/* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpi_device.h> #include <acpi/acpigen.h> #include <console/console.h> #include <device/device.h> #include <device/path.h> #include <gpio.h> #include "chip.h" #if CONFIG(HAVE_ACPI_TABLES) #define MAX98357A_ACPI_NAME "MAXM" static void max98357a_fill_ssdt(const struct device *dev) { struct drivers_generic_max98357a_config *config = dev->chip_info; const char *path; struct acpi_dp *dp; if (!dev->enabled || !config) return; const char *scope = acpi_device_scope(dev); const char *name = acpi_device_name(dev); if (!scope || !name) return; if (!config->hid) { printk(BIOS_ERR, "%s: ERROR: _HID required\n", dev_path(dev)); return; } /* Device */ acpigen_write_scope(scope); acpigen_write_device(name); acpigen_write_name_string("_HID", config->hid); acpigen_write_name_integer("_UID", 0); acpigen_write_name_string("_DDN", dev->chip_ops->name); acpigen_write_STA(acpi_device_status(dev)); /* Resources */ acpigen_write_name("_CRS"); acpigen_write_resourcetemplate_header(); acpi_device_write_gpio(&config->sdmode_gpio); acpigen_write_resourcetemplate_footer(); /* _DSD for devicetree properties */ /* This points to the first pin in the first gpio entry in _CRS */ path = acpi_device_path(dev); dp = acpi_dp_new_table("_DSD"); acpi_dp_add_gpio(dp, "sdmode-gpio", path, 0, 0, config->sdmode_gpio.active_low); acpi_dp_add_integer(dp, "sdmode-delay", config->sdmode_delay); acpi_dp_write(dp); acpigen_pop_len(); /* Device */ acpigen_pop_len(); /* Scope */ printk(BIOS_INFO, "%s: %s\n", path, dev->chip_ops->name); } static const char *max98357a_acpi_name(const struct device *dev) { return MAX98357A_ACPI_NAME; } #endif static struct device_operations max98357a_ops = { .read_resources = noop_read_resources, .set_resources = noop_set_resources, #if CONFIG(HAVE_ACPI_TABLES) .acpi_name = max98357a_acpi_name, .acpi_fill_ssdt = max98357a_fill_ssdt, #endif }; static void max98357a_enable(struct device *dev) { struct drivers_generic_max98357a_config *config = dev->chip_info; /* Check if device is present by reading GPIO */ if (config->device_present_gpio) { int present = gpio_get(config->device_present_gpio); present ^= config->device_present_gpio_invert; printk(BIOS_INFO, "%s is %spresent\n", dev->chip_ops->name, present ? "" : "not "); if (!present) { dev->enabled = 0; return; } } dev->ops = &max98357a_ops; } struct chip_operations drivers_generic_max98357a_ops = { CHIP_NAME("Maxim Integrated 98357A Amplifier") .enable_dev = max98357a_enable };