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authorHenrik Nordstrom <henrik@henriknordstrom.net>2014-06-13 22:55:50 +0200
committerIan Campbell <ijc@hellion.org.uk>2014-07-18 19:42:10 +0100
commit14bc66bd9a1d8073a12c6e785ab379909f620356 (patch)
tree6c3afe5e3736d14bae914b2f2b03996122233f2b /drivers/power
parent6620377e4b8be3c232c59d673efcd673c30bc69f (diff)
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sunxi: Add axp209 pmic support
Add support for the x-powers axp209 pmic which is found on most A10, A13 and A20 boards. And enable AXP209 support for the Cubietruck and Cubieboard boards. Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/Makefile1
-rw-r--r--drivers/power/axp209.c167
2 files changed, 168 insertions, 0 deletions
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 53ff97d..063ac8f 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -5,6 +5,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-$(CONFIG_AXP209_POWER) += axp209.o
obj-$(CONFIG_EXYNOS_TMU) += exynos-tmu.o
obj-$(CONFIG_FTPMU010_POWER) += ftpmu010.o
obj-$(CONFIG_TPS6586X_POWER) += tps6586x.o
diff --git a/drivers/power/axp209.c b/drivers/power/axp209.c
new file mode 100644
index 0000000..9798e5b
--- /dev/null
+++ b/drivers/power/axp209.c
@@ -0,0 +1,167 @@
+/*
+ * (C) Copyright 2012
+ * Henrik Nordstrom <henrik@henriknordstrom.net>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <axp209.h>
+
+enum axp209_reg {
+ AXP209_POWER_STATUS = 0x00,
+ AXP209_CHIP_VERSION = 0x03,
+ AXP209_DCDC2_VOLTAGE = 0x23,
+ AXP209_DCDC3_VOLTAGE = 0x27,
+ AXP209_LDO24_VOLTAGE = 0x28,
+ AXP209_LDO3_VOLTAGE = 0x29,
+ AXP209_IRQ_STATUS5 = 0x4c,
+ AXP209_SHUTDOWN = 0x32,
+};
+
+#define AXP209_POWER_STATUS_ON_BY_DC (1 << 0)
+
+#define AXP209_IRQ5_PEK_UP (1 << 6)
+#define AXP209_IRQ5_PEK_DOWN (1 << 5)
+
+#define AXP209_POWEROFF (1 << 7)
+
+static int axp209_write(enum axp209_reg reg, u8 val)
+{
+ return i2c_write(0x34, reg, 1, &val, 1);
+}
+
+static int axp209_read(enum axp209_reg reg, u8 *val)
+{
+ return i2c_read(0x34, reg, 1, val, 1);
+}
+
+static u8 axp209_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 axp209_set_dcdc2(int mvolt)
+{
+ int rc;
+ u8 cfg, current;
+
+ cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
+
+ /* Do we really need to be this gentle? It has built-in voltage slope */
+ while ((rc = axp209_read(AXP209_DCDC2_VOLTAGE, &current)) == 0 &&
+ current != cfg) {
+ if (current < cfg)
+ current++;
+ else
+ current--;
+
+ rc = axp209_write(AXP209_DCDC2_VOLTAGE, current);
+ if (rc)
+ break;
+ }
+
+ return rc;
+}
+
+int axp209_set_dcdc3(int mvolt)
+{
+ u8 cfg = axp209_mvolt_to_cfg(mvolt, 700, 3500, 25);
+
+ return axp209_write(AXP209_DCDC3_VOLTAGE, cfg);
+}
+
+int axp209_set_ldo2(int mvolt)
+{
+ int rc;
+ u8 cfg, reg;
+
+ cfg = axp209_mvolt_to_cfg(mvolt, 1800, 3300, 100);
+
+ rc = axp209_read(AXP209_LDO24_VOLTAGE, &reg);
+ if (rc)
+ return rc;
+
+ /* LDO2 configuration is in upper 4 bits */
+ reg = (reg & 0x0f) | (cfg << 4);
+ return axp209_write(AXP209_LDO24_VOLTAGE, reg);
+}
+
+int axp209_set_ldo3(int mvolt)
+{
+ u8 cfg;
+
+ if (mvolt == -1)
+ cfg = 0x80; /* determined by LDO3IN pin */
+ else
+ cfg = axp209_mvolt_to_cfg(mvolt, 700, 2275, 25);
+
+ return axp209_write(AXP209_LDO3_VOLTAGE, cfg);
+}
+
+int axp209_set_ldo4(int mvolt)
+{
+ int rc;
+ static const int vindex[] = {
+ 1250, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 2500,
+ 2700, 2800, 3000, 3100, 3200, 3300
+ };
+ u8 cfg, reg;
+
+ /* Translate mvolt to register cfg value, requested <= selected */
+ for (cfg = 15; vindex[cfg] > mvolt && cfg > 0; cfg--);
+
+ rc = axp209_read(AXP209_LDO24_VOLTAGE, &reg);
+ if (rc)
+ return rc;
+
+ /* LDO4 configuration is in lower 4 bits */
+ reg = (reg & 0xf0) | (cfg << 0);
+ return axp209_write(AXP209_LDO24_VOLTAGE, reg);
+}
+
+int axp209_init(void)
+{
+ u8 ver;
+ int rc;
+
+ rc = axp209_read(AXP209_CHIP_VERSION, &ver);
+ if (rc)
+ return rc;
+
+ /* Low 4 bits is chip version */
+ ver &= 0x0f;
+
+ if (ver != 0x1)
+ return -1;
+
+ return 0;
+}
+
+int axp209_poweron_by_dc(void)
+{
+ u8 v;
+
+ if (axp209_read(AXP209_POWER_STATUS, &v))
+ return 0;
+
+ return (v & AXP209_POWER_STATUS_ON_BY_DC);
+}
+
+int axp209_power_button(void)
+{
+ u8 v;
+
+ if (axp209_read(AXP209_IRQ_STATUS5, &v))
+ return 0;
+
+ axp209_write(AXP209_IRQ_STATUS5, AXP209_IRQ5_PEK_DOWN);
+
+ return v & AXP209_IRQ5_PEK_DOWN;
+}