diff options
Diffstat (limited to 'recipes/u-boot/u-boot-git/beagleboard/0011-OMAP3-trim-excessively-long-delays-in-i2c-driver.patch')
| -rw-r--r-- | recipes/u-boot/u-boot-git/beagleboard/0011-OMAP3-trim-excessively-long-delays-in-i2c-driver.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/recipes/u-boot/u-boot-git/beagleboard/0011-OMAP3-trim-excessively-long-delays-in-i2c-driver.patch b/recipes/u-boot/u-boot-git/beagleboard/0011-OMAP3-trim-excessively-long-delays-in-i2c-driver.patch new file mode 100644 index 0000000000..6a3a5d9354 --- /dev/null +++ b/recipes/u-boot/u-boot-git/beagleboard/0011-OMAP3-trim-excessively-long-delays-in-i2c-driver.patch @@ -0,0 +1,52 @@ +From 991f54c9da846ab9571c256adf42d8d80d044bdc Mon Sep 17 00:00:00 2001 +From: Steve Sakoman <steve@sakoman.com> +Date: Tue, 16 Feb 2010 10:04:30 -0800 +Subject: [PATCH 11/37] OMAP3: trim excessively long delays in i2c driver + +--- + drivers/i2c/omap24xx_i2c.c | 8 ++++---- + 1 files changed, 4 insertions(+), 4 deletions(-) + +diff --git a/drivers/i2c/omap24xx_i2c.c b/drivers/i2c/omap24xx_i2c.c +index 30a8b4c..ba47fc4 100644 +--- a/drivers/i2c/omap24xx_i2c.c ++++ b/drivers/i2c/omap24xx_i2c.c +@@ -148,7 +148,7 @@ static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value) + if (status & I2C_STAT_XRDY) { + /* Important: have to use byte access */ + writeb (regoffset, &i2c_base->data); +- udelay (20000); ++ udelay (2000); + if (readw (&i2c_base->stat) & I2C_STAT_NACK) { + i2c_error = 1; + } +@@ -160,7 +160,7 @@ static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value) + /* free bus, otherwise we can't use a combined transction */ + writew (0, &i2c_base->con); + while (readw (&i2c_base->stat) || (readw (&i2c_base->con) & I2C_CON_MST)) { +- udelay (10000); ++ udelay (1000); + /* Have to clear pending interrupt to clear I2C_STAT */ + writew (0xFFFF, &i2c_base->stat); + } +@@ -181,7 +181,7 @@ static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value) + #else + *value = readw (&i2c_base->data); + #endif +- udelay (20000); ++ udelay (2000); + } else { + i2c_error = 1; + } +@@ -190,7 +190,7 @@ static int i2c_read_byte (u8 devaddr, u8 regoffset, u8 * value) + writew (I2C_CON_EN, &i2c_base->con); + while (readw (&i2c_base->stat) + || (readw (&i2c_base->con) & I2C_CON_MST)) { +- udelay (10000); ++ udelay (1000); + writew (0xFFFF, &i2c_base->stat); + } + } +-- +1.6.6.1 + |