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Groups > linux.kernel > #1714982
| From | Ben Hutchings <ben@decadent.org.uk> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 3.16 085/134] mfd: omap-usb-tll: Fix inverted bit use for USB TLL mode |
| Date | 2017-08-18 15:40 +0200 |
| Message-ID | <ufPFg-4ln-3@gated-at.bofh.it> (permalink) |
| References | <ufPlT-4d0-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
3.16.47-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Tony Lindgren <tony@atomide.com>
commit 8b8a84c54aff4256d592dc18346c65ecf6811b45 upstream.
Commit 16fa3dc75c22 ("mfd: omap-usb-tll: HOST TLL platform driver")
added support for USB TLL, but uses OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
bit the wrong way. The comments in the code are correct, but the inverted
use of OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF causes the register to be
enabled instead of disabled unlike what the comments say.
Without this change the Wrigley 3G LTE modem on droid 4 EHCI bus can
be only pinged few times before it stops responding.
Fixes: 16fa3dc75c22 ("mfd: omap-usb-tll: HOST TLL platform driver")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/mfd/omap-usb-tll.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -376,8 +376,8 @@ int omap_tll_init(struct usbhs_omap_plat
* and use SDR Mode
*/
reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
- | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
| OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
+ reg |= OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF;
} else if (pdata->port_mode[i] ==
OMAP_EHCI_PORT_MODE_HSIC) {
/*
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[PATCH 3.16 085/134] mfd: omap-usb-tll: Fix inverted bit use for USB TLL mode Ben Hutchings <ben@decadent.org.uk> - 2017-08-18 15:40 +0200
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