From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sourav Poddar Date: Thu, 19 Dec 2013 10:35:14 +0530 Subject: [U-Boot] [UBOOT][PATCH 5/5] am43xx: add delay before xfer In-Reply-To: References: <1384443573-1545-1-git-send-email-sourav.poddar@ti.com> <1384443573-1545-6-git-send-email-sourav.poddar@ti.com> Message-ID: <52B27E8A.8090102@ti.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Thursday 19 December 2013 12:17 AM, Jagan Teki wrote: > On Thu, Nov 14, 2013 at 9:09 PM, Sourav Poddar wrote: >> Without this delay, write/read is failing. >> Looks like, the WIP always remain set and hence a timeout >> occurs leading to the error. >> >> Signed-off-by: Sourav Poddar >> --- >> Hi Jagan, >> This patch seems to be necessary for read/write. >> I tested by changing few timing variables, but it did not help. >> The same driver works on J6 with a differnet flash(S25FL256S). >> Is any one tested macronix flash at uboot? > Delay must be for macronix? > or common for all flashes. > For macronix. > I haven't tested macronix > >> drivers/spi/ti_qspi.c | 3 +++ >> 1 files changed, 3 insertions(+), 0 deletions(-) >> >> diff --git a/drivers/spi/ti_qspi.c b/drivers/spi/ti_qspi.c >> index 5666250..aa7b6ae 100644 >> --- a/drivers/spi/ti_qspi.c >> +++ b/drivers/spi/ti_qspi.c >> @@ -285,6 +285,9 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, >> qslave->cmd |= QSPI_3_PIN; >> qslave->cmd |= 0xfff; >> >> +#ifdef CONFIG_AM43XX >> + udelay(100); >> +#endif >> while (words--) { >> if (txp) { >> debug("tx cmd %08x dc %08x data %02x\n", >> -- >> 1.7.1 >> >> _______________________________________________ >> U-Boot mailing list >> U-Boot at lists.denx.de >> http://lists.denx.de/mailman/listinfo/u-boot > >