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| author | Simon Glass <sjg@chromium.org> | 2020-07-08 06:32:29 +0300 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-17 09:32:24 +0300 |
| commit | 4b0ec52b9ee52de7aabb05c6a8386c0b788d2271 (patch) | |
| tree | a69f5291c1f048cc7d7f3ff010186011ce3b4733 /drivers/i2c/designware_i2c.h | |
| parent | c61c8efd477c075b75b22ebd7b0e845a39a7d105 (diff) | |
| download | u-boot-4b0ec52b9ee52de7aabb05c6a8386c0b788d2271.tar.xz | |
i2c: designware_i2c: Support ACPI table generation
Update the PCI driver to generate ACPI information so that Linux has the
full information about each I2C bus.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
[bmeng: Correct one typo in dw_i2c_gen_speed_config() comments]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/i2c/designware_i2c.h')
| -rw-r--r-- | drivers/i2c/designware_i2c.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/i2c/designware_i2c.h b/drivers/i2c/designware_i2c.h index dc9a6ccb63..18acf4e841 100644 --- a/drivers/i2c/designware_i2c.h +++ b/drivers/i2c/designware_i2c.h @@ -205,6 +205,7 @@ struct dw_i2c { #if CONFIG_IS_ENABLED(CLK) struct clk clk; #endif + struct dw_i2c_speed_config config; }; extern const struct dm_i2c_ops designware_i2c_ops; @@ -213,4 +214,18 @@ int designware_i2c_probe(struct udevice *bus); int designware_i2c_remove(struct udevice *dev); int designware_i2c_ofdata_to_platdata(struct udevice *bus); +/** + * dw_i2c_gen_speed_config() - Calculate config info from requested speed + * + * Calculate the speed config from the given @speed_hz and return it so that + * it can be incorporated in ACPI tables + * + * @dev: I2C bus to check + * @speed_hz: Requested speed in Hz + * @config: Returns config to use for that speed + * @return 0 if OK, -ve on error + */ +int dw_i2c_gen_speed_config(const struct udevice *dev, int speed_hz, + struct dw_i2c_speed_config *config); + #endif /* __DW_I2C_H_ */ |