misc:pmic:core New generic PMIC driver
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
Albert ARIBAUD
parent
e56daf635b
commit
e542b7f0a2
|
|
@ -35,6 +35,9 @@ COBJS-$(CONFIG_NS87308) += ns87308.o
|
|||
COBJS-$(CONFIG_PDSP188x) += pdsp188x.o
|
||||
COBJS-$(CONFIG_STATUS_LED) += status_led.o
|
||||
COBJS-$(CONFIG_TWL4030_LED) += twl4030_led.o
|
||||
COBJS-$(CONFIG_PMIC) += pmic_core.o
|
||||
COBJS-$(CONFIG_PMIC_I2C) += pmic_i2c.o
|
||||
COBJS-$(CONFIG_PMIC_SPI) += pmic_spi.o
|
||||
|
||||
COBJS := $(COBJS-y)
|
||||
SRCS := $(COBJS:.o=.c)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,147 @@
|
|||
/*
|
||||
* Copyright (C) 2011 Samsung Electronics
|
||||
* Lukasz Majewski <l.majewski@samsung.com>
|
||||
*
|
||||
* (C) Copyright 2010
|
||||
* Stefano Babic, DENX Software Engineering, sbabic@denx.de
|
||||
*
|
||||
* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#include <common.h>
|
||||
#include <linux/types.h>
|
||||
#include <pmic.h>
|
||||
|
||||
static struct pmic pmic;
|
||||
|
||||
int check_reg(u32 reg)
|
||||
{
|
||||
if (reg >= pmic.number_of_regs) {
|
||||
printf("<reg num> = %d is invalid. Should be less than %d\n",
|
||||
reg, pmic.number_of_regs);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int pmic_set_output(struct pmic *p, u32 reg, int out, int on)
|
||||
{
|
||||
u32 val;
|
||||
|
||||
if (pmic_reg_read(p, reg, &val))
|
||||
return -1;
|
||||
|
||||
if (on)
|
||||
val |= out;
|
||||
else
|
||||
val &= ~out;
|
||||
|
||||
if (pmic_reg_write(p, reg, val))
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void pmic_show_info(struct pmic *p)
|
||||
{
|
||||
printf("PMIC: %s\n", p->name);
|
||||
}
|
||||
|
||||
static void pmic_dump(struct pmic *p)
|
||||
{
|
||||
int i, ret;
|
||||
u32 val;
|
||||
|
||||
pmic_show_info(p);
|
||||
for (i = 0; i < p->number_of_regs; i++) {
|
||||
ret = pmic_reg_read(p, i, &val);
|
||||
if (ret)
|
||||
puts("PMIC: Registers dump failed\n");
|
||||
|
||||
if (!(i % 8))
|
||||
printf("\n0x%02x: ", i);
|
||||
|
||||
printf("%08x ", val);
|
||||
}
|
||||
puts("\n");
|
||||
}
|
||||
|
||||
struct pmic *get_pmic(void)
|
||||
{
|
||||
return &pmic;
|
||||
}
|
||||
|
||||
int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
|
||||
{
|
||||
u32 ret, reg, val;
|
||||
char *cmd;
|
||||
|
||||
struct pmic *p = &pmic;
|
||||
|
||||
/* at least two arguments please */
|
||||
if (argc < 2)
|
||||
return cmd_usage(cmdtp);
|
||||
|
||||
cmd = argv[1];
|
||||
if (strcmp(cmd, "dump") == 0) {
|
||||
pmic_dump(p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (strcmp(cmd, "read") == 0) {
|
||||
if (argc < 3)
|
||||
return cmd_usage(cmdtp);
|
||||
|
||||
reg = simple_strtoul(argv[2], NULL, 16);
|
||||
|
||||
ret = pmic_reg_read(p, reg, &val);
|
||||
|
||||
if (ret)
|
||||
puts("PMIC: Register read failed\n");
|
||||
|
||||
printf("\n0x%02x: 0x%08x\n", reg, val);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (strcmp(cmd, "write") == 0) {
|
||||
if (argc < 4)
|
||||
return cmd_usage(cmdtp);
|
||||
|
||||
reg = simple_strtoul(argv[2], NULL, 16);
|
||||
val = simple_strtoul(argv[3], NULL, 16);
|
||||
|
||||
pmic_reg_write(p, reg, val);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* No subcommand found */
|
||||
return 1;
|
||||
}
|
||||
|
||||
U_BOOT_CMD(
|
||||
pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
|
||||
"PMIC",
|
||||
"dump - dump PMIC registers\n"
|
||||
"pmic read <reg> - read register\n"
|
||||
"pmic write <reg> <value> - write register"
|
||||
);
|
||||
|
|
@ -0,0 +1,92 @@
|
|||
/*
|
||||
* Copyright (C) 2011 Samsung Electronics
|
||||
* Lukasz Majewski <l.majewski@samsung.com>
|
||||
*
|
||||
* (C) Copyright 2010
|
||||
* Stefano Babic, DENX Software Engineering, sbabic@denx.de
|
||||
*
|
||||
* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#include <common.h>
|
||||
#include <linux/types.h>
|
||||
#include <pmic.h>
|
||||
#include <i2c.h>
|
||||
|
||||
int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
|
||||
{
|
||||
unsigned char buf[4] = { 0 };
|
||||
|
||||
if (check_reg(reg))
|
||||
return -1;
|
||||
|
||||
switch (pmic_i2c_tx_num) {
|
||||
case 3:
|
||||
buf[0] = (val >> 16) & 0xff;
|
||||
buf[1] = (val >> 8) & 0xff;
|
||||
buf[2] = val & 0xff;
|
||||
break;
|
||||
case 1:
|
||||
buf[0] = val & 0xff;
|
||||
break;
|
||||
}
|
||||
|
||||
if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
|
||||
{
|
||||
unsigned char buf[4] = { 0 };
|
||||
u32 ret_val = 0;
|
||||
|
||||
if (check_reg(reg))
|
||||
return -1;
|
||||
|
||||
if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
|
||||
return -1;
|
||||
|
||||
switch (pmic_i2c_tx_num) {
|
||||
case 3:
|
||||
ret_val = buf[0] << 16 | buf[1] << 8 | buf[2];
|
||||
break;
|
||||
case 1:
|
||||
ret_val = buf[0];
|
||||
break;
|
||||
}
|
||||
memcpy(val, &ret_val, sizeof(ret_val));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int pmic_probe(struct pmic *p)
|
||||
{
|
||||
i2c_set_bus_num(p->bus);
|
||||
debug("PMIC:%s probed!\n", p->name);
|
||||
if (i2c_probe(pmic_i2c_addr)) {
|
||||
printf("Can't find PMIC:%s\n", p->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,109 @@
|
|||
/*
|
||||
* Copyright (C) 2011 Samsung Electronics
|
||||
* Lukasz Majewski <l.majewski@samsung.com>
|
||||
*
|
||||
* (C) Copyright 2010
|
||||
* Stefano Babic, DENX Software Engineering, sbabic@denx.de
|
||||
*
|
||||
* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#include <common.h>
|
||||
#include <linux/types.h>
|
||||
#include <pmic.h>
|
||||
#include <spi.h>
|
||||
|
||||
static struct spi_slave *slave;
|
||||
|
||||
void pmic_spi_free(struct spi_slave *slave)
|
||||
{
|
||||
if (slave)
|
||||
spi_free_slave(slave);
|
||||
}
|
||||
|
||||
struct spi_slave *pmic_spi_probe(struct pmic *p)
|
||||
{
|
||||
return spi_setup_slave(p->bus,
|
||||
p->hw.spi.cs,
|
||||
p->hw.spi.clk,
|
||||
p->hw.spi.mode);
|
||||
}
|
||||
|
||||
static u32 pmic_reg(struct pmic *p, u32 reg, u32 *val, u32 write)
|
||||
{
|
||||
u32 pmic_tx, pmic_rx;
|
||||
u32 tmp;
|
||||
|
||||
if (!slave) {
|
||||
slave = pmic_spi_probe(p);
|
||||
|
||||
if (!slave)
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (check_reg(reg))
|
||||
return -1;
|
||||
|
||||
if (spi_claim_bus(slave))
|
||||
return -1;
|
||||
|
||||
pmic_tx = p->hw.spi.prepare_tx(reg, val, write);
|
||||
|
||||
tmp = cpu_to_be32(pmic_tx);
|
||||
|
||||
if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
|
||||
pmic_spi_flags)) {
|
||||
spi_release_bus(slave);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (write) {
|
||||
pmic_tx = p->hw.spi.prepare_tx(0, NULL, write);
|
||||
pmic_tx &= ~(1 << 31);
|
||||
tmp = cpu_to_be32(pmic_tx);
|
||||
if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
|
||||
pmic_spi_flags)) {
|
||||
spi_release_bus(slave);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
spi_release_bus(slave);
|
||||
*val = cpu_to_be32(pmic_rx);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
|
||||
{
|
||||
if (pmic_reg(p, reg, &val, 1))
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
|
||||
{
|
||||
if (pmic_reg(p, reg, val, 0))
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,71 @@
|
|||
/*
|
||||
* 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_ */
|
||||
Loading…
Reference in New Issue