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authorPiotr Wilczek <p.wilczek@samsung.com>2013-06-25 09:59:47 +0200
committerMinkyu Kang <mk7.kang@samsung.com>2013-08-30 12:24:54 +0900
commit812d7576cdbecc12d7eec7b533333d3a4a06234b (patch)
treea9bd6c618267e2d6ff64abe328e0755f84c78714 /drivers/power
parentcc2b1012cbdb0422fc96d6e6c813baed0722f373 (diff)
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drivers:power:max77686: add function to set voltage and mode
This patch add new functions to pmic max77686 to set voltage and mode. Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Rajeshwari Shinde <rajeshwari.s@samsung.com> Acked-by: Tom Rini <trini@ti.com> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/pmic/pmic_max77686.c192
1 files changed, 192 insertions, 0 deletions
diff --git a/drivers/power/pmic/pmic_max77686.c b/drivers/power/pmic/pmic_max77686.c
index 7208e5b..d4c430e 100644
--- a/drivers/power/pmic/pmic_max77686.c
+++ b/drivers/power/pmic/pmic_max77686.c
@@ -14,6 +14,198 @@
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";