diff options
Diffstat (limited to 'arch/arm/boards/karo-tx6x/pmic-rn5t618.c')
| -rw-r--r-- | arch/arm/boards/karo-tx6x/pmic-rn5t618.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/arch/arm/boards/karo-tx6x/pmic-rn5t618.c b/arch/arm/boards/karo-tx6x/pmic-rn5t618.c new file mode 100644 index 0000000000..d5806d27ff --- /dev/null +++ b/arch/arm/boards/karo-tx6x/pmic-rn5t618.c @@ -0,0 +1,156 @@ +/* + * Copyright (C) 2014 Lothar Waßmann <LW@KARO-electronics.de> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <common.h> +#include <i2c/i2c.h> +#include "pmic.h" + +#define RN5T618_NOETIMSET 0x11 +#define RN5T618_LDORTC1_SLOT 0x2a +#define RN5T618_DC1CTL 0x2c +#define RN5T618_DC1CTL2 0x2d +#define RN5T618_DC2CTL 0x2e +#define RN5T618_DC2CTL2 0x2f +#define RN5T618_DC3CTL 0x30 +#define RN5T618_DC3CTL2 0x31 +#define RN5T618_DC1DAC 0x36 /* CORE */ +#define RN5T618_DC2DAC 0x37 /* SOC */ +#define RN5T618_DC3DAC 0x38 /* DDR */ +#define RN5T618_DC1DAC_SLP 0x3b +#define RN5T618_DC2DAC_SLP 0x3c +#define RN5T618_DC3DAC_SLP 0x3d +#define RN5T618_LDOEN1 0x44 +#define RN5T618_LDODIS 0x46 +#define RN5T618_LDOEN2 0x48 +#define RN5T618_LDO3DAC 0x4e /* IO */ +#define RN5T618_LDORTCDAC 0x56 /* VBACKUP */ + +#define VDD_RTC_VAL mV_to_regval_rtc(3000) +#define VDD_HIGH_VAL mV_to_regval3(3000) +#define VDD_HIGH_VAL_LP mV_to_regval3(3000) +#define VDD_CORE_VAL mV_to_regval(1425) /* DCDC1 */ +#define VDD_CORE_VAL_LP mV_to_regval(900) +#define VDD_SOC_VAL mV_to_regval(1425) /* DCDC2 */ +#define VDD_SOC_VAL_LP mV_to_regval(900) +#define VDD_DDR_VAL mV_to_regval(1500) /* DCDC3 */ +#define VDD_DDR_VAL_LP mV_to_regval(1500) + +/* calculate voltages in 10mV */ +#define v2r(v,n,m) DIV_ROUND(((((v) < (n)) ? (n) : (v)) - (n)), (m)) +#define r2v(r,n,m) (((r) * (m) + (n)) / 10) + +/* DCDC1-3 */ +#define mV_to_regval(mV) v2r((mV) * 10, 6000, 125) +#define regval_to_mV(r) r2v(r, 6000, 125) + +/* LDO1-2 */ +#define mV_to_regval2(mV) v2r((mV) * 10, 9000, 250) +#define regval2_to_mV(r) r2v(r, 9000, 250) + +/* LDO3 */ +#define mV_to_regval3(mV) v2r((mV) * 10, 6000, 250) +#define regval3_to_mV(r) r2v(r, 6000, 250) + +/* LDORTC */ +#define mV_to_regval_rtc(mV) v2r((mV) * 10, 17000, 250) +#define regval_rtc_to_mV(r) r2v(r, 17000, 250) + +static struct rn5t618_regs { + u8 addr; + u8 val; + u8 mask; +} rn5t618_regs[] = { + { RN5T618_NOETIMSET, 0, }, + { RN5T618_DC1DAC, VDD_CORE_VAL, }, + { RN5T618_DC2DAC, VDD_SOC_VAL, }, + { RN5T618_DC3DAC, VDD_DDR_VAL, }, + { RN5T618_DC1DAC_SLP, VDD_CORE_VAL_LP, }, + { RN5T618_DC2DAC_SLP, VDD_SOC_VAL_LP, }, + { RN5T618_DC3DAC_SLP, VDD_DDR_VAL_LP, }, + { RN5T618_LDOEN1, 0x01f, ~0x1f, }, + { RN5T618_LDOEN2, 0x10, ~0x30, }, + { RN5T618_LDODIS, 0x00, }, + { RN5T618_LDO3DAC, VDD_HIGH_VAL, }, + { RN5T618_LDORTCDAC, VDD_RTC_VAL, }, + { RN5T618_LDORTC1_SLOT, 0x0f, ~0x3f, }, +}; + +static int rn5t618_setup_regs(struct i2c_client *client, struct rn5t618_regs *r, + size_t count) +{ + int ret; + int i; + + for (i = 0; i < count; i++, r++) { +#ifdef DEBUG + unsigned char value; + + ret = i2c_read_reg(client, r->addr, &value, 1); + if ((value & ~r->mask) != r->val) { + pr_debug("Changing PMIC reg %02x from %02x to %02x\n", + r->addr, value, r->val); + } + if (ret != 1) { + pr_debug("%s: failed to read PMIC register %02x: %d\n", + __func__, r->addr, ret); + return ret; + } +#endif + ret = i2c_write_reg(client, r->addr, &r->val, 1); + if (ret != 1) { + pr_err("%s: failed to write PMIC register %02x: %d\n", + __func__, r->addr, ret); + return ret; + } + } + return 0; +} + +int rn5t618_pmic_setup(struct i2c_client *client) +{ + int ret; + unsigned char value; + + ret = i2c_read_reg(client, 0x11, &value, 1); + if (ret) { + pr_err("i2c read error\n"); + return ret; + } + + ret = rn5t618_setup_regs(client, rn5t618_regs, + ARRAY_SIZE(rn5t618_regs)); + if (ret) + return ret; + + ret = i2c_read_reg(client, RN5T618_DC1DAC, &value, 1); + if (ret == 1) { + pr_debug("VDDCORE set to %umV\n", regval_to_mV(value)); + } else { + pr_err("i2c read error\n"); + return ret; + } + + ret = i2c_read_reg(client, RN5T618_DC2DAC, &value, 1); + if (ret == 1) { + pr_debug("VDDSOC set to %umV\n", regval_to_mV(value)); + } else { + pr_err("i2c read error\n"); + return ret; + } + + return 0; +} |