[PATCH 1/2] ARM: imx6: gw54xx: add function to retrieve board revision from GSC

[Lucas Stach]

This parses the board revision from the GSC EEPROm model string.

Signed-off-by: Lucas Stach <dev at lynxeye.de>
---
 arch/arm/boards/gateworks-ventana/gsc.c | 14 ++++++++++++++
 arch/arm/boards/gateworks-ventana/gsc.h |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/arch/arm/boards/gateworks-ventana/gsc.c b/arch/arm/boards/gateworks-ventana/gsc.c
index 3614230..92244d1 100644
--- a/arch/arm/boards/gateworks-ventana/gsc.c
+++ b/arch/arm/boards/gateworks-ventana/gsc.c
@@ -65,3 +65,17 @@ int gsc_i2c_write(struct i2c_client *client, u32 addr, const u8 *buf, u16 count)
 
 	return ret;
 }
+
+char gsc_get_rev(struct i2c_client *client)
+{
+	int i;
+	u8 model[16];
+
+	gsc_i2c_read(client, 0x30, model, 16);
+	for (i = sizeof(model) - 1; i > 0; i--) {
+		if (model[i] >= 'A')
+			return model[i];
+	}
+
+	return 'A';
+}
diff --git a/arch/arm/boards/gateworks-ventana/gsc.h b/arch/arm/boards/gateworks-ventana/gsc.h
index a6e7e22..13f2262 100644
--- a/arch/arm/boards/gateworks-ventana/gsc.h
+++ b/arch/arm/boards/gateworks-ventana/gsc.h
@@ -56,3 +56,5 @@
  */
 int gsc_i2c_read(struct i2c_client *client, u32 addr, u8 *buf, u16 count);
 int gsc_i2c_write(struct i2c_client *client, u32 addr, const u8 *buf, u16 count);
+
+char gsc_get_rev(struct i2c_client *client);
-- 
2.9.4