Raspberry pi linux - bcm2708 i2c patch

@@ -151,6 +151,8 @@ static inline void bcm2708_bsc_setup(struct bcm2708_i2c *bi)
        u32 cdiv;
        u32 c = BSC_C_I2CEN | BSC_C_INTD | BSC_C_ST | BSC_C_CLEAR_1;

+       u32 clkt;
+
        bus_hz = clk_get_rate(bi->clk);
        cdiv = bus_hz / baudrate;

@@ -163,6 +165,11 @@ static inline void bcm2708_bsc_setup(struct bcm2708_i2c *bi
        bcm2708_wr(bi, BSC_A, bi->msg->addr);
        bcm2708_wr(bi, BSC_DLEN, bi->msg->len);
        bcm2708_wr(bi, BSC_C, c);
+
+       /* longer clock stretching timeout (needed by sht21), */
+       /* default timeout is 64 i2c clock cycles (0x40) */
+       clkt = baudrate / 10; /* set to 100 ms */
+       bcm2708_wr(bi, BSC_CLKT, clkt);
 }