXP818_FLDO2_3_CTRL,
+ AXP818_FLDO2_3_CTRL_FLDO3_VOL);
+ else
+ ret = pmic_bus_setbits(AXP818_FLDO2_3_CTRL,
+ AXP818_FLDO2_3_CTRL_FLDO3_VOL);
+ }
+ if (ret)
+ return ret;
+
+ return pmic_bus_setbits(AXP818_OUTPUT_CTRL3,
+ AXP818_OUTPUT_CTRL3_FLDO1_EN << (fldo_num - 1));
+}
+
int axp_init(void)
{
u8 axp_chip_id;
diff --git a/include/axp818.h b/include/axp818.h
index c2f9847..003477f 100644
--- a/include/axp818.h
+++ b/include/axp818.h
@@ -41,6 +41,7 @@
#define AXP818_ELDO3_CTRL 0x1b
#define AXP818_FLDO1_CTRL 0x1c
#define AXP818_FLDO2_3_CTRL 0x1d
+#define AXP818_FLDO2_3_CTRL_FLDO3_VOL (1 << 4)
#define AXP818_DCDC1_CTRL 0x20
#define AXP818_DCDC2_CTRL 0x21
#define AXP818_DCDC3_CTRL 0x22
diff --git a/include/axp_pmic.h b/include/axp_pmic.h
index 0f14683..b203cc8 100644
--- a/include/axp_pmic.h
+++ b/include/axp_pmic.h
@@ -31,6 +31,7 @@ int axp_set_aldo3(unsigned int mvolt);
int axp_set_aldo4(unsigned int mvolt);
int axp_set_dldo(int dldo_num, unsigned int mvolt);
int axp_set_eldo(int eldo_num, unsigned int mvolt);
+int axp_set_fldo(int fldo_num, unsigned int mvolt);
int axp_init(void);
int axp_get_sid(unsigned int *sid);

--
2.7.0