Mike Frysinger wrote:
once i enabled that for all Blackfin boards, soft i2c worked for me. so i
posted an updated patch ... if you need some open drain behavior, i think it
best to post a patch on top of that.
-mike
Hi Mike,
Thanks. I tested the v2 patch, and it works well on my nios2
Thomas Chou schrieb:
Reinhard Meyer wrote:
Thomas Chou schrieb:
Reinhard Meyer wrote:
Its even simpler, provided the hardware can do open collector. Here
was my solution for AVR32AP7000:
Then we could add a config for open drain similar to that of linux driver.
# ifndef I2C_SDA
# ifdef
Reinhard Meyer wrote:
Thomas Chou schrieb:
Reinhard Meyer wrote:
Its even simpler, provided the hardware can do open collector. Here
was my solution for AVR32AP7000:
Then we could add a config for open drain similar to that of linux driver.
# ifndef I2C_SDA
# ifdef
Thomas Chou schrieb:
Reinhard Meyer wrote:
Its even simpler, provided the hardware can do open collector. Here
was my solution for AVR32AP7000:
Then we could add a config for open drain similar to that of linux driver.
# ifndef I2C_SDA
# ifdef CONFIG_SOFT_I2C_GPIO_SDA_IS_OPEN_DRAIN
#
On Wednesday, July 07, 2010 00:45:42 Andrew Dyer wrote:
On Tue, Jul 6, 2010 at 1:14 AM, Thomas Chou tho...@wytron.com.tw wrote:
We should not set SDA after TRISTATE, as it results in contention.
Signed-off-by: Thomas Chou tho...@wytron.com.tw
---
drivers/i2c/soft_i2c.c |2 +-
1
On Sun, Jul 11, 2010 at 5:55 PM, Mike Frysinger vap...@gentoo.org wrote:
On Wednesday, July 07, 2010 00:45:42 Andrew Dyer wrote:
On Tue, Jul 6, 2010 at 1:14 AM, Thomas Chou tho...@wytron.com.tw wrote:
We should not set SDA after TRISTATE, as it results in contention.
Signed-off-by: Thomas
Reinhard Meyer wrote:
Whenever possible by the hardware, I make I2C_SDA/SCL(1) do a tri-state and
I2C_TRISTATE and I2C_ACTIVE are empty.
Dear Mike,
I traced the i2c-gpio.c of linux and realized that there are potential
bus contention with the current soft_i2c.c if the ports are not
Thomas Chou wrote:
Reinhard Meyer wrote:
Whenever possible by the hardware, I make I2C_SDA/SCL(1) do a tri-state and
I2C_TRISTATE and I2C_ACTIVE are empty.
Dear Mike,
I traced the i2c-gpio.c of linux and realized that there are potential
bus contention with the current
Reinhard Meyer wrote:
Its even simpler, provided the hardware can do open collector. Here was
my solution for AVR32AP7000:
Then we could add a config for open drain similar to that of linux driver.
# ifndef I2C_SDA
# ifdef CONFIG_SOFT_I2C_GPIO_SDA_IS_OPEN_DRAIN
# define I2C_SDA(bit)
We should not set SDA after TRISTATE, as it results in contention.
Signed-off-by: Thomas Chou tho...@wytron.com.tw
---
drivers/i2c/soft_i2c.c |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/i2c/soft_i2c.c b/drivers/i2c/soft_i2c.c
index 847db76..344b7f8 100644
On Tue, Jul 6, 2010 at 1:14 AM, Thomas Chou tho...@wytron.com.tw wrote:
We should not set SDA after TRISTATE, as it results in contention.
Signed-off-by: Thomas Chou tho...@wytron.com.tw
---
drivers/i2c/soft_i2c.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git
Andrew Dyer wrote:
NAK.
I2C_TRISTATE is supposed to be persistent until I2C_ACTIVE is called,
so in the original code it should still be in effect when I2C_SDA(1)
is executed and there should be no contention. This patch causes the
code to actively drive SDA high at the same time the
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