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author | Piotr Wilczek <p.wilczek@samsung.com> | 2013-09-24 16:31:22 +0200 |
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committer | Minkyu Kang <mk7.kang@samsung.com> | 2013-09-25 10:52:27 +0900 |
commit | 04750447124143dfc9444a0c3335ffc9636e1df8 (patch) | |
tree | b4533d68cf58eaeb698d3612a0e68d8d266cd47c /drivers/power/mfd/pmic_max77693.c | |
parent | 12eba1b49380988fd87cc0b3af44014cca8b71c4 (diff) | |
download | u-boot-imx-04750447124143dfc9444a0c3335ffc9636e1df8.zip u-boot-imx-04750447124143dfc9444a0c3335ffc9636e1df8.tar.gz u-boot-imx-04750447124143dfc9444a0c3335ffc9636e1df8.tar.bz2 |
drivers:power:max77693: add support for new multi function pmic max77693
This patch add support for new multi function pmic max77693.
The driver is split into three modules: pmic, muic and fuelgage.
Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'drivers/power/mfd/pmic_max77693.c')
-rw-r--r-- | drivers/power/mfd/pmic_max77693.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/power/mfd/pmic_max77693.c b/drivers/power/mfd/pmic_max77693.c new file mode 100644 index 0000000..1a4416b --- /dev/null +++ b/drivers/power/mfd/pmic_max77693.c @@ -0,0 +1,96 @@ +/* + * Copyright (C) 2013 Samsung Electronics + * Piotr Wilczek <p.wilczek@samsung.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <power/pmic.h> +#include <power/max77693_pmic.h> +#include <i2c.h> +#include <errno.h> + +static int max77693_charger_state(struct pmic *p, int state, int current) +{ + unsigned int val; + + if (pmic_probe(p)) + return -1; + + /* unlock write capability */ + val = MAX77693_CHG_UNLOCK; + pmic_reg_write(p, MAX77693_CHG_CNFG_06, val); + + if (state == CHARGER_DISABLE) { + puts("Disable the charger.\n"); + pmic_reg_read(p, MAX77693_CHG_CNFG_00, &val); + val &= ~0x01; + pmic_reg_write(p, MAX77693_CHG_CNFG_00, val); + return -1; + } + + if (current < CHARGER_MIN_CURRENT || current > CHARGER_MAX_CURRENT) { + printf("%s: Wrong charge current: %d [mA]\n", + __func__, current); + return -1; + } + + /* set charging current */ + pmic_reg_read(p, MAX77693_CHG_CNFG_02, &val); + val &= ~MAX77693_CHG_CC; + val |= current * 10 / 333; /* 0.1A/3 steps */ + pmic_reg_write(p, MAX77693_CHG_CNFG_02, val); + + /* enable charging */ + val = MAX77693_CHG_MODE_ON; + pmic_reg_write(p, MAX77693_CHG_CNFG_00, val); + + /* check charging current */ + pmic_reg_read(p, MAX77693_CHG_CNFG_02, &val); + val &= 0x3f; + printf("Enable the charger @ %d [mA]\n", val * 333 / 10); + + return 0; +} + +static int max77693_charger_bat_present(struct pmic *p) +{ + unsigned int val; + + if (pmic_probe(p)) + return -1; + + pmic_reg_read(p, MAX77693_CHG_INT_OK, &val); + + return !(val & MAX77693_CHG_DETBAT); +} + +static struct power_chrg power_chrg_pmic_ops = { + .chrg_bat_present = max77693_charger_bat_present, + .chrg_state = max77693_charger_state, +}; + +int pmic_init_max77693(unsigned char bus) +{ + static const char name[] = "MAX77693_PMIC"; + struct pmic *p = pmic_alloc(); + + if (!p) { + printf("%s: POWER allocation error!\n", __func__); + return -ENOMEM; + } + + debug("Board PMIC init\n"); + + p->name = name; + p->interface = PMIC_I2C; + p->number_of_regs = PMIC_NUM_OF_REGS; + p->hw.i2c.addr = MAX77693_PMIC_I2C_ADDR; + p->hw.i2c.tx_num = 1; + p->bus = bus; + + p->chrg = &power_chrg_pmic_ops; + + return 0; +} |