diff options
Diffstat (limited to 'drivers/platform/x86/i2c-multi-instantiate.c')
| -rw-r--r-- | drivers/platform/x86/i2c-multi-instantiate.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/drivers/platform/x86/i2c-multi-instantiate.c b/drivers/platform/x86/i2c-multi-instantiate.c deleted file mode 100644 index 4956a1df5b90..000000000000 --- a/drivers/platform/x86/i2c-multi-instantiate.c +++ /dev/null @@ -1,174 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * I2C multi-instantiate driver, pseudo driver to instantiate multiple - * i2c-clients from a single fwnode. - * - * Copyright 2018 Hans de Goede <hdegoede@redhat.com> - */ - -#include <linux/acpi.h> -#include <linux/bits.h> -#include <linux/i2c.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/property.h> -#include <linux/types.h> - -#define IRQ_RESOURCE_TYPE GENMASK(1, 0) -#define IRQ_RESOURCE_NONE 0 -#define IRQ_RESOURCE_GPIO 1 -#define IRQ_RESOURCE_APIC 2 - -struct i2c_inst_data { - const char *type; - unsigned int flags; - int irq_idx; -}; - -struct i2c_multi_inst_data { - int num_clients; - struct i2c_client *clients[]; -}; - -static int i2c_multi_inst_probe(struct platform_device *pdev) -{ - struct i2c_multi_inst_data *multi; - const struct i2c_inst_data *inst_data; - struct i2c_board_info board_info = {}; - struct device *dev = &pdev->dev; - struct acpi_device *adev; - char name[32]; - int i, ret; - - inst_data = device_get_match_data(dev); - if (!inst_data) { - dev_err(dev, "Error ACPI match data is missing\n"); - return -ENODEV; - } - - adev = ACPI_COMPANION(dev); - - /* Count number of clients to instantiate */ - ret = i2c_acpi_client_count(adev); - if (ret < 0) - return ret; - - multi = devm_kmalloc(dev, struct_size(multi, clients, ret), GFP_KERNEL); - if (!multi) - return -ENOMEM; - - multi->num_clients = ret; - - for (i = 0; i < multi->num_clients && inst_data[i].type; i++) { - memset(&board_info, 0, sizeof(board_info)); - strlcpy(board_info.type, inst_data[i].type, I2C_NAME_SIZE); - snprintf(name, sizeof(name), "%s-%s.%d", dev_name(dev), - inst_data[i].type, i); - board_info.dev_name = name; - switch (inst_data[i].flags & IRQ_RESOURCE_TYPE) { - case IRQ_RESOURCE_GPIO: - ret = acpi_dev_gpio_irq_get(adev, inst_data[i].irq_idx); - if (ret < 0) { - dev_err(dev, "Error requesting irq at index %d: %d\n", - inst_data[i].irq_idx, ret); - goto error; - } - board_info.irq = ret; - break; - case IRQ_RESOURCE_APIC: - ret = platform_get_irq(pdev, inst_data[i].irq_idx); - if (ret < 0) { - dev_dbg(dev, "Error requesting irq at index %d: %d\n", - inst_data[i].irq_idx, ret); - goto error; - } - board_info.irq = ret; - break; - default: - board_info.irq = 0; - break; - } - multi->clients[i] = i2c_acpi_new_device(dev, i, &board_info); - if (IS_ERR(multi->clients[i])) { - ret = dev_err_probe(dev, PTR_ERR(multi->clients[i]), - "Error creating i2c-client, idx %d\n", i); - goto error; - } - } - if (i < multi->num_clients) { - dev_err(dev, "Error finding driver, idx %d\n", i); - ret = -ENODEV; - goto error; - } - - platform_set_drvdata(pdev, multi); - return 0; - -error: - while (--i >= 0) - i2c_unregister_device(multi->clients[i]); - - return ret; -} - -static int i2c_multi_inst_remove(struct platform_device *pdev) -{ - struct i2c_multi_inst_data *multi = platform_get_drvdata(pdev); - int i; - - for (i = 0; i < multi->num_clients; i++) - i2c_unregister_device(multi->clients[i]); - - return 0; -} - -static const struct i2c_inst_data bsg1160_data[] = { - { "bmc150_accel", IRQ_RESOURCE_GPIO, 0 }, - { "bmc150_magn" }, - { "bmg160" }, - {} -}; - -static const struct i2c_inst_data bsg2150_data[] = { - { "bmc150_accel", IRQ_RESOURCE_GPIO, 0 }, - { "bmc150_magn" }, - /* The resources describe a 3th client, but it is not really there. */ - { "bsg2150_dummy_dev" }, - {} -}; - -static const struct i2c_inst_data int3515_data[] = { - { "tps6598x", IRQ_RESOURCE_APIC, 0 }, - { "tps6598x", IRQ_RESOURCE_APIC, 1 }, - { "tps6598x", IRQ_RESOURCE_APIC, 2 }, - { "tps6598x", IRQ_RESOURCE_APIC, 3 }, - {} -}; - -/* - * Note new device-ids must also be added to i2c_multi_instantiate_ids in - * drivers/acpi/scan.c: acpi_device_enumeration_by_parent(). - */ -static const struct acpi_device_id i2c_multi_inst_acpi_ids[] = { - { "BSG1160", (unsigned long)bsg1160_data }, - { "BSG2150", (unsigned long)bsg2150_data }, - { "INT3515", (unsigned long)int3515_data }, - { } -}; -MODULE_DEVICE_TABLE(acpi, i2c_multi_inst_acpi_ids); - -static struct platform_driver i2c_multi_inst_driver = { - .driver = { - .name = "I2C multi instantiate pseudo device driver", - .acpi_match_table = i2c_multi_inst_acpi_ids, - }, - .probe = i2c_multi_inst_probe, - .remove = i2c_multi_inst_remove, -}; -module_platform_driver(i2c_multi_inst_driver); - -MODULE_DESCRIPTION("I2C multi instantiate pseudo device driver"); -MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>"); -MODULE_LICENSE("GPL"); |