Re: [PATCH 21/21] imx93_evk: Enable M.2 VPCIe_3V3 and deassert SD3_nRST

Hi Peng,

On Mon, Sep 16, 2024 at 11:31 PM Peng Fan (OSS) peng.fan@oss.nxp.com wrote:

•   /* Enable EXT1_PWREN for PCIE_3.3V */
  

•   ret = dm_gpio_lookup_name("gpio@22_13", &desc);
  

•   if (ret)
  

•           return;
  

•   ret = dm_gpio_request(&desc, "EXT1_PWREN");
  

•   if (ret)
  

•           return;
  

•   dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
  

•   dm_gpio_set_value(&desc, 1);
  

•   /* Deassert SD3_nRST */
  

•   ret = dm_gpio_lookup_name("gpio@22_12", &desc);
  

•   if (ret)
  

•           return;
  

•   ret = dm_gpio_request(&desc, "SD3_nRST");
  

•   if (ret)
  

•           return;
  

•   dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
  

•   dm_gpio_set_value(&desc, 1);
  

Why do we need all this board code? This should be properly described in the devicetree.

How does Linux deal with it?