src/soc/amd/stoneyridge/aoac.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <amdblocks/aoac.h>
   4 #include <delay.h>
   5 #include <soc/aoac_defs.h>
   6 #include <soc/southbridge.h>
   7 #include <types.h>
   8
   9 /*
  10  * Table of devices that need their AOAC registers enabled and waited
  11  * upon (usually about .55 milliseconds). Instead of individual delays
  12  * waiting for each device to become available, a single delay will be
  13  * executed.
  14  */
  15 static const unsigned int aoac_devs[] = {
  16         FCH_AOAC_DEV_UART0 + CONFIG_UART_FOR_CONSOLE * 2,
  17         FCH_AOAC_DEV_AMBA,
  18         FCH_AOAC_DEV_I2C0,
  19         FCH_AOAC_DEV_I2C1,
  20         FCH_AOAC_DEV_I2C2,
  21         FCH_AOAC_DEV_I2C3,
  22 };
  23
  24 void wait_for_aoac_enabled(unsigned int dev)
  25 {
  26         while (!is_aoac_device_enabled(dev))
  27                 udelay(100);
  28 }
  29
  30 void enable_aoac_devices(void)
  31 {
  32         bool status;
  33         int i;
  34
  35         for (i = 0; i < ARRAY_SIZE(aoac_devs); i++)
  36                 power_on_aoac_device(aoac_devs[i]);
  37
  38         /* Wait for AOAC devices to indicate power and clock OK */
  39         do {
  40                 udelay(100);
  41                 status = true;
  42                 for (i = 0; i < ARRAY_SIZE(aoac_devs); i++)
  43                         status &= is_aoac_device_enabled(aoac_devs[i]);
  44         } while (!status);
  45 }