linux-kernel - Re: [PATCH V5 2/3] pinctrl: qcom: Use qcom_scm_io_update

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Message-ID: <z2isxt5zqaawkfgfdgogkimsutlvem7weoaatulhq2tcqt44rk@em4fvztj3eox>
Date:   Fri, 21 Jul 2023 20:09:54 -0700
From:   Bjorn Andersson <andersson@...nel.org>
To:     Kathiravan T <quic_kathirav@...cinc.com>
Cc:     Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Elliot Berman <quic_eberman@...cinc.com>,
        Mukesh Ojha <quic_mojha@...cinc.com>,
        Kalle Valo <kvalo@...nel.org>,
        Loic Poulain <loic.poulain@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, quic_srichara@...cinc.com,
        quic_sjaganat@...cinc.com, quic_anusha@...cinc.com,
        quic_saahtoma@...cinc.com
Subject: Re: [PATCH V5 2/3] pinctrl: qcom: Use qcom_scm_io_update_field()

On Thu, Jul 20, 2023 at 12:34:07PM +0530, Kathiravan T wrote:
> From: Mukesh Ojha <quic_mojha@...cinc.com>
> 
> Use qcom_scm_io_update_field() function introduced in the commit
> 1f899e6997bb ("firmware: qcom_scm: provide a read-modify-write function").
> 
> Acked-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Mukesh Ojha <quic_mojha@...cinc.com>
> Signed-off-by: Kathiravan T <quic_kathirav@...cinc.com>
> ---
> Changes in V5:
> 	- Dropped the ununecessary paranthesis
> 	- Updated the commit message to indicate the commit ID in which
> 	  qcom_scm_io_update_field is introduced instead of simply
> 	  mentioning the "last commit"
> 
>  drivers/pinctrl/qcom/pinctrl-msm.c | 12 +++++-------
>  1 file changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
> index 2585ef2b2793..5ecde5bea38b 100644
> --- a/drivers/pinctrl/qcom/pinctrl-msm.c
> +++ b/drivers/pinctrl/qcom/pinctrl-msm.c
> @@ -1040,6 +1040,7 @@ static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int type)
>  	const struct msm_pingroup *g;
>  	unsigned long flags;
>  	bool was_enabled;
> +	u32 mask;
>  	u32 val;
>  
>  	if (msm_gpio_needs_dual_edge_parent_workaround(d, type)) {
> @@ -1074,23 +1075,20 @@ static int msm_gpio_irq_set_type(struct irq_data *d, unsigned int type)
>  	 * With intr_target_use_scm interrupts are routed to
>  	 * application cpu using scm calls.
>  	 */
> +	mask = GENMASK(2, 0) << g->intr_target_bit;
>  	if (pctrl->intr_target_use_scm) {
>  		u32 addr = pctrl->phys_base[0] + g->intr_target_reg;
>  		int ret;
>  
> -		qcom_scm_io_readl(addr, &val);
> -
> -		val &= ~(7 << g->intr_target_bit);
> -		val |= g->intr_target_kpss_val << g->intr_target_bit;
> -
> -		ret = qcom_scm_io_writel(addr, val);
> +		val = g->intr_target_kpss_val << g->intr_target_bit;
> +		ret = qcom_scm_io_update_field(addr, mask, val);

Be aware when you resubmit that this code has changed. So please base
your changes on linux-next.

Regards,
Bjorn