From patchwork Tue Mar 10 10:09:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrick Delaunay X-Patchwork-Id: 243477 List-Id: U-Boot discussion From: patrick.delaunay at st.com (Patrick Delaunay) Date: Tue, 10 Mar 2020 11:09:07 +0100 Subject: [PATCH v6 0/5] usb: host: dwc2: use driver model for PHY and CLOCK Message-ID: <20200310100912.28129-1-patrick.delaunay@st.com> In this serie I update the DWC2 host driver to use the device tree information and the associated PHY and CLOCK drivers when they are availables. V6 is minor update of the first patch of the serie; I update some clk stub to return success after Simon Goldschmidt remarks on V5: http://patchwork.ozlabs.org/project/uboot/list/?series=162791 I test the V4 of this serie on stm32mp157c-ev1 board, with PHY and CLK support (V5 was a minor update). The U-CLASS are provided by: - PHY by USBPHYC driver = ./drivers/phy/phy-stm32-usbphyc.c - CLOCK by RCC clock driver = drivers/clk/clk_stm32mp1.c - RESET by RCC reset driver = drivers/reset/stm32-reset.c And I activate the configuration +CONFIG_USB_DWC2=y PS: it is not the default configuration to avoid conflict with gadget driver To solve a binding issue, I also deactivate the gadget support: by default only one driver is bound to the usbotg_hs node with "snps,dwc2" compatible, and today it is the device one (the first in the driver list). I also need to deactivate hnp-srp support with: &usbotg_hs { /* need to disable ONLY for HOST support */ hnp-srp-disable; }; WARNING: OTG with device or host support is not correctly handle by DWC2 driver (see example for dynamic OTG role in DWC3 driver). The tests executed on the stm32mp157c-ev1 target: STM32MP> usb start starting USB... Bus usb-otg at 49000000: USB DWC2 Bus usbh-ehci at 5800d000: USB EHCI 1.00 scanning bus usb-otg at 49000000 for devices... 2 USB Device(s) found scanning bus usbh-ehci at 5800d000 for devices... 3 USB Device(s) found scanning usb for storage devices... 2 Storage Device(s) found STM32MP> usb tree USB device tree: 1 Hub (480 Mb/s, 0mA) | U-Boot Root Hub | +-2 Mass Storage (480 Mb/s, 300mA) Verbatim STORE N GO 070731C8ACD7EE97 1 Hub (480 Mb/s, 0mA) | u-boot EHCI Host Controller | +-2 Hub (480 Mb/s, 2mA) STM32MP> ls usb 0 4096 . 4096 .. 16384 lost+found 4096 record 1490212 xipImage 21058006 vmlinux STM32MP> load usb 0 0xC0000000 vmlinux 21058006 bytes read in 10851 ms (1.9 MiB/s) Changes in v6: - return success in stub for clk_free/clk_enable/clk_disable/ clk_enable_bulk/clk_disable_bulk Changes in v5: - use ERR_PTR in clk_get_parent() - force bulk->count = 0 in clk_get_bulk to avoid issue for next call of clk_enable_bulk / clk_enable_bulk - update commit message - inverse logic for -ENOENT test on generic_phy_get_by_index result - Add some comments Changes in v4: - Add stub for all functions using 'struct clk' or 'struct clk_bulk' after remarks on v3 Changes in v3: - Add stub for clk_disable_bulk Changes in v2: - update dev_err - update commit message - change dev_err to dev_dbg for PHY function call - treat dwc2_shutdown_phy error - add clk_disable_bulk in dwc2_usb_remove Patrick Delaunay (5): dm: clk: add stub when CONFIG_CLK is deactivated usb: host: dwc2: add phy support usb: host: dwc2: add clk support usb: host: dwc2: force reset assert usb: host: dwc2: add trace to have clean usb start drivers/usb/host/dwc2.c | 100 ++++++++++++++++++++++++++++++++++++++- include/clk.h | 102 +++++++++++++++++++++++++++++++++++----- 2 files changed, 188 insertions(+), 14 deletions(-)