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The 'u-boot,i2c-transaction-bytes' device tree property provides information regarding number of bytes transferred by a device in a single transaction. This change is necessary to avoid hanging devices after soft reset. One notable example is communication with MC34708 device: 1. Reset when communicating with MC34708 via I2C. 2. The u-boot (after reboot -f) tries to setup the I2C and then calls force_idle_bus. In the same time MC34708 still has some data to be sent (as it transfers data in 24 bits chunks). 3. The force_idle_bus() is not able to make the bus idle as 8 SCL clocks may be not enough to have the full transmission. 4. We end up with I2C inconsistency with MC34708. This PMIC device requires 24+ SCL cycles to make finish any pending I2C transmission. Signed-off-by: Lukasz Majewski <lukma@denx.de> |
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| .. | ||
| i2c-at91.txt | ||
| i2c-cdns.txt | ||
| i2c-gpio.txt | ||
| i2c-mux.txt | ||
| i2c-stm32.txt | ||
| i2c.txt | ||
| nvidia,tegra186-bpmp-i2c.txt | ||
| tegra20-i2c.txt | ||