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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-16 07:10:39 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-16 07:10:39 +0300
commit273cbf61c3ddee9574ef1f4959b9bc6db5b24271 (patch)
tree1eb8a54d416453ad7c6adbf57ab05dce2587a012 /drivers/i2c/i2c-core-acpi.c
parent5fe7b600a116187e10317d83fb56922c4ef6b76d (diff)
parentcc6b9dfb2c5769afeb3335048173c730bdf8dbe1 (diff)
downloadlinux-273cbf61c3ddee9574ef1f4959b9bc6db5b24271.tar.xz
Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang: "New stuff from the I2C world: - in the core, getting irqs from ACPI is now similar to OF - new driver for MediaTek MT7621/7628/7688 SoCs - bcm2835, i801, and tegra drivers got some more attention - GPIO API cleanups - cleanups in the core headers - lots of usual driver updates" * 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (74 commits) i2c: mt7621: Fix platform_no_drv_owner.cocci warnings i2c: cpm: remove casting dma_alloc dt-bindings: i2c: sun6i-p2wi: Fix the binding example dt-bindings: i2c: mv64xxx: Fix the example compatible i2c: i801: Documentation update i2c: i801: Add support for Intel Tiger Lake i2c: i801: Fix PCI ID sorting dt-bindings: i2c-stm32: document optional dmas i2c: i2c-stm32f7: Add I2C_SMBUS_I2C_BLOCK_DATA support i2c: core: Tidy up handling of init_irq i2c: core: Move ACPI gpio IRQ handling into i2c_acpi_get_irq i2c: core: Move ACPI IRQ handling to probe time i2c: acpi: Factor out getting the IRQ from ACPI i2c: acpi: Use available IRQ helper functions i2c: core: Allow whole core to use i2c_dev_irq_from_resources eeprom: at24: modify a comment referring to platform data dt-bindings: i2c: omap: Add new compatible for J721E SoCs dt-bindings: i2c: mv64xxx: Add YAML schemas dt-bindings: i2c: sun6i-p2wi: Add YAML schemas i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driver ...
Diffstat (limited to 'drivers/i2c/i2c-core-acpi.c')
-rw-r--r--drivers/i2c/i2c-core-acpi.c58
1 files changed, 41 insertions, 17 deletions
diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 428a82c3a35f..4dbbc9a35f65 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -132,13 +132,52 @@ static int i2c_acpi_do_lookup(struct acpi_device *adev,
return 0;
}
+static int i2c_acpi_add_resource(struct acpi_resource *ares, void *data)
+{
+ int *irq = data;
+ struct resource r;
+
+ if (*irq <= 0 && acpi_dev_resource_interrupt(ares, 0, &r))
+ *irq = i2c_dev_irq_from_resources(&r, 1);
+
+ return 1; /* No need to add resource to the list */
+}
+
+/**
+ * i2c_acpi_get_irq - get device IRQ number from ACPI
+ * @client: Pointer to the I2C client device
+ *
+ * Find the IRQ number used by a specific client device.
+ *
+ * Return: The IRQ number or an error code.
+ */
+int i2c_acpi_get_irq(struct i2c_client *client)
+{
+ struct acpi_device *adev = ACPI_COMPANION(&client->dev);
+ struct list_head resource_list;
+ int irq = -ENOENT;
+ int ret;
+
+ INIT_LIST_HEAD(&resource_list);
+
+ ret = acpi_dev_get_resources(adev, &resource_list,
+ i2c_acpi_add_resource, &irq);
+ if (ret < 0)
+ return ret;
+
+ acpi_dev_free_resource_list(&resource_list);
+
+ if (irq == -ENOENT)
+ irq = acpi_dev_gpio_irq_get(adev, 0);
+
+ return irq;
+}
+
static int i2c_acpi_get_info(struct acpi_device *adev,
struct i2c_board_info *info,
struct i2c_adapter *adapter,
acpi_handle *adapter_handle)
{
- struct list_head resource_list;
- struct resource_entry *entry;
struct i2c_acpi_lookup lookup;
int ret;
@@ -172,21 +211,6 @@ static int i2c_acpi_get_info(struct acpi_device *adev,
if (adapter_handle)
*adapter_handle = lookup.adapter_handle;
- /* Then fill IRQ number if any */
- INIT_LIST_HEAD(&resource_list);
- ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
- if (ret < 0)
- return -EINVAL;
-
- resource_list_for_each_entry(entry, &resource_list) {
- if (resource_type(entry->res) == IORESOURCE_IRQ) {
- info->irq = entry->res->start;
- break;
- }
- }
-
- acpi_dev_free_resource_list(&resource_list);
-
acpi_set_modalias(adev, dev_name(&adev->dev), info->type,
sizeof(info->type));