gpio: xlp: Add GPIO driver support for Broadcom Vulcan ARM64

- Add GPIO support for Broadcom Vulcan ARM64.
- Add depends on ARCH_VULCAN to Kconfig to enable gpio controller
  driver for Broadcom Vulcan ARM64 SoCs.

Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/Documentation/devicetree/bindings/gpio/gpio-xlp.txt b/Documentation/devicetree/bindings/gpio/gpio-xlp.txt
index 262ee4d..28662d8 100644 (file)
--- a/Documentation/devicetree/bindings/gpio/gpio-xlp.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-xlp.txt
@@ -3,6 +3,8 @@ Netlogic XLP Family GPIO
 
 This GPIO driver is used for following Netlogic XLP SoCs:
        XLP832, XLP316, XLP208, XLP980, XLP532
+This GPIO driver is also compatible with GPIO controller found on
+Broadcom Vulcan ARM64.
 
 Required properties:
 -------------------
@@ -13,6 +15,7 @@ Required properties:
   - "netlogic,xlp208-gpio": For Netlogic XLP208
   - "netlogic,xlp980-gpio": For Netlogic XLP980
   - "netlogic,xlp532-gpio": For Netlogic XLP532
+  - "brcm,vulcan-gpio": For Broadcom Vulcan ARM64
 - reg: Physical base address and length of the controller's registers.
 - #gpio-cells: Should be two. The first cell is the pin number and the second
   cell is used to specify optional parameters (currently unused).

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 6d6015f..7889836 100644 (file)
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -474,7 +474,7 @@ config GPIO_XILINX
 
 config GPIO_XLP
        tristate "Netlogic XLP GPIO support"
-       depends on CPU_XLP && OF_GPIO
+       depends on OF_GPIO && (CPU_XLP || ARCH_VULCAN || COMPILE_TEST)
        select GPIOLIB_IRQCHIP
        help
          This driver provides support for GPIO interface on Netlogic XLP MIPS64

diff --git a/drivers/gpio/gpio-xlp.c b/drivers/gpio/gpio-xlp.c
index aa5813d..08897dc 100644 (file)
--- a/drivers/gpio/gpio-xlp.c
+++ b/drivers/gpio/gpio-xlp.c
@@ -85,7 +85,8 @@ enum {
        XLP_GPIO_VARIANT_XLP316,
        XLP_GPIO_VARIANT_XLP208,
        XLP_GPIO_VARIANT_XLP980,
-       XLP_GPIO_VARIANT_XLP532
+       XLP_GPIO_VARIANT_XLP532,
+       GPIO_VARIANT_VULCAN
 };
 
 struct xlp_gpio_priv {
@@ -285,6 +286,10 @@ static const struct of_device_id xlp_gpio_of_ids[] = {
                .compatible = "netlogic,xlp532-gpio",
                .data       = (void *)XLP_GPIO_VARIANT_XLP532,
        },
+       {
+               .compatible = "brcm,vulcan-gpio",
+               .data       = (void *)GPIO_VARIANT_VULCAN,
+       },
        { /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, xlp_gpio_of_ids);
@@ -347,6 +352,7 @@ static int xlp_gpio_probe(struct platform_device *pdev)
                break;
        case XLP_GPIO_VARIANT_XLP980:
        case XLP_GPIO_VARIANT_XLP532:
+       case GPIO_VARIANT_VULCAN:
                priv->gpio_out_en = gpio_base + GPIO_9XX_OUTPUT_EN;
                priv->gpio_paddrv = gpio_base + GPIO_9XX_PADDRV;
                priv->gpio_intr_stat = gpio_base + GPIO_9XX_INT_STAT;
@@ -354,7 +360,12 @@ static int xlp_gpio_probe(struct platform_device *pdev)
                priv->gpio_intr_pol = gpio_base + GPIO_9XX_INT_POL;
                priv->gpio_intr_en = gpio_base + GPIO_9XX_INT_EN00;
 
-               ngpio = (soc_type == XLP_GPIO_VARIANT_XLP980) ? 66 : 67;
+               if (soc_type == XLP_GPIO_VARIANT_XLP980)
+                       ngpio = 66;
+               else if (soc_type == XLP_GPIO_VARIANT_XLP532)
+                       ngpio = 67;
+               else
+                       ngpio = 70;
                break;
        default:
                dev_err(&pdev->dev, "Unknown Processor type!\n");
@@ -377,10 +388,14 @@ static int xlp_gpio_probe(struct platform_device *pdev)
        gc->get = xlp_gpio_get;
 
        spin_lock_init(&priv->lock);
-       irq_base = irq_alloc_descs(-1, XLP_GPIO_IRQ_BASE, gc->ngpio, 0);
-       if (irq_base < 0) {
+       /* XLP has fixed IRQ range for GPIO interrupts */
+       if (soc_type == GPIO_VARIANT_VULCAN)
+               irq_base = irq_alloc_descs(-1, 0, gc->ngpio, 0);
+       else
+               irq_base = irq_alloc_descs(-1, XLP_GPIO_IRQ_BASE, gc->ngpio, 0);
+       if (IS_ERR_VALUE(irq_base)) {
                dev_err(&pdev->dev, "Failed to allocate IRQ numbers\n");
-               return -ENODEV;
+               return irq_base;
        }
 
        err = gpiochip_add_data(gc, priv);