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authorKamlakant Patel <kamlakant.patel@broadcom.com>2016-03-24 15:01:40 +0530
committerLinus Walleij <linus.walleij@linaro.org>2016-03-31 10:44:08 +0200
commitdd98756d78153dbb43685f0f0e618dda235aee00 (patch)
tree844d2f29936ca3c6230179a17c682ab5e8c18780
parent16fe1ad289019d78a8f8fdb65f08d298ee921cb3 (diff)
downloadop-kernel-dev-dd98756d78153dbb43685f0f0e618dda235aee00.zip
op-kernel-dev-dd98756d78153dbb43685f0f0e618dda235aee00.tar.gz
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>
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-xlp.txt3
-rw-r--r--drivers/gpio/Kconfig2
-rw-r--r--drivers/gpio/gpio-xlp.c25
3 files changed, 24 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-xlp.txt b/Documentation/devicetree/bindings/gpio/gpio-xlp.txt
index 262ee4d..28662d8 100644
--- 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
--- 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
--- 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);
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