diff options
| author | Simon Glass <sjg@chromium.org> | 2020-09-22 21:45:01 +0300 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-09-25 06:27:15 +0300 |
| commit | fd42f263cef9fd6bba9ded76a82d4ac66450e156 (patch) | |
| tree | 64bc139fe69c2d50a6200ccda1f1c521e45643b4 /include/i2c.h | |
| parent | bddbaf5edf0e01817f2577295c3d682e4d5fed09 (diff) | |
| download | u-boot-fd42f263cef9fd6bba9ded76a82d4ac66450e156.tar.xz | |
i2c: Add a generic driver to generate ACPI info
Many I2C devices produce roughly the same ACPI data with just things like
the GPIO/interrupt information being different.
This can be handled by a generic driver along with some information in the
device tree.
Add a generic i2c driver for this purpose.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Diffstat (limited to 'include/i2c.h')
| -rw-r--r-- | include/i2c.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/i2c.h b/include/i2c.h index 1d792db454..880aa8032b 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -58,6 +58,12 @@ enum i2c_address_mode { I2C_MODE_10_BIT }; +/** enum i2c_device_t - Types of I2C devices, used for compatible strings */ +enum i2c_device_t { + I2C_DEVICE_GENERIC, + I2C_DEVICE_HID_OVER_I2C, +}; + struct udevice; /** * struct dm_i2c_chip - information about an i2c chip @@ -558,6 +564,23 @@ int i2c_emul_find(struct udevice *dev, struct udevice **emulp); */ struct udevice *i2c_emul_get_device(struct udevice *emul); +/* ACPI operations for generic I2C devices */ +extern struct acpi_ops i2c_acpi_ops; + +/** + * acpi_i2c_ofdata_to_platdata() - Read properties intended for ACPI + * + * This reads the generic I2C properties from the device tree, so that these + * can be used to create ACPI information for the device. + * + * See the i2c/generic-acpi.txt binding file for information about the + * properties. + * + * @dev: I2C device to process + * @return 0 if OK, -EINVAL if acpi,hid is not present + */ +int acpi_i2c_ofdata_to_platdata(struct udevice *dev); + #ifndef CONFIG_DM_I2C /* |