diff options
Diffstat (limited to 'src/drivers/i2c/sx9324/sx9324.c')
-rw-r--r-- | src/drivers/i2c/sx9324/sx9324.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/drivers/i2c/sx9324/sx9324.c b/src/drivers/i2c/sx9324/sx9324.c new file mode 100644 index 0000000000..2ca9f36345 --- /dev/null +++ b/src/drivers/i2c/sx9324/sx9324.c @@ -0,0 +1,104 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <acpi/acpi_device.h> +#include <acpi/acpigen.h> +#include <console/console.h> +#include <device/i2c_simple.h> +#include <device/device.h> +#include <device/path.h> +#include <string.h> +#include "chip.h" + +#define I2C_SX9324_ACPI_ID "STH9324" +#define I2C_SX9324_CHIP_NAME "Semtech SX9324" + +#define REGISTER(NAME) acpi_dp_add_integer(dsd, \ + I2C_SX9324_ACPI_ID "," #NAME, \ + config->NAME) + +static void i2c_sx9324_fill_ssdt(const struct device *dev) +{ + struct drivers_i2c_sx9324_config *config = dev->chip_info; + const char *scope = acpi_device_scope(dev); + struct acpi_i2c i2c = { + .address = dev->path.i2c.device, + .mode_10bit = dev->path.i2c.mode_10bit, + .speed = I2C_SPEED_FAST, + .resource = scope, + }; + struct acpi_dp *dsd; + + if (!scope || !config) + return; + + if (config->speed) + i2c.speed = config->speed; + + /* Device */ + acpigen_write_scope(scope); + acpigen_write_device(acpi_device_name(dev)); + acpigen_write_name_string("_HID", I2C_SX9324_ACPI_ID); + acpigen_write_name_integer("_UID", config->uid); + acpigen_write_name_string("_DDN", config->desc); + acpigen_write_STA(acpi_device_status(dev)); + + /* Resources */ + acpigen_write_name("_CRS"); + acpigen_write_resourcetemplate_header(); + acpi_device_write_i2c(&i2c); + + if (config->irq_gpio.pin_count) + acpi_device_write_gpio(&config->irq_gpio); + else + acpi_device_write_interrupt(&config->irq); + + acpigen_write_resourcetemplate_footer(); + + /* DSD */ + dsd = acpi_dp_new_table("_DSD"); +#include "registers.h" + acpi_dp_write(dsd); + + acpigen_pop_len(); /* Device */ + acpigen_pop_len(); /* Scope */ + + printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), + config->desc ? : dev->chip_ops->name, dev_path(dev)); +} + +#undef REGISTER + +static const char *i2c_sx9324_acpi_name(const struct device *dev) +{ + static char name[5]; + + snprintf(name, sizeof(name), "SX%02.2X", dev->path.i2c.device); + return name; +} + +static struct device_operations i2c_sx9324_ops = { + .read_resources = noop_read_resources, + .set_resources = noop_set_resources, + .acpi_name = i2c_sx9324_acpi_name, + .acpi_fill_ssdt = i2c_sx9324_fill_ssdt, +}; + +static void i2c_sx9324_enable(struct device *dev) +{ + struct drivers_i2c_sx9324_config *config = dev->chip_info; + + if (!config) { + dev->enabled = 0; + return; + } + + dev->ops = &i2c_sx9324_ops; + + if (config->desc) + dev->name = config->desc; +} + +struct chip_operations drivers_i2c_sx9324_ops = { + CHIP_NAME(I2C_SX9324_CHIP_NAME) + .enable_dev = i2c_sx9324_enable +}; |