From: Bin Meng <bmeng.cn@gmail.com>
Date: Mon, 1 Feb 2016 09:40:45 +0000 (-0800)
Subject: dm: pch: Add get_io_base op
X-Git-Tag: v2016.03-rc2~118
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=79d4eb627cffbc3ab7cefdd623fa39fefaaedbe7;p=oweals%2Fu-boot.git

dm: pch: Add get_io_base op

On some newer chipset (eg: BayTrail), there is an IO base address
register on the PCH device which configures the base address of a
memory-mapped I/O controller.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
---

diff --git a/drivers/pch/pch-uclass.c b/drivers/pch/pch-uclass.c
index 48a3965a76..7216660a24 100644
--- a/drivers/pch/pch-uclass.c
+++ b/drivers/pch/pch-uclass.c
@@ -44,6 +44,17 @@ int pch_get_gpio_base(struct udevice *dev, u32 *gbasep)
 	return ops->get_gpio_base(dev, gbasep);
 }
 
+int pch_get_io_base(struct udevice *dev, u32 *iobasep)
+{
+	struct pch_ops *ops = pch_get_ops(dev);
+
+	*iobasep = 0;
+	if (!ops->get_io_base)
+		return -ENOSYS;
+
+	return ops->get_io_base(dev, iobasep);
+}
+
 static int pch_uclass_post_bind(struct udevice *bus)
 {
 	/*
diff --git a/include/pch.h b/include/pch.h
index b378865c67..222e9081c3 100644
--- a/include/pch.h
+++ b/include/pch.h
@@ -41,6 +41,15 @@ struct pch_ops {
 	 * @return 0 if OK, -ve on error (e.g. there is no GPIO base)
 	 */
 	int (*get_gpio_base)(struct udevice *dev, u32 *gbasep);
+
+	/**
+	 * get_io_base() - get the address of IO base
+	 *
+	 * @dev:	PCH device to check
+	 * @iobasep:	Returns address of IO base if available, else 0
+	 * @return 0 if OK, -ve on error (e.g. there is no IO base)
+	 */
+	int (*get_io_base)(struct udevice *dev, u32 *iobasep);
 };
 
 #define pch_get_ops(dev)        ((struct pch_ops *)(dev)->driver->ops)
@@ -73,4 +82,13 @@ int pch_set_spi_protect(struct udevice *dev, bool protect);
  */
 int pch_get_gpio_base(struct udevice *dev, u32 *gbasep);
 
+/**
+ * pch_get_io_base() - get the address of IO base
+ *
+ * @dev:	PCH device to check
+ * @iobasep:	Returns address of IO base if available, else 0
+ * @return 0 if OK, -ve on error (e.g. there is no IO base)
+ */
+int pch_get_io_base(struct udevice *dev, u32 *iobasep);
+
 #endif