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authorAjay Kumar Gupta <ajay.gupta@ti.com>2009-12-28 13:40:46 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-02 14:53:49 -0800
commit881142660697bba0f3ef44f070d80632082c978f (patch)
treee2c6cd69cd0331523e74ed95a385ca2a0c405fcf
parentd3ae8562d43fe2b97d605dd67dc67bf8fa9b956a (diff)
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>
-rw-r--r--drivers/usb/host/ehci-omap.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 2460f0d8299..17e4ceb5014 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -37,6 +37,7 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/gpio.h>
+#include <linux/regulator/consumer.h>
#include <plat/usb.h>
/*
@@ -178,6 +179,11 @@ struct ehci_hcd_omap {
void __iomem *uhh_base;
void __iomem *tll_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 ret = -ENODEV;
+ int i;
+ char supply[7];
if (!pdata) {
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;
}
+ /* 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);
if (ret) {
dev_dbg(&pdev->dev, "failed to start ehci\n");
@@ -641,6 +664,12 @@ err_add_hcd:
omap_stop_ehc(omap, hcd);
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);
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 usb_hcd *hcd = ehci_to_hcd(omap->ehci);
+ int i;
usb_remove_hcd(hcd);
omap_stop_ehc(omap, hcd);
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->uhh_base);
usb_put_hcd(hcd);