diff options
| author | Roger Quadros <rogerq@ti.com> | 2012-11-08 18:04:26 +0200 |
|---|---|---|
| committer | Roger Quadros <rogerq@ti.com> | 2013-02-13 13:22:48 +0200 |
| commit | d7eaf866104757d66ccb6627dccf7fb9d07aae7e (patch) | |
| tree | 74e0adb8a937075dd76942a575b0d571c3c57d20 /drivers/mfd | |
| parent | 27d4f2c654e39bed13374af9537633de414057b6 (diff) | |
| download | op-kernel-dev-d7eaf866104757d66ccb6627dccf7fb9d07aae7e.zip op-kernel-dev-d7eaf866104757d66ccb6627dccf7fb9d07aae7e.tar.gz | |
mfd: omap-usb-host: know about number of ports from revision register
The revision register should tell us how many ports are present.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/omap-usb-host.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c index 310aaa9..26319ca 100644 --- a/drivers/mfd/omap-usb-host.c +++ b/drivers/mfd/omap-usb-host.c @@ -91,6 +91,8 @@ struct usbhs_hcd_omap { + int nports; + struct clk *xclk60mhsp1_ck; struct clk *xclk60mhsp2_ck; struct clk *utmi_p1_fck; @@ -347,8 +349,6 @@ static void omap_usbhs_init(struct device *dev) pm_runtime_get_sync(dev); spin_lock_irqsave(&omap->lock, flags); - omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION); - dev_dbg(dev, "OMAP UHH_REVISION 0x%x\n", omap->usbhs_rev); reg = usbhs_read(omap->uhh_base, OMAP_UHH_HOSTCONFIG); /* setup ULPI bypass and burst configurations */ @@ -483,7 +483,32 @@ static int usbhs_omap_probe(struct platform_device *pdev) pm_runtime_enable(dev); - for (i = 0; i < OMAP3_HS_USB_PORTS; i++) + platform_set_drvdata(pdev, omap); + pm_runtime_get_sync(dev); + + omap->usbhs_rev = usbhs_read(omap->uhh_base, OMAP_UHH_REVISION); + + /* we need to call runtime suspend before we update omap->nports + * to prevent unbalanced clk_disable() + */ + pm_runtime_put_sync(dev); + + switch (omap->usbhs_rev) { + case OMAP_USBHS_REV1: + omap->nports = 3; + break; + case OMAP_USBHS_REV2: + omap->nports = 2; + break; + default: + omap->nports = OMAP3_HS_USB_PORTS; + dev_dbg(dev, + "USB HOST Rev : 0x%d not recognized, assuming %d ports\n", + omap->usbhs_rev, omap->nports); + break; + } + + for (i = 0; i < omap->nports; i++) if (is_ehci_phy_mode(i) || is_ehci_tll_mode(i) || is_ehci_hsic_mode(i)) { omap->ehci_logic_fck = clk_get(dev, "ehci_logic_fck"); @@ -573,8 +598,6 @@ static int usbhs_omap_probe(struct platform_device *pdev) "failed error:%d\n", ret); } - platform_set_drvdata(pdev, omap); - omap_usbhs_init(dev); ret = omap_usbhs_alloc_children(pdev); if (ret) { |
