From: Prabhakar Kushwaha <prabhakar@freescale.com>
Date: Wed, 23 Jan 2013 17:59:37 +0000 (+0000)
Subject: board/common: Add support for QIXIS read/write using i2c
X-Git-Tag: v2013.04-rc1~138
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=960aa89bda0754cc1c4418c5d21e7ff23dc34a82;p=oweals%2Fu-boot.git

board/common: Add support for QIXIS read/write using i2c

QIXIS FPGA is accessable via both i2c and flash controller.
Only flash controller access is supported.

Add support of i2c based access. It is quite useful in the scenario
where either flash controller path is broken or not present.

Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
---

diff --git a/board/freescale/common/qixis.c b/board/freescale/common/qixis.c
index f7d2f4640c..2b74d0201e 100644
--- a/board/freescale/common/qixis.c
+++ b/board/freescale/common/qixis.c
@@ -15,8 +15,22 @@
 #include <command.h>
 #include <asm/io.h>
 #include <linux/time.h>
+#include <i2c.h>
 #include "qixis.h"
 
+#ifdef CONFIG_SYS_I2C_FPGA_ADDR
+u8 qixis_read_i2c(unsigned int reg)
+{
+	return i2c_reg_read(CONFIG_SYS_I2C_FPGA_ADDR, reg);
+}
+
+void qixis_write_i2c(unsigned int reg, u8 value)
+{
+	u8 val = value;
+	i2c_reg_write(CONFIG_SYS_I2C_FPGA_ADDR, reg, val);
+}
+#endif
+
 u8 qixis_read(unsigned int reg)
 {
 	void *p = (void *)QIXIS_BASE;
diff --git a/board/freescale/common/qixis.h b/board/freescale/common/qixis.h
index 2b8f607352..8d914d5485 100644
--- a/board/freescale/common/qixis.h
+++ b/board/freescale/common/qixis.h
@@ -92,8 +92,17 @@ u16 qixis_read_minor(void);
 char *qixis_read_time(char *result);
 char *qixis_read_tag(char *buf);
 const char *byte_to_binary_mask(u8 val, u8 mask, char *buf);
+#ifdef CONFIG_SYS_I2C_FPGA_ADDR
+u8 qixis_read_i2c(unsigned int reg);
+void qixis_write_i2c(unsigned int reg, u8 value);
+#endif
 
 #define QIXIS_READ(reg) qixis_read(offsetof(struct qixis, reg))
 #define QIXIS_WRITE(reg, value) qixis_write(offsetof(struct qixis, reg), value)
+#ifdef CONFIG_SYS_I2C_FPGA_ADDR
+#define QIXIS_READ_I2C(reg) qixis_read_i2c(offsetof(struct qixis, reg))
+#define QIXIS_WRITE_I2C(reg, value) \
+			qixis_write_i2c(offsetof(struct qixis, reg), value)
+#endif
 
 #endif