On Tue, Oct 08, 2024 at 12:29:41PM +0200, Théo Lebrun wrote:
> 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.
>
> Refactoring is done using is_eyeq5 and is_eyeq6h boolean local
> variables. Sort variables in reverse christmas tree to try and
> introduce some logic into the ordering.
>
> Signed-off-by: Théo Lebrun <theo.lebrun@xxxxxxxxxxx>
> ---
> drivers/i2c/busses/i2c-nomadik.c | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
> index ad0f02acdb1215a1c04729f97bb14a4d93f88456..ea511d3a58073eaedb63850026e05b59427a69c6 100644
> --- a/drivers/i2c/busses/i2c-nomadik.c
> +++ b/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 <srinidhi.kasagar@xxxxxxxxxxxxxx>
> @@ -1046,8 +1046,6 @@ static int nmk_i2c_eyeq5_probe(struct nmk_i2c_dev *priv)
> struct regmap *olb;
> unsigned int id;
>
> - priv->has_32b_bus = true;
> -
> olb = syscon_regmap_lookup_by_phandle_args(np, "mobileye,olb", 1, &id);
> if (IS_ERR(olb))
> return PTR_ERR(olb);
> @@ -1070,13 +1068,15 @@ static int nmk_i2c_eyeq5_probe(struct nmk_i2c_dev *priv)
>
> static int nmk_i2c_probe(struct amba_device *adev, const struct amba_id *id)
> {
> - int ret = 0;
> - struct nmk_i2c_dev *priv;
> - struct device_node *np = adev->dev.of_node;
> - struct device *dev = &adev->dev;
> - struct i2c_adapter *adap;
> struct i2c_vendor_data *vendor = id->data;
> + struct device_node *np = adev->dev.of_node;
> + bool is_eyeq6h = of_device_is_compatible(np, "mobileye,eyeq6h-i2c");
> + bool is_eyeq5 = of_device_is_compatible(np, "mobileye,eyeq5-i2c");
You should use match data, not add compatibles in the middle of code.
That's preferred, scallable pattern. What you added here last time does
not scale and above change is a proof for that.
Best regards,
Krzysztof
