| Message ID | 1349973274-24936-1-git-send-email-const@MakeLinux.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Thu, Oct 11, 2012 at 06:34:34PM +0200, Constantine Shulyupin wrote: > From: Constantine Shulyupin <const@MakeLinux.com> > > Sets USB PHY clock source to 24 MHz clock. > > Tested with OTG configuration, usb gadget g_zero on DM365 EVM connected to PC. > > To active the patch need to call davinci_setup_usb from dm365_evm_init > > References: > > Definition of USB_PHY_CTRL and PHYCLKFREQ: > - http://www.makelinux.com/lib/ti/DM36x_ARM/doc-141 > > Original patch by miguel.aguilar@ridgerun.com three years ago: > - http://www.mail-archive.com/davinci-linux-open-source@linux.davincidsp.com/msg14741.html > > Signed-off-by: Constantine Shulyupin <const@MakeLinux.com> > --- > > Note: > > Changelog > > Changes since v6 > - moved call to davinci_setup_usb from dm365_evm_init to another patch accordinly request of Sergei > > Changes since v5 http://www.spinics.net/lists/kernel/msg1413120.html > accordingy feedback of nsekhar@ti.com http://www.spinics.net/lists/kernel/msg1414914.html > - phy configuration moved to drivers/usb/musb/davinci.c > - USB_OTG configuration is submitted in separated patch: http://www.spinics.net/lists/kernel/msg1414964.html > - Setting current limit to 1000 mA. Any way the current is limited to 510 mA in davinci_setup_usb. > > Changes since v4 http://www.spinics.net/lists/kernel/msg1412995.html > - removed fix of dev_info in musb_init_controller > > Changes since v3 http://www.spinics.net/lists/kernel/msg1412544.html: > - removed optional altering of pr_info > > Changes since v1 http://marc.info/?l=linux-kernel&m=130894150803661&w=2: > - removed optional code and reordered > - removed alternation of GPIO33, which is multiplexed with DRVVBUS, because is not need for peripheral USB > > This patch is based on code from projects Arago, Angstom and RidgeRun. > > --- > drivers/usb/musb/davinci.c | 3 +++ > drivers/usb/musb/davinci.h | 1 + > > diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c > index 472c8b4..af09ebf 100644 > --- a/drivers/usb/musb/davinci.c > +++ b/drivers/usb/musb/davinci.c > @@ -428,6 +428,9 @@ static int davinci_musb_init(struct musb *musb) > __raw_writel(deepsleep, DM355_DEEPSLEEP); > } > > + if (machine_is_davinci_dm365_evm()) > + writel(readl(USB_PHY_CTRL) | USBPHY_CLKFREQ_24MHZ, USB_PHY_CTRL); NAK!!! No machine_is_* in drivers/ directory. You shouldn't control your PHY directly, you need a PHY driver.
diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c index 472c8b4..af09ebf 100644 --- a/drivers/usb/musb/davinci.c +++ b/drivers/usb/musb/davinci.c @@ -428,6 +428,9 @@ static int davinci_musb_init(struct musb *musb) __raw_writel(deepsleep, DM355_DEEPSLEEP); } + if (machine_is_davinci_dm365_evm()) + writel(readl(USB_PHY_CTRL) | USBPHY_CLKFREQ_24MHZ, USB_PHY_CTRL); + /* reset the controller */ musb_writel(tibase, DAVINCI_USB_CTRL_REG, 0x1); diff --git a/drivers/usb/musb/davinci.h b/drivers/usb/musb/davinci.h index 371baa0..e737d97 100644 --- a/drivers/usb/musb/davinci.h +++ b/drivers/usb/musb/davinci.h @@ -16,6 +16,7 @@ /* Integrated highspeed/otg PHY */ #define USBPHY_CTL_PADDR 0x01c40034 +#define USBPHY_CLKFREQ_24MHZ BIT(13) #define USBPHY_DATAPOL BIT(11) /* (dm355) switch D+/D- */ #define USBPHY_PHYCLKGD BIT(8) #define USBPHY_SESNDEN BIT(7) /* v(sess_end) comparator */