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2021-03-15phy: stm32: register usbphyc as clock provider of ck_usbo_48m clockAmelie Delaunay2-0/+66
ck_usbo_48m is generated by usbphyc PLL and used by OTG controller for Full-Speed use cases with dedicated Full-Speed transceiver. ck_usbo_48m is available as soon as the PLL is enabled. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20210208114659.15269-3-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-01-13phy: stm32: rework PLL Lock detectionAmelie Delaunay1-34/+54
USBPHYC has a register per phy to control and monitor the debug interface of the HS PHY through a digital debug access. With this register, it is possible to know if PLL Lock input to phy is high. That means the PLL is ready for HS operation. Instead of using an hard-coded delay after PLL enable and PLL disable, use this bit to ensure good operating of the HS PHY. Also use an atomic counter (n_pll_cons) to count the actual number of PLL consumers and get rid of stm32_usbphyc_has_one_phy_active. The boolean active in the usbphyc_phy structure is kept, because we need to know in remove if a phy_exit is required to properly disable the PLL. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20210105090525.23164-7-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-01-13phy: stm32: ensure phy are no more active when removing the driverAmelie Delaunay1-0/+6
To ensure a good balancing of regulators, and allow PLL disabling when the driver is removed, call stm32_usbphyc_phy_exit on each ports to set phys inactive and disable PLL. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20210105090525.23164-6-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-01-13phy: stm32: ensure pll is disabled before phys creationAmelie Delaunay1-2/+15
To ensure a good balancing of regulators, force PLL disable either by reset or by clearing the PLLEN bit. If waiting the powerdown pulse delay isn't enough, return -EPROBE_DEFER instead of polling the PLLEN bit, which will be low at the next probe. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20210105090525.23164-5-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-01-13phy: stm32: replace regulator_bulk* by multiple regulator_*Amelie Delaunay1-17/+52
Due to async_schedule_domain call in regulator_bulk_enable, scheduling while atomic bug can raise if regulator_bulk_enable is called under atomic context. To avoid this issue, this patch replaces all regulator_bulk* by regulator_ per regulators. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20210105090525.23164-4-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2021-01-13phy: stm32: manage 1v1 and 1v8 supplies at pll activation/deactivationAmelie Delaunay1-56/+46
PLL block requires to be powered with 1v1 and 1v8 supplies to catch ENABLE signal. Currently, supplies are managed through phy_ops .power_on/off, and PLL activation/deactivation is managed through phy_ops .init/exit. The sequence of phy_ops .power_on/.phy_init, .power_off/.exit is USB drivers dependent. To ensure a good behavior of the PLL, supplies have to be managed at PLL activation/deactivation. That means the supplies need to be put in usbphyc node and not in phy children nodes. Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Link: https://lore.kernel.org/r/20210105090525.23164-3-amelie.delaunay@foss.st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-11-16phy: stm32: defer probe for reset controllerAmelie Delaunay1-0/+4
Change stm32-usbphyc driver to defer its probe when the expected reset control has its probe operation deferred. Signed-off-by: Etienne Carriere <etienne.carriere@st.com> Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Link: https://lore.kernel.org/r/20201110102305.27205-2-amelie.delaunay@st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-11-16phy: stm32: don't print an error on probe deferralAmelie Delaunay1-5/+2
Change stm32-usbphyc driver to not print an error message when the device probe operation is deferred. Signed-off-by: Etienne Carriere <etienne.carriere@st.com> Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Link: https://lore.kernel.org/r/20201110130531.7610-1-amelie.delaunay@st.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-11-16phy: phy-stm32-usbphyc: convert to devm_platform_ioremap_resourceChunfeng Yun1-3/+1
Use devm_platform_ioremap_resource to simplify code Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Reviewed-by: Amelie Delaunay <amelie.delaunay@st.com> Link: https://lore.kernel.org/r/1604642930-29019-15-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-07-13phy: stm32: use NULL instead of zeroVinod Koul1-2/+2
devm_clk_get() and devm_reset_control_get() expect a const char *id for the last arg, but a value of zero was provided. This results in below sparse warning: drivers/phy/st/phy-stm32-usbphyc.c:330:42: warning: Using plain integer as NULL pointer drivers/phy/st/phy-stm32-usbphyc.c:343:52: warning: Using plain integer as NULL pointer Instead of zero, use NULL Reviewed-by: Amelie Delaunay <amelie.delaunay@st.com> Link: https://lore.kernel.org/r/20200708132809.265967-6-vkoul@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner4-20/+4
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-01treewide: fix typos of SPDX-License-IdentifierMasahiro Yamada1-1/+1
Prior to the adoption of SPDX, it was difficult for tools to determine the correct license due to incomplete or badly formatted license text. The SPDX solves this issue, assuming people can correctly spell "SPDX-License-Identifier" although this assumption is broken in some places. Since scripts/spdxcheck.py parses only lines that exactly matches to the correct tag, it cannot (should not) detect this kind of error. If the correct tag is missing, scripts/checkpatch.pl warns like this: WARNING: Missing or malformed SPDX-License-Identifier tag in line * So, people should notice it before the patch submission, but in reality broken tags sometimes slip in. The checkpatch warning is not useful for checking the committed files globally since large number of files still have no SPDX tag. Also, I am not sure about the legal effect when the SPDX tag is broken. Anyway, these typos are absolutely worth fixing. It is pretty easy to find suspicious lines by grep. $ git grep --not -e SPDX-License-Identifier --and -e SPDX- -- \ :^LICENSES :^scripts/spdxcheck.py :^*/license-rules.rst arch/arm/kernel/bugs.c:// SPDX-Identifier: GPL-2.0 drivers/phy/st/phy-stm32-usbphyc.c:// SPDX-Licence-Identifier: GPL-2.0 drivers/pinctrl/sh-pfc/pfc-r8a77980.c:// SPDX-Lincense-Identifier: GPL 2.0 lib/test_stackinit.c:// SPDX-Licenses: GPLv2 sound/soc/codecs/max9759.c:// SPDX-Licence-Identifier: GPL-2.0 Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner2-0/+2
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-20phy: stm32: fix usbphyc static checker and checkpatch warningsAmelie Delaunay1-5/+4
This patch fixes the following issues: * warning reported by checkpatch: WARNING: line over 80 characters #87: FILE: drivers/phy/st/phy-stm32-usbphyc.c:87: +static void stm32_usbphyc_get_pll_params(u32 clk_rate, struct pll_params *pll_params) * bug reported by static checker (Dan Carpenter): drivers/phy/st/phy-stm32-usbphyc.c:371 stm32_usbphyc_probe() error: uninitialized symbol 'i'. * unused stm32_usbphyc structure member: bool pll_enabled. * unnecessary extra line in stm32_usbphyc_of_xlate Fixes: 94c358da3a05 "phy: stm32: add support for STM32 USB PHY Controller (USBPHYC)" Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
2018-03-16phy: stm32: add support for STM32 USB PHY Controller (USBPHYC)Amelie Delaunay3-0/+476
This patch adds phy transceiver driver for STM32 USB PHY Controller (USBPHYC) that provides dual port High-Speed phy for OTG (single port) and EHCI/OHCI host controller (two ports). One port of the phy is shared between the two USB controllers through a UTMI+ switch. [fengguang.wu@intel.com: Make stm32_usbphyc_get_pll_params() to be static] Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
2017-06-01phy: Group vendor specific phy driversVivek Gautam6-0/+2058
Adding vendor specific directories in phy to group phy drivers under their respective vendor umbrella. Also updated the MAINTAINERS file to reflect the correct directory structure for phy drivers. Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org> Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: David S. Miller <davem@davemloft.net> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Chen-Yu Tsai <wens@csie.org> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Jaehoon Chung <jh80.chung@samsung.com> Cc: Stephen Boyd <stephen.boyd@linaro.org> Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-omap@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-usb@vger.kernel.org Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
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