diff options
Diffstat (limited to 'common/i2c_controller.c')
| -rw-r--r-- | common/i2c_controller.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/common/i2c_controller.c b/common/i2c_controller.c index 9fd68aaa2d..59aff3d69e 100644 --- a/common/i2c_controller.c +++ b/common/i2c_controller.c @@ -1724,6 +1724,80 @@ DECLARE_CONSOLE_COMMAND(i2cxfer, command_i2cxfer, "Read write I2C"); #endif +#ifdef CONFIG_CMD_I2C_SPEED + +static const char * const i2c_freq_str[] = { + [I2C_FREQ_1000KHZ] = "1000 kHz", + [I2C_FREQ_400KHZ] = "400 kHz", + [I2C_FREQ_100KHZ] = "100 kHz", + [I2C_FREQ_COUNT] = "unknown", +}; + +BUILD_ASSERT(ARRAY_SIZE(i2c_freq_str) == I2C_FREQ_COUNT + 1); + +static int command_i2c_speed(int argc, char **argv) +{ + int port; + char *e; + enum i2c_freq freq; + enum i2c_freq new_freq = I2C_FREQ_COUNT; + + if (argc < 2 || argc > 3) + return EC_ERROR_PARAM_COUNT; + + port = strtoi(argv[1], &e, 0); + if (*e) + return EC_ERROR_PARAM1; + + if (port < 0 || port >= I2C_PORT_COUNT) + return EC_ERROR_INVAL; + + freq = i2c_get_freq(port); + if (freq < 0 || freq > I2C_FREQ_COUNT) + return EC_ERROR_UNKNOWN; + + if (argc == 3) { + int khz; + int rv; + + khz = strtoi(argv[2], &e, 0); + if (*e) + return EC_ERROR_PARAM2; + + switch (khz) { + case 100: + new_freq = I2C_FREQ_100KHZ; + break; + case 400: + new_freq = I2C_FREQ_400KHZ; + break; + case 1000: + new_freq = I2C_FREQ_1000KHZ; + break; + default: + return EC_ERROR_PARAM2; + } + rv = i2c_set_freq(port, new_freq); + if (rv != EC_SUCCESS) + return rv; + } + + if (new_freq != I2C_FREQ_COUNT) + ccprintf("Port %d speed changed from %s to %s\n", port, + i2c_freq_str[freq], + i2c_freq_str[new_freq]); + else + ccprintf("Port %d speed is %s\n", port, i2c_freq_str[freq]); + + return EC_SUCCESS; +} + +DECLARE_CONSOLE_COMMAND(i2cspeed, command_i2c_speed, + "port [speed in kHz]", + "Get or set I2C port speed"); + +#endif /* CONFIG_CMD_I2C_SPEED */ + #ifdef CONFIG_CMD_I2C_STRESS_TEST static void i2c_test_status(struct i2c_test_results *i2c_test, int test_dev) { |