static void spi_acpi_fill_ssdt_generator(struct device *dev)
{
struct drivers_spi_acpi_config *config = dev->chip_info;
const char *scope = acpi_device_scope(dev);
const char *path = acpi_device_path(dev);
struct acpi_spi spi = {
.device_select = dev->path.spi.cs,
.speed = config->speed ? : 1 * MHz,
.resource = scope,
.device_select_polarity = SPI_POLARITY_LOW,
.wire_mode = SPI_4_WIRE_MODE,
.data_bit_length = 8,
.clock_phase = SPI_CLOCK_PHASE_FIRST,
.clock_polarity = SPI_POLARITY_LOW,
};
int curr_index = 0;
int irq_gpio_index = -1;
int reset_gpio_index = -1;
int enable_gpio_index = -1;
if (!dev->enabled || !scope)
return;
if (spi_acpi_get_bus(dev) == -1) {
printk(BIOS_ERR, "%s: ERROR: Cannot get bus for device.\n",
dev_path(dev));
return;
}
if (!config->hid) {
printk(BIOS_ERR, "%s: ERROR: HID required.\n", dev_path(dev));
return;
}
/* Device */
acpigen_write_scope(scope);
acpigen_write_device(acpi_device_name(dev));
acpigen_write_name_string("_HID", config->hid);
if (config->cid)
acpigen_write_name_string("_CID", config->cid);
acpigen_write_name_integer("_UID", config->uid);
if (config->desc)
acpigen_write_name_string("_DDN", config->desc);
/* Resources */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_spi(&spi);
/* Use either Interrupt() or GpioInt() */
if (config->irq_gpio.pin_count)
irq_gpio_index = spi_acpi_write_gpio(&config->irq_gpio,
&curr_index);
else
acpi_device_write_interrupt(&config->irq);
/* Add enable/reset GPIOs if needed */
if (spi_acpi_add_gpios_to_crs(config)) {
reset_gpio_index = spi_acpi_write_gpio(&config->reset_gpio,
&curr_index);
enable_gpio_index = spi_acpi_write_gpio(&config->enable_gpio,
&curr_index);
}
acpigen_write_resourcetemplate_footer();
/* Wake capabilities */
if (config->wake) {
acpigen_write_name_integer("_S0W", 4);
acpigen_write_PRW(config->wake, 3);
};
/* Write device properties if needed */
if (config->compat_string || irq_gpio_index >= 0 ||
reset_gpio_index >= 0 || enable_gpio_index >= 0) {
struct acpi_dp *dsd = acpi_dp_new_table("_DSD");
if (config->compat_string)
acpi_dp_add_string(dsd, "compatible",
config->compat_string);
if (irq_gpio_index >= 0)
acpi_dp_add_gpio(dsd, "irq-gpios", path,
irq_gpio_index, 0,
config->irq_gpio.polarity);
if (reset_gpio_index >= 0)
acpi_dp_add_gpio(dsd, "reset-gpios", path,
reset_gpio_index, 0,
config->reset_gpio.polarity);
if (enable_gpio_index >= 0)
acpi_dp_add_gpio(dsd, "enable-gpios", path,
enable_gpio_index, 0,
config->enable_gpio.polarity);
acpi_dp_write(dsd);
}
/* Power Resource */
if (config->has_power_resource)
acpi_device_add_power_res(
&config->reset_gpio, config->reset_delay_ms,
&config->enable_gpio, config->enable_delay_ms);
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
printk(BIOS_INFO, "%s: %s at %s\n", path,
config->desc ? : dev->chip_ops->name, dev_path(dev));
}
static const char *spi_acpi_name(struct device *dev)
{
struct drivers_spi_acpi_config *config = dev->chip_info;
static char name[5];
if (config->name)
return config->name;
snprintf(name, sizeof(name), "S%03.3X", spi_acpi_get_bus(dev));
name[4] = '\0';
return name;
}
static struct device_operations spi_acpi_ops = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
.acpi_name = &spi_acpi_name,
.acpi_fill_ssdt_generator = &spi_acpi_fill_ssdt_generator,
};
static void spi_acpi_enable(struct device *dev)
{
dev->ops = &spi_acpi_ops;
}
struct chip_operations drivers_spi_acpi_ops = {
CHIP_NAME("SPI Device")
.enable_dev = &spi_acpi_enable
};
static void i2c_generic_fill_ssdt(struct device *dev)
{
struct drivers_i2c_generic_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 = config->speed ? : I2C_SPEED_FAST,
.resource = scope,
};
if (!dev->enabled || !scope)
return;
if (!config->hid) {
printk(BIOS_ERR, "%s: ERROR: HID required\n", dev_path(dev));
return;
}
/* Device */
acpigen_write_scope(scope);
acpigen_write_device(acpi_device_name(dev));
acpigen_write_name_string("_HID", config->hid);
acpigen_write_name_integer("_UID", config->uid);
acpigen_write_name_string("_DDN", config->desc);
acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
/* Resources */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_i2c(&i2c);
acpi_device_write_interrupt(&config->irq);
acpigen_write_resourcetemplate_footer();
/* Wake capabilities */
if (config->wake) {
acpigen_write_name_integer("_S0W", 4);
acpigen_write_PRW(config->wake, 3);
}
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));
}
/* Use name specified in config or build one from I2C address */
static const char *i2c_generic_acpi_name(struct device *dev)
{
struct drivers_i2c_generic_config *config = dev->chip_info;
static char name[5];
if (config->name)
return name;
snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
name[4] = '\0';
return name;
}
#endif
static struct device_operations i2c_generic_ops = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_NOOP,
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
.acpi_name = &i2c_generic_acpi_name,
.acpi_fill_ssdt_generator = &i2c_generic_fill_ssdt,
#endif
};
static void i2c_generic_enable(struct device *dev)
{
struct drivers_i2c_generic_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 = &i2c_generic_ops;
}
struct chip_operations drivers_i2c_generic_ops = {
CHIP_NAME("I2C Device")
.enable_dev = &i2c_generic_enable
};
