[PATCH v2 4/7] gpio/rockchip: use struct rockchip_gpio_regs for gpio controller

From: Peter Geis
Date: Sun Apr 11 2021 - 09:31:06 EST

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From: Jianqun Xu <jay.xu@xxxxxxxxxxxxxx>

Store register offsets in the struct rockchip_gpio_regs, this patch
prepare for the driver update for new gpio controller.

Signed-off-by: Jianqun Xu <jay.xu@xxxxxxxxxxxxxx>
---
drivers/gpio/gpio-rockchip.c | 85 ++++++++++++++++--------------
drivers/pinctrl/pinctrl-rockchip.h | 38 +++++++++++++
2 files changed, 84 insertions(+), 39 deletions(-)

diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
index 03a3d251faae..b12db3a523d0 100644
--- a/drivers/gpio/gpio-rockchip.c
+++ b/drivers/gpio/gpio-rockchip.c
@@ -24,19 +24,21 @@
#include "../pinctrl/core.h"
#include "../pinctrl/pinctrl-rockchip.h"

-/* GPIO control registers */
-#define GPIO_SWPORT_DR 0x00
-#define GPIO_SWPORT_DDR 0x04
-#define GPIO_INTEN 0x30
-#define GPIO_INTMASK 0x34
-#define GPIO_INTTYPE_LEVEL 0x38
-#define GPIO_INT_POLARITY 0x3c
-#define GPIO_INT_STATUS 0x40
-#define GPIO_INT_RAWSTATUS 0x44
-#define GPIO_DEBOUNCE 0x48
-#define GPIO_PORTS_EOI 0x4c
-#define GPIO_EXT_PORT 0x50
-#define GPIO_LS_SYNC 0x60
+#define GPIO_TYPE_V1 (0) /* GPIO Version ID reserved */
+
+static const struct rockchip_gpio_regs gpio_regs_v1 = {
+ .port_dr = 0x00,
+ .port_ddr = 0x04,
+ .int_en = 0x30,
+ .int_mask = 0x34,
+ .int_type = 0x38,
+ .int_polarity = 0x3c,
+ .int_status = 0x40,
+ .int_rawstatus = 0x44,
+ .debounce = 0x48,
+ .port_eoi = 0x4c,
+ .ext_port = 0x50,
+};

static int rockchip_gpio_get_direction(struct gpio_chip *chip,
unsigned int offset)
@@ -51,7 +53,7 @@ static int rockchip_gpio_get_direction(struct gpio_chip *chip,
"failed to enable clock for bank %s\n", bank->name);
return ret;
}
- data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+ data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_ddr);
clk_disable(bank->clk);

if (data & BIT(offset))
@@ -70,13 +72,13 @@ static int rockchip_gpio_set_direction(struct gpio_chip *chip,
clk_enable(bank->clk);
raw_spin_lock_irqsave(&bank->slock, flags);

- data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+ data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_ddr);
/* set bit to 1 for output, 0 for input */
if (!input)
data |= BIT(offset);
else
data &= ~BIT(offset);
- writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
+ writel_relaxed(data, bank->reg_base + bank->gpio_regs->port_ddr);

raw_spin_unlock_irqrestore(&bank->slock, flags);
clk_disable(bank->clk);
@@ -88,7 +90,7 @@ static void rockchip_gpio_set(struct gpio_chip *gc, unsigned int offset,
int value)
{
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
- void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
+ void __iomem *reg = bank->reg_base + bank->gpio_regs->port_dr;
unsigned long flags;
u32 data;

@@ -111,7 +113,7 @@ static int rockchip_gpio_get(struct gpio_chip *gc, unsigned int offset)
u32 data;

clk_enable(bank->clk);
- data = readl(bank->reg_base + GPIO_EXT_PORT);
+ data = readl(bank->reg_base + bank->gpio_regs->ext_port);
clk_disable(bank->clk);
data >>= offset;
data &= 1;
@@ -122,7 +124,7 @@ static void rockchip_gpio_set_debounce(struct gpio_chip *gc,
unsigned int offset, bool enable)
{
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
- void __iomem *reg = bank->reg_base + GPIO_DEBOUNCE;
+ void __iomem *reg = bank->reg_base + bank->gpio_regs->debounce;
unsigned long flags;
u32 data;

@@ -226,7 +228,7 @@ static void rockchip_irq_demux(struct irq_desc *desc)

chained_irq_enter(chip, desc);

- pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
+ pend = readl_relaxed(bank->reg_base + bank->gpio_regs->int_status);

while (pend) {
unsigned int irq, virq;
@@ -250,24 +252,26 @@ static void rockchip_irq_demux(struct irq_desc *desc)
u32 data, data_old, polarity;
unsigned long flags;

- data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
+ data = readl_relaxed(bank->reg_base +
+ bank->gpio_regs->ext_port);
do {
raw_spin_lock_irqsave(&bank->slock, flags);

polarity = readl_relaxed(bank->reg_base +
- GPIO_INT_POLARITY);
+ bank->gpio_regs->int_polarity);
if (data & BIT(irq))
polarity &= ~BIT(irq);
else
polarity |= BIT(irq);
writel(polarity,
- bank->reg_base + GPIO_INT_POLARITY);
+ bank->reg_base +
+ bank->gpio_regs->int_polarity);

raw_spin_unlock_irqrestore(&bank->slock, flags);

data_old = data;
data = readl_relaxed(bank->reg_base +
- GPIO_EXT_PORT);
+ bank->gpio_regs->ext_port);
} while ((data & BIT(irq)) != (data_old & BIT(irq)));
}

@@ -290,9 +294,9 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
clk_enable(bank->clk);
raw_spin_lock_irqsave(&bank->slock, flags);

- data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
+ data = readl_relaxed(bank->reg_base + bank->gpio_regs->port_ddr);
data &= ~mask;
- writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
+ writel_relaxed(data, bank->reg_base + bank->gpio_regs->port_ddr);

raw_spin_unlock_irqrestore(&bank->slock, flags);

@@ -304,8 +308,8 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
raw_spin_lock_irqsave(&bank->slock, flags);
irq_gc_lock(gc);

- level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
- polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
+ level = readl_relaxed(gc->reg_base + bank->gpio_regs->int_type);
+ polarity = readl_relaxed(gc->reg_base + bank->gpio_regs->int_polarity);

switch (type) {
case IRQ_TYPE_EDGE_BOTH:
@@ -316,7 +320,7 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
* Determine gpio state. If 1 next interrupt should be falling
* otherwise rising.
*/
- data = readl(bank->reg_base + GPIO_EXT_PORT);
+ data = readl(bank->reg_base + bank->gpio_regs->ext_port);
if (data & mask)
polarity &= ~mask;
else
@@ -349,8 +353,8 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
return -EINVAL;
}

- writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
- writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
+ writel_relaxed(level, gc->reg_base + bank->gpio_regs->int_type);
+ writel_relaxed(polarity, gc->reg_base + bank->gpio_regs->int_polarity);

irq_gc_unlock(gc);
raw_spin_unlock_irqrestore(&bank->slock, flags);
@@ -365,8 +369,8 @@ static void rockchip_irq_suspend(struct irq_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);
+ 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);
}

@@ -376,7 +380,7 @@ static void rockchip_irq_resume(struct irq_data *d)
struct rockchip_pin_bank *bank = gc->private;

clk_enable(bank->clk);
- irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
+ irq_reg_writel(gc, bank->saved_masks, bank->gpio_regs->int_mask);
clk_disable(bank->clk);
}

@@ -435,8 +439,8 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
gc = irq_get_domain_generic_chip(bank->domain, 0);
gc->reg_base = bank->reg_base;
gc->private = bank;
- gc->chip_types[0].regs.mask = GPIO_INTMASK;
- gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
+ gc->chip_types[0].regs.mask = bank->gpio_regs->int_mask;
+ gc->chip_types[0].regs.ack = bank->gpio_regs->port_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;
@@ -453,9 +457,9 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
* Our driver only uses the concept of masked and always keeps
* things enabled, so for us that's all masked and all enabled.
*/
- writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK);
- writel_relaxed(0xffffffff, bank->reg_base + GPIO_PORTS_EOI);
- writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN);
+ writel_relaxed(0xffffffff, bank->reg_base + bank->gpio_regs->int_mask);
+ writel_relaxed(0xffffffff, bank->reg_base + bank->gpio_regs->port_eoi);
+ writel_relaxed(0xffffffff, bank->reg_base + bank->gpio_regs->int_en);
gc->mask_cache = 0xffffffff;

irq_set_chained_handler_and_data(bank->irq,
@@ -546,6 +550,9 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)

bank->irq = irq_of_parse_and_map(bank->of_node, 0);

+ bank->gpio_regs = &gpio_regs_v1;
+ bank->gpio_type = GPIO_TYPE_V1;
+
bank->clk = of_clk_get(bank->of_node, 0);
if (!IS_ERR(bank->clk))
return clk_prepare(bank->clk);
diff --git a/drivers/pinctrl/pinctrl-rockchip.h b/drivers/pinctrl/pinctrl-rockchip.h
index 4aa3d2f1fa67..1b774b6bbc3e 100644
--- a/drivers/pinctrl/pinctrl-rockchip.h
+++ b/drivers/pinctrl/pinctrl-rockchip.h
@@ -32,6 +32,42 @@ enum rockchip_pinctrl_type {
RK3568,
};

+/**
+ * struct rockchip_gpio_regs
+ * @port_dr: data register
+ * @port_ddr: data direction register
+ * @int_en: interrupt enable
+ * @int_mask: interrupt mask
+ * @int_type: interrupt trigger type, such as high, low, edge trriger type.
+ * @int_polarity: interrupt polarity enable register
+ * @int_bothedge: interrupt bothedge enable register
+ * @int_status: interrupt status register
+ * @int_rawstatus: int_status = int_rawstatus & int_mask
+ * @debounce: enable debounce for interrupt signal
+ * @dbclk_div_en: enable divider for debounce clock
+ * @dbclk_div_con: setting for divider of debounce clock
+ * @port_eoi: end of interrupt of the port
+ * @ext_port: port data from external
+ * @version_id: controller version register
+ */
+struct rockchip_gpio_regs {
+ u32 port_dr;
+ u32 port_ddr;
+ u32 int_en;
+ u32 int_mask;
+ u32 int_type;
+ u32 int_polarity;
+ u32 int_bothedge;
+ u32 int_status;
+ u32 int_rawstatus;
+ u32 debounce;
+ u32 dbclk_div_en;
+ u32 dbclk_div_con;
+ u32 port_eoi;
+ u32 ext_port;
+ u32 version_id;
+};
+
/**
* struct rockchip_iomux
* @type: iomux variant using IOMUX_* constants
@@ -126,6 +162,8 @@ struct rockchip_pin_bank {
struct gpio_chip gpio_chip;
struct pinctrl_gpio_range grange;
raw_spinlock_t slock;
+ const struct rockchip_gpio_regs *gpio_regs;
+ u32 gpio_type;
u32 toggle_edge_mode;
u32 recalced_mask;
u32 route_mask;
--
2.25.1

Next message: Peter Geis: "[PATCH v2 3/7] gpio: separate gpio driver from pinctrl-rockchip driver"
Previous message: Peter Geis: "[PATCH v2 0/7] gpio-rockchip driver"
In reply to: Peter Geis: "[PATCH v2 1/7] pinctrl/rockchip: separate struct rockchip_pin_bank to a head file"
Next in thread: Peter Geis: "[PATCH v2 3/7] gpio: separate gpio driver from pinctrl-rockchip driver"
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