Messages in this thread Patch in this message | | | From | Yicong Yang <> | Subject | [PATCH v6 2/5] i2c: core: add api to provide frequency mode strings | Date | Wed, 31 Mar 2021 21:36:27 +0800 |
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Some I2C drivers like Designware and HiSilicon will print the bus frequency mode information, so add a public one that everyone can make use of.
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> --- include/linux/i2c.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 10bd0b0..7268180 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -47,6 +47,26 @@ typedef int (*i2c_slave_cb_t)(struct i2c_client *client, #define I2C_MAX_HIGH_SPEED_MODE_FREQ 3400000 #define I2C_MAX_ULTRA_FAST_MODE_FREQ 5000000 +static inline const char *i2c_freq_mode_string(u32 bus_freq_hz) +{ + switch (bus_freq_hz) { + case I2C_MAX_STANDARD_MODE_FREQ: + return "Standard Mode (100 kHz)"; + case I2C_MAX_FAST_MODE_FREQ: + return "Fast Mode (400 kHz)"; + case I2C_MAX_FAST_MODE_PLUS_FREQ: + return "Fast Mode Plus (1.0 MHz)"; + case I2C_MAX_TURBO_MODE_FREQ: + return "Turbo Mode (1.4 MHz)"; + case I2C_MAX_HIGH_SPEED_MODE_FREQ: + return "High Speed Mode (3.4 MHz)"; + case I2C_MAX_ULTRA_FAST_MODE_FREQ: + return "Ultra Fast Mode (5.0 MHz)"; + default: + return "Unknown Mode"; + } +} + struct module; struct property_entry; -- 2.8.1
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