Commit 3feb70a6 authored by Yinbo Zhu's avatar Yinbo Zhu Committed by Bartosz Golaszewski
Browse files

gpio: loongson: add more gpio chip support 



This patch was to add loongson 2k0500, 2k2000 and 3a5000 gpio chip
driver support and define inten_offset attibute to enable gpio chip
interrupt.

Signed-off-by: default avatarYinbo Zhu <zhuyinbo@loongson.cn>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent 1b83a90b

drivers/gpio/gpio-loongson-64bit.c

+110 −9
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ struct loongson_gpio_chip_data { 
	unsigned int		conf_offset;

	unsigned int		out_offset;

	unsigned int		in_offset;

	unsigned int		inten_offset;

};



struct loongson_gpio_chip {
@@ -117,19 +118,29 @@ static void loongson_gpio_set(struct gpio_chip *chip, unsigned int pin, int valu 


static int loongson_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)

{

	unsigned int u;

	struct platform_device *pdev = to_platform_device(chip->parent);

	struct loongson_gpio_chip *lgpio = to_loongson_gpio_chip(chip);



	if (lgpio->chip_data->mode == BIT_CTRL_MODE) {

		/* Get the register index from offset then multiply by bytes per register */

		u = readl(lgpio->reg_base + lgpio->chip_data->inten_offset + (offset / 32) * 4);

		u |= BIT(offset % 32);

		writel(u, lgpio->reg_base + lgpio->chip_data->inten_offset + (offset / 32) * 4);

	} else {

		writeb(1, lgpio->reg_base + lgpio->chip_data->inten_offset + offset);

	}



	return platform_get_irq(pdev, offset);

}



static int loongson_gpio_init(struct device *dev, struct loongson_gpio_chip *lgpio,

			      struct device_node *np, void __iomem *reg_base)

			      void __iomem *reg_base)

{

	int ret;

	u32 ngpios;



	lgpio->reg_base = reg_base;



	if (lgpio->chip_data->mode == BIT_CTRL_MODE) {

		ret = bgpio_init(&lgpio->chip, dev, 8,

				lgpio->reg_base + lgpio->chip_data->in_offset,
@@ -148,14 +159,14 @@ static int loongson_gpio_init(struct device *dev, struct loongson_gpio_chip *lgp 
		lgpio->chip.direction_output = loongson_gpio_direction_output;

		lgpio->chip.set = loongson_gpio_set;

		lgpio->chip.parent = dev;

		device_property_read_u32(dev, "ngpios", &ngpios);

		lgpio->chip.ngpio = ngpios;

		spin_lock_init(&lgpio->lock);

	}



	device_property_read_u32(dev, "ngpios", &ngpios);



	lgpio->chip.can_sleep = 0;

	lgpio->chip.ngpio = ngpios;

	lgpio->chip.label = lgpio->chip_data->label;

	lgpio->chip.can_sleep = false;

	if (lgpio->chip_data->inten_offset)

		lgpio->chip.to_irq = loongson_gpio_to_irq;



	return devm_gpiochip_add_data(dev, &lgpio->chip, lgpio);
@@ -165,7 +176,6 @@ static int loongson_gpio_probe(struct platform_device *pdev) 
{

	void __iomem *reg_base;

	struct loongson_gpio_chip *lgpio;

	struct device_node *np = pdev->dev.of_node;

	struct device *dev = &pdev->dev;



	lgpio = devm_kzalloc(dev, sizeof(*lgpio), GFP_KERNEL);
@@ -178,7 +188,7 @@ static int loongson_gpio_probe(struct platform_device *pdev) 
	if (IS_ERR(reg_base))

		return PTR_ERR(reg_base);



	return loongson_gpio_init(dev, lgpio, np, reg_base);

	return loongson_gpio_init(dev, lgpio, reg_base);

}



static const struct loongson_gpio_chip_data loongson_gpio_ls2k_data = {
@@ -187,6 +197,57 @@ static const struct loongson_gpio_chip_data loongson_gpio_ls2k_data = { 
	.conf_offset = 0x0,

	.in_offset = 0x20,

	.out_offset = 0x10,

	.inten_offset = 0x30,

};



static const struct loongson_gpio_chip_data loongson_gpio_ls2k0500_data0 = {

	.label = "ls2k0500_gpio",

	.mode = BIT_CTRL_MODE,

	.conf_offset = 0x0,

	.in_offset = 0x8,

	.out_offset = 0x10,

	.inten_offset = 0xb0,

};



static const struct loongson_gpio_chip_data loongson_gpio_ls2k0500_data1 = {

	.label = "ls2k0500_gpio",

	.mode = BIT_CTRL_MODE,

	.conf_offset = 0x0,

	.in_offset = 0x8,

	.out_offset = 0x10,

	.inten_offset = 0x98,

};



static const struct loongson_gpio_chip_data loongson_gpio_ls2k2000_data0 = {

	.label = "ls2k2000_gpio",

	.mode = BIT_CTRL_MODE,

	.conf_offset = 0x0,

	.in_offset = 0xc,

	.out_offset = 0x8,

};



static const struct loongson_gpio_chip_data loongson_gpio_ls2k2000_data1 = {

	.label = "ls2k2000_gpio",

	.mode = BIT_CTRL_MODE,

	.conf_offset = 0x0,

	.in_offset = 0x20,

	.out_offset = 0x10,

};



static const struct loongson_gpio_chip_data loongson_gpio_ls2k2000_data2 = {

	.label = "ls2k2000_gpio",

	.mode = BIT_CTRL_MODE,

	.conf_offset = 0x84,

	.in_offset = 0x88,

	.out_offset = 0x80,

};



static const struct loongson_gpio_chip_data loongson_gpio_ls3a5000_data = {

	.label = "ls3a5000_gpio",

	.mode = BIT_CTRL_MODE,

	.conf_offset = 0x0,

	.in_offset = 0xc,

	.out_offset = 0x8,

};



static const struct loongson_gpio_chip_data loongson_gpio_ls7a_data = {
@@ -202,6 +263,30 @@ static const struct of_device_id loongson_gpio_of_match[] = { 
		.compatible = "loongson,ls2k-gpio",

		.data = &loongson_gpio_ls2k_data,

	},

	{

		.compatible = "loongson,ls2k0500-gpio0",

		.data = &loongson_gpio_ls2k0500_data0,

	},

	{

		.compatible = "loongson,ls2k0500-gpio1",

		.data = &loongson_gpio_ls2k0500_data1,

	},

	{

		.compatible = "loongson,ls2k2000-gpio0",

		.data = &loongson_gpio_ls2k2000_data0,

	},

	{

		.compatible = "loongson,ls2k2000-gpio1",

		.data = &loongson_gpio_ls2k2000_data1,

	},

	{

		.compatible = "loongson,ls2k2000-gpio2",

		.data = &loongson_gpio_ls2k2000_data2,

	},

	{

		.compatible = "loongson,ls3a5000-gpio",

		.data = &loongson_gpio_ls3a5000_data,

	},

	{

		.compatible = "loongson,ls7a-gpio",

		.data = &loongson_gpio_ls7a_data,
@@ -215,6 +300,22 @@ static const struct acpi_device_id loongson_gpio_acpi_match[] = { 
		.id = "LOON0002",

		.driver_data = (kernel_ulong_t)&loongson_gpio_ls7a_data,

	},

	{

		.id = "LOON0007",

		.driver_data = (kernel_ulong_t)&loongson_gpio_ls3a5000_data,

	},

	{

		.id = "LOON000A",

		.driver_data = (kernel_ulong_t)&loongson_gpio_ls2k2000_data0,

	},

	{

		.id = "LOON000B",

		.driver_data = (kernel_ulong_t)&loongson_gpio_ls2k2000_data1,

	},

	{

		.id = "LOON000C",

		.driver_data = (kernel_ulong_t)&loongson_gpio_ls2k2000_data2,

	},

	{}

};

MODULE_DEVICE_TABLE(acpi, loongson_gpio_acpi_match);