On 03/16/2016 02:10 PM, Ben Hutchings wrote: > The binding definition for the PCF857x GPIO expanders doesn't mention > a "ti,pcf8575" compatible string. This is apparently because TI is > only a second source - there is no functional difference between > PCF8575 chips manufactured by TI and NXP, and the same board might be > populated with either depending on availability. > > As a practical matter, the gpio-pcf857x driver doesn't match this > string, so these device trees currently don't work. Sry, but could you explain more about "these device trees currently don't work"? On my boards pcf_gpio_21: gpio@21 is enumerated, because the i2c core uses modalias (of_modalias_node()). root@dra7xx-evm:/# cat /proc/device-tree/ocp/i2c\@48070000/gpio\@21/compatible ti,pcf8575 root@dra7xx-evm:/# cat /sys/kernel/debug/gpio GPIOs 480-495, i2c/0-0021, pcf8575, can sleep: gpio-481 (id ) in hi IRQ gpio-482 (id ) in hi IRQ gpio-485 (evm_3v3_sd ) out hi gpio-494 (enable ) out lo just worry if I missed smth. -- regards, -grygorii -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
