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Message-Id: <20210510063722.506009-1-jay.xu@rock-chips.com>
Date: Mon, 10 May 2021 14:37:22 +0800
From: Jianqun Xu <jay.xu@...k-chips.com>
To: heiko@...ech.de, linus.walleij@...aro.org, robh+dt@...nel.org
Cc: linux-gpio@...r.kernel.org, linux-rockchip@...ts.infradead.org,
linux-kernel@...r.kernel.org, Jianqun Xu <jay.xu@...k-chips.com>
Subject: [PATCH 6/7] gpio/rockchip: always enable clock for gpio controller
Since gate and ungate pclk of gpio has very litte benifit for system
power consumption, just keep it always ungate.
Signed-off-by: Jianqun Xu <jay.xu@...k-chips.com>
---
drivers/gpio/gpio-rockchip.c | 68 +++++-------------------------------
1 file changed, 9 insertions(+), 59 deletions(-)
diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index 92aaf1848449..048e7eecddba 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -139,17 +139,8 @@ static int rockchip_gpio_get_direction(struct gpio_chip *chip,
{
struct rockchip_pin_bank *bank = gpiochip_get_data(chip);
u32 data;
- int ret;
- ret = clk_enable(bank->clk);
- if (ret < 0) {
- dev_err(bank->drvdata->dev,
- "failed to enable clock for bank %s\n", bank->name);
- return ret;
- }
data = rockchip_gpio_readl_bit(bank, offset, bank->gpio_regs->port_ddr);
- clk_disable(bank->clk);
-
if (data & BIT(offset))
return GPIO_LINE_DIRECTION_OUT;
@@ -163,11 +154,9 @@ static int rockchip_gpio_set_direction(struct gpio_chip *chip,
unsigned long flags;
u32 data = input ? 0 : 1;
- clk_enable(bank->clk);
raw_spin_lock_irqsave(&bank->slock, flags);
rockchip_gpio_writel_bit(bank, offset, data, bank->gpio_regs->port_ddr);
raw_spin_unlock_irqrestore(&bank->slock, flags);
- clk_disable(bank->clk);
return 0;
}
@@ -178,11 +167,9 @@ static void rockchip_gpio_set(struct gpio_chip *gc, unsigned int offset,
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
unsigned long flags;
- clk_enable(bank->clk);
raw_spin_lock_irqsave(&bank->slock, flags);
rockchip_gpio_writel_bit(bank, offset, value, bank->gpio_regs->port_dr);
raw_spin_unlock_irqrestore(&bank->slock, flags);
- clk_disable(bank->clk);
}
static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset)
@@ -190,11 +177,10 @@ static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset)
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
u32 data;
- clk_enable(bank->clk);
data = readl(bank->reg_base + bank->gpio_regs->ext_port);
- clk_disable(bank->clk);
data >>= offset;
data &= 1;
+
return data;
}
@@ -315,9 +301,7 @@ static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
if (!bank->domain)
return -ENXIO;
- clk_enable(bank->clk);
virq = irq_create_mapping(bank->domain, offset);
- clk_disable(bank->clk);
return (virq) ? : -ENXIO;
}
@@ -409,7 +393,6 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
unsigned long flags;
int ret = 0;
- clk_enable(bank->clk);
raw_spin_lock_irqsave(&bank->slock, flags);
rockchip_gpio_writel_bit(bank, d->hwirq, 0,
@@ -480,7 +463,6 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
out:
irq_gc_unlock(gc);
raw_spin_unlock_irqrestore(&bank->slock, flags);
- clk_disable(bank->clk);
return ret;
}
@@ -490,10 +472,8 @@ 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, bank->gpio_regs->int_mask);
irq_reg_writel(gc, ~gc->wake_active, bank->gpio_regs->int_mask);
- clk_disable(bank->clk);
}
static void rockchip_irq_resume(struct irq_data *d)
@@ -501,27 +481,7 @@ 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, bank->gpio_regs->int_mask);
- clk_disable(bank->clk);
-}
-
-static void rockchip_irq_enable(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);
-}
-
-static void rockchip_irq_disable(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 rockchip_pin_bank *bank)
@@ -530,19 +490,11 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
struct irq_chip_generic *gc;
int ret;
- ret = clk_enable(bank->clk);
- if (ret) {
- dev_err(bank->dev, "failed to enable clock for bank %s\n",
- bank->name);
- return -EINVAL;
- }
-
bank->domain = irq_domain_add_linear(bank->of_node, 32,
&irq_generic_chip_ops, NULL);
if (!bank->domain) {
dev_warn(bank->dev, "could not init irq domain for bank %s\n",
bank->name);
- clk_disable(bank->clk);
return -EINVAL;
}
@@ -554,7 +506,6 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
dev_err(bank->dev, "could not alloc generic chips for bank %s\n",
bank->name);
irq_domain_remove(bank->domain);
- clk_disable(bank->clk);
return -EINVAL;
}
@@ -571,8 +522,8 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
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_enable = rockchip_irq_enable;
- gc->chip_types[0].chip.irq_disable = rockchip_irq_disable;
+ gc->chip_types[0].chip.irq_enable = irq_gc_mask_clr_bit;
+ gc->chip_types[0].chip.irq_disable = irq_gc_mask_set_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;
@@ -591,7 +542,6 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
irq_set_chained_handler_and_data(bank->irq,
rockchip_irq_demux, bank);
- clk_disable(bank->clk);
return 0;
}
@@ -695,7 +645,6 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
if (IS_ERR(bank->db_clk)) {
dev_err(bank->dev, "cannot find debounce clk\n");
bank->db_clk = NULL;
- clk_disable(bank->clk);
return -EINVAL;
}
} else {
@@ -703,7 +652,6 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
bank->gpio_type = GPIO_TYPE_V1;
}
- clk_disable(bank->clk);
return 0;
}
@@ -756,15 +704,17 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
return ret;
ret = rockchip_gpiolib_register(bank);
- if (ret) {
- clk_disable_unprepare(bank->clk);
- return ret;
- }
+ if (ret)
+ goto err_clk;
platform_set_drvdata(pdev, bank);
dev_info(dev, "probed %pOF\n", np);
return 0;
+err_clk:
+ clk_disable_unprepare(bank->clk);
+
+ return ret;
}
static int rockchip_gpio_remove(struct platform_device *pdev)
--
2.25.1
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