2 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/arch/device.h>
10 #include <asm/arch/gpio.h>
11 #include <asm/arch/quark.h>
13 int board_early_init_f(void)
19 * Intel Galileo gen2 board uses GPIO Resume Well bank pin0 as the PERST# pin.
21 * We cannot use any public GPIO APIs in <asm-generic/gpio.h> to control this
22 * pin, as these APIs will eventually call into gpio_ich6_ofdata_to_platdata()
23 * in the Intel ICH6 GPIO driver where it calls PCI configuration space access
24 * APIs which will trigger PCI enumeration process.
26 * Check <asm/arch-quark/quark.h> for more details.
28 void board_assert_perst(void)
32 /* retrieve the GPIO IO base */
33 qrk_pci_read_config_dword(QUARK_LEGACY_BRIDGE, PCI_CFG_GPIOBASE, &base);
34 base = (base & 0xffff) & ~0x7f;
42 /* configure the pin as output */
48 /* pull it down (assert) */
55 void board_deassert_perst(void)
59 /* retrieve the GPIO IO base */
60 qrk_pci_read_config_dword(QUARK_LEGACY_BRIDGE, PCI_CFG_GPIOBASE, &base);
61 base = (base & 0xffff) & ~0x7f;
63 /* pull it up (de-assert) */
70 void setup_pch_gpios(u16 gpiobase, const struct pch_gpio_map *gpio)