diff options
| author | Bruno Herrera <bruherrera@gmail.com> | 2017-02-01 04:25:43 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-04-11 10:58:17 +0300 |
| commit | e35b135055e24d705736fd98c975afc46a793a09 (patch) | |
| tree | a4e794cbf70cb330f4214659de128e511ed1e1ca /drivers/usb/dwc2/hcd.c | |
| parent | f87599a0d7777242273b44e45f741a0c61292771 (diff) | |
| download | linux-e35b135055e24d705736fd98c975afc46a793a09.tar.xz | |
usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)
This patch introduces a new parameter to activate USB OTG HS/FS core
embedded phy transceiver. The STM32F4x9 SoC uses the GGPIO register
to enable the transceiver.
Also add the dwc2_set_params function for stm32f4 otg fs.
Acked-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/hcd.c')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 91ed5b61a6d9..740c7e86d31b 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -121,7 +121,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg) static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy) { - u32 usbcfg, i2cctl; + u32 usbcfg, ggpio, i2cctl; int retval = 0; /* @@ -145,6 +145,19 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy) return retval; } } + + if (hsotg->params.activate_stm_fs_transceiver) { + ggpio = dwc2_readl(hsotg->regs + GGPIO); + if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN)) { + dev_dbg(hsotg->dev, "Activating transceiver\n"); + /* + * STM32F4x9 uses the GGPIO register as general + * core configuration register. + */ + ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN; + dwc2_writel(ggpio, hsotg->regs + GGPIO); + } + } } /* |