diff options
| author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-01-08 13:15:45 +0100 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-01-08 13:15:45 +0100 |
| commit | 79f38777947ac7685e2cef8bd977f954ab198c0e (patch) | |
| tree | 6fe053ef751b1c424ec50be338844197b6421d74 /drivers/i2c/omap24xx_i2c.c | |
| parent | 96764df1b47ddebfb50fadf5af72530b07b5fc89 (diff) | |
| parent | 9bd5c1ad0db802c9f8d49d72b443f03431cf6a89 (diff) | |
Merge branch 'u-boot-ti/master' into 'u-boot-arm/master'
This required manual merging drivers/mtd/nand/Makefile
and adding am335x_evm support for CONFIG_SPL_NAND_DRIVERS
Diffstat (limited to 'drivers/i2c/omap24xx_i2c.c')
| -rw-r--r-- | drivers/i2c/omap24xx_i2c.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/i2c/omap24xx_i2c.c b/drivers/i2c/omap24xx_i2c.c index af454f901c..54e9b1586f 100644 --- a/drivers/i2c/omap24xx_i2c.c +++ b/drivers/i2c/omap24xx_i2c.c @@ -31,7 +31,7 @@ DECLARE_GLOBAL_DATA_PTR; #define I2C_TIMEOUT 1000 -static void wait_for_bb(void); +static int wait_for_bb(void); static u16 wait_for_pin(void); static void flush_fifo(void); @@ -159,7 +159,8 @@ static int i2c_read_byte(u8 devaddr, u16 regoffset, u8 alen, u8 *value) u16 w; /* wait until bus not busy */ - wait_for_bb(); + if (wait_for_bb()) + return 1; /* one byte only */ writew(alen, &i2c_base->cnt); @@ -263,7 +264,8 @@ int i2c_probe(uchar chip) return res; /* wait until bus not busy */ - wait_for_bb(); + if (wait_for_bb()) + return res; /* try to read one byte */ writew(1, &i2c_base->cnt); @@ -282,7 +284,10 @@ int i2c_probe(uchar chip) res = 1; writew(0xff, &i2c_base->stat); writew (readw (&i2c_base->con) | I2C_CON_STP, &i2c_base->con); - wait_for_bb (); + + if (wait_for_bb()) + res = 1; + break; } if (status & I2C_STAT_ARDY) { @@ -355,7 +360,8 @@ int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len) } /* wait until bus not busy */ - wait_for_bb(); + if (wait_for_bb()) + return 1; /* start address phase - will write regoffset + len bytes data */ /* TODO consider case when !CONFIG_OMAP243X/34XX/44XX */ @@ -399,7 +405,7 @@ write_exit: return i2c_error; } -static void wait_for_bb(void) +static int wait_for_bb(void) { int timeout = I2C_TIMEOUT; u16 stat; @@ -413,8 +419,10 @@ static void wait_for_bb(void) if (timeout <= 0) { printf("timed out in wait_for_bb: I2C_STAT=%x\n", readw(&i2c_base->stat)); + return 1; } writew(0xFFFF, &i2c_base->stat); /* clear delayed stuff*/ + return 0; } static u16 wait_for_pin(void) |