[U-Boot] [PATCH 3/4] power: Add support for LTC3676 PMIC

Stefano Babic
2014-04-24T08:05:38Z

Hi Tim,

On 23/04/2014 06:53, Tim Harvey wrote:
> The LTC3676 PMIC includes four DC/DC converters, and three 300mA
> LDO Regulators (two Adjustable). The DC/DC converters are adjustable based
> on a resistor devider (board-specific).
>
> This adds support for the LTC3676 by creating a namespace unique init function
> that uses the PMIC API to allocate a pmic and defines the registers.
>
> Signed-off-by: Tim Harvey <tharvey@gateworks.com>
> ---
> drivers/power/pmic/Makefile | 1 +
> drivers/power/pmic/pmic_ltc3676.c | 32 ++++++++++++++++++++++++
> include/power/ltc3676_pmic.h | 51 +++++++++++++++++++++++++++++++++++++++
> 3 files changed, 84 insertions(+)
> create mode 100644 drivers/power/pmic/pmic_ltc3676.c
> create mode 100644 include/power/ltc3676_pmic.h
>
> diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
> index 4129bda..920bbdc 100644
> --- a/drivers/power/pmic/Makefile
> +++ b/drivers/power/pmic/Makefile
> @@ -5,6 +5,7 @@
> # SPDX-License-Identifier: GPL-2.0+
> #
>
> +obj-$(CONFIG_POWER_LTC3676) += pmic_ltc3676.o
> obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o
> obj-$(CONFIG_POWER_MAX8997) += pmic_max8997.o
> obj-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o
> diff --git a/drivers/power/pmic/pmic_ltc3676.c b/drivers/power/pmic/pmic_ltc3676.c
> new file mode 100644
> index 0000000..9b874cb
> --- /dev/null
> +++ b/drivers/power/pmic/pmic_ltc3676.c
> @@ -0,0 +1,32 @@
> +/*
> + * Copyright (C) 2014 Gateworks Corporation
> + * Tim Harvey <tharvey@gateworks.com>
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <errno.h>
> +#include <i2c.h>
> +#include <power/pmic.h>
> +#include <power/ltc3676_pmic.h>
> +
> +int power_ltc3676_init(unsigned char bus)
> +{
> + static const char name[] = "LTC3676_PMIC";
> + 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 = LTC3676_NUM_OF_REGS;
> + p->hw.i2c.addr = CONFIG_POWER_LTC3676_I2C_ADDR;
> + p->hw.i2c.tx_num = 1;
> + p->bus = bus;
> +
> + return 0;
> +}
> diff --git a/include/power/ltc3676_pmic.h b/include/power/ltc3676_pmic.h
> new file mode 100644
> index 0000000..dcaa985
> --- /dev/null
> +++ b/include/power/ltc3676_pmic.h
> @@ -0,0 +1,51 @@
> +/*
> + * Copyright (C) 2014 Gateworks Corporation
> + * Tim Harvey <tharvey@gateworks.com>
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#ifndef __LTC3676_PMIC_H_
> +#define __LTC3676_PMIC_H_
> +
> +/* LTC3676 registers */
> +enum {
> + LTC3676_BUCK1 = 0x01,
> + LTC3676_BUCK2 = 0x02,
> + LTC3676_BUCK3 = 0x03,
> + LTC3676_BUCK4 = 0x04,
> + LTC3676_LDOA = 0x05,
> + LTC3676_LDOB = 0x06,
> + LTC3676_SQD1 = 0x07,
> + LTC3676_SQD2 = 0x08,
> + LTC3676_CNTRL = 0x09,
> + LTC3676_DVB1A = 0x0A,
> + LTC3676_DVB1B = 0x0B,
> + LTC3676_DVB2A = 0x0C,
> + LTC3676_DVB2B = 0x0D,
> + LTC3676_DVB3A = 0x0E,
> + LTC3676_DVB3B = 0x0F,
> + LTC3676_DVB4A = 0x10,
> + LTC3676_DVB4B = 0x11,
> + LTC3676_MSKIRQ = 0x12,
> + LTC3676_MSKPG = 0x13,
> + LTC3676_USER = 0x14,
> + LTC3676_HRST = 0x1E,
> + LTC3676_CLIRQ = 0x1F,
> + LTC3676_IRQSTAT = 0x15,
> + LTC3676_PGSTATL = 0x16,
> + LTC3676_PGSTATR = 0x17,
> + LTC3676_NUM_OF_REGS = 0x20,
> +};
> +
> +/*
> + * SW Configuration
> + */
> +
> +#define LTC3676_DVB_MASK 0x1f
> +#define LTC3676_PGOOD_MASK (1<<5)
> +#define LTC3676_REF_SELA (0<<5)
> +#define LTC3676_REF_SELB (1<<5)
> +
> +int power_ltc3676_init(unsigned char bus);
> +#endif
>

Acked-by: Stefano Babic <sbabic@denx.de>

Best regards,
Stefano Babic