gpio: Add Tunnel Creek support to sch_gpio
Almost the same driver for both Poulsbo and Tunnel Creek.
The difference is in quantity of GPIOs powered by the core power
rail and by suspend power supply, default values for some GPIOs, etc.
Detect actual hardware by platform device ID assigned in lpc_sch
and set configuration accordingly.
Signed-off-by: Denis Turischev <denis@compulab.co.il>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/gpio/sch_gpio.c b/drivers/gpio/sch_gpio.c
index 5835213..5606042 100644
--- a/drivers/gpio/sch_gpio.c
+++ b/drivers/gpio/sch_gpio.c
@@ -25,6 +25,7 @@
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
+#include <linux/pci_ids.h>
#include <linux/gpio.h>
@@ -187,7 +188,11 @@
static int __devinit sch_gpio_probe(struct platform_device *pdev)
{
struct resource *res;
- int err;
+ int err, id;
+
+ id = pdev->id;
+ if (!id)
+ return -ENODEV;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!res)
@@ -198,12 +203,40 @@
gpio_ba = res->start;
- sch_gpio_core.base = 0;
- sch_gpio_core.ngpio = 10;
- sch_gpio_core.dev = &pdev->dev;
+ switch (id) {
+ case PCI_DEVICE_ID_INTEL_SCH_LPC:
+ sch_gpio_core.base = 0;
+ sch_gpio_core.ngpio = 10;
- sch_gpio_resume.base = 10;
- sch_gpio_resume.ngpio = 4;
+ sch_gpio_resume.base = 10;
+ sch_gpio_resume.ngpio = 4;
+
+ /*
+ * GPIO[6:0] enabled by default
+ * GPIO7 is configured by the CMC as SLPIOVR
+ * Enable GPIO[9:8] core powered gpios explicitly
+ */
+ outb(0x3, gpio_ba + CGEN + 1);
+ /*
+ * SUS_GPIO[2:0] enabled by default
+ * Enable SUS_GPIO3 resume powered gpio explicitly
+ */
+ outb(0x8, gpio_ba + RGEN);
+ break;
+
+ case PCI_DEVICE_ID_INTEL_ITC_LPC:
+ sch_gpio_core.base = 0;
+ sch_gpio_core.ngpio = 5;
+
+ sch_gpio_resume.base = 5;
+ sch_gpio_resume.ngpio = 9;
+ break;
+
+ default:
+ return -ENODEV;
+ }
+
+ sch_gpio_core.dev = &pdev->dev;
sch_gpio_resume.dev = &pdev->dev;
err = gpiochip_add(&sch_gpio_core);
@@ -214,18 +247,6 @@
if (err < 0)
goto err_sch_gpio_resume;
- /*
- * GPIO[6:0] enabled by default
- * GPIO7 is configured by the CMC as SLPIOVR
- * Enable GPIO[9:8] core powered gpios explicitly
- */
- outb(0x3, gpio_ba + CGEN + 1);
- /*
- * SUS_GPIO[2:0] enabled by default
- * Enable SUS_GPIO3 resume powered gpio explicitly
- */
- outb(0x8, gpio_ba + RGEN);
-
return 0;
err_sch_gpio_resume: