diff options
Diffstat (limited to 'chip/lm4/i2c.c')
| -rwxr-xr-x[-rw-r--r--] | chip/lm4/i2c.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/chip/lm4/i2c.c b/chip/lm4/i2c.c index 2c6bbab8c4..a1a152030d 100644..100755 --- a/chip/lm4/i2c.c +++ b/chip/lm4/i2c.c @@ -161,8 +161,8 @@ int i2c_do_work(int port) return 0; } -int i2c_xfer(int port, int slave_addr, const uint8_t *out, int out_size, - uint8_t *in, int in_size, int flags) +static int i2c_xfer_unit(int port, int slave_addr, const uint8_t *out, + int out_size, uint8_t *in, int in_size, int flags) { struct i2c_port_data *pd = pdata + port; uint32_t reg_mcs = LM4_I2C_MCS(port); @@ -242,6 +242,26 @@ int i2c_xfer(int port, int slave_addr, const uint8_t *out, int out_size, return pd->err; } +#ifndef CONFIG_I2C_RETRY_CNT +#define CONFIG_I2C_RETRY_CNT 1 +#endif + +int i2c_xfer(int port, int slave_addr, const uint8_t *out, int out_size, + uint8_t *in, int in_size, int flags) +{ + int cnt = CONFIG_I2C_RETRY_CNT; + int rv; + + for(;cnt > 0; cnt --){ + rv = i2c_xfer_unit(port, slave_addr, out, out_size, in, in_size, flags); + if(rv == 0) + break; + usleep(100); + } + + return rv; +} + int i2c_raw_get_scl(int port) { enum gpio_signal g; |