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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>
This commit is contained in:
Kamlakant Patel 2016-03-24 15:01:40 +05:30 committed by Linus Walleij
parent 16fe1ad289
commit dd98756d78
3 changed files with 24 additions and 6 deletions
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3
Documentation/devicetree/bindings/gpio/gpio-xlp.txt
View File

@ -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).

2
drivers/gpio/Kconfig
View File

@ -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

23
drivers/gpio/gpio-xlp.c
View File

@ -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);
/* 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 (irq_base < 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);