Hello Baruch,
On Sun, 3 Dec 2017 13:11:23 +0200
Baruch Siach <baruch@xxxxxxxxxx> wrote:
> The CP110 component is integrated in the Armada 8k and 7k lines of
> processors.
>
> This patch also adds an option of offset to the MSB of the control
> register. The existing DT binding for Armada 38x refers to a single
> 32 bit control register. It turns out that this is actually only the
> MSB of the control area. Changing the binding to fix that would break
> existing DT files, so the Armada 38x binding is left as is.
>
> The new CP110 binding increases the size of the control area to 64
> bits, thus moving the MSB to offset 4.
>
> Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx>
> ---
> v2: No change
> ---
> drivers/thermal/armada_thermal.c | 24 ++++++++++++++++++++++--
> 1 file changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/thermal/armada_thermal.c
> b/drivers/thermal/armada_thermal.c index 0eb82097571f..59b75f63945d
> 100644 --- a/drivers/thermal/armada_thermal.c
> +++ b/drivers/thermal/armada_thermal.c
> @@ -73,6 +73,7 @@ struct armada_thermal_data {
> unsigned int temp_shift;
> unsigned int temp_mask;
> unsigned int is_valid_shift;
> + unsigned int control_msb_offset;
> };
>
> static void armadaxp_init_sensor(struct platform_device *pdev,
> @@ -142,12 +143,14 @@ static void armada375_init_sensor(struct
> platform_device *pdev, static void armada380_init_sensor(struct
> platform_device *pdev, struct armada_thermal_priv *priv)
> {
> - unsigned long reg = readl_relaxed(priv->control);
> + void __iomem *control_msb =
> + priv->control + priv->data->control_msb_offset;
> + unsigned long reg = readl_relaxed(control_msb);
>
> /* Reset hardware once */
> if (!(reg & A380_HW_RESET)) {
> reg |= A380_HW_RESET;
> - writel(reg, priv->control);
> + writel(reg, control_msb);
> mdelay(10);
> }
> }
> @@ -266,6 +269,19 @@ static const struct armada_thermal_data
> armada_ap806_data = { .signed_sample = true,
> };
>
> +static const struct armada_thermal_data armada_cp110_data = {
> + .is_valid = armada_is_valid,
> + .init_sensor = armada380_init_sensor,
I see the initialization for CP110 thermal IP is close to
Armada-380's, but, as you point it in the commit log it is still
different.
I don't know what is the best way to handle this but until now each
new compatible had his own ->init_sensor function, shouldn't we do
the same here as changes are requested? This would naturally avoid the
situation with Armada-380 bindings.
Thanks,
Miquèl
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