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Code Issues Releases Wiki Activity

mfd: omap-usb-host: know about number of ports from revision register

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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>
This commit is contained in:
Roger Quadros 2012-11-08 18:04:26 +02:00
parent 27d4f2c654
commit d7eaf86610
1 changed files with 28 additions and 5 deletions
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33
drivers/mfd/omap-usb-host.c
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@ -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) {