From: Thomas Richard <thomas.richard@bootlin.com> To: "Linus Walleij" <linus.walleij@linaro.org>, "Bartosz Golaszewski" <brgl@bgdev.pl>, "Tony Lindgren" <tony@atomide.com>, "Aaro Koskinen" <aaro.koskinen@iki.fi>, "Janusz Krzysztofik" <jmkrzyszt@gmail.com>, "Vignesh R" <vigneshr@ti.com>, "Andi Shyti" <andi.shyti@kernel.org>, "Peter Rosin" <peda@axentia.se>, "Lorenzo Pieralisi" <lpieralisi@kernel.org>, "Krzysztof Wilczyński" <kw@linux.com>, "Rob Herring" <robh@kernel.org>, "Bjorn Helgaas" <bhelgaas@google.com>, "Siddharth Vadapalli" <s-vadapalli@ti.com> Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, gregory.clement@bootlin.com, theo.lebrun@bootlin.com, thomas.petazzoni@bootlin.com, u-kumar1@ti.com, Thomas Richard <thomas.richard@bootlin.com> Subject: [PATCH v5 03/11] mux: add mux_chip_resume() function Date: Tue, 16 Apr 2024 15:29:52 +0200 [thread overview] Message-ID: <20240102-j7200-pcie-s2r-v5-3-4b8c46711ded@bootlin.com> (raw) In-Reply-To: <20240102-j7200-pcie-s2r-v5-0-4b8c46711ded@bootlin.com> The mux_chip_resume() function restores a mux_chip using the cached state of each mux. Signed-off-by: Thomas Richard <thomas.richard@bootlin.com> --- drivers/mux/core.c | 29 +++++++++++++++++++++++++++++ include/linux/mux/driver.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/mux/core.c b/drivers/mux/core.c index 775816112932..0742aa2a7c73 100644 --- a/drivers/mux/core.c +++ b/drivers/mux/core.c @@ -215,6 +215,35 @@ void mux_chip_free(struct mux_chip *mux_chip) } EXPORT_SYMBOL_GPL(mux_chip_free); +/** + * mux_chip_resume() - restores the mux-chip state + * @mux_chip: The mux-chip to resume. + * + * Restores the mux-chip state. + * + * Return: Zero on success or a negative errno on error. + */ +int mux_chip_resume(struct mux_chip *mux_chip) +{ + int ret, i; + + for (i = 0; i < mux_chip->controllers; ++i) { + struct mux_control *mux = &mux_chip->mux[i]; + + if (mux->cached_state == MUX_CACHE_UNKNOWN) + continue; + + ret = mux_control_set(mux, mux->cached_state); + if (ret < 0) { + dev_err(&mux_chip->dev, "unable to restore state\n"); + return ret; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(mux_chip_resume); + static void devm_mux_chip_release(struct device *dev, void *res) { struct mux_chip *mux_chip = *(struct mux_chip **)res; diff --git a/include/linux/mux/driver.h b/include/linux/mux/driver.h index 18824064f8c0..2a7e5ec5d540 100644 --- a/include/linux/mux/driver.h +++ b/include/linux/mux/driver.h @@ -88,6 +88,7 @@ struct mux_chip *mux_chip_alloc(struct device *dev, int mux_chip_register(struct mux_chip *mux_chip); void mux_chip_unregister(struct mux_chip *mux_chip); void mux_chip_free(struct mux_chip *mux_chip); +int mux_chip_resume(struct mux_chip *mux_chip); struct mux_chip *devm_mux_chip_alloc(struct device *dev, unsigned int controllers, -- 2.39.2
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Richard <thomas.richard@bootlin.com> To: "Linus Walleij" <linus.walleij@linaro.org>, "Bartosz Golaszewski" <brgl@bgdev.pl>, "Tony Lindgren" <tony@atomide.com>, "Aaro Koskinen" <aaro.koskinen@iki.fi>, "Janusz Krzysztofik" <jmkrzyszt@gmail.com>, "Vignesh R" <vigneshr@ti.com>, "Andi Shyti" <andi.shyti@kernel.org>, "Peter Rosin" <peda@axentia.se>, "Lorenzo Pieralisi" <lpieralisi@kernel.org>, "Krzysztof Wilczyński" <kw@linux.com>, "Rob Herring" <robh@kernel.org>, "Bjorn Helgaas" <bhelgaas@google.com>, "Siddharth Vadapalli" <s-vadapalli@ti.com> Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, gregory.clement@bootlin.com, theo.lebrun@bootlin.com, thomas.petazzoni@bootlin.com, u-kumar1@ti.com, Thomas Richard <thomas.richard@bootlin.com> Subject: [PATCH v5 03/11] mux: add mux_chip_resume() function Date: Tue, 16 Apr 2024 15:29:52 +0200 [thread overview] Message-ID: <20240102-j7200-pcie-s2r-v5-3-4b8c46711ded@bootlin.com> (raw) In-Reply-To: <20240102-j7200-pcie-s2r-v5-0-4b8c46711ded@bootlin.com> The mux_chip_resume() function restores a mux_chip using the cached state of each mux. Signed-off-by: Thomas Richard <thomas.richard@bootlin.com> --- drivers/mux/core.c | 29 +++++++++++++++++++++++++++++ include/linux/mux/driver.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/mux/core.c b/drivers/mux/core.c index 775816112932..0742aa2a7c73 100644 --- a/drivers/mux/core.c +++ b/drivers/mux/core.c @@ -215,6 +215,35 @@ void mux_chip_free(struct mux_chip *mux_chip) } EXPORT_SYMBOL_GPL(mux_chip_free); +/** + * mux_chip_resume() - restores the mux-chip state + * @mux_chip: The mux-chip to resume. + * + * Restores the mux-chip state. + * + * Return: Zero on success or a negative errno on error. + */ +int mux_chip_resume(struct mux_chip *mux_chip) +{ + int ret, i; + + for (i = 0; i < mux_chip->controllers; ++i) { + struct mux_control *mux = &mux_chip->mux[i]; + + if (mux->cached_state == MUX_CACHE_UNKNOWN) + continue; + + ret = mux_control_set(mux, mux->cached_state); + if (ret < 0) { + dev_err(&mux_chip->dev, "unable to restore state\n"); + return ret; + } + } + + return 0; +} +EXPORT_SYMBOL_GPL(mux_chip_resume); + static void devm_mux_chip_release(struct device *dev, void *res) { struct mux_chip *mux_chip = *(struct mux_chip **)res; diff --git a/include/linux/mux/driver.h b/include/linux/mux/driver.h index 18824064f8c0..2a7e5ec5d540 100644 --- a/include/linux/mux/driver.h +++ b/include/linux/mux/driver.h @@ -88,6 +88,7 @@ struct mux_chip *mux_chip_alloc(struct device *dev, int mux_chip_register(struct mux_chip *mux_chip); void mux_chip_unregister(struct mux_chip *mux_chip); void mux_chip_free(struct mux_chip *mux_chip); +int mux_chip_resume(struct mux_chip *mux_chip); struct mux_chip *devm_mux_chip_alloc(struct device *dev, unsigned int controllers, -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2024-04-16 13:30 UTC|newest] Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-04-16 13:29 [PATCH v5 00/11] Add suspend to ram support for PCIe on J7200 Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-16 13:29 ` [PATCH v5 01/11] gpio: pca953x: move suspend()/resume() to suspend_noirq()/resume_noirq() Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-23 9:42 ` Geert Uytterhoeven 2024-04-23 9:42 ` Geert Uytterhoeven 2024-04-23 10:34 ` Andy Shevchenko 2024-04-23 10:34 ` Andy Shevchenko 2024-04-23 10:53 ` Thomas Richard 2024-04-23 10:53 ` Thomas Richard 2024-04-23 15:31 ` Geert Uytterhoeven 2024-04-23 15:31 ` Geert Uytterhoeven 2024-04-16 13:29 ` [PATCH v5 02/11] i2c: omap: wakeup the controller during suspend() callback Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-19 8:47 ` Andi Shyti 2024-04-19 8:47 ` Andi Shyti 2024-04-22 9:40 ` Thomas Richard 2024-04-22 9:40 ` Thomas Richard 2024-04-22 19:44 ` Bjorn Helgaas 2024-04-22 19:44 ` Bjorn Helgaas 2024-04-24 10:24 ` Thomas Richard 2024-04-24 10:24 ` Thomas Richard 2024-04-16 13:29 ` Thomas Richard [this message] 2024-04-16 13:29 ` [PATCH v5 03/11] mux: add mux_chip_resume() function Thomas Richard 2024-04-16 13:29 ` [PATCH v5 04/11] mux: mmio: add resume support Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-16 13:29 ` [PATCH v5 05/11] PCI: cadence: Extract link setup sequence from cdns_pcie_host_setup() Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-16 14:16 ` Dan Carpenter 2024-04-16 14:16 ` Dan Carpenter 2024-04-16 16:01 ` Thomas Richard 2024-04-16 16:01 ` Thomas Richard 2024-05-14 13:15 ` Thomas Richard 2024-05-14 13:15 ` Thomas Richard 2024-05-15 7:05 ` Dan Carpenter 2024-05-15 7:05 ` Dan Carpenter 2024-04-16 13:29 ` [PATCH v5 06/11] PCI: cadence: Set cdns_pcie_host_init() global Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-16 13:29 ` [PATCH v5 07/11] PCI: j721e: Use dev_err_probe() in the probe() function Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-16 13:29 ` [PATCH v5 08/11] PCI: j721e: Add reset GPIO to struct j721e_pcie Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-16 13:29 ` [PATCH v5 09/11] PCI: Add T_PERST_CLK_US macro Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-16 13:29 ` [PATCH v5 10/11] PCI: j721e: Use " Thomas Richard 2024-04-16 13:29 ` Thomas Richard 2024-04-16 13:30 ` [PATCH v5 11/11] PCI: j721e: Add suspend and resume support Thomas Richard 2024-04-16 13:30 ` Thomas Richard
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