sunxi: power: add AXP809 support

The A80 uses the AXP809 as its primary PMIC.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

1 files changed, 238 insertions, 0 deletions

diff --git a/drivers/power/axp809.c b/drivers/power/axp809.c
new file mode 100644
index 0000000000..c8b76cf9b7
--- /dev/null
+++ b/drivers/power/axp809.c
@@ -0,0 +1,238 @@
+/*
+ * AXP809 driver based on AXP221 driver
+ *
+ *
+ * (C) Copyright 2016 Chen-Yu Tsai <wens@csie.org>
+ *
+ * Based on axp221.c
+ * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
+ * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/pmic_bus.h>
+#include <axp_pmic.h>
+
+static u8 axp809_mvolt_to_cfg(int mvolt, int min, int max, int div)
+{
+	if (mvolt < min)
+		mvolt = min;
+	else if (mvolt > max)
+		mvolt = max;
+
+	return (mvolt - min) / div;
+}
+
+int axp_set_dcdc1(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 1600, 3400, 100);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC1_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC1_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	ret = pmic_bus_setbits(AXP809_OUTPUT_CTRL2,
+			       AXP809_OUTPUT_CTRL2_DC1SW_EN);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC1_EN);
+}
+
+int axp_set_dcdc2(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 600, 1540, 20);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC2_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC2_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC2_EN);
+}
+
+int axp_set_dcdc3(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 600, 1860, 20);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC3_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC3_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC3_EN);
+}
+
+int axp_set_dcdc4(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 600, 1540, 20);
+
+	if (mvolt >= 1540)
+		cfg = 0x30 + axp809_mvolt_to_cfg(mvolt, 1800, 2600, 100);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC4_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC5_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC4_EN);
+}
+
+int axp_set_dcdc5(unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 1000, 2550, 50);
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+					AXP809_OUTPUT_CTRL1_DCDC5_EN);
+
+	ret = pmic_bus_write(AXP809_DCDC5_CTRL, cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_DCDC5_EN);
+}
+
+int axp_set_aldo(int aldo_num, unsigned int mvolt)
+{
+	int ret;
+	u8 cfg;
+
+	if (aldo_num < 1 || aldo_num > 3)
+		return -EINVAL;
+
+	if (mvolt == 0 && aldo_num == 3)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL2,
+					AXP809_OUTPUT_CTRL2_ALDO3_EN);
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_ALDO1_EN << (aldo_num - 1));
+
+	cfg = axp809_mvolt_to_cfg(mvolt, 700, 3300, 100);
+	ret = pmic_bus_write(AXP809_ALDO1_CTRL + (aldo_num - 1), cfg);
+	if (ret)
+		return ret;
+
+	if (aldo_num == 3)
+		return pmic_bus_setbits(AXP809_OUTPUT_CTRL2,
+					AXP809_OUTPUT_CTRL2_ALDO3_EN);
+	return pmic_bus_clrbits(AXP809_OUTPUT_CTRL1,
+				AXP809_OUTPUT_CTRL1_ALDO1_EN << (aldo_num - 1));
+}
+
+/* TODO: re-work other AXP drivers to consolidate ALDO functions. */
+int axp_set_aldo1(unsigned int mvolt)
+{
+	return axp_set_aldo(1, mvolt);
+}
+
+int axp_set_aldo2(unsigned int mvolt)
+{
+	return axp_set_aldo(2, mvolt);
+}
+
+int axp_set_aldo3(unsigned int mvolt)
+{
+	return axp_set_aldo(3, mvolt);
+}
+
+int axp_set_dldo(int dldo_num, unsigned int mvolt)
+{
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 700, 3300, 100);
+	int ret;
+
+	if (dldo_num < 1 || dldo_num > 2)
+		return -EINVAL;
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL2,
+				AXP809_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
+
+	if (dldo_num == 1 && mvolt > 3300)
+		cfg += 1 + axp809_mvolt_to_cfg(mvolt, 3400, 4200, 200);
+	ret = pmic_bus_write(AXP809_DLDO1_CTRL + (dldo_num - 1), cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL2,
+				AXP809_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
+}
+
+int axp_set_eldo(int eldo_num, unsigned int mvolt)
+{
+	int ret;
+	u8 cfg = axp809_mvolt_to_cfg(mvolt, 700, 3300, 100);
+
+	if (eldo_num < 1 || eldo_num > 3)
+		return -EINVAL;
+
+	if (mvolt == 0)
+		return pmic_bus_clrbits(AXP809_OUTPUT_CTRL2,
+				AXP809_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
+
+	ret = pmic_bus_write(AXP809_ELDO1_CTRL + (eldo_num - 1), cfg);
+	if (ret)
+		return ret;
+
+	return pmic_bus_setbits(AXP809_OUTPUT_CTRL2,
+				AXP809_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
+}
+
+int axp_set_sw(bool on)
+{
+	if (on)
+		return pmic_bus_setbits(AXP809_OUTPUT_CTRL2,
+					AXP809_OUTPUT_CTRL2_SWOUT_EN);
+
+	return pmic_bus_clrbits(AXP809_OUTPUT_CTRL2,
+				AXP809_OUTPUT_CTRL2_SWOUT_EN);
+}
+
+int axp_init(void)
+{
+	int ret;
+
+	ret = pmic_bus_init();
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	pmic_bus_write(AXP809_SHUTDOWN, AXP809_SHUTDOWN_POWEROFF);
+
+	/* infinite loop during shutdown */
+	while (1) {}
+
+	/* not reached */
+	return 0;
+}