drivers/i2c/omap24xx_i2c.c: move all local variables to SRAM

[oweals/u-boot.git] / drivers / i2c / omap24xx_i2c.c

diff --git a/drivers/i2c/omap24xx_i2c.c b/drivers/i2c/omap24xx_i2c.c
index 4ae237aa8e74314f6344df6d4a28428cf5589030..a7ffd95d5d7f4d19d82a5041d88774e66f21ce1a 100644 (file)
--- a/drivers/i2c/omap24xx_i2c.c
+++ b/drivers/i2c/omap24xx_i2c.c
@@ -35,10 +35,15 @@ static void wait_for_bb(void);
 static u16 wait_for_pin(void);
 static void flush_fifo(void);
 
-static struct i2c *i2c_base = (struct i2c *)I2C_DEFAULT_BASE;
-
-static unsigned int bus_initialized[I2C_BUS_MAX];
-static unsigned int current_bus;
+/*
+ * For SPL boot some boards need i2c before SDRAM is initialised so force
+ * variables to live in SRAM
+ */
+static struct i2c __attribute__((section (".data"))) *i2c_base =
+                                       (struct i2c *)I2C_DEFAULT_BASE;
+static unsigned int __attribute__((section (".data"))) bus_initialized[I2C_BUS_MAX] =
+                                       { [0 ... (I2C_BUS_MAX-1)] = 0 };
+static unsigned int __attribute__((section (".data"))) current_bus = 0;
 
 void i2c_init(int speed, int slaveadd)
 {
@@ -73,7 +78,7 @@ void i2c_init(int speed, int slaveadd)
                fssclh -= I2C_HIGHSPEED_PHASE_ONE_SCLH_TRIM;
                if (((fsscll < 0) || (fssclh < 0)) ||
                    ((fsscll > 255) || (fssclh > 255))) {
-                       printf("Error : I2C initializing first phase clock\n");
+                       puts("Error : I2C initializing first phase clock\n");
                        return;
                }
 
@@ -84,7 +89,7 @@ void i2c_init(int speed, int slaveadd)
                hssclh -= I2C_HIGHSPEED_PHASE_TWO_SCLH_TRIM;
                if (((fsscll < 0) || (fssclh < 0)) ||
                    ((fsscll > 255) || (fssclh > 255))) {
-                       printf("Error : I2C initializing second phase clock\n");
+                       puts("Error : I2C initializing second phase clock\n");
                        return;
                }
 
@@ -99,7 +104,7 @@ void i2c_init(int speed, int slaveadd)
                fssclh -= I2C_FASTSPEED_SCLH_TRIM;
                if (((fsscll < 0) || (fssclh < 0)) ||
                    ((fsscll > 255) || (fssclh > 255))) {
-                       printf("Error : I2C initializing clock\n");
+                       puts("Error : I2C initializing clock\n");
                        return;
                }
 
@@ -118,7 +123,7 @@ void i2c_init(int speed, int slaveadd)
        writew(I2C_CON_EN, &i2c_base->con);
        while (!(readw(&i2c_base->syss) & I2C_SYSS_RDONE) && timeout--) {
                if (timeout <= 0) {
-                       printf("ERROR: Timeout in soft-reset\n");
+                       puts("ERROR: Timeout in soft-reset\n");
                        return;
                }
                udelay(1000);
@@ -284,13 +289,13 @@ int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
        }
 
        if (addr + len > 256) {
-               printf("I2C read: address out of range\n");
+               puts("I2C read: address out of range\n");
                return 1;
        }
 
        for (i = 0; i < len; i++) {
                if (i2c_read_byte(chip, addr + i, &buffer[i])) {
-                       printf("I2C read: I/O error\n");
+                       puts("I2C read: I/O error\n");
                        i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
                        return 1;
                }