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gpio: loongson: add more gpio chip support

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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: Yinbo Zhu <zhuyinbo@loongson.cn>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Yinbo Zhu 2023-09-21 09:52:47 +08:00 committed by Bartosz Golaszewski
parent 1b83a90bd1
commit 3feb70a617
1 changed files with 110 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

119
drivers/gpio/gpio-loongson-64bit.c
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@ -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,
@ -148,15 +159,15 @@ 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.to_irq = loongson_gpio_to_irq;
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);