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| author | Simon Glass <sjg@chromium.org> | 2020-07-07 21:32:29 -0600 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2020-07-17 14:32:24 +0800 |
| commit | 4b0ec52b9ee52de7aabb05c6a8386c0b788d2271 (patch) | |
| tree | a69f5291c1f048cc7d7f3ff010186011ce3b4733 /drivers/i2c/designware_i2c.c | |
| parent | c61c8efd477c075b75b22ebd7b0e845a39a7d105 (diff) | |
| download | u-boot-4b0ec52b9ee52de7aabb05c6a8386c0b788d2271.zip u-boot-4b0ec52b9ee52de7aabb05c6a8386c0b788d2271.tar.gz u-boot-4b0ec52b9ee52de7aabb05c6a8386c0b788d2271.tar.bz2 | |
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.c')
| -rw-r--r-- | drivers/i2c/designware_i2c.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/i2c/designware_i2c.c b/drivers/i2c/designware_i2c.c index 44a1f33..cf892c6 100644 --- a/drivers/i2c/designware_i2c.c +++ b/drivers/i2c/designware_i2c.c @@ -333,6 +333,32 @@ static int _dw_i2c_set_bus_speed(struct dw_i2c *priv, struct i2c_regs *i2c_base, /* Restore back i2c now speed set */ if (ena == IC_ENABLE_0B) dw_i2c_enable(i2c_base, true); + if (priv) + priv->config = config; + + return 0; +} + +int dw_i2c_gen_speed_config(const struct udevice *dev, int speed_hz, + struct dw_i2c_speed_config *config) +{ + struct dw_i2c *priv = dev_get_priv(dev); + ulong rate; + int ret; + +#if CONFIG_IS_ENABLED(CLK) + rate = clk_get_rate(&priv->clk); + if (IS_ERR_VALUE(rate)) + return log_msg_ret("clk", -EINVAL); +#else + rate = IC_CLK; +#endif + + ret = calc_bus_speed(priv, priv->regs, speed_hz, rate, config); + if (ret) + printf("%s: ret=%d\n", __func__, ret); + if (ret) + return log_msg_ret("calc_bus_speed", ret); return 0; } |