On 17:08 Fri 22 Nov , [email protected] wrote: > From: Ludovic Desroches <[email protected]> > > With some devices, transfer hangs during I2C frame transmission. This issue > disappears when reducing the internal frequency of the TWI IP. Even if it is > indicated that internal clock max frequency is 66MHz, it seems we have > oversampling on I2C signals making TWI believe that a transfer in progress > is done.
so now the IP run a 16MHz you could also mention that now we save power too Acked-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]> Best Regards, J. > > This fix has no impact on the I2C bus frequency. > > Cc: <[email protected]> #3.10+ > Acked-by: Nicolas Ferre <[email protected]> > Signed-off-by: Ludovic Desroches <[email protected]> > --- > > v2: update commit message > > arch/arm/mach-at91/sama5d3.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/mach-at91/sama5d3.c b/arch/arm/mach-at91/sama5d3.c > index 4012797..4ee0de5 100644 > --- a/arch/arm/mach-at91/sama5d3.c > +++ b/arch/arm/mach-at91/sama5d3.c > @@ -95,19 +95,19 @@ static struct clk twi0_clk = { > .name = "twi0_clk", > .pid = SAMA5D3_ID_TWI0, > .type = CLK_TYPE_PERIPHERAL, > - .div = AT91_PMC_PCR_DIV2, > + .div = AT91_PMC_PCR_DIV8, > }; > static struct clk twi1_clk = { > .name = "twi1_clk", > .pid = SAMA5D3_ID_TWI1, > .type = CLK_TYPE_PERIPHERAL, > - .div = AT91_PMC_PCR_DIV2, > + .div = AT91_PMC_PCR_DIV8, > }; > static struct clk twi2_clk = { > .name = "twi2_clk", > .pid = SAMA5D3_ID_TWI2, > .type = CLK_TYPE_PERIPHERAL, > - .div = AT91_PMC_PCR_DIV2, > + .div = AT91_PMC_PCR_DIV8, > }; > static struct clk mmc0_clk = { > .name = "mci0_clk", > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
