On Tuesday, November 12, 2013 12:21 AM, Markus Pargmann wrote:
On Mon, Nov 11, 2013 at 10:26:41PM +0800, Shawn Guo wrote:
Copy Markus who is working on imx27 pinctrl driver.
On Mon, Nov 11, 2013 at 12:03:57PM +0000, Mark Rutland wrote:
On Mon, Nov 11, 2013 at 10:45:30AM +0000, Chris Ruehl wrote:
Hi,
Hi,
While this does involve device tree, it's not strictly a device tree
problem, and the people best placed to answer your question don't seem
to be on Cc. You'd get better responses if you used get_maintainer.pl,
or looked at the commit history of the driver or binding to find people
likely to be able to help.
I've added Dong Aisheng, Shawn Guo, and Linus Walleij to Cc, as they had
signed-off-bys on the binding document.
Thanks, Mark.
<snip>
while I port the static code to the DT I step into the problem to
set the PSCR for the sdhc2 ports to 22k pull-up
Is the code from mainline kernel or private tree? I'm asking because I
do not see non-DT imx27 iomux-v1 driver has interface for setting up
DSCR or PSCR in SYSCTRL block. That's probably why Markus did not
support that in the imx27 pinctrl driver, I guess.
DSCR controls groups of pins, for example DS_SLOW10 (DSCR1) controls all
pins of SDHC1 and CSPI3. I don't think a config option for a pin should
influence the behaviour of other pins.
PSCR could be managed by the imx27 pinctrl driver but it is not included
in the GPIO/pinmux module. It is included in "System control module"
which does not exist on imx21 for example.
Regards,
Markus Pargmann
Hi Markus,
do you think its difficult to add the mentioned PSCR manipulations to a
new to add System control module?
Regards
Chris
Shawn
I look for something like described in
pinctrl/fsl,imx-pinctrl.txt
the fsl,imx27-pinctrl only say 0/1 dis/enable pull up but not the strength.
pinctrl_sdhc2_1: sdhc2-1 {
fsl,pins =<
MX27_PAD_SD2_D0__SD2_D0 0x1
MX27_PAD_SD2_D1__SD2_D1 0x1
MX27_PAD_SD2_D2__SD2_D2 0x1
MX27_PAD_SD2_D3__SD2_D3 0x1
MX27_PAD_SD2_CLK__SD2_CLK 0x1
MX27_PAD_SD2_CMD__SD2_CMD 0x1
>;
};
its setup in board specific c-file
/* 22k pull-up for sd2 pins */
reg = __raw_readw(MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR + MX27_SYS_PSCR));
reg&= ~0xfff0;
reg |= 0xfff0;
__raw_writew(reg, MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR + MX27_SYS_PSCR));
Any successions?
Regards
Chris
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