Function for calculating LDO internal register value from passed micro Volt.
Signed-off-by: Lukasz Majewski l.majewski@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com Cc: Stefano Babic sbabic@denx.de --- Changes for v2: - MAX8997_LDO_MAX_VAL defined Changes for v3: - None Changes for v4: - None --- drivers/power/pmic/pmic_max8997.c | 16 ++++++++++++++++ include/power/max8997_pmic.h | 2 ++ 2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/drivers/power/pmic/pmic_max8997.c b/drivers/power/pmic/pmic_max8997.c index 4e8283a..47ef7f6 100644 --- a/drivers/power/pmic/pmic_max8997.c +++ b/drivers/power/pmic/pmic_max8997.c @@ -26,6 +26,22 @@ #include <power/max8997_pmic.h> #include <i2c.h>
+unsigned char max8997_reg_ldo(int uV) +{ + unsigned char ret; + if (uV <= 800000) + return 0; + if (uV >= 3950000) + return MAX8997_LDO_MAX_VAL; + ret = (uV - 800000) / 50000; + if (ret > MAX8997_LDO_MAX_VAL) { + printf("MAX8997 LDO SETTING ERROR (%duV) -> %u\n", uV, ret); + ret = MAX8997_LDO_MAX_VAL; + } + + return ret; +} + int pmic_init(unsigned char bus) { struct pmic *p = pmic_alloc(); diff --git a/include/power/max8997_pmic.h b/include/power/max8997_pmic.h index 1db7deb..03cac04 100644 --- a/include/power/max8997_pmic.h +++ b/include/power/max8997_pmic.h @@ -200,4 +200,6 @@ enum { EN_LDO = (0x3 << 6), };
+#define MAX8997_LDO_MAX_VAL 0x3F +unsigned char max8997_reg_ldo(int uV); #endif /* __MAX8997_PMIC_H_ */