i2c: meson: add configurable divider factors
This patch add support for I2C controller in Meson-AXG SoC,
Due to the IP changes between I2C controller, we need to introduce
a compatible data to make the divider factor configurable.
backport from linux:
931b18e92cd0 ("2c: meson: add configurable divider factors")
Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/i2c/meson_i2c.c b/drivers/i2c/meson_i2c.c
index 7d06d95..ee59bac 100644
--- a/drivers/i2c/meson_i2c.c
+++ b/drivers/i2c/meson_i2c.c
@@ -41,7 +41,12 @@
u32 tok_rdata1;
};
+struct meson_i2c_data {
+ unsigned char div_factor;
+};
+
struct meson_i2c {
+ const struct meson_i2c_data *data;
struct clk clk;
struct i2c_regs *regs;
struct i2c_msg *msg; /* Current I2C message */
@@ -229,7 +234,7 @@
if (IS_ERR_VALUE(clk_rate))
return -EINVAL;
- div = DIV_ROUND_UP(clk_rate, speed * 4);
+ div = DIV_ROUND_UP(clk_rate, speed * i2c->data->div_factor);
/* clock divider has 12 bits */
if (div >= (1 << 12)) {
@@ -253,6 +258,8 @@
struct meson_i2c *i2c = dev_get_priv(bus);
int ret;
+ i2c->data = (const struct meson_i2c_data *)dev_get_driver_data(bus);
+
ret = clk_get_by_index(bus, 0, &i2c->clk);
if (ret < 0)
return ret;
@@ -272,11 +279,24 @@
.set_bus_speed = meson_i2c_set_bus_speed,
};
+static const struct meson_i2c_data i2c_meson6_data = {
+ .div_factor = 4,
+};
+
+static const struct meson_i2c_data i2c_gxbb_data = {
+ .div_factor = 4,
+};
+
+static const struct meson_i2c_data i2c_axg_data = {
+ .div_factor = 3,
+};
+
static const struct udevice_id meson_i2c_ids[] = {
- { .compatible = "amlogic,meson6-i2c" },
- { .compatible = "amlogic,meson-gx-i2c" },
- { .compatible = "amlogic,meson-gxbb-i2c" },
- { }
+ {.compatible = "amlogic,meson6-i2c", .data = (ulong)&i2c_meson6_data},
+ {.compatible = "amlogic,meson-gx-i2c", .data = (ulong)&i2c_gxbb_data},
+ {.compatible = "amlogic,meson-gxbb-i2c", .data = (ulong)&i2c_gxbb_data},
+ {.compatible = "amlogic,meson-axg-i2c", .data = (ulong)&i2c_axg_data},
+ {}
};
U_BOOT_DRIVER(i2c_meson) = {