Hi, On 5/3/21 3:16 PM, yuechao.zhao(赵越超) wrote: > Hi Andy > Sorry for the late reply > > The reason for writing this driver is that our customers hope that the LED and GPIO can be used out of the box > When they using our X86-Platform > > About the document and ACPI expert, I will provide them after I improve them. Please wait for a few days. So my initial assessment of this code matches Andy's I don't like the idea of duplicating the GPIO chip functionality from drivers/gpio/gpio-pca953x.c here. I understand that you want to have things working out of the box and I believe that we all agree that that is what we want. But you can get there without duplicating the code. We already have cases where there is an I2C device with an existing driver where we need some "glue" code to translate the ACPI provided info to what the i2c drivers expect, some examples of these are: drivers/platform/x86/i2c-multi-instantiate.c drivers/platform/x86/intel_cht_int33fe_typec.c So what you need to do is basically start writing a completely new driver which: 1. Instantiates an i2c-client for the drivers/gpio/gpio-pca953x.c driver to bind to. 2. Creates and attaches software-fwnodes which provide info for the drivers/leds/leds-gpio.c code to parse and have that code instantiate LED class devices which drive the leds through the GPIO interface offered by the drivers/gpio/gpio-pca953x.c driver. Regards, Hans > 在 2021/5/2 下午6:50，“Andy Shevchenko”<andy.shevchenko@xxxxxxxxx> 写入: > > On Fri, Apr 30, 2021 at 8:27 AM yuechao.zhao(赵越超) > <yuechao.zhao@xxxxxxxxxxxxxxxx> wrote: > > > > From: Yuechao Zhao <yuechao.zhao@xxxxxxxxxxxxxxxx> > > > > With this driver, we can multiplex PCA9554/PCA9555 into LED and GPIO > > based on the ACPI data of BIOS. > > NAK as per v2. > > Please, add a proper documentation and show ACPI excerpt, and last but > not least is missing justification. > > > -- > With Best Regards, > Andy Shevchenko >
