michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: i2c_cc32xx: Get clock frequency from DTS

Browse source 
The i2c_cc32xx driver used system clock frequency
as a base for I2C clock frequency calculation.
This commit corrects that by obtaining the needed value from DTS.

Please note, that for I2C devices the clock-frequency property
specifies SCK frequency, instead of frequency of the clock driving
peripheral. To solve that problem, a new property was added.

Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
This commit is contained in:
Piotr Zięcik 2019-04-11 14:28:52 +02:00 • committed by Carles Cufí
commit 8f22b16b6c
2 changed files with 2 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/i2c/i2c_cc32xx.c
View file

@ -103,7 +103,7 @@ static int i2c_cc32xx_configure(struct device *dev, u32_t dev_config_raw)
return -EINVAL;
}
MAP_I2CMasterInitExpClk(base, CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC,
MAP_I2CMasterInitExpClk(base, DT_I2C_0_CLOCK_FREQUENCY,
bitrate_id);
return 0;

1
soc/arm/ti_simplelink/cc32xx/dts_fixup.h
View file

@ -8,6 +8,7 @@
#define DT_I2C_0_LABEL DT_TI_CC32XX_I2C_40020000_LABEL
#define DT_I2C_0_BASE_ADDRESS DT_TI_CC32XX_I2C_40020000_BASE_ADDRESS
#define DT_I2C_0_BITRATE DT_TI_CC32XX_I2C_40020000_CLOCK_FREQUENCY
#define DT_I2C_0_CLOCK_FREQUENCY DT_TI_CC32XX_I2C_40020000_CLOCKS_CLOCK_FREQUENCY
#define DT_I2C_0_IRQ DT_TI_CC32XX_I2C_40020000_IRQ_0
#define DT_I2C_0_IRQ_PRIORITY DT_TI_CC32XX_I2C_40020000_IRQ_0_PRIORITY