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misc:pmic:core New generic PMIC driver

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I2C or SPI PMIC devices can be accessed.
Separate files: pmic_i2c.c and pmic_spi.c are responsible
for handling transmission over I2C or SPI bus.

New flags:
CONFIG_PMIC - enable PMIC general device.
CONFIG_PMIC_I2C/SPI - specify the interface to be used.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Łukasz Majewski
2011-10-06 02:37:34 +00:00
committed by Albert ARIBAUD
parent e56daf635b
commit e542b7f0a2
5 changed files with 422 additions and 0 deletions
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71
include/pmic.h Normal file
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/*
* Copyright (C) 2011 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __CORE_PMIC_H_
#define __CORE_PMIC_H_
enum { PMIC_I2C, PMIC_SPI, };
enum { I2C_PMIC, I2C_NUM, };
enum { PMIC_READ, PMIC_WRITE, };
struct p_i2c {
unsigned char addr;
unsigned char *buf;
unsigned char tx_num;
};
struct p_spi {
unsigned int cs;
unsigned int mode;
unsigned int bitlen;
unsigned int clk;
unsigned int flags;
u32 (*prepare_tx)(u32 reg, u32 *val, u32 write);
};
struct pmic {
const char *name;
unsigned char bus;
unsigned char interface;
unsigned char number_of_regs;
union hw {
struct p_i2c i2c;
struct p_spi spi;
} hw;
};
int pmic_init(void);
int check_reg(u32 reg);
struct pmic *get_pmic(void);
int pmic_probe(struct pmic *p);
int pmic_reg_read(struct pmic *p, u32 reg, u32 *val);
int pmic_reg_write(struct pmic *p, u32 reg, u32 val);
int pmic_set_output(struct pmic *p, u32 reg, int ldo, int on);
#define pmic_i2c_addr (p->hw.i2c.addr)
#define pmic_i2c_tx_num (p->hw.i2c.tx_num)
#define pmic_spi_bitlen (p->hw.spi.bitlen)
#define pmic_spi_flags (p->hw.spi.flags)
#endif /* __CORE_PMIC_H_ */