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authorTimur Tabi <timur@freescale.com>2008-12-03 11:28:30 -0600
committerWolfgang Denk <wd@denx.de>2008-12-15 23:46:21 +0100
commitecf5f077c8e77454f532eaac3e3afb7cfc48c62d (patch)
tree31ff670aa674bc9e44c6dd4baeea0ad5a4855fe5 /include/i2c.h
parente39cd81c44740d7355d277ed3d38536cbe1e003d (diff)
i2c: merge all i2c_reg_read() and i2c_reg_write() into inline functions
All implementations of the functions i2c_reg_read() and i2c_reg_write() are identical. We can save space and simplify the code by converting these functions into inlines and putting them in i2c.h. Signed-off-by: Timur Tabi <timur@freescale.com> Acked-By: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'include/i2c.h')
-rw-r--r--include/i2c.h62
1 files changed, 60 insertions, 2 deletions
diff --git a/include/i2c.h b/include/i2c.h
index 8d6f867422c..fad2d571616 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -76,6 +76,20 @@
# define I2C_SOFT_DECLARATIONS
# endif
#endif
+
+#ifdef CONFIG_8xx
+/* Set default values for the I2C bus speed and slave address on 8xx. In the
+ * future, we'll define these in all 8xx board config files.
+ */
+#ifndef CONFIG_SYS_I2C_SPEED
+#define CONFIG_SYS_I2C_SPEED 50000
+#endif
+
+#ifndef CONFIG_SYS_I2C_SLAVE
+#define CONFIG_SYS_I2C_SLAVE 0xFE
+#endif
+#endif
+
/*
* Initialization, must be called once on start up, may be called
* repeatedly to change the speed and slave addresses.
@@ -132,8 +146,52 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len);
/*
* Utility routines to read/write registers.
*/
-uchar i2c_reg_read (uchar chip, uchar reg);
-void i2c_reg_write(uchar chip, uchar reg, uchar val);
+static inline u8 i2c_reg_read(u8 addr, u8 reg)
+{
+ u8 buf;
+
+#ifdef CONFIG_8xx
+ /* MPC8xx needs this. Maybe one day we can get rid of it. */
+ i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#endif
+
+#ifdef DEBUG
+ printf("%s: addr=0x%02x, reg=0x%02x\n", __func__, addr, reg);
+#endif
+
+#ifdef CONFIG_BLACKFIN
+ /* This ifdef will become unneccessary in a future version of the
+ * blackfin I2C driver.
+ */
+ i2c_read(addr, reg, 0, &buf, 1);
+#else
+ i2c_read(addr, reg, 1, &buf, 1);
+#endif
+
+ return buf;
+}
+
+static inline void i2c_reg_write(u8 addr, u8 reg, u8 val)
+{
+#ifdef CONFIG_8xx
+ /* MPC8xx needs this. Maybe one day we can get rid of it. */
+ i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#endif
+
+#ifdef DEBUG
+ printf("%s: addr=0x%02x, reg=0x%02x, val=0x%02x\n",
+ __func__, addr, reg, val);
+#endif
+
+#ifdef CONFIG_BLACKFIN
+ /* This ifdef will become unneccessary in a future version of the
+ * blackfin I2C driver.
+ */
+ i2c_write(addr, reg, 0, &val, 1);
+#else
+ i2c_write(addr, reg, 1, &val, 1);
+#endif
+}
/*
* Functions for setting the current I2C bus and its speed