The TX6 boards come with 3 different PMIC variants from which we currently only support the ltc3673. Detect the other two by i2c address and set them up correctly. The code is based on the karo U-Boot port. Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- arch/arm/boards/karo-tx6x/Makefile | 1 + arch/arm/boards/karo-tx6x/board.c | 167 +++++++------------------------ arch/arm/boards/karo-tx6x/pmic-ltc3676.c | 149 +++++++++++++++++++++++++++ arch/arm/boards/karo-tx6x/pmic-rn5t567.c | 154 ++++++++++++++++++++++++++++ arch/arm/boards/karo-tx6x/pmic-rn5t618.c | 152 ++++++++++++++++++++++++++++ arch/arm/boards/karo-tx6x/pmic.h | 8 ++ 6 files changed, 501 insertions(+), 130 deletions(-) create mode 100644 arch/arm/boards/karo-tx6x/pmic-ltc3676.c create mode 100644 arch/arm/boards/karo-tx6x/pmic-rn5t567.c create mode 100644 arch/arm/boards/karo-tx6x/pmic-rn5t618.c create mode 100644 arch/arm/boards/karo-tx6x/pmic.h diff --git a/arch/arm/boards/karo-tx6x/Makefile b/arch/arm/boards/karo-tx6x/Makefile index 01c7a25..51b7c2d 100644 --- a/arch/arm/boards/karo-tx6x/Makefile +++ b/arch/arm/boards/karo-tx6x/Makefile @@ -1,2 +1,3 @@ obj-y += board.o lwl-y += lowlevel.o +obj-y += pmic-ltc3676.o pmic-rn5t567.o pmic-rn5t618.o diff --git a/arch/arm/boards/karo-tx6x/board.c b/arch/arm/boards/karo-tx6x/board.c index b955b81..6cb4689 100644 --- a/arch/arm/boards/karo-tx6x/board.c +++ b/arch/arm/boards/karo-tx6x/board.c @@ -26,122 +26,40 @@ #include <mach/bbu.h> #include <mach/imx6.h> #include <mfd/imx6q-iomuxc-gpr.h> +#include "pmic.h" #define ETH_PHY_RST IMX_GPIO_NR(7, 6) #define ETH_PHY_PWR IMX_GPIO_NR(3, 20) #define ETH_PHY_INT IMX_GPIO_NR(7, 1) -#define DIV_ROUND(n,d) (((n) + ((d)/2)) / (d)) - -#define LTC3676_BUCK1 0x01 -#define LTC3676_BUCK2 0x02 -#define LTC3676_BUCK3 0x03 -#define LTC3676_BUCK4 0x04 -#define LTC3676_DVB1A 0x0A -#define LTC3676_DVB1B 0x0B -#define LTC3676_DVB2A 0x0C -#define LTC3676_DVB2B 0x0D -#define LTC3676_DVB3A 0x0E -#define LTC3676_DVB3B 0x0F -#define LTC3676_DVB4A 0x10 -#define LTC3676_DVB4B 0x11 -#define LTC3676_MSKPG 0x13 -#define LTC3676_CLIRQ 0x1f - -#define LTC3676_BUCK_DVDT_FAST (1 << 0) -#define LTC3676_BUCK_KEEP_ALIVE (1 << 1) -#define LTC3676_BUCK_CLK_RATE_LOW (1 << 2) -#define LTC3676_BUCK_PHASE_SEL (1 << 3) -#define LTC3676_BUCK_ENABLE_300 (1 << 4) -#define LTC3676_BUCK_PULSE_SKIP (0 << 5) -#define LTC3676_BUCK_BURST_MODE (1 << 5) -#define LTC3676_BUCK_CONTINUOUS (2 << 5) -#define LTC3676_BUCK_ENABLE (1 << 7) - -#define LTC3676_PGOOD_MASK (1 << 5) - -#define LTC3676_MSKPG_BUCK1 (1 << 0) -#define LTC3676_MSKPG_BUCK2 (1 << 1) -#define LTC3676_MSKPG_BUCK3 (1 << 2) -#define LTC3676_MSKPG_BUCK4 (1 << 3) -#define LTC3676_MSKPG_LDO2 (1 << 5) -#define LTC3676_MSKPG_LDO3 (1 << 6) -#define LTC3676_MSKPG_LDO4 (1 << 7) - -#define VDD_IO_VAL mV_to_regval(vout_to_vref(3300 * 10, 5)) -#define VDD_IO_VAL_LP mV_to_regval(vout_to_vref(3100 * 10, 5)) -#define VDD_IO_VAL_2 mV_to_regval(vout_to_vref(3300 * 10, 5_2)) -#define VDD_IO_VAL_2_LP mV_to_regval(vout_to_vref(3100 * 10, 5_2)) -#define VDD_SOC_VAL mV_to_regval(vout_to_vref(1425 * 10, 6)) -#define VDD_SOC_VAL_LP mV_to_regval(vout_to_vref(900 * 10, 6)) -#define VDD_DDR_VAL mV_to_regval(vout_to_vref(1500 * 10, 7)) -#define VDD_DDR_VAL_LP mV_to_regval(vout_to_vref(1500 * 10, 7)) -#define VDD_CORE_VAL mV_to_regval(vout_to_vref(1425 * 10, 8)) -#define VDD_CORE_VAL_LP mV_to_regval(vout_to_vref(900 * 10, 8)) - -/* LDO1 */ -#define R1_1 470 -#define R2_1 150 -/* LDO4 */ -#define R1_4 470 -#define R2_4 150 -/* Buck1 */ -#define R1_5 390 -#define R2_5 110 -#define R1_5_2 470 -#define R2_5_2 150 -/* Buck2 (SOC) */ -#define R1_6 150 -#define R2_6 180 -/* Buck3 (DDR) */ -#define R1_7 150 -#define R2_7 140 -/* Buck4 (CORE) */ -#define R1_8 150 -#define R2_8 180 - -/* calculate voltages in 10mV */ -#define R1(idx) R1_##idx -#define R2(idx) R2_##idx - -#define vout_to_vref(vout, idx) ((vout) * R2(idx) / (R1(idx) + R2(idx))) -#define vref_to_vout(vref, idx) DIV_ROUND_UP((vref) * (R1(idx) + R2(idx)), R2(idx)) - -#define mV_to_regval(mV) DIV_ROUND(((((mV) < 4125) ? 4125 : (mV)) - 4125), 125) -#define regval_to_mV(v) (((v) * 125 + 4125)) - -static struct ltc3673_regs { - u8 addr; - u8 val; - u8 mask; -} ltc3676_regs[] = { - { LTC3676_MSKPG, ~LTC3676_MSKPG_BUCK1, }, - { LTC3676_DVB2B, VDD_SOC_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, }, - { LTC3676_DVB3B, VDD_DDR_VAL_LP, ~0x3f, }, - { LTC3676_DVB4B, VDD_CORE_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, }, - { LTC3676_DVB2A, VDD_SOC_VAL, ~0x3f, }, - { LTC3676_DVB3A, VDD_DDR_VAL, ~0x3f, }, - { LTC3676_DVB4A, VDD_CORE_VAL, ~0x3f, }, - { LTC3676_BUCK1, LTC3676_BUCK_BURST_MODE | LTC3676_BUCK_CLK_RATE_LOW, }, - { LTC3676_BUCK2, LTC3676_BUCK_BURST_MODE, }, - { LTC3676_BUCK3, LTC3676_BUCK_BURST_MODE, }, - { LTC3676_BUCK4, LTC3676_BUCK_BURST_MODE, }, - { LTC3676_CLIRQ, 0, }, /* clear interrupt status */ -}; -static struct ltc3673_regs ltc3676_regs_2[] = { - { LTC3676_DVB1B, VDD_IO_VAL_2_LP | LTC3676_PGOOD_MASK, ~0x3f, }, - { LTC3676_DVB1A, VDD_IO_VAL_2, ~0x3f, }, -}; +static void eth_init(void) +{ + void __iomem *iomux = (void *)MX6_IOMUXC_BASE_ADDR; + uint32_t val; + + val = readl(iomux + IOMUXC_GPR1); + val |= IMX6Q_GPR1_ENET_CLK_SEL_ANATOP; + writel(val, iomux + IOMUXC_GPR1); +} +static struct { + unsigned char addr; + int (*init)(struct i2c_client *client); + const char *name; +} i2c_addrs[] = { + { 0x3c, ltc3676_pmic_setup, "ltc3676" }, + { 0x32, rn5t618_pmic_setup, "rn5t618" }, + { 0x33, rn5t567_pmic_setup, "rn5t567" }, +}; -static int setup_pmic_voltages(void) +int setup_pmic_voltages(void) { - struct i2c_adapter *adapter = NULL; + struct i2c_adapter *adapter; struct i2c_client client; - int addr = 0x3c; - int bus = 0; + int ret = -ENODEV; int i; - struct ltc3673_regs *r; + int bus = 0; + uint8_t reg; adapter = i2c_get_adapter(bus); if (!adapter) { @@ -150,37 +68,26 @@ static int setup_pmic_voltages(void) } client.adapter = adapter; - client.addr = addr; - r = ltc3676_regs; + for (i = 0; i < ARRAY_SIZE(i2c_addrs); i++) { + client.addr = i2c_addrs[i].addr; - for (i = 0; i < ARRAY_SIZE(ltc3676_regs); i++, r++) { - if (i2c_write_reg(&client, r->addr, &r->val, 1) != 1) { - pr_err("i2c write error\n"); - return -EIO; - } - } + pr_debug("Probing for I2C dev 0x%02x\n", client.addr); - r = ltc3676_regs_2; - - for (i = 0; i < ARRAY_SIZE(ltc3676_regs_2); i++, r++) { - if (i2c_write_reg(&client, r->addr, &r->val, 1) != 1) { - pr_err("i2c write error\n"); - return -EIO; + ret = i2c_write_reg(&client, 0x00, ®, 0); + if (ret == 0) { + pr_info("Detected %s PMIC\n", i2c_addrs[i].name); + ret = i2c_addrs[i].init(&client); + goto out; } } - return 0; -} + pr_err("No PMIC found\n"); +out: + if (ret) + pr_err("PMIC setup failed with %s\n", strerror(-ret)); -static void eth_init(void) -{ - void __iomem *iomux = (void *)MX6_IOMUXC_BASE_ADDR; - uint32_t val; - - val = readl(iomux + IOMUXC_GPR1); - val |= IMX6Q_GPR1_ENET_CLK_SEL_ANATOP; - writel(val, iomux + IOMUXC_GPR1); + return ret; } #define IMX6_SRC_SBMR1 0x04 diff --git a/arch/arm/boards/karo-tx6x/pmic-ltc3676.c b/arch/arm/boards/karo-tx6x/pmic-ltc3676.c new file mode 100644 index 0000000..0cddb92 --- /dev/null +++ b/arch/arm/boards/karo-tx6x/pmic-ltc3676.c @@ -0,0 +1,149 @@ +/* + * Copyright (C) 2014 Lothar Waßmann <LW@xxxxxxxxxxxxxxxxxxx> + * + * 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 LTC3676_BUCK1 0x01 +#define LTC3676_BUCK2 0x02 +#define LTC3676_BUCK3 0x03 +#define LTC3676_BUCK4 0x04 +#define LTC3676_DVB1A 0x0A +#define LTC3676_DVB1B 0x0B +#define LTC3676_DVB2A 0x0C +#define LTC3676_DVB2B 0x0D +#define LTC3676_DVB3A 0x0E +#define LTC3676_DVB3B 0x0F +#define LTC3676_DVB4A 0x10 +#define LTC3676_DVB4B 0x11 +#define LTC3676_MSKPG 0x13 +#define LTC3676_CLIRQ 0x1f + +#define LTC3676_BUCK_DVDT_FAST (1 << 0) +#define LTC3676_BUCK_KEEP_ALIVE (1 << 1) +#define LTC3676_BUCK_CLK_RATE_LOW (1 << 2) +#define LTC3676_BUCK_PHASE_SEL (1 << 3) +#define LTC3676_BUCK_ENABLE_300 (1 << 4) +#define LTC3676_BUCK_PULSE_SKIP (0 << 5) +#define LTC3676_BUCK_BURST_MODE (1 << 5) +#define LTC3676_BUCK_CONTINUOUS (2 << 5) +#define LTC3676_BUCK_ENABLE (1 << 7) + +#define LTC3676_PGOOD_MASK (1 << 5) + +#define LTC3676_MSKPG_BUCK1 (1 << 0) +#define LTC3676_MSKPG_BUCK2 (1 << 1) +#define LTC3676_MSKPG_BUCK3 (1 << 2) +#define LTC3676_MSKPG_BUCK4 (1 << 3) +#define LTC3676_MSKPG_LDO2 (1 << 5) +#define LTC3676_MSKPG_LDO3 (1 << 6) +#define LTC3676_MSKPG_LDO4 (1 << 7) + +#define VDD_IO_VAL mV_to_regval(vout_to_vref(3300 * 10, 5)) +#define VDD_IO_VAL_LP mV_to_regval(vout_to_vref(3100 * 10, 5)) +#define VDD_IO_VAL_2 mV_to_regval(vout_to_vref(3300 * 10, 5_2)) +#define VDD_IO_VAL_2_LP mV_to_regval(vout_to_vref(3100 * 10, 5_2)) +#define VDD_SOC_VAL mV_to_regval(vout_to_vref(1425 * 10, 6)) +#define VDD_SOC_VAL_LP mV_to_regval(vout_to_vref(900 * 10, 6)) +#define VDD_DDR_VAL mV_to_regval(vout_to_vref(1500 * 10, 7)) +#define VDD_DDR_VAL_LP mV_to_regval(vout_to_vref(1500 * 10, 7)) +#define VDD_CORE_VAL mV_to_regval(vout_to_vref(1425 * 10, 8)) +#define VDD_CORE_VAL_LP mV_to_regval(vout_to_vref(900 * 10, 8)) + +/* LDO1 */ +#define R1_1 470 +#define R2_1 150 +/* LDO4 */ +#define R1_4 470 +#define R2_4 150 +/* Buck1 */ +#define R1_5 390 +#define R2_5 110 +#define R1_5_2 470 +#define R2_5_2 150 +/* Buck2 (SOC) */ +#define R1_6 150 +#define R2_6 180 +/* Buck3 (DDR) */ +#define R1_7 150 +#define R2_7 140 +/* Buck4 (CORE) */ +#define R1_8 150 +#define R2_8 180 + +/* calculate voltages in 10mV */ +#define R1(idx) R1_##idx +#define R2(idx) R2_##idx + +#define vout_to_vref(vout, idx) ((vout) * R2(idx) / (R1(idx) + R2(idx))) +#define vref_to_vout(vref, idx) DIV_ROUND_UP((vref) * (R1(idx) + R2(idx)), R2(idx)) + +#define mV_to_regval(mV) DIV_ROUND(((((mV) < 4125) ? 4125 : (mV)) - 4125), 125) +#define regval_to_mV(v) (((v) * 125 + 4125)) + +static struct ltc3673_regs { + u8 addr; + u8 val; + u8 mask; +} ltc3676_regs[] = { + { LTC3676_MSKPG, ~LTC3676_MSKPG_BUCK1, }, + { LTC3676_DVB2B, VDD_SOC_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, }, + { LTC3676_DVB3B, VDD_DDR_VAL_LP, ~0x3f, }, + { LTC3676_DVB4B, VDD_CORE_VAL_LP | LTC3676_PGOOD_MASK, ~0x3f, }, + { LTC3676_DVB2A, VDD_SOC_VAL, ~0x3f, }, + { LTC3676_DVB3A, VDD_DDR_VAL, ~0x3f, }, + { LTC3676_DVB4A, VDD_CORE_VAL, ~0x3f, }, + { LTC3676_BUCK1, LTC3676_BUCK_BURST_MODE | LTC3676_BUCK_CLK_RATE_LOW, }, + { LTC3676_BUCK2, LTC3676_BUCK_BURST_MODE, }, + { LTC3676_BUCK3, LTC3676_BUCK_BURST_MODE, }, + { LTC3676_BUCK4, LTC3676_BUCK_BURST_MODE, }, + { LTC3676_CLIRQ, 0, }, /* clear interrupt status */ +}; + +static struct ltc3673_regs ltc3676_regs_2[] = { + { LTC3676_DVB1B, VDD_IO_VAL_2_LP | LTC3676_PGOOD_MASK, ~0x3f, }, + { LTC3676_DVB1A, VDD_IO_VAL_2, ~0x3f, }, +}; + + +int ltc3676_pmic_setup(struct i2c_client *client) +{ + int i; + struct ltc3673_regs *r; + + r = ltc3676_regs; + + for (i = 0; i < ARRAY_SIZE(ltc3676_regs); i++, r++) { + if (i2c_write_reg(client, r->addr, &r->val, 1) != 1) { + pr_err("i2c write error\n"); + return -EIO; + } + } + + r = ltc3676_regs_2; + + for (i = 0; i < ARRAY_SIZE(ltc3676_regs_2); i++, r++) { + if (i2c_write_reg(client, r->addr, &r->val, 1) != 1) { + pr_err("i2c write error\n"); + return -EIO; + } + } + + return 0; +} + diff --git a/arch/arm/boards/karo-tx6x/pmic-rn5t567.c b/arch/arm/boards/karo-tx6x/pmic-rn5t567.c new file mode 100644 index 0000000..363ffbc --- /dev/null +++ b/arch/arm/boards/karo-tx6x/pmic-rn5t567.c @@ -0,0 +1,154 @@ +/* + * Copyright (C) 2014 Lothar Waßmann <LW@xxxxxxxxxxxxxxxxxxx> + * + * 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 RN5T567_NOETIMSET 0x11 +#define RN5T567_LDORTC1_SLOT 0x2a +#define RN5T567_DC1CTL 0x2c +#define RN5T567_DC1CTL2 0x2d +#define RN5T567_DC2CTL 0x2e +#define RN5T567_DC2CTL2 0x2f +#define RN5T567_DC3CTL 0x30 +#define RN5T567_DC3CTL2 0x31 +#define RN5T567_DC1DAC 0x36 /* CORE */ +#define RN5T567_DC2DAC 0x37 /* SOC */ +#define RN5T567_DC3DAC 0x38 /* DDR */ +#define RN5T567_DC1DAC_SLP 0x3b +#define RN5T567_DC2DAC_SLP 0x3c +#define RN5T567_DC3DAC_SLP 0x3d +#define RN5T567_LDOEN1 0x44 +#define RN5T567_LDODIS 0x46 +#define RN5T567_LDOEN2 0x48 +#define RN5T567_LDO3DAC 0x4e /* IO */ +#define RN5T567_LDORTC1DAC 0x56 /* VBACKUP */ + +#define NOETIMSET_DIS_OFF_NOE_TIM (1 << 3) + +#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(1350) /* DCDC1 */ +#define VDD_CORE_VAL_LP mV_to_regval(900) +#define VDD_SOC_VAL mV_to_regval(1350) /* DCDC2 */ +#define VDD_SOC_VAL_LP mV_to_regval(900) +#define VDD_DDR_VAL mV_to_regval(1350) /* DCDC3 */ +#define VDD_DDR_VAL_LP mV_to_regval(1350) + +/* 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 rn5t567_regs { + u8 addr; + u8 val; + u8 mask; +} rn5t567_regs[] = { + { RN5T567_NOETIMSET, NOETIMSET_DIS_OFF_NOE_TIM | 0x5, }, + { RN5T567_DC1DAC, VDD_CORE_VAL, }, + { RN5T567_DC2DAC, VDD_SOC_VAL, }, + { RN5T567_DC3DAC, VDD_DDR_VAL, }, + { RN5T567_DC1DAC_SLP, VDD_CORE_VAL_LP, }, + { RN5T567_DC2DAC_SLP, VDD_SOC_VAL_LP, }, + { RN5T567_DC3DAC_SLP, VDD_DDR_VAL_LP, }, + { RN5T567_LDOEN1, 0x01f, ~0x1f, }, + { RN5T567_LDOEN2, 0x10, ~0x30, }, + { RN5T567_LDODIS, 0x00, }, + { RN5T567_LDO3DAC, VDD_HIGH_VAL, }, + { RN5T567_LDORTC1DAC, VDD_RTC_VAL, }, + { RN5T567_LDORTC1_SLOT, 0x0f, ~0x3f, }, +}; + +static int rn5t567_setup_regs(struct i2c_client *client, struct rn5t567_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 rn5t567_pmic_setup(struct i2c_client *client) +{ + int ret; + unsigned char value; + + ret = i2c_read_reg(client, 0x11, &value, 1); + if (ret != 1) { + pr_err("i2c read error\n"); + return ret; + } + + ret = rn5t567_setup_regs(client, rn5t567_regs, + ARRAY_SIZE(rn5t567_regs)); + if (ret) + return ret; + + ret = i2c_read_reg(client, RN5T567_DC1DAC, &value, 1); + if (ret == 1) + pr_debug("VDDCORE set to %umV\n", regval_to_mV(value)); + else + pr_err("i2c read error\n"); + + ret = i2c_read_reg(client, RN5T567_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; +} 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 0000000..7c722c2 --- /dev/null +++ b/arch/arm/boards/karo-tx6x/pmic-rn5t618.c @@ -0,0 +1,152 @@ +/* + * Copyright (C) 2014 Lothar Waßmann <LW@xxxxxxxxxxxxxxxxxxx> + * + * 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"); + + 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; +} diff --git a/arch/arm/boards/karo-tx6x/pmic.h b/arch/arm/boards/karo-tx6x/pmic.h new file mode 100644 index 0000000..2427a52 --- /dev/null +++ b/arch/arm/boards/karo-tx6x/pmic.h @@ -0,0 +1,8 @@ + +#include <i2c/i2c.h> + +#define DIV_ROUND(n,d) (((n) + ((d)/2)) / (d)) + +int ltc3676_pmic_setup(struct i2c_client *client); +int rn5t567_pmic_setup(struct i2c_client *client); +int rn5t618_pmic_setup(struct i2c_client *client); -- 2.7.0 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox