On 08/29/2012 09:28 AM, Nikolaus Voss : > The old driver has two main deficencies: > i) No repeated start (Sr) condiction is possible, this makes it unusable > e.g. for most SMBus transfers. > ii) I/O was done with polling/busy waiting what caused over-/underruns > even at light system loads and clock speeds. > > The new driver overcomes these deficencies and in addition allows for > more than one TWI interface. > > A remaining limitation is the fact, that only one repeated start is > possible (two concatenated messages). This limitation is imposed by > the hardware. However, this should not be a problem as all common > i2c-client communication does not rely on more than one repeated start. > > Changes since v11: > - corrected wrong id_entry on sam9261 twi gpio pdev Hi Wolfram, Despite the patch revision written in the subject, it is actually the real v12 patch series from Nikolaus. BTW, I suspect that you were not in copy... In addition to the "Tested-By" tag by Ludovic, you can add my: Reviewed-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx> > Nikolaus Voss (4): > drivers/i2c/busses/i2c-at91.c: remove old polling driver > Replace clk_lookup.con_id with clk_lookup.dev_id entries for twi clk > drivers/i2c/busses/i2c-at91.c: add new driver > G45 TWI: remove open drain setting for twi function gpios > > arch/arm/mach-at91/at91rm9200.c | 1 + > arch/arm/mach-at91/at91rm9200_devices.c | 9 + > arch/arm/mach-at91/at91sam9260.c | 1 + > arch/arm/mach-at91/at91sam9261.c | 1 + > arch/arm/mach-at91/at91sam9261_devices.c | 9 + > arch/arm/mach-at91/at91sam9263.c | 1 + > arch/arm/mach-at91/at91sam9g45.c | 2 + > arch/arm/mach-at91/at91sam9g45_devices.c | 6 - > arch/arm/mach-at91/at91sam9rl.c | 2 + > arch/arm/mach-at91/at91sam9x5.c | 3 + > arch/arm/mach-at91/include/mach/at91_twi.h | 68 ---- > drivers/i2c/busses/Kconfig | 11 +- > drivers/i2c/busses/i2c-at91.c | 591 ++++++++++++++++++---------- > 13 files changed, 418 insertions(+), 287 deletions(-) > delete mode 100644 arch/arm/mach-at91/include/mach/at91_twi.h > -- Nicolas Ferre -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
