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| author | Philip, Avinash <avinashphilip@ti.com> | 2013-08-30 16:28:43 -0400 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-09-20 11:01:26 -0400 |
| commit | b04601a7f0f29138bd4a14c383cdeefe83b5a7ee (patch) | |
| tree | 3fc13dc15a5028eabd9937398422c8c72d662ffe /drivers | |
| parent | 8b65b12a04e5665922697576538e75215d5b7a0f (diff) | |
| download | u-boot-imx-b04601a7f0f29138bd4a14c383cdeefe83b5a7ee.zip u-boot-imx-b04601a7f0f29138bd4a14c383cdeefe83b5a7ee.tar.gz u-boot-imx-b04601a7f0f29138bd4a14c383cdeefe83b5a7ee.tar.bz2 | |
drivers/power/pmic: Add tps65910 driver
Add a driver for the TPS65910 PMIC that is found in the AM335x GP EVM,
AM335x EVM SK and others.
Signed-off-by: Philip, Avinash <avinashphilip@ti.com>
[trini: Split and rework Avinash's changes into new drivers/power
framework]
Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/pmic/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/pmic/pmic_tps65910.c | 83 |
2 files changed, 84 insertions, 0 deletions
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index ac2b625..11b3d03 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -14,6 +14,7 @@ COBJS-$(CONFIG_POWER_MAX8997) += pmic_max8997.o COBJS-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o COBJS-$(CONFIG_POWER_MAX77686) += pmic_max77686.o COBJS-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o +COBJS-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o COBJS := $(COBJS-y) SRCS := $(COBJS:.o=.c) diff --git a/drivers/power/pmic/pmic_tps65910.c b/drivers/power/pmic/pmic_tps65910.c new file mode 100644 index 0000000..7ee1160 --- /dev/null +++ b/drivers/power/pmic/pmic_tps65910.c @@ -0,0 +1,83 @@ +/* + * (C) Copyright 2011-2013 + * Texas Instruments, <www.ti.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <i2c.h> +#include <power/tps65910.h> + +/* + * tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C + * interface. + * @return: 0 on success, not 0 on failure + */ +int tps65910_set_i2c_control(void) +{ + int ret; + uchar buf; + + /* VDD1/2 voltage selection register access by control i/f */ + ret = i2c_read(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1, + &buf, 1); + + if (ret) + return ret; + + buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C; + + return i2c_write(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1, + &buf, 1); +} + +/* + * tps65910_voltage_update() - Voltage switching for MPU frequency switching. + * @module: mpu - 0, core - 1 + * @vddx_op_vol_sel: vdd voltage to set + * @return: 0 on success, not 0 on failure + */ +int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel) +{ + uchar buf; + unsigned int reg_offset; + int ret; + + if (module == MPU) + reg_offset = TPS65910_VDD1_OP_REG; + else + reg_offset = TPS65910_VDD2_OP_REG; + + /* Select VDDx OP */ + ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); + if (ret) + return ret; + + buf &= ~TPS65910_OP_REG_CMD_MASK; + + ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); + if (ret) + return ret; + + /* Configure VDDx OP Voltage */ + ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); + if (ret) + return ret; + + buf &= ~TPS65910_OP_REG_SEL_MASK; + buf |= vddx_op_vol_sel; + + ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); + if (ret) + return ret; + + ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); + if (ret) + return ret; + + if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel) + return 1; + + return 0; +} |