From 1f9eb59d273983ba8c65368120285ac6425476f7 Mon Sep 17 00:00:00 2001
From: Bin Meng <bmeng.cn@gmail.com>
Date: Mon, 1 Feb 2016 01:40:37 -0800
Subject: spi: ich: Use compatible strings to distinguish controller version

At present ich spi driver gets the controller version information via
pch, but this can be simply retrieved via spi node's compatible string.

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

diff --git a/arch/x86/dts/bayleybay.dts b/arch/x86/dts/bayleybay.dts
index fbca467..cdd5121 100644
--- a/arch/x86/dts/bayleybay.dts
+++ b/arch/x86/dts/bayleybay.dts
@@ -187,7 +187,7 @@
 			spi: spi {
 				#address-cells = <1>;
 				#size-cells = <0>;
-				compatible = "intel,ich-spi";
+				compatible = "intel,ich9-spi";
 				spi-flash@0 {
 					#address-cells = <1>;
 					#size-cells = <1>;
diff --git a/arch/x86/dts/broadwell_som-6896.dts b/arch/x86/dts/broadwell_som-6896.dts
index 7b2c515..4bb0a34 100644
--- a/arch/x86/dts/broadwell_som-6896.dts
+++ b/arch/x86/dts/broadwell_som-6896.dts
@@ -37,7 +37,7 @@
 			spi: spi {
 				#address-cells = <1>;
 				#size-cells = <0>;
-				compatible = "intel,ich-spi";
+				compatible = "intel,ich9-spi";
 				spi-flash@0 {
 					reg = <0>;
 					compatible = "winbond,w25q128", "spi-flash";
diff --git a/arch/x86/dts/chromebook_link.dts b/arch/x86/dts/chromebook_link.dts
index 5807203..e5d77b6 100644
--- a/arch/x86/dts/chromebook_link.dts
+++ b/arch/x86/dts/chromebook_link.dts
@@ -255,7 +255,7 @@
 			spi: spi {
 				#address-cells = <1>;
 				#size-cells = <0>;
-				compatible = "intel,ich-spi";
+				compatible = "intel,ich9-spi";
 				spi-flash@0 {
 					#size-cells = <1>;
 					#address-cells = <1>;
diff --git a/arch/x86/dts/chromebox_panther.dts b/arch/x86/dts/chromebox_panther.dts
index 48f0c77..ce8825f 100644
--- a/arch/x86/dts/chromebox_panther.dts
+++ b/arch/x86/dts/chromebox_panther.dts
@@ -59,7 +59,7 @@
 			spi: spi {
 				#address-cells = <1>;
 				#size-cells = <0>;
-				compatible = "intel,ich-spi";
+				compatible = "intel,ich9-spi";
 				spi-flash@0 {
 					#size-cells = <1>;
 					#address-cells = <1>;
diff --git a/arch/x86/dts/crownbay.dts b/arch/x86/dts/crownbay.dts
index 47fab0f..ee8302c 100644
--- a/arch/x86/dts/crownbay.dts
+++ b/arch/x86/dts/crownbay.dts
@@ -230,7 +230,7 @@
 			spi: spi {
 				#address-cells = <1>;
 				#size-cells = <0>;
-				compatible = "intel,ich-spi";
+				compatible = "intel,ich7-spi";
 				spi-flash@0 {
 					reg = <0>;
 					compatible = "sst,25vf016b",
diff --git a/arch/x86/dts/galileo.dts b/arch/x86/dts/galileo.dts
index dd75fc4..a9b2994 100644
--- a/arch/x86/dts/galileo.dts
+++ b/arch/x86/dts/galileo.dts
@@ -118,7 +118,7 @@
 			spi: spi {
 				#address-cells = <1>;
 				#size-cells = <0>;
-				compatible = "intel,ich-spi";
+				compatible = "intel,ich7-spi";
 				spi-flash@0 {
 					#size-cells = <1>;
 					#address-cells = <1>;
diff --git a/arch/x86/dts/minnowmax.dts b/arch/x86/dts/minnowmax.dts
index 7afdf6c..5b4da6c 100644
--- a/arch/x86/dts/minnowmax.dts
+++ b/arch/x86/dts/minnowmax.dts
@@ -221,7 +221,7 @@
 			spi: spi {
 				#address-cells = <1>;
 				#size-cells = <0>;
-				compatible = "intel,ich-spi";
+				compatible = "intel,ich9-spi";
 				spi-flash@0 {
 					#address-cells = <1>;
 					#size-cells = <1>;
diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
index 22b5419..b863539 100644
--- a/drivers/spi/ich.c
+++ b/drivers/spi/ich.c
@@ -18,6 +18,8 @@
 
 #include "ich.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 #ifdef DEBUG_TRACE
 #define debug_trace(fmt, args...) debug(fmt, ##args)
 #else
@@ -594,9 +596,6 @@ static int ich_spi_probe(struct udevice *dev)
 	uint8_t bios_cntl;
 	int ret;
 
-	/* Check the ICH version */
-	plat->ich_version = pch_get_version(dev->parent);
-
 	ret = ich_init_controller(dev, plat, priv);
 	if (ret)
 		return ret;
@@ -658,6 +657,25 @@ static int ich_spi_child_pre_probe(struct udevice *dev)
 	return 0;
 }
 
+static int ich_spi_ofdata_to_platdata(struct udevice *dev)
+{
+	struct ich_spi_platdata *plat = dev_get_platdata(dev);
+	int ret;
+
+	ret = fdt_node_check_compatible(gd->fdt_blob, dev->of_offset,
+					"intel,ich7-spi");
+	if (ret == 0) {
+		plat->ich_version = PCHV_7;
+	} else {
+		ret = fdt_node_check_compatible(gd->fdt_blob, dev->of_offset,
+						"intel,ich9-spi");
+		if (ret == 0)
+			plat->ich_version = PCHV_9;
+	}
+
+	return ret;
+}
+
 static const struct dm_spi_ops ich_spi_ops = {
 	.xfer		= ich_spi_xfer,
 	.set_speed	= ich_spi_set_speed,
@@ -669,7 +687,8 @@ static const struct dm_spi_ops ich_spi_ops = {
 };
 
 static const struct udevice_id ich_spi_ids[] = {
-	{ .compatible = "intel,ich-spi" },
+	{ .compatible = "intel,ich7-spi" },
+	{ .compatible = "intel,ich9-spi" },
 	{ }
 };
 
@@ -678,6 +697,7 @@ U_BOOT_DRIVER(ich_spi) = {
 	.id	= UCLASS_SPI,
 	.of_match = ich_spi_ids,
 	.ops	= &ich_spi_ops,
+	.ofdata_to_platdata = ich_spi_ofdata_to_platdata,
 	.platdata_auto_alloc_size = sizeof(struct ich_spi_platdata),
 	.priv_auto_alloc_size = sizeof(struct ich_spi_priv),
 	.child_pre_probe = ich_spi_child_pre_probe,
-- 
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