On Wed, 18 Dec 2013, Sebastian Andrzej Siewior wrote: > The purpose of reg_se_cache has been defeated. It should avoid the > read-back of the register to avoid the latency and the fact that the > bits are reset to 0 after the individual conversation took place. > > The reason why this is required like this to work, is that read-back of > the register removes the bits of the ADC so they do not start another > conversation after the register is re-written from the TSC side for the > update. > To avoid the unrequired read-back I introduce a "set adc" variant which > does not update the cache mask. After the conversation completes, the > register bit is removed from the SE reister anyway and we don't plan a > new conversation "any time soon". > This is a small preparation for a larger sync-rework. > > Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> > --- > drivers/iio/adc/ti_am335x_adc.c | 2 +- > drivers/mfd/ti_am335x_tscadc.c | 12 ++++++++++-- > include/linux/mfd/ti_am335x_tscadc.h | 1 + > 3 files changed, 12 insertions(+), 3 deletions(-) Looks about right: Acked-by: Lee Jones <lee.jones@xxxxxxxxxx> -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
