mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
ARM: 6406/1: at91sam9g45: fix i2c bus speed
Use a correct udelay value to get bus speed around 100KHz. The udelay value was most likely copied from the older devices, but the 9g45 is signicantly faster (400MHz, DDR, ..), so a udelay of 2 gives a bus speed of around 190KHz, which is too fast for some devices. A udelay value of 5 gives a bus speed of around 90KHz here. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
parent
94bf275866
commit
1d5b4c0fa9
1 changed files with 2 additions and 2 deletions
|
@ -426,7 +426,7 @@ static struct i2c_gpio_platform_data pdata_i2c0 = {
|
|||
.sda_is_open_drain = 1,
|
||||
.scl_pin = AT91_PIN_PA21,
|
||||
.scl_is_open_drain = 1,
|
||||
.udelay = 2, /* ~100 kHz */
|
||||
.udelay = 5, /* ~100 kHz */
|
||||
};
|
||||
|
||||
static struct platform_device at91sam9g45_twi0_device = {
|
||||
|
@ -440,7 +440,7 @@ static struct i2c_gpio_platform_data pdata_i2c1 = {
|
|||
.sda_is_open_drain = 1,
|
||||
.scl_pin = AT91_PIN_PB11,
|
||||
.scl_is_open_drain = 1,
|
||||
.udelay = 2, /* ~100 kHz */
|
||||
.udelay = 5, /* ~100 kHz */
|
||||
};
|
||||
|
||||
static struct platform_device at91sam9g45_twi1_device = {
|
||||
|
|
Loading…
Reference in a new issue