diff options
| author |   Matthijs Kooijman <matthijs@stdin.nl> | 2013-08-30 18:45:14 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-30 14:14:52 -0700 |
| commit | 1c58ce133971e7159f51f331717a61632a2a3897 (patch) | |
| tree | 3dd27f26737b741de11b9c35824e6725fcf05c53 /drivers/staging/dwc2 | |
| parent | staging: dwc2: unshift non-bool register value constants (diff) | |
| download | linux-dev-1c58ce133971e7159f51f331717a61632a2a3897.tar.xz linux-dev-1c58ce133971e7159f51f331717a61632a2a3897.zip | |
staging: dwc2: only read the snpsid register once
This (read-only) register was read twice, storing it for later use the
second time. Now it is only read once, storing it right away.
Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/dwc2')
| -rw-r--r-- | drivers/staging/dwc2/hcd.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/staging/dwc2/hcd.c b/drivers/staging/dwc2/hcd.c index 4e8fec0640e8..d48830414561 100644 --- a/drivers/staging/dwc2/hcd.c +++ b/drivers/staging/dwc2/hcd.c @@ -2734,7 +2734,7 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq, { struct usb_hcd *hcd; struct dwc2_host_chan *channel; - u32 snpsid, gusbcfg, hcfg; + u32 gusbcfg, hcfg; int i, num_channels; int retval = -ENOMEM; @@ -2746,10 +2746,11 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq, * 0x45f42xxx or 0x45f43xxx, which corresponds to either "OT2" or "OT3", * as in "OTG version 2.xx" or "OTG version 3.xx". */ - snpsid = readl(hsotg->regs + GSNPSID); - if ((snpsid & 0xfffff000) != 0x4f542000 && - (snpsid & 0xfffff000) != 0x4f543000) { - dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n", snpsid); + hsotg->snpsid = readl(hsotg->regs + GSNPSID); + if ((hsotg->snpsid & 0xfffff000) != 0x4f542000 && + (hsotg->snpsid & 0xfffff000) != 0x4f543000) { + dev_err(hsotg->dev, "Bad value for GSNPSID: 0x%08x\n", + hsotg->snpsid); retval = -ENODEV; goto error1; } @@ -2880,7 +2881,6 @@ int dwc2_hcd_init(struct dwc2_hsotg *hsotg, int irq, } INIT_WORK(&hsotg->wf_otg, dwc2_conn_id_status_change); - hsotg->snpsid = readl(hsotg->regs + GSNPSID); dev_dbg(hsotg->dev, "Core Release: %1x.%1x%1x%1x\n", hsotg->snpsid >> 12 & 0xf, hsotg->snpsid >> 8 & 0xf, hsotg->snpsid >> 4 & 0xf, hsotg->snpsid & 0xf); |