src/mainboard/google/brya/variants/uldrenite/variant.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <baseboard/gpio.h>
   4 #include <baseboard/variants.h>
   5 #include <console/console.h>
   6 #include <delay.h>
   7
   8 #define RW350R_RST_DELAY_MS 20
   9 #define RW350R_PERST_DELAY_MS 30
  10
  11 static const struct pad_config rw350r_en_pad[] = {
  12         /* H23 : LTE_PWR_OFF_EN */
  13         PAD_CFG_GPO(GPP_H23, 1, DEEP),
  14 };
  15 static const struct pad_config rw350r_rst_pad[] = {
  16         /* F12 : WWAN_RST_L */
  17         PAD_CFG_GPO_LOCK(GPP_F12, 1, LOCK_CONFIG),
  18 };
  19 static const struct pad_config rw350r_perst_pad[] = {
  20         /* F13 : PLTRST_WWAN# */
  21         PAD_CFG_GPO(GPP_F13, 1, DEEP),
  22 };
  23
  24 void variant_init(void)
  25 {
  26         /*
  27          * RW350R power on seuqence:
  28          * De-assert WWAN_EN -> 20ms -> de-assert WWAN_RST -> 30ms ->
  29          * de-assert WWAN_PERST
  30          */
  31         gpio_configure_pads(rw350r_en_pad, ARRAY_SIZE(rw350r_en_pad));
  32         mdelay(RW350R_RST_DELAY_MS);
  33         gpio_configure_pads(rw350r_rst_pad, ARRAY_SIZE(rw350r_rst_pad));
  34         mdelay(RW350R_PERST_DELAY_MS);
  35         gpio_configure_pads(rw350r_perst_pad, ARRAY_SIZE(rw350r_perst_pad));
  36 }