linux-kernel - Re: [PATCH V3] gpio: pmic-eic-sprd: Configure the bit corresponding to the EIC through offset

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Wed, 3 Jan 2024 10:05:01 +0800
From: Chunyan Zhang <zhang.lyra@...il.com>
To: Wenhua Lin <Wenhua.Lin@...soc.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Andy Shevchenko <andy@...nel.org>, 
	Bartosz Golaszewski <brgl@...ev.pl>, Orson Zhai <orsonzhai@...il.com>, 
	Baolin Wang <baolin.wang@...ux.alibaba.com>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org, wenhua lin <wenhua.lin1994@...il.com>, 
	Xiongpeng Wu <xiongpeng.wu@...soc.com>
Subject: Re: [PATCH V3] gpio: pmic-eic-sprd: Configure the bit corresponding
 to the EIC through offset

On Tue, 2 Jan 2024 at 16:29, Wenhua Lin <Wenhua.Lin@...soc.com> wrote:
>
> A bank PMIC EIC contains 16 EICs, and the operating registers
> are BIT0-BIT15, such as BIT0 of the register operated by EIC0.
> Using the one-dimensional array reg[CACHE_NR_REGS] for maintenance
> will cause the configuration of other EICs to be affected when
> operating a certain EIC. In order to solve this problem, configure
> the bit corresponding to the EIC through offset.
>
> Signed-off-by: Wenhua Lin <Wenhua.Lin@...soc.com>

Reviewed-by: Chunyan Zhang <zhang.lyra@...il.com>


> ---
> Change in V3:
> -Change title.
> -Change commit message.
> -Delete the modification of the two-dimensional array maintenance pmic eic,
>  and add the corresponding bits to configure the eic according to the offset.
> ---
> ---
>  drivers/gpio/gpio-pmic-eic-sprd.c | 19 ++++++++++---------
>  1 file changed, 10 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpio/gpio-pmic-eic-sprd.c b/drivers/gpio/gpio-pmic-eic-sprd.c
> index 01c0fd0a9d8c..d9b228bea42e 100644
> --- a/drivers/gpio/gpio-pmic-eic-sprd.c
> +++ b/drivers/gpio/gpio-pmic-eic-sprd.c
> @@ -151,8 +151,8 @@ static void sprd_pmic_eic_irq_mask(struct irq_data *data)
>         struct sprd_pmic_eic *pmic_eic = gpiochip_get_data(chip);
>         u32 offset = irqd_to_hwirq(data);
>
> -       pmic_eic->reg[REG_IE] = 0;
> -       pmic_eic->reg[REG_TRIG] = 0;
> +       pmic_eic->reg[REG_IE] &= ~BIT(offset);
> +       pmic_eic->reg[REG_TRIG] &= ~BIT(offset);
>
>         gpiochip_disable_irq(chip, offset);
>  }
> @@ -165,8 +165,8 @@ static void sprd_pmic_eic_irq_unmask(struct irq_data *data)
>
>         gpiochip_enable_irq(chip, offset);
>
> -       pmic_eic->reg[REG_IE] = 1;
> -       pmic_eic->reg[REG_TRIG] = 1;
> +       pmic_eic->reg[REG_IE] |= BIT(offset);
> +       pmic_eic->reg[REG_TRIG] |= BIT(offset);
>  }
>
>  static int sprd_pmic_eic_irq_set_type(struct irq_data *data,
> @@ -174,13 +174,14 @@ static int sprd_pmic_eic_irq_set_type(struct irq_data *data,
>  {
>         struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
>         struct sprd_pmic_eic *pmic_eic = gpiochip_get_data(chip);
> +       u32 offset = irqd_to_hwirq(data);
>
>         switch (flow_type) {
>         case IRQ_TYPE_LEVEL_HIGH:
> -               pmic_eic->reg[REG_IEV] = 1;
> +               pmic_eic->reg[REG_IEV] |= BIT(offset);
>                 break;
>         case IRQ_TYPE_LEVEL_LOW:
> -               pmic_eic->reg[REG_IEV] = 0;
> +               pmic_eic->reg[REG_IEV] &= ~BIT(offset);
>                 break;
>         case IRQ_TYPE_EDGE_RISING:
>         case IRQ_TYPE_EDGE_FALLING:
> @@ -222,15 +223,15 @@ static void sprd_pmic_eic_bus_sync_unlock(struct irq_data *data)
>                         sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV, 1);
>         } else {
>                 sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV,
> -                                    pmic_eic->reg[REG_IEV]);
> +                                    !!(pmic_eic->reg[REG_IEV] & BIT(offset)));
>         }
>
>         /* Set irq unmask */
>         sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IE,
> -                            pmic_eic->reg[REG_IE]);
> +                            !!(pmic_eic->reg[REG_IE] & BIT(offset)));
>         /* Generate trigger start pulse for debounce EIC */
>         sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_TRIG,
> -                            pmic_eic->reg[REG_TRIG]);
> +                            !!(pmic_eic->reg[REG_TRIG] & BIT(offset)));
>
>         mutex_unlock(&pmic_eic->buslock);
>  }
> --
> 2.17.1
>