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imx7d MX7D_PAD_LCD_DATA04 cannot be used

Question asked by 其东 刘 on Jun 4, 2020
Latest reply on Jun 9, 2020 by Wigros Sun

Hello everyone
my development board is IMX7DSABRE. Linux kernel version is 4.9.88

After MX7D_PAD_LCD_DATA04 and MX7D_PAD_LCD_DATA08 are multiplexed as GPIO functions, the state of the gpio pin cannot be changed through the gpio_set_value function. After the other MX7D_PAD_LCD_DATAn is multiplexed as the gpio function, the state of the gpio pin can be normally controlled. My driver has successfully applied for two IO resources, MX7D_PAD_LCD_DATA04__GPIO3_IO9 and MX7D_PAD_LCD_DATA08__GPIO3_IO13. But they can't control their pin status. Can you verify this problem?

I have confirmed here that MX7D_PAD_LCD_DATA04__GPIO3_IO9 and MX7D_PAD_LCD_DATA08__GPIO3_IO13 are not used elsewhere. Please send me a reply after verification.