linux-kernel - Re: [PATCH v4 1/2] irqchip/qcom-pdc: Add support for v3.2 HW

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Message-ID: <e3af689b-5e37-49f6-84b0-ea8649d1943d@linaro.org>
Date:   Wed, 6 Sep 2023 18:55:58 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Neil Armstrong <neil.armstrong@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>
Cc:     "Maulik Shah (mkshah)" <quic_mkshah@...cinc.com>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH v4 1/2] irqchip/qcom-pdc: Add support for v3.2 HW

On 5.09.2023 15:19, Neil Armstrong wrote:
> Starting from HW version 3.2 the IRQ_ENABLE bit has moved to the
> IRQ_i_CFG register and requires a change of the driver to avoid
> writing into an undefined register address.
> 
> Get the HW version from registers and set the IRQ_ENABLE bit to the
> correct register depending on the HW version.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Reviewed-by: Maulik Shah <quic_mkshah@...cinc.com>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
> ---
[...]

> +	if (pdc_version < PDC_VERSION_3_2) {
> +		u32 index, mask;
> +
> +		index = pin_out / 32;
> +		mask = pin_out % 32;
I get that you're moving around existing code, but would that
not be equal to FIELD_GET() with GENMASK(31, 5) and GENMASK(4, 0)?
Perhaps it'd be clearer to read. But don't worry about it in this
series.

Otherwise:

Acked-by: Konrad Dybcio <konrad.dybcio@...aro.org>

Konrad