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fsl_pmic: add I2C interface support

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This patch add I2C interface for fsl_pmic driver support

Signed-off-by: Jason Liu <r64343@freescale.com>
This commit is contained in:
Liu Hui-R64343 2011-01-03 22:27:40 +00:00 committed by Albert Aribaud
parent 127cec1889
commit 3382fd48f2
1 changed files with 40 additions and 5 deletions
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45
drivers/misc/fsl_pmic.c
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@ -22,11 +22,48 @@
#include <config.h> #include <config.h>
#include <common.h> #include <common.h>
#include <spi.h>
#include <asm/errno.h> #include <asm/errno.h>
#include <linux/types.h> #include <linux/types.h>
#include <fsl_pmic.h> #include <fsl_pmic.h>
static int check_param(u32 reg, u32 write)
{
if (reg > 63 || write > 1) {
printf("<reg num> = %d is invalid. Should be less then 63\n",
reg);
return -1;
}
return 0;
}
#ifdef CONFIG_FSL_PMIC_I2C
#include <i2c.h>
u32 pmic_reg(u32 reg, u32 val, u32 write)
{
unsigned char buf[4] = { 0 };
u32 ret_val = 0;
if (check_param(reg, write))
return -1;
if (write) {
buf[0] = (val >> 16) & 0xff;
buf[1] = (val >> 8) & 0xff;
buf[2] = (val) & 0xff;
if (i2c_write(CONFIG_SYS_FSL_PMIC_I2C_ADDR, reg, 1, buf, 3))
return -1;
} else {
if (i2c_read(CONFIG_SYS_FSL_PMIC_I2C_ADDR, reg, 1, buf, 3))
return -1;
ret_val = buf[0] << 16 | buf[1] << 8 | buf[2];
}
return ret_val;
}
#else /* SPI interface */
#include <spi.h>
static struct spi_slave *slave; static struct spi_slave *slave;
struct spi_slave *pmic_spi_probe(void) struct spi_slave *pmic_spi_probe(void)
@ -55,11 +92,8 @@ u32 pmic_reg(u32 reg, u32 val, u32 write)
return -1; return -1;
} }
if (reg > 63 || write > 1) { if (check_param(reg, write))
printf("<reg num> = %d is invalid. Should be less then 63\n",
reg);
return -1; return -1;
}
if (spi_claim_bus(slave)) if (spi_claim_bus(slave))
return -1; return -1;
@ -87,6 +121,7 @@ u32 pmic_reg(u32 reg, u32 val, u32 write)
spi_release_bus(slave); spi_release_bus(slave);
return cpu_to_be32(pmic_rx); return cpu_to_be32(pmic_rx);
} }
#endif
void pmic_reg_write(u32 reg, u32 value) void pmic_reg_write(u32 reg, u32 value)
{ {