diff options
| author | Peter Chen <peter.chen@freescale.com> | 2014-01-10 13:51:27 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-13 15:55:19 -0800 |
| commit | ed8f8318d2ef3e5f9e4ddf79349508c116b68d7f (patch) | |
| tree | fc8309d0c9eb301472c321c3eb339e49ccc72f65 /drivers/usb/chipidea/core.c | |
| parent | feffe09f510c475df082546815f9e4a573f6a233 (diff) | |
usb: chipidea: add freescale imx28 special write register method
According to Freescale imx28 Errata, "ENGR119653 USB: ARM to USB
register error issue", All USB register write operations must
use the ARM SWP instruction. So, we implement special hw_write
and hw_test_and_clear for imx28.
Discussion for it at below:
http://marc.info/?l=linux-usb&m=137996395529294&w=2
This patch is needed for stable tree 3.11+.
Cc: stable@vger.kernel.org
Cc: robert.hodaszi@digi.com
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/chipidea/core.c')
| -rw-r--r-- | drivers/usb/chipidea/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 458d8e412505..0ead0b4a11e1 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -548,6 +548,8 @@ static int ci_hdrc_probe(struct platform_device *pdev) ci->dev = dev; ci->platdata = dev->platform_data; + ci->imx28_write_fix = !!(ci->platdata->flags & + CI_HDRC_IMX28_WRITE_FIX); ret = hw_device_init(ci, base); if (ret < 0) { |