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Message-ID: <4658505.Inxl9yYzep@diego>
Date: Tue, 04 Aug 2015 10:53:15 +0200
From: Heiko Stübner <heiko@...ech.de>
To: Lin Huang <hl@...k-chips.com>
Cc: dianders@...omium.org, linux-rockchip@...ts.infradead.org,
linus.walleij@...aro.org, linux-gpio@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] pinctrl: rockchip: only enable gpio clock when it setting
Hi,
Am Dienstag, 4. August 2015, 14:41:27 schrieb Lin Huang:
> gpio can keep state even the clock disable, for save power
> consumption, only enable gpio clock when it setting
>
> Signed-off-by: Heiko Stuebner <heiko@...ech.de>
> Signed-off-by: Lin Huang <hl@...k-chips.com>
> ---
> Changes in v3:
> -match author and Signed-off-by name
I guess this patch has the same problem as Stephen pointed out for the clk-one
with the Signed-off-bys. As you did most of the development here, you should
probably simply remove my Signed-off-by.
You can add a
Reviewed-by: Heiko Stuebner <heiko@...ech.de>
instead. Two additional nits below.
>
> drivers/pinctrl/pinctrl-rockchip.c | 57
> +++++++++++++++++++++++++++++++++++--- 1 file changed, 53 insertions(+), 4
> deletions(-)
>
> diff --git a/drivers/pinctrl/pinctrl-rockchip.c
> b/drivers/pinctrl/pinctrl-rockchip.c index cc2843a..70a4539 100644
> --- a/drivers/pinctrl/pinctrl-rockchip.c
> +++ b/drivers/pinctrl/pinctrl-rockchip.c
> @@ -945,6 +945,7 @@ static int _rockchip_pmx_gpio_set_direction(struct
> gpio_chip *chip, if (ret < 0)
> return ret;
>
> + clk_enable(bank->clk);
> spin_lock_irqsave(&bank->slock, flags);
>
> data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
> @@ -953,9 +954,11 @@ static int _rockchip_pmx_gpio_set_direction(struct
> gpio_chip *chip, data |= BIT(pin);
> else
> data &= ~BIT(pin);
> +
unrelated new blank line
> writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
>
> spin_unlock_irqrestore(&bank->slock, flags);
> + clk_disable(bank->clk);
>
> return 0;
> }
> @@ -1389,6 +1392,7 @@ static void rockchip_gpio_set(struct gpio_chip *gc,
> unsigned offset, int value) unsigned long flags;
> u32 data;
>
> + clk_enable(bank->clk);
> spin_lock_irqsave(&bank->slock, flags);
>
> data = readl(reg);
> @@ -1398,6 +1402,7 @@ static void rockchip_gpio_set(struct gpio_chip *gc,
> unsigned offset, int value) writel(data, reg);
>
> spin_unlock_irqrestore(&bank->slock, flags);
> + clk_disable(bank->clk);
> }
>
> /*
> @@ -1409,7 +1414,9 @@ static int rockchip_gpio_get(struct gpio_chip *gc,
> unsigned offset) struct rockchip_pin_bank *bank = gc_to_pin_bank(gc);
> u32 data;
>
> + clk_enable(bank->clk);
> data = readl(bank->reg_base + GPIO_EXT_PORT);
> + clk_disable(bank->clk);
> data >>= offset;
> data &= 1;
> return data;
> @@ -1546,6 +1553,7 @@ static int rockchip_irq_set_type(struct irq_data *d,
> unsigned int type) if (ret < 0)
> return ret;
>
> + clk_enable(bank->clk);
> spin_lock_irqsave(&bank->slock, flags);
>
> data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
> @@ -1603,6 +1611,7 @@ static int rockchip_irq_set_type(struct irq_data *d,
> unsigned int type) default:
> irq_gc_unlock(gc);
> spin_unlock_irqrestore(&bank->slock, flags);
> + clk_disable(bank->clk);
> return -EINVAL;
> }
>
> @@ -1611,6 +1620,7 @@ static int rockchip_irq_set_type(struct irq_data *d,
> unsigned int type)
>
> irq_gc_unlock(gc);
> spin_unlock_irqrestore(&bank->slock, flags);
> + clk_disable(bank->clk);
>
> return 0;
> }
> @@ -1620,8 +1630,10 @@ static void rockchip_irq_suspend(struct irq_data *d)
> struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> struct rockchip_pin_bank *bank = gc->private;
>
> + clk_enable(bank->clk);
> bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
> irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
> + clk_disable(bank->clk);
> }
>
> static void rockchip_irq_resume(struct irq_data *d)
> @@ -1629,7 +1641,27 @@ static void rockchip_irq_resume(struct irq_data *d)
> struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> struct rockchip_pin_bank *bank = gc->private;
>
> + clk_enable(bank->clk);
> irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
> + clk_disable(bank->clk);
> +}
> +
> +static void rockchip_irq_gc_mask_clr_bit(struct irq_data *d)
> +{
> + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> + struct rockchip_pin_bank *bank = gc->private;
> +
> + clk_enable(bank->clk);
> + irq_gc_mask_clr_bit(d);
> +}
> +
> +void rockchip_irq_gc_mask_set_bit(struct irq_data *d)
> +{
> + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> + struct rockchip_pin_bank *bank = gc->private;
> +
> + irq_gc_mask_set_bit(d);
> + clk_disable(bank->clk);
> }
>
> static int rockchip_interrupts_register(struct platform_device *pdev,
> @@ -1640,7 +1672,7 @@ static int rockchip_interrupts_register(struct
> platform_device *pdev, unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE |
> IRQ_NOAUTOEN;
> struct irq_chip_generic *gc;
> int ret;
> - int i;
> + int i, j;
>
> for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
> if (!bank->valid) {
> @@ -1649,11 +1681,19 @@ static int rockchip_interrupts_register(struct
> platform_device *pdev, continue;
> }
>
> + ret = clk_enable(bank->clk);
> + if (ret) {
> + dev_err(&pdev->dev, "failed to enable clock for bank %s\n",
> + bank->name);
> + continue;
> + }
> +
> bank->domain = irq_domain_add_linear(bank->of_node, 32,
> &irq_generic_chip_ops, NULL);
> if (!bank->domain) {
> dev_warn(&pdev->dev, "could not initialize irq domain for bank
%s\n",
> bank->name);
> + clk_disable(bank->clk);
> continue;
> }
>
> @@ -1664,6 +1704,7 @@ static int rockchip_interrupts_register(struct
> platform_device *pdev, dev_err(&pdev->dev, "could not alloc generic chips
> for bank %s\n", bank->name);
> irq_domain_remove(bank->domain);
> + clk_disable(bank->clk);
> continue;
> }
>
> @@ -1681,8 +1722,9 @@ static int rockchip_interrupts_register(struct
> platform_device *pdev, gc->chip_types[0].regs.mask = GPIO_INTMASK;
> gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
> gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
> - gc->chip_types[0].chip.irq_mask = irq_gc_mask_set_bit;
> - gc->chip_types[0].chip.irq_unmask = irq_gc_mask_clr_bit;
> + gc->chip_types[0].chip.irq_mask = rockchip_irq_gc_mask_set_bit;
> + gc->chip_types[0].chip.irq_unmask =
> + rockchip_irq_gc_mask_clr_bit;
> gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
> gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend;
> gc->chip_types[0].chip.irq_resume = rockchip_irq_resume;
> @@ -1691,6 +1733,12 @@ static int rockchip_interrupts_register(struct
> platform_device *pdev,
>
> irq_set_chained_handler_and_data(bank->irq,
> rockchip_irq_demux, bank);
> +
> + /* map the gpio irqs here, when the clock is still running */
> + for (j = 0 ; j < 32 ; j++)
> + irq_create_mapping(bank->domain, j);
> +
> + clk_disable(bank->clk);
> }
>
> return 0;
> @@ -1808,7 +1856,7 @@ static int rockchip_get_bank_data(struct
> rockchip_pin_bank *bank, if (IS_ERR(bank->clk))
> return PTR_ERR(bank->clk);
>
> - return clk_prepare_enable(bank->clk);
> + return clk_prepare(bank->clk);
> }
>
> static const struct of_device_id rockchip_pinctrl_dt_match[];
> @@ -1927,6 +1975,7 @@ static int __maybe_unused
> rockchip_pinctrl_suspend(struct device *dev) static int __maybe_unused
> rockchip_pinctrl_resume(struct device *dev) {
> struct rockchip_pinctrl *info = dev_get_drvdata(dev);
> +
this new blank looks unrelated
> int ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
> rk3288_grf_gpio6c_iomux |
> GPIO6C6_SEL_WRITE_ENABLE);
--
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