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

[Stefano Babic <sbabic@denx.de>]

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

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