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usb: host: ehci: adding regulator framework in ehci-omap.c driver. 

OMAP3 has three HS USB ports so it can have three different regulator
for each PHY connected to each port.

Currently these regulators are assumed to be optional and driver doesn't
fail but continue with the initialization if it doesn't get any regulators.

Regulator supply names has to be mapped in board files as 'hsusbN' where
'N' is port number and can be {0, 1 ,2}.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Ajay Kumar Gupta 2009-12-28 13:40:46 +02:00 committed by Greg Kroah-Hartman
parent d3ae8562d4
commit 8811426606
1 changed files with 36 additions and 0 deletions
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36
drivers/usb/host/ehci-omap.c
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@ -37,6 +37,7 @@
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/gpio.h> #include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <plat/usb.h> #include <plat/usb.h>
/* /*
@ -178,6 +179,11 @@ struct ehci_hcd_omap {
void __iomem *uhh_base; void __iomem *uhh_base;
void __iomem *tll_base; void __iomem *tll_base;
void __iomem *ehci_base; void __iomem *ehci_base;
/* Regulators for USB PHYs.
* Each PHY can have a seperate regulator.
*/
struct regulator *regulator[OMAP3_HS_USB_PORTS];
}; };
/*-------------------------------------------------------------------------*/ /*-------------------------------------------------------------------------*/
@ -546,6 +552,8 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
int irq = platform_get_irq(pdev, 0); int irq = platform_get_irq(pdev, 0);
int ret = -ENODEV; int ret = -ENODEV;
int i;
char supply[7];
if (!pdata) { if (!pdata) {
dev_dbg(&pdev->dev, "missing platform_data\n"); dev_dbg(&pdev->dev, "missing platform_data\n");
@ -613,6 +621,21 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
goto err_tll_ioremap; goto err_tll_ioremap;
} }
/* get ehci regulator and enable */
for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
if (omap->port_mode[i] != EHCI_HCD_OMAP_MODE_PHY) {
omap->regulator[i] = NULL;
continue;
}
snprintf(supply, sizeof(supply), "hsusb%d", i);
omap->regulator[i] = regulator_get(omap->dev, supply);
if (IS_ERR(omap->regulator[i]))
dev_dbg(&pdev->dev,
"failed to get ehci port%d regulator\n", i);
else
regulator_enable(omap->regulator[i]);
}
ret = omap_start_ehc(omap, hcd); ret = omap_start_ehc(omap, hcd);
if (ret) { if (ret) {
dev_dbg(&pdev->dev, "failed to start ehci\n"); dev_dbg(&pdev->dev, "failed to start ehci\n");
@ -641,6 +664,12 @@ err_add_hcd:
omap_stop_ehc(omap, hcd); omap_stop_ehc(omap, hcd);
err_start: err_start:
for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
if (omap->regulator[i]) {
regulator_disable(omap->regulator[i]);
regulator_put(omap->regulator[i]);
}
}
iounmap(omap->tll_base); iounmap(omap->tll_base);
err_tll_ioremap: err_tll_ioremap:
@ -674,10 +703,17 @@ static int ehci_hcd_omap_remove(struct platform_device *pdev)
{ {
struct ehci_hcd_omap *omap = platform_get_drvdata(pdev); struct ehci_hcd_omap *omap = platform_get_drvdata(pdev);
struct usb_hcd *hcd = ehci_to_hcd(omap->ehci); struct usb_hcd *hcd = ehci_to_hcd(omap->ehci);
int i;
usb_remove_hcd(hcd); usb_remove_hcd(hcd);
omap_stop_ehc(omap, hcd); omap_stop_ehc(omap, hcd);
iounmap(hcd->regs); iounmap(hcd->regs);
for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
if (omap->regulator[i]) {
regulator_disable(omap->regulator[i]);
regulator_put(omap->regulator[i]);
}
}
iounmap(omap->tll_base); iounmap(omap->tll_base);
iounmap(omap->uhh_base); iounmap(omap->uhh_base);
usb_put_hcd(hcd); usb_put_hcd(hcd);