Hi Sekhar, On Fri, 30 Mar 2018 20:00:51 +0530 Sekhar Nori <[email protected]> wrote:
> NAND itself is an asynchronous interface, it does not have any > clock input. DaVinci NAND driver acquires clock for AEMIF > (asynchronous external memory interface) which is an on-chip > IP to which NAND is connected. > > The same clock is also enabled in AEMIF driver (either present > drivers/memory or from machine code for some older platforms). > AEMIF timing must be initialized before NAND can be accessed. > This ensures that AEMIF clock is enabled too. > > Remove the superfluous clock acquisition and enable in DaVinci > NAND driver. > > Tested on K2L, K2HK, K2E, DA850 EVM, DA850 LCDK in device-tree > boot and DM644x EVM in legacy boot. > > Signed-off-by: Sekhar Nori <[email protected]> > --- > Hi Boris, > > If/when this patch gets accepted, it will nice to put this on > an immutable branch others can merge. There is potential cleanup > in drivers/clock and in DaVinci machine code that will depend > on this. I prepared the nand/davinci-clock tag for you to fetch if needed. I'll merge it into the nand/next branch soon. Thanks, Boris The following changes since commit 60cc43fc888428bb2f18f08997432d426a243338: Linux 4.17-rc1 (2018-04-15 18:24:20 -0700) are available in the git repository at: git://git.infradead.org/linux-mtd.git tags/nand/davinci-clock for you to fetch changes up to a8e3923ab57192547ffad01d78939c5c0d5d0c30: mtd: rawnand: davinci: don't acquire and enable clock (2018-04-26 19:55:40 +0200) ---------------------------------------------------------------- Prepare things for davinci clk driver cleanup ---------------------------------------------------------------- Sekhar Nori (1): mtd: rawnand: davinci: don't acquire and enable clock drivers/mtd/nand/raw/davinci_nand.c | 25 +------------------------ 1 file changed, 1 insertion(+), 24 deletions(-)
