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Date: Thu, 02 Jan 2014 17:20:12 +0100 From: Kamil Debski <k.debski@...sung.com> To: 'Kamil Debski' <k.debski@...sung.com>, linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org, linux-usb@...r.kernel.org, devicetree@...r.kernel.org, kishon@...com Cc: kyungmin.park@...sung.com, p.paneri@...sung.com, Tomasz Figa <t.figa@...sung.com>, Sylwester Nawrocki <s.nawrocki@...sung.com>, Marek Szyprowski <m.szyprowski@...sung.com>, gautam.vivek@...sung.com, mat.krawczuk@...il.com, yulgon.kim@...sung.com, av.tikhomirov@...sung.com, jg1.han@...sung.com, galak@...eaurora.org, matt.porter@...aro.org, tjakobi@...h.uni-bielefeld.de, stern@...land.harvard.edu Subject: RE: [PATCH v5 0/9] phy: Add new Exynos USB 2.0 PHY driver Hi Kishon, I wanted to ask about your comments to this patchset. As I mentioned there are two alternative version where the Exynos 4210 and 4212 support is merged in one file. I would be grateful if you had some time to look at the patchset and share your comments. Best wishes and happy new year! -- Kamil Debski Samsung R&D Institute Poland > From: Kamil Debski [mailto:k.debski@...sung.com] > Sent: Friday, December 20, 2013 2:24 PM > > Hi, > > This is the fifth version of the patchset. It adds a new Exynos USB 2.0 > PHY driver. The driver uses the Generic PHY Framework. > > I would like to thank everyone who contributed with comments and took > the time to read through the patches in the previous versions of this > patchset. > We had a lengthy discussion with Kishon about how the driver should > look like. > This patchset contains the updated version of my original idea, where > support for Exynos 4210 and 4212 is done in separate files. Kishon's > idea is to join these two into a single file. I have prepared two > alternative version which I will send soon after this patchset. > > Just like the fourth version this patch depends on: > [PATCH V11 1/3] ARM: dts: Add pmu sysreg node to exynos5250 and > exynos5420 dtsi files [1]. > > Best wishes, > Kamil Debski > > [1] - http://www.spinics.net/lists/linux-samsung-soc/msg24528.html > > ---------------- > Changes from v4: > 1) phy: core: Add an exported of_phy_get function > - the new exported function of_phy_get was changed to take the phy's > name as a > parameter instead of the index > 2) phy: core: Add devm_of_phy_get to phy-core > - fixes made in the comments to devm_of_phy_get > 3) phy: Add new Exynos USB PHY driver > - move the documentation from a new to an existing file - samsung- > phy.txt > - fix typos and uppercase hex addresses > - add more explanations to Kconfig (checkpatch still complains, but I > find it > hard to think what else could I add) > - add selects MFD_SYSCON as the driver needs it (Thank you, Tobias!) > - cleanup included headers in both *.c and .h files > - use BIT(x) macro instead of (1 << x) > - replaced HOST and DEV with PHY0 and PHY1 in phy-exynos4212-usb2.c, > the > registers are described as PHYx in the documentation hence the > decision to > leave the PHYx naming > - fixed typo in exynos4210_rate_to_clk reg -> *reg > - change hax_mode_switch and enabled type to bool > 4) usb: ehci-s5p: Change to use phy provided by the generic phy > framework > - Put the issue of phy->otg in order - since the new phy driver does > not provide > this field. With the new driver the switch between host and device is > done in > power_on of the respective host and device phys. > 5) usb: s3c-hsotg: Use the new Exynos USB phy driver with the generic > phy > framework > - fixed the example in the documentation > 6) phy: Add support for S5PV210 to the Exynos USB PHY driver > - include files cleanup > - use BIT(x) macro instead of (1 << x) > 7) phy: Add Exynos 5250 support to the Exynos USB 2.0 PHY driver > - include files cleanup > - use BIT(x) macro instead of (1 << x) > 8) dts: Add usb2phy to Exynos 4 > - no changes > 9) dts: Add usb2phy to Exynos 5250 > - no changes > > ---------------- > Changes from v3: > - using PMU and system registers indirectly via syscon > - change labelling > - change Kconfig name > - fixed typos/stray whitespace > - move of_phy_provider_register() to the end of probe > - add a regular error return code to the rate_to_clk functions > - cleanup code and remove unused code > - change struct names to avoid collisions > - add mechanism to support multiple phys by the ehci driver > > ---------------- > Changes from v2: > - rebase all patches to the usb-next branch > - fixes in the documentation file > - remove wrong entries in the phy node (ranges, and #address- & > #size-cells) > - add clocks and clock-names as required properites > - rephrase a few sentences > - fixes in the ehci-exynos.c file > - move phy_name variable next to phy in exynos_ehci_hcd > - remove otg from exynos_ehci_hcd as it was no longer used > - move devm_phy_get after the Exynos5440 skip_phy check > - fixes in the s3c-hsotg.c file > - cosmetic fixes (remove empty line that was wrongfully added) > - fixes in the main driver > - remove cpu_type in favour for a boolean flag matched with the > compatible > value > - rename files, structures, variables and Kconfig entires - change > from simple > "uphy" to "usb2_phy" > - fix multiline comments style > - simplify #ifdefs in of_device_id > - fix Kconfig description > - change dev_info to dev_dbg where reasonable > - cosmetic changes (remove wrongful blank lines) > - remove unnecessary reference counting > > ---------------- > Changes from v1: > - the changes include minor fixes of the hardware initialization of the > PHY > module > - some other minor fixes were introduced > > ---------------------- > Original cover letter: > > Hi, > > This patch adds a new drive for USB PHYs for Samsung SoCs. The driver > is using the Generic PHY Framework created by Kishon Vijay Abrahan I. > It can be found here https://lkml.org/lkml/2013/8/21/29. This patch > adds support to Exynos4 family of SoCs. Support for Exynos3 and Exynos5 > is planned to be added in the near future. > > I welcome your comments. > > ---------------------- > > [1] https://lkml.org/lkml/2013/8/21/29 > > Kamil Debski (8): > phy: core: Add an exported of_phy_get function > phy: core: Add devm_of_phy_get to phy-core > phy: Add new Exynos USB PHY driver > usb: ehci-s5p: Change to use phy provided by the generic phy > framework > usb: s3c-hsotg: Use the new Exynos USB phy driver with the generic > phy framework > phy: Add Exynos 5250 support to the Exynos USB 2.0 PHY driver > dts: Add usb2phy to Exynos 4 > dts: Add usb2phy to Exynos 5250 > > Mateusz Krawczuk (1): > phy: Add support for S5PV210 to the Exynos USB PHY driver > > .../devicetree/bindings/arm/samsung/pmu.txt | 2 + > .../devicetree/bindings/phy/samsung-phy.txt | 57 +++ > .../devicetree/bindings/usb/samsung-hsotg.txt | 4 + > Documentation/devicetree/bindings/usb/usb-ehci.txt | 35 ++ > arch/arm/boot/dts/exynos4.dtsi | 31 ++ > arch/arm/boot/dts/exynos4210.dtsi | 17 + > arch/arm/boot/dts/exynos4x12.dtsi | 17 + > arch/arm/boot/dts/exynos5250.dtsi | 33 +- > drivers/phy/Kconfig | 50 +++ > drivers/phy/Makefile | 5 + > drivers/phy/phy-core.c | 76 +++- > drivers/phy/phy-exynos4210-usb2.c | 257 > +++++++++++++ > drivers/phy/phy-exynos4212-usb2.c | 306 > +++++++++++++++ > drivers/phy/phy-exynos5250-usb2.c | 406 > ++++++++++++++++++++ > drivers/phy/phy-s5pv210-usb2.c | 199 ++++++++++ > drivers/phy/phy-samsung-usb2.c | 238 ++++++++++++ > drivers/phy/phy-samsung-usb2.h | 69 ++++ > drivers/usb/gadget/s3c-hsotg.c | 11 +- > drivers/usb/host/ehci-exynos.c | 97 +++-- > include/linux/phy/phy.h | 3 + > 20 files changed, 1853 insertions(+), 60 deletions(-) create mode > 100644 drivers/phy/phy-exynos4210-usb2.c create mode 100644 > drivers/phy/phy-exynos4212-usb2.c create mode 100644 drivers/phy/phy- > exynos5250-usb2.c create mode 100644 drivers/phy/phy-s5pv210-usb2.c > create mode 100644 drivers/phy/phy-samsung-usb2.c create mode 100644 > drivers/phy/phy-samsung-usb2.h > > -- > 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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