diff options
| -rw-r--r-- | drivers/platform/x86/x86-android-tablets/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/platform/x86/x86-android-tablets/core.c | 37 | ||||
| -rw-r--r-- | drivers/platform/x86/x86-android-tablets/x86-android-tablets.h | 1 |
3 files changed, 40 insertions, 2 deletions
diff --git a/drivers/platform/x86/x86-android-tablets/Kconfig b/drivers/platform/x86/x86-android-tablets/Kconfig index 88d9e8f2ff24..a67bddc43007 100644 --- a/drivers/platform/x86/x86-android-tablets/Kconfig +++ b/drivers/platform/x86/x86-android-tablets/Kconfig @@ -5,7 +5,9 @@ config X86_ANDROID_TABLETS tristate "X86 Android tablet support" - depends on I2C && SPI && SERIAL_DEV_BUS && ACPI && EFI && GPIOLIB && PMIC_OPREGION + depends on I2C && SPI && SERIAL_DEV_BUS + depends on GPIOLIB && PMIC_OPREGION + depends on ACPI && EFI && PCI select NEW_LEDS select LEDS_CLASS help diff --git a/drivers/platform/x86/x86-android-tablets/core.c b/drivers/platform/x86/x86-android-tablets/core.c index 2848f651e00b..9551cdbac4fc 100644 --- a/drivers/platform/x86/x86-android-tablets/core.c +++ b/drivers/platform/x86/x86-android-tablets/core.c @@ -11,11 +11,13 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/acpi.h> +#include <linux/device.h> #include <linux/dmi.h> #include <linux/gpio/consumer.h> #include <linux/gpio/machine.h> #include <linux/irq.h> #include <linux/module.h> +#include <linux/pci.h> #include <linux/platform_device.h> #include <linux/serdev.h> #include <linux/string.h> @@ -170,6 +172,35 @@ get_i2c_adap_by_handle(const struct x86_i2c_client_info *client_info) return i2c_acpi_find_adapter_by_handle(handle); } +static __init int match_parent(struct device *dev, const void *data) +{ + return dev->parent == data; +} + +static struct i2c_adapter * +get_i2c_adap_by_pci_parent(const struct x86_i2c_client_info *client_info) +{ + struct i2c_adapter *adap = NULL; + struct device *pdev, *adap_dev; + + pdev = bus_find_device_by_name(&pci_bus_type, NULL, client_info->adapter_path); + if (!pdev) { + pr_err("Error could not find %s PCI device\n", client_info->adapter_path); + return NULL; + } + + adap_dev = bus_find_device(&i2c_bus_type, NULL, pdev, match_parent); + if (adap_dev) { + adap = i2c_verify_adapter(adap_dev); + if (!adap) + put_device(adap_dev); + } + + put_device(pdev); + + return adap; +} + static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info, int idx) { @@ -181,7 +212,11 @@ static __init int x86_instantiate_i2c_client(const struct x86_dev_info *dev_info if (board_info.irq < 0) return board_info.irq; - adap = get_i2c_adap_by_handle(client_info); + if (dev_info->use_pci_devname) + adap = get_i2c_adap_by_pci_parent(client_info); + else + adap = get_i2c_adap_by_handle(client_info); + if (!adap) { pr_err("error could not get %s adapter\n", client_info->adapter_path); return -ENODEV; diff --git a/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h b/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h index 5517e438c7b6..d26a4792eb0e 100644 --- a/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h +++ b/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h @@ -91,6 +91,7 @@ struct x86_dev_info { int gpio_button_count; int (*init)(struct device *dev); void (*exit)(void); + bool use_pci_devname; }; int x86_android_tablet_get_gpiod(const char *chip, int pin, const char *con_id, |