src/soc/intel/common/block/acpi/gpio.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <acpi/acpigen.h>
   4
   5 static int acpigen_soc_gpio_op(const char *op, unsigned int gpio_num)
   6 {
   7         /* op (gpio_num) */
   8         acpigen_emit_namestring(op);
   9         acpigen_write_integer(gpio_num);
  10         return 0;
  11 }
  12
  13 static int acpigen_soc_get_gpio_state(const char *op, unsigned int gpio_num)
  14 {
  15         /* Store (op (gpio_num), Local0) */
  16         acpigen_write_store();
  17         acpigen_soc_gpio_op(op, gpio_num);
  18         acpigen_emit_byte(LOCAL0_OP);
  19         return 0;
  20 }
  21
  22 int acpigen_soc_read_rx_gpio(unsigned int gpio_num)
  23 {
  24         return acpigen_soc_get_gpio_state("\\_SB.PCI0.GRXS", gpio_num);
  25 }
  26
  27 int acpigen_soc_get_tx_gpio(unsigned int gpio_num)
  28 {
  29         return acpigen_soc_get_gpio_state("\\_SB.PCI0.GTXS", gpio_num);
  30 }
  31
  32 int acpigen_soc_set_tx_gpio(unsigned int gpio_num)
  33 {
  34         return acpigen_soc_gpio_op("\\_SB.PCI0.STXS", gpio_num);
  35 }
  36
  37 int acpigen_soc_clear_tx_gpio(unsigned int gpio_num)
  38 {
  39         return acpigen_soc_gpio_op("\\_SB.PCI0.CTXS", gpio_num);
  40 }