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Message-Id: <20230921015247.23478-3-zhuyinbo@loongson.cn>
Date: Thu, 21 Sep 2023 09:52:47 +0800
From: Yinbo Zhu <zhuyinbo@...ngson.cn>
To: Linus Walleij <linus.walleij@...aro.org>,
Bartosz Golaszewski <brgl@...ev.pl>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>, linux-gpio@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Jianmin Lv <lvjianmin@...ngson.cn>, wanghongliang@...ngson.cn,
loongson-kernel@...ts.loongnix.cn, Yinbo Zhu <zhuyinbo@...ngson.cn>
Subject: [PATCH v6 2/2] 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: Yinbo Zhu <zhuyinbo@...ngson.cn>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
---
drivers/gpio/gpio-loongson-64bit.c | 119 ++++++++++++++++++++++++++---
1 file changed, 110 insertions(+), 9 deletions(-)
diff --git a/drivers/gpio/gpio-loongson-64bit.c b/drivers/gpio/gpio-loongson-64bit.c
index 06213bbfabdd..6749d4dd6d64 100644
--- a/drivers/gpio/gpio-loongson-64bit.c
+++ b/drivers/gpio/gpio-loongson-64bit.c
@@ -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);
--
2.20.1
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