This patch add I2C interface for fsl_pmic driver support
Signed-off-by: Jason Liu r64343@freescale.com
--- Changes for v2: - Address the comments from Stefano, - factor out the param_check in pmic_reg for both spi/i2c --- drivers/misc/fsl_pmic.c | 52 ++++++++++++++++++++++++++++++++++++++++++---- 1 files changed, 47 insertions(+), 5 deletions(-)
diff --git a/drivers/misc/fsl_pmic.c b/drivers/misc/fsl_pmic.c index 5ee1de1..b58854d 100644 --- a/drivers/misc/fsl_pmic.c +++ b/drivers/misc/fsl_pmic.c @@ -22,11 +22,55 @@
#include <config.h> #include <common.h> -#include <spi.h> #include <asm/errno.h> #include <linux/types.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> +static int init_done; + +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 (init_done == 0) { + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + init_done = 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;
struct spi_slave *pmic_spi_probe(void) @@ -55,11 +99,8 @@ u32 pmic_reg(u32 reg, u32 val, u32 write) return -1; }
- if (reg > 63 || write > 1) { - printf("<reg num> = %d is invalid. Should be less then 63\n", - reg); + if (check_param(reg, write)) return -1; - }
if (spi_claim_bus(slave)) return -1; @@ -87,6 +128,7 @@ u32 pmic_reg(u32 reg, u32 val, u32 write) spi_release_bus(slave); return cpu_to_be32(pmic_rx); } +#endif
void pmic_reg_write(u32 reg, u32 value) {