This patch add I2C interface for fsl_pmic driver support
Signed-off-by: Jason Liu <r64...@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)
{
--
1.7.0.4
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