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x86: broadwell: Add a pinctrl driver
GPIO pins need to be set up on start-up. Add a driver to provide this, configured from the device tree. The binding is slightly different from the existing ICH6 binding, since that is quite verbose. The new binding should be just as extensible. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
Bin Meng
parent
1e6f4e5886
commit
b24f5c4f27
5 changed files with 590 additions and 0 deletions
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@ -7,3 +7,4 @@
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obj-y += cpu.o
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obj-y += iobp.o
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obj-y += pch.o
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obj-y += pinctrl_broadwell.o
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278
arch/x86/cpu/broadwell/pinctrl_broadwell.c
Normal file
278
arch/x86/cpu/broadwell/pinctrl_broadwell.c
Normal file
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@ -0,0 +1,278 @@
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/*
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* Copyright (C) 2016 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <pch.h>
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#include <pci.h>
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#include <asm/cpu.h>
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <asm/pci.h>
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#include <asm/arch/gpio.h>
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#include <dt-bindings/gpio/x86-gpio.h>
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#include <dm/pinctrl.h>
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DECLARE_GLOBAL_DATA_PTR;
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enum {
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MAX_GPIOS = 95,
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};
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#define PIRQ_SHIFT 16
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#define CONF_MASK 0xffff
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struct pin_info {
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int node;
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int phandle;
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bool mode_gpio;
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bool dir_input;
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bool invert;
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bool trigger_level;
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bool output_high;
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bool sense_disable;
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bool owner_gpio;
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bool route_smi;
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bool irq_enable;
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bool reset_rsmrst;
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bool pirq_apic_route;
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};
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static int broadwell_pinctrl_read_configs(struct udevice *dev,
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struct pin_info *conf, int max_pins)
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{
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const void *blob = gd->fdt_blob;
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int count = 0;
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int node;
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debug("%s: starting\n", __func__);
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for (node = fdt_first_subnode(blob, dev->of_offset);
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node > 0;
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node = fdt_next_subnode(blob, node)) {
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int phandle = fdt_get_phandle(blob, node);
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if (!phandle)
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continue;
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if (count == max_pins)
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return -ENOSPC;
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/* We've found a new configuration */
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memset(conf, '\0', sizeof(*conf));
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conf->node = node;
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conf->phandle = phandle;
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conf->mode_gpio = fdtdec_get_bool(blob, node, "mode-gpio");
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if (fdtdec_get_int(blob, node, "direction", -1) == PIN_INPUT)
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conf->dir_input = true;
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conf->invert = fdtdec_get_bool(blob, node, "invert");
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if (fdtdec_get_int(blob, node, "trigger", -1) == TRIGGER_LEVEL)
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conf->trigger_level = true;
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if (fdtdec_get_int(blob, node, "output-value", -1) == 1)
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conf->output_high = true;
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conf->sense_disable = fdtdec_get_bool(blob, node,
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"sense-disable");
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if (fdtdec_get_int(blob, node, "owner", -1) == OWNER_GPIO)
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conf->owner_gpio = true;
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if (fdtdec_get_int(blob, node, "route", -1) == ROUTE_SMI)
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conf->route_smi = true;
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conf->irq_enable = fdtdec_get_bool(blob, node, "irq-enable");
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conf->reset_rsmrst = fdtdec_get_bool(blob, node,
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"reset-rsmrst");
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if (fdtdec_get_int(blob, node, "pirq-apic", -1) ==
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PIRQ_APIC_ROUTE)
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conf->pirq_apic_route = true;
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debug("config: phandle=%d\n", phandle);
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count++;
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conf++;
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}
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debug("%s: Found %d configurations\n", __func__, count);
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return count;
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}
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static int broadwell_pinctrl_lookup_phandle(struct pin_info *conf,
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int conf_count, int phandle)
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{
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int i;
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for (i = 0; i < conf_count; i++) {
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if (conf[i].phandle == phandle)
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return i;
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}
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return -ENOENT;
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}
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static int broadwell_pinctrl_read_pins(struct udevice *dev,
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struct pin_info *conf, int conf_count, int gpio_conf[],
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int num_gpios)
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{
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const void *blob = gd->fdt_blob;
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int count = 0;
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int node;
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for (node = fdt_first_subnode(blob, dev->of_offset);
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node > 0;
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node = fdt_next_subnode(blob, node)) {
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int len, i;
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const u32 *prop = fdt_getprop(blob, node, "config", &len);
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if (!prop)
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continue;
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/* There are three cells per pin */
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count = len / (sizeof(u32) * 3);
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debug("Found %d GPIOs to configure\n", count);
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for (i = 0; i < count; i++) {
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uint gpio = fdt32_to_cpu(prop[i * 3]);
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uint phandle = fdt32_to_cpu(prop[i * 3 + 1]);
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int val;
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if (gpio >= num_gpios) {
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debug("%s: GPIO %d out of range\n", __func__,
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gpio);
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return -EDOM;
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}
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val = broadwell_pinctrl_lookup_phandle(conf, conf_count,
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phandle);
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if (val < 0) {
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debug("%s: Cannot find phandle %d\n", __func__,
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phandle);
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return -EINVAL;
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}
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gpio_conf[gpio] = val |
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fdt32_to_cpu(prop[i * 3 + 2]) << PIRQ_SHIFT;
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}
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}
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return 0;
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}
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static void broadwell_pinctrl_commit(struct pch_lp_gpio_regs *regs,
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struct pin_info *pin_info,
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int gpio_conf[], int count)
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{
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u32 owner_gpio[GPIO_BANKS] = {0};
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u32 route_smi[GPIO_BANKS] = {0};
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u32 irq_enable[GPIO_BANKS] = {0};
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u32 reset_rsmrst[GPIO_BANKS] = {0};
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u32 pirq2apic = 0;
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int set, bit, gpio = 0;
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for (gpio = 0; gpio < MAX_GPIOS; gpio++) {
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int confnum = gpio_conf[gpio] & CONF_MASK;
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struct pin_info *pin = &pin_info[confnum];
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u32 val;
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val = pin->mode_gpio << CONFA_MODE_SHIFT |
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pin->dir_input << CONFA_DIR_SHIFT |
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pin->invert << CONFA_INVERT_SHIFT |
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pin->trigger_level << CONFA_TRIGGER_SHIFT |
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pin->output_high << CONFA_OUTPUT_SHIFT;
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outl(val, ®s->config[gpio].conf_a);
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outl(pin->sense_disable << CONFB_SENSE_SHIFT,
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®s->config[gpio].conf_b);
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/* Determine set and bit based on GPIO number */
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set = gpio / GPIO_PER_BANK;
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bit = gpio % GPIO_PER_BANK;
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/* Apply settings to set specific bits */
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owner_gpio[set] |= pin->owner_gpio << bit;
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route_smi[set] |= pin->route_smi << bit;
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irq_enable[set] |= pin->irq_enable << bit;
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reset_rsmrst[set] |= pin->reset_rsmrst << bit;
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/* PIRQ to IO-APIC map */
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if (pin->pirq_apic_route)
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pirq2apic |= gpio_conf[gpio] >> PIRQ_SHIFT;
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debug("gpio %d: conf %d, mode_gpio %d, dir_input %d, output_high %d\n",
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gpio, confnum, pin->mode_gpio, pin->dir_input,
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pin->output_high);
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}
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for (set = 0; set < GPIO_BANKS; set++) {
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outl(owner_gpio[set], ®s->own[set]);
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outl(route_smi[set], ®s->gpi_route[set]);
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outl(irq_enable[set], ®s->gpi_ie[set]);
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outl(reset_rsmrst[set], ®s->rst_sel[set]);
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}
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outl(pirq2apic, ®s->pirq_to_ioxapic);
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}
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static int broadwell_pinctrl_probe(struct udevice *dev)
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{
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struct pch_lp_gpio_regs *regs;
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struct pin_info conf[12];
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int gpio_conf[MAX_GPIOS];
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struct udevice *pch;
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int conf_count;
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u32 gpiobase;
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int ret;
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ret = uclass_first_device(UCLASS_PCH, &pch);
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if (ret)
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return ret;
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if (!pch)
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return -ENODEV;
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debug("%s: start\n", __func__);
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/* Only init once, before relocation */
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if (gd->flags & GD_FLG_RELOC)
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return 0;
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/*
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* Get the memory/io base address to configure every pins.
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* IOBASE is used to configure the mode/pads
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* GPIOBASE is used to configure the direction and default value
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*/
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ret = pch_get_gpio_base(pch, &gpiobase);
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if (ret) {
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debug("%s: invalid GPIOBASE address (%08x)\n", __func__,
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gpiobase);
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return -EINVAL;
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}
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conf_count = broadwell_pinctrl_read_configs(dev, conf,
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ARRAY_SIZE(conf));
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if (conf_count < 0) {
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debug("%s: Cannot read configs: err=%d\n", __func__, ret);
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return conf_count;
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}
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/*
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* Assume that pin settings are provided for every pin. Pins not
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* mentioned will get the first config mentioned in the list.
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*/
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ret = broadwell_pinctrl_read_pins(dev, conf, conf_count, gpio_conf,
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MAX_GPIOS);
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if (ret) {
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debug("%s: Cannot read pin settings: err=%d\n", __func__, ret);
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return ret;
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}
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regs = (struct pch_lp_gpio_regs *)gpiobase;
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broadwell_pinctrl_commit(regs, conf, gpio_conf, ARRAY_SIZE(conf));
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debug("%s: done\n", __func__);
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return 0;
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}
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static const struct udevice_id broadwell_pinctrl_match[] = {
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{ .compatible = "intel,x86-broadwell-pinctrl",
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.data = X86_SYSCON_PINCONF },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(broadwell_pinctrl) = {
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.name = "broadwell_pinctrl",
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.id = UCLASS_SYSCON,
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.of_match = broadwell_pinctrl_match,
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.probe = broadwell_pinctrl_probe,
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};
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91
arch/x86/include/asm/arch-broadwell/gpio.h
Normal file
91
arch/x86/include/asm/arch-broadwell/gpio.h
Normal file
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@ -0,0 +1,91 @@
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/*
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* Copyright (c) 2016 Google, Inc
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*
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* From Coreboot src/soc/intel/broadwell/include/soc/gpio.h
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#ifndef __ASM_ARCH_GPIO
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#define __ASM_ARCH_GPIO
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#define GPIO_PER_BANK 32
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#define GPIO_BANKS 3
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struct broadwell_bank_platdata {
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uint16_t base_addr;
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const char *bank_name;
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int bank;
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};
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/* PCH-LP GPIOBASE Registers */
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struct pch_lp_gpio_regs {
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u32 own[GPIO_BANKS];
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u32 reserved0;
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u16 pirq_to_ioxapic;
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u16 reserved1[3];
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u32 blink;
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u32 ser_blink;
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u32 ser_blink_cmdsts;
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u32 ser_blink_data;
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u16 gpi_nmi_en;
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u16 gpi_nmi_sts;
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u32 reserved2;
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u32 gpi_route[GPIO_BANKS];
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u32 reserved3;
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u32 reserved4[4];
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u32 alt_gpi_smi_sts;
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u32 alt_gpi_smi_en;
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u32 reserved5[2];
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u32 rst_sel[GPIO_BANKS];
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u32 reserved6;
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u32 reserved9[3];
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u32 gpio_gc;
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u32 gpi_is[GPIO_BANKS];
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u32 reserved10;
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u32 gpi_ie[GPIO_BANKS];
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u32 reserved11;
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u32 reserved12[24];
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struct {
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u32 conf_a;
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u32 conf_b;
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} config[GPIO_BANKS * GPIO_PER_BANK];
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};
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check_member(pch_lp_gpio_regs, gpi_ie[0], 0x90);
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check_member(pch_lp_gpio_regs, config[0], 0x100);
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enum {
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CONFA_MODE_SHIFT = 0,
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CONFA_MODE_GPIO = 1 << CONFA_MODE_SHIFT,
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CONFA_DIR_SHIFT = 2,
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CONFA_DIR_INPUT = 1 << CONFA_DIR_SHIFT,
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CONFA_INVERT_SHIFT = 3,
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CONFA_INVERT = 1 << CONFA_INVERT_SHIFT,
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CONFA_TRIGGER_SHIFT = 4,
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CONFA_TRIGGER_LEVEL = 1 << CONFA_TRIGGER_SHIFT,
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CONFA_LEVEL_SHIFT = 30,
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CONFA_LEVEL_HIGH = 1UL << CONFA_LEVEL_SHIFT,
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CONFA_OUTPUT_SHIFT = 31,
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CONFA_OUTPUT_HIGH = 1UL << CONFA_OUTPUT_SHIFT,
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CONFB_SENSE_SHIFT = 2,
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CONFB_SENSE_DISABLE = 1 << CONFB_SENSE_SHIFT,
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};
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#endif
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208
doc/device-tree-bindings/gpio/intel,x86-broadwell-pinctrl.txt
Normal file
208
doc/device-tree-bindings/gpio/intel,x86-broadwell-pinctrl.txt
Normal file
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@ -0,0 +1,208 @@
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Intel x86 PINCTRL/GPIO controller
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Pin-muxing on broadwell devices can be described with a node for the PINCTRL
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master node and a set of child nodes for each required pin state on the SoC.
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These pin states use phandles and are referred to but a configuration section
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which lists all pins in the device.
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The PINCTRL master node requires the following properties:
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- compatible : "intel,x86-broadwell-pinctrl"
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Pin state nodes must be sub-nodes of the pinctrl master node. The must have
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a phandle. They can contain the following optional properties:
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- mode-gpio - forces the pin into GPIO mode
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- output-value - sets the default output value of the GPIO, 0 (low, default)
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or 1 (high)
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- direction - sets the direction of the gpio, either PIN_INPUT (default)
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or PIN_OUTPUT
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- invert - the input pin is inverted
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- trigger - sets the trigger type, either TRIGGER_EDGE (default) or
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TRIGGER_LEVEL
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- sense-disable - the input state sense is disabled
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- owner 0 sets the owner of the pin, either OWNER_ACPI (default) or
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ONWER_GPIO
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- route - sets whether the pin is routed, either PIRQ_APIC_MASK or
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PIRQ_APIC_ROUTE
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- irq-enable - the interrupt is enabled
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- reset-rsmrst - the pin will only be reset by RSMRST
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- pirq-apic - the pin will be routed to the IOxAPIC
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The first pin state will be the default, so pins without a configuration will
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use that.
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The pin configuration node is also a sub-node of the pinctrl master node, but
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does not have a phandle. It has a single property:
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- config - configuration to use for each pin. Each entry has of 3 cells:
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- GPIO number (0..94)
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- phandle of configuration (above)
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- interrupt number (0..15)
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There should be one entry for each pin (i.e. 95 entries).
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But missing pins will receive the default configuration.
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Example:
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pch_pinctrl {
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compatible = "intel,x86-broadwell-pinctrl";
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/* Put this first: it is the default */
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gpio_unused: gpio-unused {
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mode-gpio;
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direction = <PIN_INPUT>;
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owner = <OWNER_GPIO>;
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sense-disable;
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};
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gpio_acpi_sci: acpi-sci {
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mode-gpio;
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direction = <PIN_INPUT>;
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invert;
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route = <ROUTE_SCI>;
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};
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gpio_acpi_smi: acpi-smi {
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mode-gpio;
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direction = <PIN_INPUT>;
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invert;
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route = <ROUTE_SMI>;
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};
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gpio_input: gpio-input {
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mode-gpio;
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direction = <PIN_INPUT>;
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owner = <OWNER_GPIO>;
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};
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gpio_input_invert: gpio-input-invert {
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mode-gpio;
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direction = <PIN_INPUT>;
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owner = <OWNER_GPIO>;
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invert;
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};
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|
||||
gpio_native: gpio-native {
|
||||
};
|
||||
|
||||
gpio_out_high: gpio-out-high {
|
||||
mode-gpio;
|
||||
direction = <PIN_OUTPUT>;
|
||||
output-value = <1>;
|
||||
owner = <OWNER_GPIO>;
|
||||
sense-disable;
|
||||
};
|
||||
|
||||
gpio_out_low: gpio-out-low {
|
||||
mode-gpio;
|
||||
direction = <PIN_OUTPUT>;
|
||||
output-value = <0>;
|
||||
owner = <OWNER_GPIO>;
|
||||
sense-disable;
|
||||
};
|
||||
|
||||
gpio_pirq: gpio-pirq {
|
||||
mode-gpio;
|
||||
direction = <PIN_INPUT>;
|
||||
owner = <OWNER_GPIO>;
|
||||
pirq-apic = <PIRQ_APIC_ROUTE>;
|
||||
};
|
||||
|
||||
soc_gpio@0 {
|
||||
config =
|
||||
<0 &gpio_unused 0>, /* unused */
|
||||
<1 &gpio_unused 0>, /* unused */
|
||||
<2 &gpio_unused 0>, /* unused */
|
||||
<3 &gpio_unused 0>, /* unused */
|
||||
<4 &gpio_native 0>, /* native: i2c0_sda_gpio4 */
|
||||
<5 &gpio_native 0>, /* native: i2c0_scl_gpio5 */
|
||||
<6 &gpio_native 0>, /* native: i2c1_sda_gpio6 */
|
||||
<7 &gpio_native 0>, /* native: i2c1_scl_gpio7 */
|
||||
<8 &gpio_acpi_sci 0>, /* pch_lte_wake_l */
|
||||
<9 &gpio_input_invert 0>,/* trackpad_int_l (wake) */
|
||||
<10 &gpio_acpi_sci 0>, /* pch_wlan_wake_l */
|
||||
<11 &gpio_unused 0>, /* unused */
|
||||
<12 &gpio_unused 0>, /* unused */
|
||||
<13 &gpio_pirq 3>, /* trackpad_int_l (pirql) */
|
||||
<14 &gpio_pirq 4>, /* touch_int_l (pirqm) */
|
||||
<15 &gpio_unused 0>, /* unused (strap) */
|
||||
<16 &gpio_input 0>, /* pch_wp */
|
||||
<17 &gpio_unused 0>, /* unused */
|
||||
<18 &gpio_unused 0>, /* unused */
|
||||
<19 &gpio_unused 0>, /* unused */
|
||||
<20 &gpio_native 0>, /* pcie_wlan_clkreq_l */
|
||||
<21 &gpio_out_high 0>, /* pp3300_ssd_en */
|
||||
<22 &gpio_unused 0>, /* unused */
|
||||
<23 &gpio_out_low 0>, /* pp3300_autobahn_en */
|
||||
<24 &gpio_unused 0>, /* unused */
|
||||
<25 &gpio_input 0>, /* ec_in_rw */
|
||||
<26 &gpio_unused 0>, /* unused */
|
||||
<27 &gpio_acpi_sci 0>, /* pch_wake_l */
|
||||
<28 &gpio_unused 0>, /* unused */
|
||||
<29 &gpio_unused 0>, /* unused */
|
||||
<30 &gpio_native 0>, /* native: pch_suswarn_l */
|
||||
<31 &gpio_native 0>, /* native: acok_buf */
|
||||
<32 &gpio_native 0>, /* native: lpc_clkrun_l */
|
||||
<33 &gpio_native 0>, /* native: ssd_devslp */
|
||||
<34 &gpio_acpi_smi 0>, /* ec_smi_l */
|
||||
<35 &gpio_acpi_smi 0>, /* pch_nmi_dbg_l (route in nmi_en) */
|
||||
<36 &gpio_acpi_sci 0>, /* ec_sci_l */
|
||||
<37 &gpio_unused 0>, /* unused */
|
||||
<38 &gpio_unused 0>, /* unused */
|
||||
<39 &gpio_unused 0>, /* unused */
|
||||
<40 &gpio_native 0>, /* native: pch_usb1_oc_l */
|
||||
<41 &gpio_native 0>, /* native: pch_usb2_oc_l */
|
||||
<42 &gpio_unused 0>, /* wlan_disable_l */
|
||||
<43 &gpio_out_high 0>, /* pp1800_codec_en */
|
||||
<44 &gpio_unused 0>, /* unused */
|
||||
<45 &gpio_acpi_sci 0>, /* dsp_int - codec wake */
|
||||
<46 &gpio_pirq 6>, /* hotword_det_l_3v3 (pirqo) - codec irq */
|
||||
<47 &gpio_out_low 0>, /* ssd_reset_l */
|
||||
<48 &gpio_unused 0>, /* unused */
|
||||
<49 &gpio_unused 0>, /* unused */
|
||||
<50 &gpio_unused 0>, /* unused */
|
||||
<51 &gpio_unused 0>, /* unused */
|
||||
<52 &gpio_input 0>, /* sim_det */
|
||||
<53 &gpio_unused 0>, /* unused */
|
||||
<54 &gpio_unused 0>, /* unused */
|
||||
<55 &gpio_unused 0>, /* unused */
|
||||
<56 &gpio_unused 0>, /* unused */
|
||||
<57 &gpio_out_high 0>, /* codec_reset_l */
|
||||
<58 &gpio_unused 0>, /* unused */
|
||||
<59 &gpio_out_high 0>, /* lte_disable_l */
|
||||
<60 &gpio_unused 0>, /* unused */
|
||||
<61 &gpio_native 0>, /* native: pch_sus_stat */
|
||||
<62 &gpio_native 0>, /* native: pch_susclk */
|
||||
<63 &gpio_native 0>, /* native: pch_slp_s5_l */
|
||||
<64 &gpio_unused 0>, /* unused */
|
||||
<65 &gpio_input 0>, /* ram_id3 */
|
||||
<66 &gpio_input 0>, /* ram_id3_old (strap) */
|
||||
<67 &gpio_input 0>, /* ram_id0 */
|
||||
<68 &gpio_input 0>, /* ram_id1 */
|
||||
<69 &gpio_input 0>, /* ram_id2 */
|
||||
<70 &gpio_unused 0>, /* unused */
|
||||
<71 &gpio_native 0>, /* native: modphy_en */
|
||||
<72 &gpio_unused 0>, /* unused */
|
||||
<73 &gpio_unused 0>, /* unused */
|
||||
<74 &gpio_unused 0>, /* unused */
|
||||
<75 &gpio_unused 0>, /* unused */
|
||||
<76 &gpio_unused 0>, /* unused */
|
||||
<77 &gpio_unused 0>, /* unused */
|
||||
<78 &gpio_unused 0>, /* unused */
|
||||
<79 &gpio_unused 0>, /* unused */
|
||||
<80 &gpio_unused 0>, /* unused */
|
||||
<81 &gpio_unused 0>, /* unused */
|
||||
<82 &gpio_native 0>, /* native: ec_rcin_l */
|
||||
<83 &gpio_native 0>, /* gspi0_cs */
|
||||
<84 &gpio_native 0>, /* gspi0_clk */
|
||||
<85 &gpio_native 0>, /* gspi0_miso */
|
||||
<86 &gpio_native 0>, /* gspi0_mosi (strap) */
|
||||
<87 &gpio_unused 0>, /* unused */
|
||||
<88 &gpio_unused 0>, /* unused */
|
||||
<89 &gpio_out_high 0>, /* pp3300_sd_en */
|
||||
<90 &gpio_unused 0>, /* unused */
|
||||
<91 &gpio_unused 0>, /* unused */
|
||||
<92 &gpio_unused 0>, /* unused */
|
||||
<93 &gpio_unused 0>, /* unused */
|
||||
<94 &gpio_unused 0 >; /* unused */
|
||||
};
|
||||
};
|
||||
|
|
@ -28,4 +28,16 @@
|
|||
#define PULL_STR_2K 0
|
||||
#define PULL_STR_20K 2
|
||||
|
||||
#define ROUTE_SCI 0
|
||||
#define ROUTE_SMI 1
|
||||
|
||||
#define OWNER_ACPI 0
|
||||
#define OWNER_GPIO 1
|
||||
|
||||
#define PIRQ_APIC_MASK 0
|
||||
#define PIRQ_APIC_ROUTE 1
|
||||
|
||||
#define TRIGGER_EDGE 0
|
||||
#define TRIGGER_LEVEL 1
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue