a461b694a6
Providing an explicit no-op function pointer is only necessary for `.read_resources` and `.set_resources`. All other device-operation pointers are optional and can be NULL. Change-Id: I3d139f7be86180558cabec04b8566873062e33be Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/40206 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org> Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* This file is part of the coreboot project. */
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#include <arch/acpi_device.h>
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#include <arch/acpigen.h>
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#include <console/console.h>
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#include <device/device.h>
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#include <device/path.h>
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#include <gpio.h>
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#include <stdint.h>
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#include "chip.h"
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#if CONFIG(HAVE_ACPI_TABLES)
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#define MAX98357A_ACPI_NAME "MAXM"
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static void max98357a_fill_ssdt(struct device *dev)
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{
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struct drivers_generic_max98357a_config *config = dev->chip_info;
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const char *path;
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struct acpi_dp *dp;
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if (!dev->enabled || !config)
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return;
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const char *scope = acpi_device_scope(dev);
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const char *name = acpi_device_name(dev);
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if (!scope || !name)
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return;
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/* Device */
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acpigen_write_scope(scope);
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acpigen_write_device(name);
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if (!config->hid) {
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printk(BIOS_ERR, "%s: ERROR: _HID required\n", dev_path(dev));
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return;
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}
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acpigen_write_name_string("_HID", config->hid);
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acpigen_write_name_integer("_UID", 0);
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acpigen_write_name_string("_DDN", dev->chip_ops->name);
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acpigen_write_STA(acpi_device_status(dev));
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/* Resources */
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acpigen_write_name("_CRS");
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acpigen_write_resourcetemplate_header();
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acpi_device_write_gpio(&config->sdmode_gpio);
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acpigen_write_resourcetemplate_footer();
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/* _DSD for devicetree properties */
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/* This points to the first pin in the first gpio entry in _CRS */
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path = acpi_device_path(dev);
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dp = acpi_dp_new_table("_DSD");
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acpi_dp_add_gpio(dp, "sdmode-gpio", path, 0, 0,
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config->sdmode_gpio.polarity);
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acpi_dp_add_integer(dp, "sdmode-delay", config->sdmode_delay);
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acpi_dp_write(dp);
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acpigen_pop_len(); /* Device */
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acpigen_pop_len(); /* Scope */
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printk(BIOS_INFO, "%s: %s\n", path, dev->chip_ops->name);
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}
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static const char *max98357a_acpi_name(const struct device *dev)
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{
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return MAX98357A_ACPI_NAME;
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}
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#endif
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static struct device_operations max98357a_ops = {
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.read_resources = DEVICE_NOOP,
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.set_resources = DEVICE_NOOP,
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#if CONFIG(HAVE_ACPI_TABLES)
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.acpi_name = max98357a_acpi_name,
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.acpi_fill_ssdt = max98357a_fill_ssdt,
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#endif
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};
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static void max98357a_enable(struct device *dev)
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{
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struct drivers_generic_max98357a_config *config = dev->chip_info;
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/* Check if device is present by reading GPIO */
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if (config->device_present_gpio) {
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int present = gpio_get(config->device_present_gpio);
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present ^= config->device_present_gpio_invert;
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printk(BIOS_INFO, "%s is %spresent\n",
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dev->chip_ops->name, present ? "" : "not ");
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if (!present) {
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dev->enabled = 0;
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return;
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}
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}
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dev->ops = &max98357a_ops;
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}
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struct chip_operations drivers_generic_max98357a_ops = {
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CHIP_NAME("Maxim Integrated 98357A Amplifier")
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.enable_dev = max98357a_enable
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};
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