The udc has three supplies: vdda (3.3V), vddi (1.2V) and vddosc (1.8-3.3V). Turn these on and off on start and stop calls.
Signed-off-by: Heiko Stuebner <[email protected]> --- drivers/usb/gadget/s3c-hsudc.c | 43 ++++++++++++++++++++++++++++++++++++--- 1 files changed, 39 insertions(+), 4 deletions(-) diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c index a47bfa0..584a80f 100644 --- a/drivers/usb/gadget/s3c-hsudc.c +++ b/drivers/usb/gadget/s3c-hsudc.c @@ -29,6 +29,7 @@ #include <linux/usb/otg.h> #include <linux/prefetch.h> #include <linux/usb/s3c-hsudc.h> +#include <linux/regulator/consumer.h> #include <mach/regs-s3c2443-clock.h> @@ -87,6 +88,12 @@ #define DATA_STATE_XMIT (1) #define DATA_STATE_RECV (2) +static const char * const s3c_hsudc_supply_names[] = { + "vdda", /* analog phy supply, 3.3V */ + "vddi", /* digital phy supply, 1.2V */ + "vddosc", /* oscillator supply, 1.8V - 3.3V */ +}; + /** * struct s3c_hsudc_ep - Endpoint representation used by driver. * @ep: USB gadget layer representation of device endpoint. @@ -139,6 +146,7 @@ struct s3c_hsudc { struct device *dev; struct s3c24xx_hsudc_platdata *pd; struct otg_transceiver *transceiver; + struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsudc_supply_names)]; spinlock_t lock; void __iomem *regs; struct resource *mem_rsrc; @@ -1150,15 +1158,20 @@ static int s3c_hsudc_start(struct usb_gadget *g, hsudc->driver = driver; hsudc->gadget.dev.driver = &driver->driver; + ret = regulator_bulk_enable(ARRAY_SIZE(hsudc->supplies), + hsudc->supplies); + if (ret != 0) { + dev_err(hsudc->dev, "failed to enable supplies: %d\n", ret); + goto err_supplies; + } + /* connect to bus through transceiver */ if (hsudc->transceiver) { ret = otg_set_peripheral(hsudc->transceiver, &hsudc->gadget); if (ret) { dev_err(hsudc->dev, "%s: can't bind to transceiver\n", hsudc->gadget.name); - hsudc->driver = NULL; - hsudc->gadget.dev.driver = NULL; - return ret; + goto err_otg; } } @@ -1171,6 +1184,12 @@ static int s3c_hsudc_start(struct usb_gadget *g, hsudc->pd->gpio_init(); return 0; +err_otg: + regulator_bulk_disable(ARRAY_SIZE(hsudc->supplies), hsudc->supplies); +err_supplies: + hsudc->driver = NULL; + hsudc->gadget.dev.driver = NULL; + return ret; } static int s3c_hsudc_stop(struct usb_gadget *g, @@ -1200,6 +1219,8 @@ static int s3c_hsudc_stop(struct usb_gadget *g, disable_irq(hsudc->irq); + regulator_bulk_disable(ARRAY_SIZE(hsudc->supplies), hsudc->supplies); + dev_info(hsudc->dev, "unregistered gadget driver '%s'\n", driver->driver.name); return 0; @@ -1248,7 +1269,7 @@ static int __devinit s3c_hsudc_probe(struct platform_device *pdev) struct resource *res; struct s3c_hsudc *hsudc; struct s3c24xx_hsudc_platdata *pd = pdev->dev.platform_data; - int ret; + int ret, i; hsudc = kzalloc(sizeof(struct s3c_hsudc) + sizeof(struct s3c_hsudc_ep) * pd->epnum, @@ -1265,6 +1286,16 @@ static int __devinit s3c_hsudc_probe(struct platform_device *pdev) hsudc->transceiver = otg_get_transceiver(); + for (i = 0; i < ARRAY_SIZE(hsudc->supplies); i++) + hsudc->supplies[i].supply = s3c_hsudc_supply_names[i]; + + ret = regulator_bulk_get(dev, ARRAY_SIZE(hsudc->supplies), + hsudc->supplies); + if (ret != 0) { + dev_err(dev, "failed to request supplies: %d\n", ret); + goto err_supplies; + } + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(dev, "unable to obtain driver resource data\n"); @@ -1360,6 +1391,8 @@ err_res: if (hsudc->transceiver) otg_put_transceiver(hsudc->transceiver); + regulator_bulk_free(ARRAY_SIZE(hsudc->supplies), hsudc->supplies); +err_supplies: kfree(hsudc); return ret; } @@ -1382,6 +1415,8 @@ static int __devexit s3c_hsudc_remove(struct platform_device *pdev) release_resource(hsudc->mem_rsrc); kfree(hsudc->mem_rsrc); + regulator_bulk_free(ARRAY_SIZE(hsudc->supplies), hsudc->supplies); + if (hsudc->transceiver) otg_put_transceiver(hsudc->transceiver); -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
