i2c: nomadik: support Mobileye EyeQ6H I2C controller

Add EyeQ6H support to the nmk-i2c AMBA driver. It shares the same quirk
as EyeQ5: the memory bus only supports 32-bit accesses. Avoid writeb()
and readb() by reusing the same `priv->has_32b_bus` flag.

It does NOT need to write speed-mode specific value into a register;
therefore it does not depend on the mobileye,olb DT property.

Reviewed-by: Linus Walleij <[email protected]>
Signed-off-by: Théo Lebrun <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>

Author: tleb

drivers/i2c/busses/i2c-nomadik.c

@@ -6,10 +6,10 @@
  * I2C master mode controller driver, used in Nomadik 8815
  * and Ux500 platforms.
  *
- * The Mobileye EyeQ5 platform is also supported; it uses
+ * The Mobileye EyeQ5 and EyeQ6H platforms are also supported; they use
  * the same Ux500/DB8500 IP block with two quirks:
  *  - The memory bus only supports 32-bit accesses.
- *  - A register must be configured for the I2C speed mode;
+ *  - (only EyeQ5) A register must be configured for the I2C speed mode;
  *    it is located in a shared register region called OLB.
  *
  * Author: Srinidhi Kasagar <[email protected]>
@@ -1075,6 +1075,10 @@ static const struct of_device_id nmk_i2c_eyeq_match_table[] = {
 		.compatible = "mobileye,eyeq5-i2c",
 		.data = (void *)(NMK_I2C_EYEQ_FLAG_32B_BUS | NMK_I2C_EYEQ_FLAG_IS_EYEQ5),
 	},
+	{
+		.compatible = "mobileye,eyeq6h-i2c",
+		.data = (void *)NMK_I2C_EYEQ_FLAG_32B_BUS,
+	},
 };
 
 static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)