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usb: dwc3: core: write LINUX_VERSION_CODE to our GUID register

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DWC3's GUID register is supposed to be used to write
any sort of version we might want. It helps when getting
bug reports for platforms you don't have HW to know
which kernel version of the driver was running on the
platform.

Because we don't really track driver version, but we _do_
track the kernel version, let's write LINUX_VERSION_CODE to
that register and use it for debugging.

Reviewed-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2014-09-19 15:51:11 -05:00
parent 0df1f2487d
commit fa0ea13e9f
1 changed files with 7 additions and 0 deletions
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7
drivers/usb/dwc3/core.c
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@ -19,6 +19,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/ */
#include <linux/version.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/slab.h> #include <linux/slab.h>
@ -384,6 +385,12 @@ static int dwc3_core_init(struct dwc3 *dwc)
} }
dwc->revision = reg; dwc->revision = reg;
/*
* Write Linux Version Code to our GUID register so it's easy to figure
* out which kernel version a bug was found.
*/
dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE);
/* Handle USB2.0-only core configuration */ /* Handle USB2.0-only core configuration */
if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) == if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
DWC3_GHWPARAMS3_SSPHY_IFC_DIS) { DWC3_GHWPARAMS3_SSPHY_IFC_DIS) {