[U-Boot] [PATCH v3] drivers:power:max77686: add function to set voltage and mode
Piotr Wilczek
p.wilczek at samsung.com
Tue Jun 25 09:59:47 CEST 2013
This patch add new functions to pmic max77686 to set voltage and mode.
Signed-off-by: Piotr Wilczek <p.wilczek at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
CC: Minkyu Kang <mk7.kang at samsung.com>
CC: Rajeshwari Shinde <rajeshwari.s at samsung.com>
Acked-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
Changes in v3:
- removed magic values
- used ARRAY_SIZE() for array size calculation
- used switch case instead if else if
- added return when pmic read error occurs
Changes in v2:
- changed printf to debug
drivers/power/pmic/pmic_max77686.c | 192 ++++++++++++++++++++++++++++++++++++
include/power/max77686_pmic.h | 26 +++++
2 files changed, 218 insertions(+)
diff --git a/drivers/power/pmic/pmic_max77686.c b/drivers/power/pmic/pmic_max77686.c
index 7fcb4c0..3960ca9 100644
--- a/drivers/power/pmic/pmic_max77686.c
+++ b/drivers/power/pmic/pmic_max77686.c
@@ -30,6 +30,198 @@
DECLARE_GLOBAL_DATA_PTR;
+static const char max77686_buck_addr[] = {
+ 0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
+};
+
+static unsigned int max77686_ldo_volt2hex(int ldo, ulong uV)
+{
+ unsigned int hex = 0;
+
+ switch (ldo) {
+ case 1:
+ case 2:
+ case 6:
+ case 7:
+ case 8:
+ case 15:
+ hex = (uV - 800000) / 25000;
+ break;
+ default:
+ hex = (uV - 800000) / 50000;
+ }
+
+ if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
+ return hex;
+
+ debug("%s: %ld is wrong voltage value for LDO%d\n", __func__, uV, ldo);
+ return 0;
+}
+
+int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV)
+{
+ unsigned int val, ret, hex, adr;
+
+ if (ldo < 1 && ldo > 26) {
+ printf("%s: %d is wrong ldo number\n", __func__, ldo);
+ return -1;
+ }
+
+ adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
+ hex = max77686_ldo_volt2hex(ldo, uV);
+
+ if (!hex)
+ return -1;
+
+ ret = pmic_reg_read(p, adr, &val);
+ if (ret)
+ return ret;
+
+ val &= ~MAX77686_LDO_VOLT_MASK;
+ val |= hex;
+ ret |= pmic_reg_write(p, adr, val);
+
+ return ret;
+}
+
+int max77686_set_ldo_mode(struct pmic *p, int ldo, char opmode)
+{
+ unsigned int val, ret, adr, mode;
+
+ if (ldo < 1 && 26 < ldo) {
+ printf("%s: %d is wrong ldo number\n", __func__, ldo);
+ return -1;
+ }
+
+ adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
+
+ /* mode */
+ switch (opmode) {
+ case OPMODE_OFF:
+ mode = MAX77686_LDO_MODE_OFF;
+ break;
+ case OPMODE_STANDBY:
+ switch (ldo) {
+ case 2:
+ case 6:
+ case 7:
+ case 8:
+ case 10:
+ case 11:
+ case 12:
+ case 14:
+ case 15:
+ case 16:
+ mode = MAX77686_LDO_MODE_STANDBY;
+ break;
+ default:
+ mode = 0xff;
+ }
+ break;
+ case OPMODE_LPM:
+ mode = MAX77686_LDO_MODE_LPM;
+ break;
+ case OPMODE_ON:
+ mode = MAX77686_LDO_MODE_ON;
+ break;
+ default:
+ mode = 0xff;
+ }
+
+ if (mode == 0xff) {
+ printf("%s: %d is not supported on LDO%d\n",
+ __func__, opmode, ldo);
+ return -1;
+ }
+
+ ret = pmic_reg_read(p, adr, &val);
+ if (ret)
+ return ret;
+
+ val &= ~MAX77686_LDO_MODE_MASK;
+ val |= mode;
+ ret |= pmic_reg_write(p, adr, val);
+
+ return ret;
+}
+
+int max77686_set_buck_mode(struct pmic *p, int buck, char opmode)
+{
+ unsigned int val, ret, mask, adr, size, mode, mode_shift;
+
+ size = ARRAY_SIZE(max77686_buck_addr);
+ if (buck >= size) {
+ printf("%s: %d is wrong buck number\n", __func__, buck);
+ return -1;
+ }
+
+ adr = max77686_buck_addr[buck];
+
+ /* mask */
+ switch (buck) {
+ case 2:
+ case 3:
+ case 4:
+ mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
+ break;
+ default:
+ mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
+ }
+
+ mask = MAX77686_BUCK_MODE_MASK << mode_shift;
+
+ /* mode */
+ switch (opmode) {
+ case OPMODE_OFF:
+ mode = MAX77686_BUCK_MODE_OFF;
+ break;
+ case OPMODE_STANDBY:
+ switch (buck) {
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
+ break;
+ default:
+ mode = 0xff;
+ }
+ break;
+ case OPMODE_LPM:
+ switch (buck) {
+ case 2:
+ case 3:
+ case 4:
+ mode = MAX77686_BUCK_MODE_LPM << mode_shift;
+ break;
+ default:
+ mode = 0xff;
+ }
+ break;
+ case OPMODE_ON:
+ mode = MAX77686_BUCK_MODE_ON << mode_shift;
+ break;
+ default:
+ mode = 0xff;
+ }
+
+ if (mode == 0xff) {
+ printf("%s: %d is not supported on BUCK%d\n",
+ __func__, opmode, buck);
+ return -1;
+ }
+
+ ret = pmic_reg_read(p, adr, &val);
+ if (ret)
+ return ret;
+
+ val &= ~mask;
+ val |= mode;
+ ret |= pmic_reg_write(p, adr, val);
+
+ return ret;
+}
+
int pmic_init(unsigned char bus)
{
static const char name[] = "MAX77686_PMIC";
diff --git a/include/power/max77686_pmic.h b/include/power/max77686_pmic.h
index 1c374a9..7339a3e 100644
--- a/include/power/max77686_pmic.h
+++ b/include/power/max77686_pmic.h
@@ -155,6 +155,32 @@ enum {
EN_LDO = (0x3 << 6),
};
+enum {
+ OPMODE_OFF = 0,
+ OPMODE_STANDBY,
+ OPMODE_LPM,
+ OPMODE_ON,
+};
+
+int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV);
+int max77686_set_ldo_mode(struct pmic *p, int ldo, char opmode);
+int max77686_set_buck_mode(struct pmic *p, int buck, char opmode);
+
+#define MAX77686_LDO_VOLT_MAX_HEX 0x3f
+#define MAX77686_LDO_VOLT_MASK 0x3f
+#define MAX77686_LDO_MODE_MASK 0xc0
+#define MAX77686_LDO_MODE_OFF (0x00 << 0x06)
+#define MAX77686_LDO_MODE_STANDBY (0x01 << 0x06)
+#define MAX77686_LDO_MODE_LPM (0x02 << 0x06)
+#define MAX77686_LDO_MODE_ON (0x03 << 0x06)
+#define MAX77686_BUCK_MODE_MASK 0x03
+#define MAX77686_BUCK_MODE_SHIFT_1 0x00
+#define MAX77686_BUCK_MODE_SHIFT_2 0x04
+#define MAX77686_BUCK_MODE_OFF 0x00
+#define MAX77686_BUCK_MODE_STANDBY 0x01
+#define MAX77686_BUCK_MODE_LPM 0x02
+#define MAX77686_BUCK_MODE_ON 0x03
+
/* Buck1 1 volt value */
#define MAX77686_BUCK1OUT_1V 0x5
/* Buck1 1.05 volt value */
--
1.7.9.5
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