[PATCH 000/102] Convert drivers to explicit reset API

[PATCH 000/102] Convert drivers to explicit reset API

[Philipp Zabel]

The reset control API has two modes: exclusive access, where the driver
expects to have full and immediate control over the state of the reset
line, and shared (clock-like) access, where drivers only request reset
deassertion while active, but don't care about the state of the reset line
while inactive.

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior.

This series converts all drivers that currently implicitly request
exclusive reset controls to the corresponding explicit API call. It is,
for the most part, generated from the following semantic patch:

@@
expression rstc, dev, id;
@@
-rstc = reset_control_get(dev, id);
+rstc = reset_control_get_exclusive(dev, id);
@@
expression rstc, dev, id;
@@
-rstc = reset_control_get_optional(dev, id);
+rstc = reset_control_get_optional_exclusive(dev, id);
@@
expression rstc, node, id;
@@
-rstc = of_reset_control_get(node, id);
+rstc = of_reset_control_get_exclusive(node, id);
@@
expression rstc, node, index;
@@
-rstc = of_reset_control_get_by_index(node, index);
+rstc = of_reset_control_get_exclusive_by_index(node, index);
@@
expression rstc, dev, id;
@@
-rstc = devm_reset_control_get(dev, id);
+rstc = devm_reset_control_get_exclusive(dev, id);
@@
expression rstc, dev, id;
@@
-rstc = devm_reset_control_get_optional(dev, id);
+rstc = devm_reset_control_get_optional_exclusive(dev, id);
@@
expression rstc, dev, index;
@@
-rstc = devm_reset_control_get_by_index(dev, index);
+rstc = devm_reset_control_get_exclusive_by_index(dev, index);

After all driver patches are applied, the temporary transition helpers
can be removed.

regards
Philipp

Philipp Zabel (102):
  ARM: rockchip: explicitly request exclusive reset control
  ARM: socfpga: explicitly request exclusive reset control
  MIPS: pci-mt7620: explicitly request exclusive reset control
  ahci: st: explicitly request exclusive reset control
  ata: sata_gemini: explicitly request exclusive reset control
  ata: ahci_tegra: explicitly request exclusive reset control
  bus: sunxi-rsb: explicitly request exclusive reset control
  bus: tegra-gmi: explicitly request exclusive reset control
  clk: sunxi: explicitly request exclusive reset control
  clk: tegra: explicitly request exclusive reset control
  clocksource/drivers/timer-stm32: explicitly request exclusive reset
    control
  clocksource/drivers/sun5i: explicitly request exclusive reset control
  crypto: rockchip: explicitly request exclusive reset control
  crypto: sun4i-ss - request exclusive reset control
  PM / devfreq: tegra: explicitly request exclusive reset control
  dmaengine: stm32-dma: explicitly request exclusive reset control
  dmaengine: sun6i: explicitly request exclusive reset control
  dmaengine: tegra-apb: explicitly request exclusive reset control
  drm: kirin: explicitly request exclusive reset control
  drm/nouveau/tegra: explicitly request exclusive reset control
  drm/rockchip: explicitly request exclusive reset control
  drm/sti: explicitly request exclusive reset control
  drm/stm: explicitly request exclusive reset control
  drm/sun4i: explicitly request exclusive reset control
  drm/tegra: explicitly request exclusive reset control
  gpu: host1x: explicitly request exclusive reset control
  i2c: mv64xxx: explicitly request exclusive reset control
  i2c: stm32f4: explicitly request exclusive reset control
  i2c: sun6i-pw2i: explicitly request exclusive reset control
  i2c: tegra: explicitly request exclusive reset control
  iio: adc: rockchip_saradc: explicitly request exclusive reset control
  iio: dac: stm32-dac-core: explicitly request exclusive reset control
  Input: tegra-kbc - request exclusive reset control
  coda: explicitly request exclusive reset control
  st-rc: explicitly request exclusive reset control
  stm32-dcmi: explicitly request exclusive reset control
  rc: sunxi-cir: explicitly request exclusive reset control
  mmc: dw_mmc: explicitly request exclusive reset control
  mmc: sdhci-st: explicitly request exclusive reset control
  mmc: sunxi: explicitly request exclusive reset control
  mmc: tegra: explicitly request exclusive reset control
  mtd: nand: sunxi: explicitly request exclusive reset control
  mtd: spi-nor: stm32-quadspi: explicitly request exclusive reset
    control
  net: dsa: mt7530: explicitly request exclusive reset control
  net: ethernet: hisi_femac: explicitly request exclusive reset control
  net: ethernet: hix5hd2_gmac: explicitly request exclusive reset
    control
  net: stmmac: explicitly request exclusive reset control
  net: stmmac: dwc-qos: explicitly request exclusive reset control
  ath10k: explicitly request exclusive reset control
  nvmem: lpc18xx-eeprom: explicitly request exclusive reset control
  PCI: dwc: pcie-qcom: explicitly request exclusive reset control
  PCI: imx6: explicitly request exclusive reset control
  PCI: tegra: explicitly request exclusive reset control
  PCI: rockchip: explicitly request exclusive reset control
  phy: berlin-usb: explicitly request exclusive reset control
  PCI: mediatek: explicitly request exclusive reset control
  phy: qcom-usb-hs: explicitly request exclusive reset control
  phy: rockchip-pcie: explicitly request exclusive reset control
  phy: rockchip-typec: explicitly request exclusive reset control
  phy: rockchip-usb: explicitly request exclusive reset control
  phy: sun4i-usb: explicitly request exclusive reset control
  phy: sun9i-usb: explicitly request exclusive reset control
  phy: tegra: explicitly request exclusive reset control
  phy: qcom-qmp: explicitly request exclusive reset control
  phy: qcom-qusb2: explicitly request exclusive reset control
  pinctrl: stm32: explicitly request exclusive reset control
  pinctrl: sunxi: explicitly request exclusive reset control
  pinctrl: tegra: explicitly request exclusive reset control
  pwm: hibvt: explicitly request exclusive reset control
  pwm: tegra: explicitly request exclusive reset control
  remoteproc/keystone: explicitly request exclusive reset control
  remoteproc: qcom: explicitly request exclusive reset control
  remoteproc: st: explicitly request exclusive reset control
  soc: mediatek: PMIC wrap: explicitly request exclusive reset control
  soc/tegra: pmc: explicitly request exclusive reset control
  spi: stm32: explicitly request exclusive reset control
  spi: sun6i: explicitly request exclusive reset control
  spi: tegra20-slink: explicitly request exclusive reset control
  spi: tegra114: explicitly request exclusive reset control
  spi: tegra20-sflash: explicitly request exclusive reset control
  staging: nvec: explicitly request exclusive reset control
  thermal: rockchip: explicitly request exclusive reset control
  thermal: tegra: explicitly request exclusive reset control
  serial: 8250_dw: explicitly request exclusive reset control
  serial: tegra: explicitly request exclusive reset control
  usb: chipidea: msm: explicitly request exclusive reset control
  usb: dwc2: explicitly request exclusive reset control
  usb: host: ehci-tegra: explicitly request exclusive reset control
  usb: host: xhci-tegra: explicitly request exclusive reset control
  usb: musb: sunxi: explicitly request exclusive reset control
  usb: phy: msm: explicitly request exclusive reset control
  usb: phy: qcom-8x16-usb: explicitly request exclusive reset control
  watchdog: asm9260: explicitly request exclusive reset control
  watchdog: mt7621: explicitly request exclusive reset control
  watchdog: rt2880: explicitly request exclusive reset control
  watchdog: zx2967: explicitly request exclusive reset control
  ASoC: img: explicitly request exclusive reset control
  ASoC: stm32: explicitly request exclusive reset control
  ASoC: sun4i: explicitly request exclusive reset control
  ASoC: tegra: explicitly request exclusive reset control
  Documentation: devres: add explicit exclusive/shared reset control
    request calls
  reset: finish transition to explicit exclusive reset control requests

 Documentation/driver-model/devres.txt              |  7 ++-
 arch/arm/mach-rockchip/platsmp.c                   |  2 +-
 arch/mips/pci/pci-mt7620.c                         |  2 +-
 drivers/ata/ahci_st.c                              |  6 +--
 drivers/ata/ahci_tegra.c                           |  8 ++--
 drivers/ata/sata_gemini.c                          |  4 +-
 drivers/bus/sunxi-rsb.c                            |  2 +-
 drivers/bus/tegra-gmi.c                            |  2 +-
 drivers/clk/sunxi/clk-sun9i-mmc.c                  |  2 +-
 drivers/clk/tegra/clk-dfll.c                       |  2 +-
 drivers/clocksource/timer-stm32.c                  |  2 +-
 drivers/clocksource/timer-sun5i.c                  |  2 +-
 drivers/crypto/rockchip/rk3288_crypto.c            |  2 +-
 drivers/crypto/sunxi-ss/sun4i-ss-core.c            |  3 +-
 drivers/devfreq/tegra-devfreq.c                    |  2 +-
 drivers/dma/stm32-dma.c                            |  2 +-
 drivers/dma/sun6i-dma.c                            |  2 +-
 drivers/dma/tegra20-apb-dma.c                      |  2 +-
 drivers/fpga/altera-hps2fpga.c                     |  3 +-
 drivers/gpu/drm/hisilicon/kirin/kirin_drm_ade.c    |  2 +-
 drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c |  2 +-
 drivers/gpu/drm/rockchip/analogix_dp-rockchip.c    |  2 +-
 drivers/gpu/drm/rockchip/cdn-dp-core.c             |  8 ++--
 drivers/gpu/drm/rockchip/dw-mipi-dsi.c             |  2 +-
 drivers/gpu/drm/rockchip/rockchip_drm_vop.c        |  4 +-
 drivers/gpu/drm/sti/sti_hdmi.c                     |  2 +-
 drivers/gpu/drm/sti/sti_hqvdp.c                    |  2 +-
 drivers/gpu/drm/sti/sti_tvout.c                    |  2 +-
 drivers/gpu/drm/stm/ltdc.c                         |  2 +-
 drivers/gpu/drm/sun4i/sun4i_backend.c              |  4 +-
 drivers/gpu/drm/sun4i/sun4i_tcon.c                 |  2 +-
 drivers/gpu/drm/sun4i/sun4i_tv.c                   |  2 +-
 drivers/gpu/drm/sun4i/sun6i_drc.c                  |  2 +-
 drivers/gpu/drm/sun4i/sun8i_mixer.c                |  2 +-
 drivers/gpu/drm/tegra/dc.c                         |  2 +-
 drivers/gpu/drm/tegra/dpaux.c                      |  3 +-
 drivers/gpu/drm/tegra/dsi.c                        |  2 +-
 drivers/gpu/drm/tegra/gr3d.c                       |  6 +--
 drivers/gpu/drm/tegra/hdmi.c                       |  2 +-
 drivers/gpu/drm/tegra/sor.c                        |  2 +-
 drivers/gpu/host1x/dev.c                           |  2 +-
 drivers/i2c/busses/i2c-mv64xxx.c                   |  2 +-
 drivers/i2c/busses/i2c-stm32f4.c                   |  2 +-
 drivers/i2c/busses/i2c-sun6i-p2wi.c                |  2 +-
 drivers/i2c/busses/i2c-tegra.c                     |  2 +-
 drivers/iio/adc/rockchip_saradc.c                  |  3 +-
 drivers/iio/dac/stm32-dac-core.c                   |  2 +-
 drivers/input/keyboard/tegra-kbc.c                 |  2 +-
 drivers/media/platform/coda/coda-common.c          |  3 +-
 drivers/media/platform/stm32/stm32-dcmi.c          |  2 +-
 drivers/media/rc/st_rc.c                           |  2 +-
 drivers/media/rc/sunxi-cir.c                       |  2 +-
 drivers/mmc/host/dw_mmc.c                          |  2 +-
 drivers/mmc/host/sdhci-st.c                        |  2 +-
 drivers/mmc/host/sdhci-tegra.c                     |  3 +-
 drivers/mmc/host/sunxi-mmc.c                       |  3 +-
 drivers/mtd/nand/sunxi_nand.c                      |  2 +-
 drivers/mtd/spi-nor/stm32-quadspi.c                |  2 +-
 drivers/net/dsa/mt7530.c                           |  3 +-
 drivers/net/ethernet/hisilicon/hisi_femac.c        |  4 +-
 drivers/net/ethernet/hisilicon/hix5hd2_gmac.c      |  6 +--
 .../ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c    |  2 +-
 drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c  |  3 +-
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |  4 +-
 drivers/net/wireless/ath/ath10k/ahb.c              | 15 ++++---
 drivers/nvmem/lpc18xx_eeprom.c                     |  2 +-
 drivers/pci/dwc/pci-imx6.c                         |  7 +--
 drivers/pci/dwc/pcie-qcom.c                        | 40 +++++++++--------
 drivers/pci/host/pci-tegra.c                       |  6 +--
 drivers/pci/host/pcie-mediatek.c                   |  2 +-
 drivers/pci/host/pcie-rockchip.c                   | 15 ++++---
 drivers/phy/allwinner/phy-sun4i-usb.c              |  2 +-
 drivers/phy/allwinner/phy-sun9i-usb.c              |  4 +-
 drivers/phy/marvell/phy-berlin-usb.c               |  2 +-
 drivers/phy/qualcomm/phy-qcom-qmp.c                |  4 +-
 drivers/phy/qualcomm/phy-qcom-qusb2.c              |  3 +-
 drivers/phy/qualcomm/phy-qcom-usb-hs.c             |  3 +-
 drivers/phy/rockchip/phy-rockchip-pcie.c           |  2 +-
 drivers/phy/rockchip/phy-rockchip-typec.c          |  6 +--
 drivers/phy/rockchip/phy-rockchip-usb.c            |  2 +-
 drivers/phy/tegra/xusb-tegra210.c                  |  4 +-
 drivers/phy/tegra/xusb.c                           |  2 +-
 drivers/pinctrl/stm32/pinctrl-stm32.c              |  2 +-
 drivers/pinctrl/sunxi/pinctrl-sun6i-a31-r.c        |  2 +-
 drivers/pinctrl/sunxi/pinctrl-sun8i-a23-r.c        |  2 +-
 drivers/pinctrl/tegra/pinctrl-tegra-xusb.c         |  2 +-
 drivers/pwm/pwm-hibvt.c                            |  2 +-
 drivers/pwm/pwm-tegra.c                            |  2 +-
 drivers/remoteproc/keystone_remoteproc.c           |  2 +-
 drivers/remoteproc/qcom_q6v5_pil.c                 |  3 +-
 drivers/remoteproc/st_remoteproc.c                 |  6 ++-
 drivers/reset/core.c                               |  2 +-
 drivers/soc/mediatek/mtk-pmic-wrap.c               |  5 ++-
 drivers/soc/tegra/pmc.c                            |  2 +-
 drivers/spi/spi-stm32.c                            |  2 +-
 drivers/spi/spi-sun6i.c                            |  2 +-
 drivers/spi/spi-tegra114.c                         |  2 +-
 drivers/spi/spi-tegra20-sflash.c                   |  2 +-
 drivers/spi/spi-tegra20-slink.c                    |  2 +-
 drivers/staging/nvec/nvec.c                        |  2 +-
 drivers/thermal/rockchip_thermal.c                 |  3 +-
 drivers/thermal/tegra/soctherm.c                   |  3 +-
 drivers/tty/serial/8250/8250_dw.c                  |  2 +-
 drivers/tty/serial/serial-tegra.c                  |  2 +-
 drivers/usb/chipidea/ci_hdrc_msm.c                 |  2 +-
 drivers/usb/dwc2/platform.c                        |  3 +-
 drivers/usb/host/ehci-tegra.c                      |  5 ++-
 drivers/usb/host/xhci-tegra.c                      |  6 ++-
 drivers/usb/musb/sunxi.c                           |  2 +-
 drivers/usb/phy/phy-msm-usb.c                      |  4 +-
 drivers/usb/phy/phy-qcom-8x16-usb.c                |  2 +-
 drivers/watchdog/asm9260_wdt.c                     |  2 +-
 drivers/watchdog/mt7621_wdt.c                      |  2 +-
 drivers/watchdog/rt2880_wdt.c                      |  2 +-
 drivers/watchdog/zx2967_wdt.c                      |  2 +-
 include/linux/reset.h                              | 50 ----------------------
 sound/soc/img/img-i2s-in.c                         |  2 +-
 sound/soc/img/img-i2s-out.c                        |  2 +-
 sound/soc/img/img-parallel-out.c                   |  2 +-
 sound/soc/img/img-spdif-in.c                       |  2 +-
 sound/soc/img/img-spdif-out.c                      |  2 +-
 sound/soc/stm/stm32_i2s.c                          |  2 +-
 sound/soc/stm/stm32_sai.c                          |  2 +-
 sound/soc/stm/stm32_spdifrx.c                      |  2 +-
 sound/soc/sunxi/sun4i-codec.c                      |  3 +-
 sound/soc/sunxi/sun4i-i2s.c                        |  2 +-
 sound/soc/sunxi/sun4i-spdif.c                      |  3 +-
 sound/soc/tegra/tegra30_ahub.c                     |  4 +-
 128 files changed, 226 insertions(+), 235 deletions(-)

-- 
2.11.0

Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Emilio López" <emilio@elopez.com.ar>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Alan Tull <atull@kernel.org>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Bin Liu <b-liu@ti.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Chen Feng <puck.chen@hisilicon.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Corentin Labbe <clabbe.montjoie@gmail.com>
Cc: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: David Airlie <airlied@linux.ie>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Joachim Eastwood <manabian@gmail.com>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Jon Hunter <jonathanh@nvidia.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Kalle Valo <kvalo@qca.qualcomm.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Marc Dietrich <marvin24@gmx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: Mathias Nyman <mathias.nyman@intel.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Moritz Fischer <moritz.fischer@ettus.com>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Peter Chen <Peter.Chen@nxp.com>
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
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Cc: Rakesh Iyer <riyer@nvidia.com>
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Cc: Zhang Rui <rui.zhang@intel.com>
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[PATCH 076/102] spi: stm32: explicitly request exclusive reset control

[Philipp Zabel]

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Mark Brown <broonie@kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: linux-spi@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 drivers/spi/spi-stm32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 75644bcd938b6..680cdf5495061 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -1132,7 +1132,7 @@ static int stm32_spi_probe(struct platform_device *pdev)
 		goto err_master_put;
 	}
 
-	spi->rst = devm_reset_control_get(&pdev->dev, NULL);
+	spi->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (!IS_ERR(spi->rst)) {
 		reset_control_assert(spi->rst);
 		udelay(2);
-- 
2.11.0

[PATCH 077/102] spi: sun6i: explicitly request exclusive reset control

[Philipp Zabel]

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Cc: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: Philipp Zabel <p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/spi/spi-sun6i.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c
index 03a773a9531a9..fb38234249a80 100644
--- a/drivers/spi/spi-sun6i.c
+++ b/drivers/spi/spi-sun6i.c
@@ -502,7 +502,7 @@ static int sun6i_spi_probe(struct platform_device *pdev)
 
 	init_completion(&sspi->done);
 
-	sspi->rstc = devm_reset_control_get(&pdev->dev, NULL);
+	sspi->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (IS_ERR(sspi->rstc)) {
 		dev_err(&pdev->dev, "Couldn't get reset controller\n");
 		ret = PTR_ERR(sspi->rstc);
-- 
2.11.0

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[PATCH 078/102] spi: tegra20-slink: explicitly request exclusive reset control

[Philipp Zabel]

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Jonathan Hunter <jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: Philipp Zabel <p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/spi/spi-tegra20-slink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 0c06ce424210a..3e12d5f87ee44 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -1081,7 +1081,7 @@ static int tegra_slink_probe(struct platform_device *pdev)
 		goto exit_free_irq;
 	}
 
-	tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+	tspi->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
 	if (IS_ERR(tspi->rst)) {
 		dev_err(&pdev->dev, "can not get reset\n");
 		ret = PTR_ERR(tspi->rst);
-- 
2.11.0

[PATCH 079/102] spi: tegra114: explicitly request exclusive reset control

[Philipp Zabel]

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Jonathan Hunter <jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: Philipp Zabel <p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/spi/spi-tegra114.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index 08012ae5aa66e..44550182a4a36 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -1083,7 +1083,7 @@ static int tegra_spi_probe(struct platform_device *pdev)
 		goto exit_free_irq;
 	}
 
-	tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+	tspi->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
 	if (IS_ERR(tspi->rst)) {
 		dev_err(&pdev->dev, "can not get reset\n");
 		ret = PTR_ERR(tspi->rst);
-- 
2.11.0

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[PATCH 080/102] spi: tegra20-sflash: explicitly request exclusive reset control

[Philipp Zabel]

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Laxman Dewangan <ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Jonathan Hunter <jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Signed-off-by: Philipp Zabel <p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/spi/spi-tegra20-sflash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index 2c797ee2664de..22893a7e0aa0e 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -485,7 +485,7 @@ static int tegra_sflash_probe(struct platform_device *pdev)
 		goto exit_free_irq;
 	}
 
-	tsd->rst = devm_reset_control_get(&pdev->dev, "spi");
+	tsd->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
 	if (IS_ERR(tsd->rst)) {
 		dev_err(&pdev->dev, "can not get reset\n");
 		ret = PTR_ERR(tsd->rst);
-- 
2.11.0

--
To unsubscribe from this list: send the line "unsubscribe linux-spi" in
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Applied "spi: tegra20-sflash: explicitly request exclusive reset control" to the spi tree

[Mark Brown]

The patch

   spi: tegra20-sflash: explicitly request exclusive reset control

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From e60dfe0782f251bb529f233e259dffdc8d786624 Mon Sep 17 00:00:00 2001
From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Wed, 19 Jul 2017 17:26:24 +0200
Subject: [PATCH] spi: tegra20-sflash: explicitly request exclusive reset
 control

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: linux-spi@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-tegra20-sflash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index 2c797ee2664d..22893a7e0aa0 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -485,7 +485,7 @@ static int tegra_sflash_probe(struct platform_device *pdev)
 		goto exit_free_irq;
 	}
 
-	tsd->rst = devm_reset_control_get(&pdev->dev, "spi");
+	tsd->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
 	if (IS_ERR(tsd->rst)) {
 		dev_err(&pdev->dev, "can not get reset\n");
 		ret = PTR_ERR(tsd->rst);
-- 
2.13.2

Applied "spi: tegra114: explicitly request exclusive reset control" to the spi tree

[Mark Brown]

The patch

   spi: tegra114: explicitly request exclusive reset control

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d006edb4202fc8160e7b5ba10c264b153e1f3e2d Mon Sep 17 00:00:00 2001
From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Wed, 19 Jul 2017 17:26:23 +0200
Subject: [PATCH] spi: tegra114: explicitly request exclusive reset control

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: linux-spi@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-tegra114.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-tegra114.c b/drivers/spi/spi-tegra114.c
index 08012ae5aa66..44550182a4a3 100644
--- a/drivers/spi/spi-tegra114.c
+++ b/drivers/spi/spi-tegra114.c
@@ -1083,7 +1083,7 @@ static int tegra_spi_probe(struct platform_device *pdev)
 		goto exit_free_irq;
 	}
 
-	tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+	tspi->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
 	if (IS_ERR(tspi->rst)) {
 		dev_err(&pdev->dev, "can not get reset\n");
 		ret = PTR_ERR(tspi->rst);
-- 
2.13.2

Applied "spi: tegra20-slink: explicitly request exclusive reset control" to the spi tree

[Mark Brown]

The patch

   spi: tegra20-slink: explicitly request exclusive reset control

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 73b32756cec3128882165bd845956fe467a23ad4 Mon Sep 17 00:00:00 2001
From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Wed, 19 Jul 2017 17:26:22 +0200
Subject: [PATCH] spi: tegra20-slink: explicitly request exclusive reset
 control

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: linux-spi@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-tegra20-slink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 0c06ce424210..3e12d5f87ee4 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -1081,7 +1081,7 @@ static int tegra_slink_probe(struct platform_device *pdev)
 		goto exit_free_irq;
 	}
 
-	tspi->rst = devm_reset_control_get(&pdev->dev, "spi");
+	tspi->rst = devm_reset_control_get_exclusive(&pdev->dev, "spi");
 	if (IS_ERR(tspi->rst)) {
 		dev_err(&pdev->dev, "can not get reset\n");
 		ret = PTR_ERR(tspi->rst);
-- 
2.13.2

Applied "spi: sun6i: explicitly request exclusive reset control" to the spi tree

[Mark Brown]

The patch

   spi: sun6i: explicitly request exclusive reset control

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 36bc7491f9558efef9a678f7d2555b3ecafd6d82 Mon Sep 17 00:00:00 2001
From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Wed, 19 Jul 2017 17:26:21 +0200
Subject: [PATCH] spi: sun6i: explicitly request exclusive reset control

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Mark Brown <broonie@kernel.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: linux-spi@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-sun6i.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c
index 03a773a9531a..fb38234249a8 100644
--- a/drivers/spi/spi-sun6i.c
+++ b/drivers/spi/spi-sun6i.c
@@ -502,7 +502,7 @@ static int sun6i_spi_probe(struct platform_device *pdev)
 
 	init_completion(&sspi->done);
 
-	sspi->rstc = devm_reset_control_get(&pdev->dev, NULL);
+	sspi->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (IS_ERR(sspi->rstc)) {
 		dev_err(&pdev->dev, "Couldn't get reset controller\n");
 		ret = PTR_ERR(sspi->rstc);
-- 
2.13.2

Applied "spi: stm32: explicitly request exclusive reset control" to the spi tree

[Mark Brown]

The patch

   spi: stm32: explicitly request exclusive reset control

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d5e9a4a433f7d082538268501fa684ada2c76552 Mon Sep 17 00:00:00 2001
From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Wed, 19 Jul 2017 17:26:20 +0200
Subject: [PATCH] spi: stm32: explicitly request exclusive reset control

Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: Mark Brown <broonie@kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: linux-spi@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-stm32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 75644bcd938b..680cdf549506 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -1132,7 +1132,7 @@ static int stm32_spi_probe(struct platform_device *pdev)
 		goto err_master_put;
 	}
 
-	spi->rst = devm_reset_control_get(&pdev->dev, NULL);
+	spi->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (!IS_ERR(spi->rst)) {
 		reset_control_assert(spi->rst);
 		udelay(2);
-- 
2.13.2

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Thomas Petazzoni]

Hello,

On Wed, 19 Jul 2017 17:25:04 +0200, Philipp Zabel wrote:
> The reset control API has two modes: exclusive access, where the driver
> expects to have full and immediate control over the state of the reset
> line, and shared (clock-like) access, where drivers only request reset
> deassertion while active, but don't care about the state of the reset line
> while inactive.
> 
> Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
> reset lines") started to transition the reset control request API calls
> to explicitly state whether the driver needs exclusive or shared reset
> control behavior.
> 
> This series converts all drivers that currently implicitly request
> exclusive reset controls to the corresponding explicit API call. It is,
> for the most part, generated from the following semantic patch:
> 
> @@
> expression rstc, dev, id;
> @@
> -rstc = reset_control_get(dev, id);
> +rstc = reset_control_get_exclusive(dev, id);

I don't know if it has been discussed in the past, so forgive me if it
has been. Have you considered adding a "int flags" argument to the
existing reset_control_get_*() functions, rather than introducing
separate exclusive variants ?

Indeed, with a "int flags" argument you could in the future add more
variants/behaviors without actually multiplying the number of
functions. Something like the "flags" argument for request_irq() for
example.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Maxime Ripard]

[-- Attachment #1.1: Type: text/plain, Size: 8914 bytes --]

On Wed, Jul 19, 2017 at 05:25:04PM +0200, Philipp Zabel wrote:
> The reset control API has two modes: exclusive access, where the driver
> expects to have full and immediate control over the state of the reset
> line, and shared (clock-like) access, where drivers only request reset
> deassertion while active, but don't care about the state of the reset line
> while inactive.
> 
> Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
> reset lines") started to transition the reset control request API calls
> to explicitly state whether the driver needs exclusive or shared reset
> control behavior.
> 
> This series converts all drivers that currently implicitly request
> exclusive reset controls to the corresponding explicit API call. It is,
> for the most part, generated from the following semantic patch:
> 
> @@
> expression rstc, dev, id;
> @@
> -rstc = reset_control_get(dev, id);
> +rstc = reset_control_get_exclusive(dev, id);
> @@
> expression rstc, dev, id;
> @@
> -rstc = reset_control_get_optional(dev, id);
> +rstc = reset_control_get_optional_exclusive(dev, id);
> @@
> expression rstc, node, id;
> @@
> -rstc = of_reset_control_get(node, id);
> +rstc = of_reset_control_get_exclusive(node, id);
> @@
> expression rstc, node, index;
> @@
> -rstc = of_reset_control_get_by_index(node, index);
> +rstc = of_reset_control_get_exclusive_by_index(node, index);
> @@
> expression rstc, dev, id;
> @@
> -rstc = devm_reset_control_get(dev, id);
> +rstc = devm_reset_control_get_exclusive(dev, id);
> @@
> expression rstc, dev, id;
> @@
> -rstc = devm_reset_control_get_optional(dev, id);
> +rstc = devm_reset_control_get_optional_exclusive(dev, id);
> @@
> expression rstc, dev, index;
> @@
> -rstc = devm_reset_control_get_by_index(dev, index);
> +rstc = devm_reset_control_get_exclusive_by_index(dev, index);
> 
> After all driver patches are applied, the temporary transition helpers
> can be removed.
> 
> regards
> Philipp
> 
> Philipp Zabel (102):
>   ARM: rockchip: explicitly request exclusive reset control
>   ARM: socfpga: explicitly request exclusive reset control
>   MIPS: pci-mt7620: explicitly request exclusive reset control
>   ahci: st: explicitly request exclusive reset control
>   ata: sata_gemini: explicitly request exclusive reset control
>   ata: ahci_tegra: explicitly request exclusive reset control
>   bus: sunxi-rsb: explicitly request exclusive reset control
>   bus: tegra-gmi: explicitly request exclusive reset control
>   clk: sunxi: explicitly request exclusive reset control
>   clk: tegra: explicitly request exclusive reset control
>   clocksource/drivers/timer-stm32: explicitly request exclusive reset
>     control
>   clocksource/drivers/sun5i: explicitly request exclusive reset control
>   crypto: rockchip: explicitly request exclusive reset control
>   crypto: sun4i-ss - request exclusive reset control
>   PM / devfreq: tegra: explicitly request exclusive reset control
>   dmaengine: stm32-dma: explicitly request exclusive reset control
>   dmaengine: sun6i: explicitly request exclusive reset control
>   dmaengine: tegra-apb: explicitly request exclusive reset control
>   drm: kirin: explicitly request exclusive reset control
>   drm/nouveau/tegra: explicitly request exclusive reset control
>   drm/rockchip: explicitly request exclusive reset control
>   drm/sti: explicitly request exclusive reset control
>   drm/stm: explicitly request exclusive reset control
>   drm/sun4i: explicitly request exclusive reset control
>   drm/tegra: explicitly request exclusive reset control
>   gpu: host1x: explicitly request exclusive reset control
>   i2c: mv64xxx: explicitly request exclusive reset control
>   i2c: stm32f4: explicitly request exclusive reset control
>   i2c: sun6i-pw2i: explicitly request exclusive reset control
>   i2c: tegra: explicitly request exclusive reset control
>   iio: adc: rockchip_saradc: explicitly request exclusive reset control
>   iio: dac: stm32-dac-core: explicitly request exclusive reset control
>   Input: tegra-kbc - request exclusive reset control
>   coda: explicitly request exclusive reset control
>   st-rc: explicitly request exclusive reset control
>   stm32-dcmi: explicitly request exclusive reset control
>   rc: sunxi-cir: explicitly request exclusive reset control
>   mmc: dw_mmc: explicitly request exclusive reset control
>   mmc: sdhci-st: explicitly request exclusive reset control
>   mmc: sunxi: explicitly request exclusive reset control
>   mmc: tegra: explicitly request exclusive reset control
>   mtd: nand: sunxi: explicitly request exclusive reset control
>   mtd: spi-nor: stm32-quadspi: explicitly request exclusive reset
>     control
>   net: dsa: mt7530: explicitly request exclusive reset control
>   net: ethernet: hisi_femac: explicitly request exclusive reset control
>   net: ethernet: hix5hd2_gmac: explicitly request exclusive reset
>     control
>   net: stmmac: explicitly request exclusive reset control
>   net: stmmac: dwc-qos: explicitly request exclusive reset control
>   ath10k: explicitly request exclusive reset control
>   nvmem: lpc18xx-eeprom: explicitly request exclusive reset control
>   PCI: dwc: pcie-qcom: explicitly request exclusive reset control
>   PCI: imx6: explicitly request exclusive reset control
>   PCI: tegra: explicitly request exclusive reset control
>   PCI: rockchip: explicitly request exclusive reset control
>   phy: berlin-usb: explicitly request exclusive reset control
>   PCI: mediatek: explicitly request exclusive reset control
>   phy: qcom-usb-hs: explicitly request exclusive reset control
>   phy: rockchip-pcie: explicitly request exclusive reset control
>   phy: rockchip-typec: explicitly request exclusive reset control
>   phy: rockchip-usb: explicitly request exclusive reset control
>   phy: sun4i-usb: explicitly request exclusive reset control
>   phy: sun9i-usb: explicitly request exclusive reset control
>   phy: tegra: explicitly request exclusive reset control
>   phy: qcom-qmp: explicitly request exclusive reset control
>   phy: qcom-qusb2: explicitly request exclusive reset control
>   pinctrl: stm32: explicitly request exclusive reset control
>   pinctrl: sunxi: explicitly request exclusive reset control
>   pinctrl: tegra: explicitly request exclusive reset control
>   pwm: hibvt: explicitly request exclusive reset control
>   pwm: tegra: explicitly request exclusive reset control
>   remoteproc/keystone: explicitly request exclusive reset control
>   remoteproc: qcom: explicitly request exclusive reset control
>   remoteproc: st: explicitly request exclusive reset control
>   soc: mediatek: PMIC wrap: explicitly request exclusive reset control
>   soc/tegra: pmc: explicitly request exclusive reset control
>   spi: stm32: explicitly request exclusive reset control
>   spi: sun6i: explicitly request exclusive reset control
>   spi: tegra20-slink: explicitly request exclusive reset control
>   spi: tegra114: explicitly request exclusive reset control
>   spi: tegra20-sflash: explicitly request exclusive reset control
>   staging: nvec: explicitly request exclusive reset control
>   thermal: rockchip: explicitly request exclusive reset control
>   thermal: tegra: explicitly request exclusive reset control
>   serial: 8250_dw: explicitly request exclusive reset control
>   serial: tegra: explicitly request exclusive reset control
>   usb: chipidea: msm: explicitly request exclusive reset control
>   usb: dwc2: explicitly request exclusive reset control
>   usb: host: ehci-tegra: explicitly request exclusive reset control
>   usb: host: xhci-tegra: explicitly request exclusive reset control
>   usb: musb: sunxi: explicitly request exclusive reset control
>   usb: phy: msm: explicitly request exclusive reset control
>   usb: phy: qcom-8x16-usb: explicitly request exclusive reset control
>   watchdog: asm9260: explicitly request exclusive reset control
>   watchdog: mt7621: explicitly request exclusive reset control
>   watchdog: rt2880: explicitly request exclusive reset control
>   watchdog: zx2967: explicitly request exclusive reset control
>   ASoC: img: explicitly request exclusive reset control
>   ASoC: stm32: explicitly request exclusive reset control
>   ASoC: sun4i: explicitly request exclusive reset control
>   ASoC: tegra: explicitly request exclusive reset control
>   Documentation: devres: add explicit exclusive/shared reset control
>     request calls
>   reset: finish transition to explicit exclusive reset control requests


For all sunxi patches:
Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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Re: [PATCH 000/102] Convert drivers to explicit reset API

[Greg Kroah-Hartman]

On Wed, Jul 19, 2017 at 05:25:04PM +0200, Philipp Zabel wrote:
> The reset control API has two modes: exclusive access, where the driver
> expects to have full and immediate control over the state of the reset
> line, and shared (clock-like) access, where drivers only request reset
> deassertion while active, but don't care about the state of the reset line
> while inactive.
> 
> Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
> reset lines") started to transition the reset control request API calls
> to explicitly state whether the driver needs exclusive or shared reset
> control behavior.
> 
> This series converts all drivers that currently implicitly request
> exclusive reset controls to the corresponding explicit API call. It is,
> for the most part, generated from the following semantic patch:

Hey, I'm all for large api changes, but this really seems ackward, isn't
there a "better" way to do this?

Why not, as you say the "implicit" request is exclusive, just leave
everything alone and state that the "reset_control_get()" call is
exclusive and make the shared one the "odd" usage as that seems to not
be the normal case.

That should be a much smaller patch right?

That way you don't break everything here, and require 100+ patches to
just change the name of a function from one to another and do nothing
else.

thanks,

greg k-h

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Philipp Zabel]

Hi Greg,

The patches in this series are completely independent of each other, and
I would like the subsystem maintainers to apply them at their own
leisure.
Well, except for the last one, which I will apply only after there are
no more users of the transition helpers.

On Thu, 2017-07-20 at 10:11 +0200, Greg Kroah-Hartman wrote:
> On Wed, Jul 19, 2017 at 05:25:04PM +0200, Philipp Zabel wrote:
> > The reset control API has two modes: exclusive access, where the driver
> > expects to have full and immediate control over the state of the reset
> > line, and shared (clock-like) access, where drivers only request reset
> > deassertion while active, but don't care about the state of the reset line
> > while inactive.
> > 
> > Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
> > reset lines") started to transition the reset control request API calls
> > to explicitly state whether the driver needs exclusive or shared reset
> > control behavior.
> > 
> > This series converts all drivers that currently implicitly request
> > exclusive reset controls to the corresponding explicit API call. It is,
> > for the most part, generated from the following semantic patch:
> 
> Hey, I'm all for large api changes, but this really seems ackward, isn't
> there a "better" way to do this?

It is a bit awkward. I am sorry I haven't done this earlier. Quite a few
new drivers started using the old API after the explicit requests were
introduced last year.

> Why not, as you say the "implicit" request is exclusive, just leave
> everything alone and state that the "reset_control_get()" call is
> exclusive 

I think it is better to let the drivers explicitly state what they
expect from the API, and using reset_control_get_exclusive vs _shared
helps driver developers to make a conscious decision.

Further, the implicit API call predates shared reset support, so it is
not clear that all of the old users really need exclusive control.
A few drivers have been switched to the shared API already.

> and make the shared one the "odd" usage as that seems to not
> be the normal case.

I am not sure, there have been people arguing that the "clock-like" case
really is the common one. I suppose some of those drivers touched by the
100 patches in this series could also be changed to shared. But I don't
dare to make this decision for each of them.

> That should be a much smaller patch right?
> 
> That way you don't break everything here, and require 100+ patches to
> just change the name of a function from one to another and do nothing
> else.

I don't break anything here, and I'm absolutely fine with squashing
patches together per subsystem where that is preferable.

regards
Philipp

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Philipp Zabel]

Hi Thomas,

On Wed, 2017-07-19 at 21:15 +0200, Thomas Petazzoni wrote:
> Hello,
> 
> On Wed, 19 Jul 2017 17:25:04 +0200, Philipp Zabel wrote:
> > The reset control API has two modes: exclusive access, where the driver
> > expects to have full and immediate control over the state of the reset
> > line, and shared (clock-like) access, where drivers only request reset
> > deassertion while active, but don't care about the state of the reset line
> > while inactive.
> > 
> > Commit a53e35db70d1 ("reset: Ensure drivers are explicit when requesting
> > reset lines") started to transition the reset control request API calls
> > to explicitly state whether the driver needs exclusive or shared reset
> > control behavior.
> > 
> > This series converts all drivers that currently implicitly request
> > exclusive reset controls to the corresponding explicit API call. It is,
> > for the most part, generated from the following semantic patch:
> > 
> > @@
> > expression rstc, dev, id;
> > @@
> > -rstc = reset_control_get(dev, id);
> > +rstc = reset_control_get_exclusive(dev, id);
> 
> I don't know if it has been discussed in the past, so forgive me if it
> has been. Have you considered adding a "int flags" argument to the
> existing reset_control_get_*() functions, rather than introducing
> separate exclusive variants ?
> 
> Indeed, with a "int flags" argument you could in the future add more
> variants/behaviors without actually multiplying the number of
> functions. Something like the "flags" argument for request_irq() for
> example.

I can't find the discussion right now, but I remember we had talked
about this in the past.
Behind the scenes, all the inline API functions already call common
entry points with flags (well, currently separate bool parameters for
shared and optional).
One reason against exposing those as an int flags in the user facing API
is the possibility to accidentally provide a wrong value.

regards
Philipp

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Thomas Petazzoni]

Hello,

On Thu, 20 Jul 2017 11:36:55 +0200, Philipp Zabel wrote:

> > I don't know if it has been discussed in the past, so forgive me if it
> > has been. Have you considered adding a "int flags" argument to the
> > existing reset_control_get_*() functions, rather than introducing
> > separate exclusive variants ?
> > 
> > Indeed, with a "int flags" argument you could in the future add more
> > variants/behaviors without actually multiplying the number of
> > functions. Something like the "flags" argument for request_irq() for
> > example.  
> 
> I can't find the discussion right now, but I remember we had talked
> about this in the past.
> Behind the scenes, all the inline API functions already call common
> entry points with flags (well, currently separate bool parameters for
> shared and optional).
> One reason against exposing those as an int flags in the user facing API
> is the possibility to accidentally provide a wrong value.

This is a quite strange argument. You could also accidentally use the
wrong variant of the function, just like you could use the wrong flag.

Once again, the next time you have another parameter for those reset
functions, beyond the exclusive/shared variant, you will multiply again
by two the number of functions ? You already have the  exclusive/shared
and optional/mandatory variants, so 4 variants. When you'll add a new
parameter, you'll have 8 variants. Doesn't seem really good.

What about reset_control_get(struct device *, const char *, int flags)
to replace all those variants ?

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Philipp Zabel]

Hi Thomas,

On Thu, 2017-07-20 at 12:36 +0200, Thomas Petazzoni wrote:
> Hello,
> 
> On Thu, 20 Jul 2017 11:36:55 +0200, Philipp Zabel wrote:
> 
> > > I don't know if it has been discussed in the past, so forgive me if it
> > > has been. Have you considered adding a "int flags" argument to the
> > > existing reset_control_get_*() functions, rather than introducing
> > > separate exclusive variants ?
> > > 
> > > Indeed, with a "int flags" argument you could in the future add more
> > > variants/behaviors without actually multiplying the number of
> > > functions. Something like the "flags" argument for request_irq() for
> > > example.  
> > 
> > I can't find the discussion right now, but I remember we had talked
> > about this in the past.
> > Behind the scenes, all the inline API functions already call common
> > entry points with flags (well, currently separate bool parameters for
> > shared and optional).
> > One reason against exposing those as an int flags in the user facing API
> > is the possibility to accidentally provide a wrong value.
> 
> This is a quite strange argument. You could also accidentally use the
> wrong variant of the function, just like you could use the wrong flag.

You can't accidentally use no flag at all or a completely bogus value
with the "plethora of inline functions" variant.

> Once again, the next time you have another parameter for those reset
> functions, beyond the exclusive/shared variant, you will multiply again
> by two the number of functions ? You already have the  exclusive/shared
> and optional/mandatory variants, so 4 variants. When you'll add a new
> parameter, you'll have 8 variants. Doesn't seem really good.

I'd rather avoid adding more variants, if possible. The complexity
increases regardless of whether the API is expressed as a bunch of
functions or as a single function with a bunch of flags.

> What about reset_control_get(struct device *, const char *, int flags)
> to replace all those variants ?

While I like how this looks, unfortunately (devm_)reset_control_get
already exists without the flags, so we can't change to that with a
gentle transition.

regards
Philipp

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Heiko Stuebner]

Hi,

>   crypto: rockchip: explicitly request exclusive reset control
>   iio: adc: rockchip_saradc: explicitly request exclusive reset control
>   PCI: rockchip: explicitly request exclusive reset control
>   phy: rockchip-pcie: explicitly request exclusive reset control
>   phy: rockchip-typec: explicitly request exclusive reset control
>   phy: rockchip-usb: explicitly request exclusive reset control
>   thermal: rockchip: explicitly request exclusive reset control

for the driver-related Rockchip changes

Acked-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Heiko Stuebner]

Hi,

>   crypto: rockchip: explicitly request exclusive reset control
>   iio: adc: rockchip_saradc: explicitly request exclusive reset control
>   PCI: rockchip: explicitly request exclusive reset control
>   phy: rockchip-pcie: explicitly request exclusive reset control
>   phy: rockchip-typec: explicitly request exclusive reset control
>   phy: rockchip-usb: explicitly request exclusive reset control
>   thermal: rockchip: explicitly request exclusive reset control

for the driver-related Rockchip changes

Acked-by: Heiko Stuebner <heiko@sntech.de>

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Heiko Stuebner]

Hi,

>   crypto: rockchip: explicitly request exclusive reset control
>   iio: adc: rockchip_saradc: explicitly request exclusive reset control
>   PCI: rockchip: explicitly request exclusive reset control
>   phy: rockchip-pcie: explicitly request exclusive reset control
>   phy: rockchip-typec: explicitly request exclusive reset control
>   phy: rockchip-usb: explicitly request exclusive reset control
>   thermal: rockchip: explicitly request exclusive reset control

for the driver-related Rockchip changes

Acked-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Heiko Stuebner]

Hi,

>   crypto: rockchip: explicitly request exclusive reset control
>   iio: adc: rockchip_saradc: explicitly request exclusive reset control
>   PCI: rockchip: explicitly request exclusive reset control
>   phy: rockchip-pcie: explicitly request exclusive reset control
>   phy: rockchip-typec: explicitly request exclusive reset control
>   phy: rockchip-usb: explicitly request exclusive reset control
>   thermal: rockchip: explicitly request exclusive reset control

for the driver-related Rockchip changes

Acked-by: Heiko Stuebner <heiko@sntech.de>
_______________________________________________
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Nouveau@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/nouveau

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Dmitry Torokhov]

On Thu, Jul 20, 2017 at 5:55 AM, Philipp Zabel <p.zabel@pengutronix.de> wrote:
> Hi Thomas,
>
> On Thu, 2017-07-20 at 12:36 +0200, Thomas Petazzoni wrote:
>> Hello,
>>
>> On Thu, 20 Jul 2017 11:36:55 +0200, Philipp Zabel wrote:
>>
>> > > I don't know if it has been discussed in the past, so forgive me if it
>> > > has been. Have you considered adding a "int flags" argument to the
>> > > existing reset_control_get_*() functions, rather than introducing
>> > > separate exclusive variants ?
>> > >
>> > > Indeed, with a "int flags" argument you could in the future add more
>> > > variants/behaviors without actually multiplying the number of
>> > > functions. Something like the "flags" argument for request_irq() for
>> > > example.
>> >
>> > I can't find the discussion right now, but I remember we had talked
>> > about this in the past.
>> > Behind the scenes, all the inline API functions already call common
>> > entry points with flags (well, currently separate bool parameters for
>> > shared and optional).
>> > One reason against exposing those as an int flags in the user facing API
>> > is the possibility to accidentally provide a wrong value.
>>
>> This is a quite strange argument. You could also accidentally use the
>> wrong variant of the function, just like you could use the wrong flag.
>
> You can't accidentally use no flag at all or a completely bogus value
> with the "plethora of inline functions" variant.
>
>> Once again, the next time you have another parameter for those reset
>> functions, beyond the exclusive/shared variant, you will multiply again
>> by two the number of functions ? You already have the  exclusive/shared
>> and optional/mandatory variants, so 4 variants. When you'll add a new
>> parameter, you'll have 8 variants. Doesn't seem really good.
>
> I'd rather avoid adding more variants, if possible. The complexity
> increases regardless of whether the API is expressed as a bunch of
> functions or as a single function with a bunch of flags.
>
>> What about reset_control_get(struct device *, const char *, int flags)
>> to replace all those variants ?
>
> While I like how this looks, unfortunately (devm_)reset_control_get
> already exists without the flags, so we can't change to that with a
> gentle transition.

This was done for gpiod_get() and its flags argument with horrifying
#define-ry, which thankfully was completely hidden from users.

-- 
Dmitry

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Linus Walleij]

On Thu, Jul 20, 2017 at 10:46 PM, Dmitry Torokhov
<dmitry.torokhov@gmail.com> wrote:
> On Thu, Jul 20, 2017 at 5:55 AM, Philipp Zabel <p.zabel@pengutronix.de> wrote:

>>> What about reset_control_get(struct device *, const char *, int flags)
>>> to replace all those variants ?
>>
>> While I like how this looks, unfortunately (devm_)reset_control_get
>> already exists without the flags, so we can't change to that with a
>> gentle transition.
>
> This was done for gpiod_get() and its flags argument with horrifying
> #define-ry, which thankfully was completely hidden from users.

For your reference:

commit bae48da237fcedd7ad09569025483b988635efb7
"gpiolib: add gpiod_get() and gpiod_put() functions"

commit 39b2bbe3d715cf5013b5c48695ccdd25bd3bf120
"gpio: add flags argument to gpiod_get*() functions"

commit 0dbc8b7afef6e4fddcfebcbacbeb269a0a3b06d5
"gpio: move varargs hack outside #ifdef GPIOLIB"

commit b17d1bf16cc72a374a48d748940f700009d40ff4
"gpio: make flags mandatory for gpiod_get functions"

Retrospectively ... was that really a good idea... it was a LOT
of trouble to add a flag, maybe it had been better to try and
just slam all users in a single go.

But it worked.

Yours,
Linus Walleij

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Philipp Zabel]

On Sun, 2017-07-23 at 20:41 +0200, Linus Walleij wrote:
> On Thu, Jul 20, 2017 at 10:46 PM, Dmitry Torokhov
> <dmitry.torokhov@gmail.com> wrote:
> > On Thu, Jul 20, 2017 at 5:55 AM, Philipp Zabel <p.zabel@pengutronix.de> wrote:
> 
> >>> What about reset_control_get(struct device *, const char *, int flags)
> >>> to replace all those variants ?
> >>
> >> While I like how this looks, unfortunately (devm_)reset_control_get
> >> already exists without the flags, so we can't change to that with a
> >> gentle transition.
> >
> > This was done for gpiod_get() and its flags argument with horrifying
> > #define-ry, which thankfully was completely hidden from users.
> 
> For your reference:
> 
> commit bae48da237fcedd7ad09569025483b988635efb7
> "gpiolib: add gpiod_get() and gpiod_put() functions"
> 
> commit 39b2bbe3d715cf5013b5c48695ccdd25bd3bf120
> "gpio: add flags argument to gpiod_get*() functions"
> 
> commit 0dbc8b7afef6e4fddcfebcbacbeb269a0a3b06d5
> "gpio: move varargs hack outside #ifdef GPIOLIB"
> 
> commit b17d1bf16cc72a374a48d748940f700009d40ff4
> "gpio: make flags mandatory for gpiod_get functions"
> 
> Retrospectively ... was that really a good idea... it was a LOT
> of trouble to add a flag, maybe it had been better to try and
> just slam all users in a single go.
> 
> But it worked.

Thanks for the hint and the references. It seems this turned out okay,
but I wouldn't dare to introduce such macro horror^Wmagic.
I'd rather have all users converted to the _exclusive/_shared function
calls and maybe then replace the internal __reset_control_get with
Thomas' suggestion.

regards
Philipp

Re: [PATCH 000/102] Convert drivers to explicit reset API

[Wolfram Sang]

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> Thanks for the hint and the references. It seems this turned out okay,
> but I wouldn't dare to introduce such macro horror^Wmagic.
> I'd rather have all users converted to the _exclusive/_shared function
> calls and maybe then replace the internal __reset_control_get with
> Thomas' suggestion.

I didn't follow the discussion closely. Shall I still apply the i2c
patches?


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Re: [PATCH 000/102] Convert drivers to explicit reset API

[Philipp Zabel]

On Sat, 2017-08-12 at 13:43 +0200, Wolfram Sang wrote:
> > Thanks for the hint and the references. It seems this turned out
> > okay,
> > but I wouldn't dare to introduce such macro horror^Wmagic.
> > I'd rather have all users converted to the _exclusive/_shared
> > function
> > calls and maybe then replace the internal __reset_control_get with
> > Thomas' suggestion.
> 
> I didn't follow the discussion closely. Shall I still apply the i2c
> patches?

Yes, please.

regards
Philipp