This regulator is used with AM437x IDK to feed VDD_MPU, without means to scale VDD_MPU we can't support higher frequencies.
Signed-off-by: Felipe Balbi balbi@ti.com ---
Changes since v1: - git add the header which I had missed originally
drivers/power/pmic/Makefile | 1 + drivers/power/pmic/pmic_tps62362.c | 47 ++++++++++++++++++++++++++++++++++++++ include/power/tps62362.h | 29 +++++++++++++++++++++++ 3 files changed, 77 insertions(+) create mode 100644 drivers/power/pmic/pmic_tps62362.c create mode 100644 include/power/tps62362.h
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile index e7b07eb..985cfdb 100644 --- a/drivers/power/pmic/Makefile +++ b/drivers/power/pmic/Makefile @@ -14,5 +14,6 @@ obj-$(CONFIG_POWER_PFUZE100) += pmic_pfuze100.o obj-$(CONFIG_POWER_TPS65090_I2C) += pmic_tps65090.o obj-$(CONFIG_POWER_TPS65090_EC) += pmic_tps65090_ec.o obj-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o +obj-$(CONFIG_POWER_TPS65218) += pmic_tps62362.o obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o obj-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o diff --git a/drivers/power/pmic/pmic_tps62362.c b/drivers/power/pmic/pmic_tps62362.c new file mode 100644 index 0000000..2123685 --- /dev/null +++ b/drivers/power/pmic/pmic_tps62362.c @@ -0,0 +1,47 @@ +/* + * (C) Copyright 2014 Texas Instruments Incorporated - http://www.ti.com + * Author: Felipe Balbi balbi@ti.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <i2c.h> +#include <asm/errno.h> +#include <power/pmic.h> +#include <power/tps62362.h> + +/** + * tps62362_voltage_update() - Function to change a voltage level, as this + * is a multi-step process. + * @reg: Register address to write to + * @volt_sel: Voltage register value to write + * @return: 0 on success, 1 on failure + */ +int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel) +{ + if (reg > TPS62362_NUM_REGS) + return 1; + + return i2c_write(TPS62362_I2C_ADDR, reg, 1, &volt_sel, 1); +} + +int power_tps62362_init(unsigned char bus) +{ + static const char name[] = "TPS62362"; + struct pmic *p = pmic_alloc(); + + if (!p) { + printf("%s: POWER allocation error!\n", __func__); + return -ENOMEM; + } + + p->name = name; + p->interface = PMIC_I2C; + p->number_of_regs = TPS62362_NUM_REGS; + p->hw.i2c.addr = TPS62362_I2C_ADDR; + p->hw.i2c.tx_num = 1; + p->bus = bus; + + return 0; +} diff --git a/include/power/tps62362.h b/include/power/tps62362.h new file mode 100644 index 0000000..720c338 --- /dev/null +++ b/include/power/tps62362.h @@ -0,0 +1,29 @@ +/* + * (C) Copyright 2014 Texas Instruments Incorporated - http://www.ti.com + * Author: Felipe Balbi balbi@ti.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __POWER_TPS62362_H__ +#define __POWER_TPS62362_H__ + +/* I2C chip address */ +#define TPS62362_I2C_ADDR 0x60 + +/* Registers */ +#define TPS62362_SET0 0x00 +#define TPS62362_SET1 0x01 +#define TPS62362_SET2 0x02 +#define TPS62362_SET3 0x03 +#define TPS62362_NUM_REGS 4 + +#define TPS62362_DCDC_VOLT_SEL_0950MV 0x12 +#define TPS62362_DCDC_VOLT_SEL_1100MV 0x21 +#define TPS62362_DCDC_VOLT_SEL_1200MV 0x2b +#define TPS62362_DCDC_VOLT_SEL_1260MV 0x31 +#define TPS62362_DCDC_VOLT_SEL_1330MV 0x38 + +int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel); +int power_tps62362_init(unsigned char bus); +#endif /* __POWER_TPS62362_H__ */