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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-19 10:09:22 -0700 |
| commit | f4cdf7ca9a1fdcca413157df19753f388a5a224e (patch) | |
| tree | 60a31895b2446cd7fa27514e8c2843534a0de0da /net/rfkill/rfkill-gpio.c | |
| download | linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.tar.gz linux-stable-f4cdf7ca9a1fdcca413157df19753f388a5a224e.zip | |
Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-mediagrafted
Pull media updates from Mauro Carvalho Chehab:
- v4l2-core: added ISP statistics support and per-block validation
- v4l2-core: Allow unknown HDR10 white point and luminance
- New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor
- New codec: Milos: VPU v2.0 codec support
- isp driver: gained support for Dreamchip RPPX1 ISP framework
- vsp1 driver: gained support for RZ/T2H and RZ/N2H
- Novalake driver: gained CVS support for new NVL hardware
- dvb-core: fix feed leak on failed DMX_ADD_PID
- several driver fixes, cleanups and minor improvements
* tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits)
media: ipu-bridge: check all DMI entries when overriding sensor rotation
media: v4l2-async: avoid deleting unlinked ASC entry on link error
media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement
media: intel/ipu6: fix async notifier cleanup leak on parse error
media: staging/ipu7: fix async notifier UAF on probe error path
media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
media: rcar-isp: Fix VSPX reference leaks
media: rcar-isp: Release ISPCORE resources
media: i2c: imx415: Release runtime PM reference on VBLANK error
media: i2c: imx415: Return test pattern write errors
media: renesas: vsp1: Declare index variables in for loop statement
media: renesas: vsp1: Make reset control optional to support platforms without a reset line
media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs
media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs
media: nxp: imx8-isi: Add additional 32-bit RGB format support
media: nxp: imx8-isi: Add 16-bit raw Bayer format support
media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams
media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks
media: nxp: imx8-isi: Correct color map between V4L2 and ISI
...
Diffstat (limited to 'net/rfkill/rfkill-gpio.c')
| -rw-r--r-- | net/rfkill/rfkill-gpio.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/net/rfkill/rfkill-gpio.c b/net/rfkill/rfkill-gpio.c new file mode 100644 index 000000000..9c5b695db --- /dev/null +++ b/net/rfkill/rfkill-gpio.c @@ -0,0 +1,220 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2011, NVIDIA Corporation. + */ + +#include <linux/dmi.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/rfkill.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/slab.h> +#include <linux/acpi.h> +#include <linux/gpio/consumer.h> + +struct rfkill_gpio_data { + const char *name; + enum rfkill_type type; + struct gpio_desc *reset_gpio; + struct gpio_desc *shutdown_gpio; + + struct rfkill *rfkill_dev; + struct clk *clk; + + bool clk_enabled; +}; + +static int rfkill_gpio_set_power(void *data, bool blocked) +{ + struct rfkill_gpio_data *rfkill = data; + + if (!blocked && !IS_ERR(rfkill->clk) && !rfkill->clk_enabled) { + int ret = clk_enable(rfkill->clk); + + if (ret) + return ret; + } + + gpiod_set_value_cansleep(rfkill->shutdown_gpio, !blocked); + gpiod_set_value_cansleep(rfkill->reset_gpio, !blocked); + + if (blocked && !IS_ERR(rfkill->clk) && rfkill->clk_enabled) + clk_disable(rfkill->clk); + + rfkill->clk_enabled = !blocked; + + return 0; +} + +static const struct rfkill_ops rfkill_gpio_ops = { + .set_block = rfkill_gpio_set_power, +}; + +static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; +static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false }; + +static const struct acpi_gpio_mapping acpi_rfkill_default_gpios[] = { + { "reset-gpios", &reset_gpios, 1 }, + { "shutdown-gpios", &shutdown_gpios, 1 }, + { }, +}; + +static int rfkill_gpio_acpi_probe(struct device *dev, + struct rfkill_gpio_data *rfkill) +{ + const struct acpi_device_id *id; + + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (!id) + return -ENODEV; + + rfkill->type = (unsigned)id->driver_data; + + return devm_acpi_dev_add_driver_gpios(dev, acpi_rfkill_default_gpios); +} + +/* List of DMI matches for devices on which rfkill-gpio should not load, + * to avoid firmware bugs. + */ +static const struct dmi_system_id rfkill_gpio_deny_table[] = { + { + /* Lenovo Yoga Tab 3 Pro YT3-X90, bogus "BCM4752" device in DSDT */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Blade3-10A-001"), + }, + }, + { } +}; + +static int rfkill_gpio_probe(struct platform_device *pdev) +{ + struct rfkill_gpio_data *rfkill; + const char *type_name = NULL; + const char *name_property; + const char *type_property; + struct gpio_desc *gpio; + int ret; + + if (dmi_check_system(rfkill_gpio_deny_table)) + return -ENODEV; + + rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL); + if (!rfkill) + return -ENOMEM; + + if (dev_of_node(&pdev->dev)) { + name_property = "label"; + type_property = "radio-type"; + } else { + name_property = "name"; + type_property = "type"; + } + device_property_read_string(&pdev->dev, name_property, &rfkill->name); + device_property_read_string(&pdev->dev, type_property, &type_name); + + if (!rfkill->name) + rfkill->name = dev_name(&pdev->dev); + + rfkill->type = rfkill_find_type(type_name); + + if (ACPI_HANDLE(&pdev->dev)) { + ret = rfkill_gpio_acpi_probe(&pdev->dev, rfkill); + if (ret) + return ret; + } + + rfkill->clk = devm_clk_get(&pdev->dev, NULL); + + gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_ASIS); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + + rfkill->reset_gpio = gpio; + + gpio = devm_gpiod_get_optional(&pdev->dev, "shutdown", GPIOD_ASIS); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + + rfkill->shutdown_gpio = gpio; + + /* Make sure at-least one GPIO is defined for this instance */ + if (!rfkill->reset_gpio && !rfkill->shutdown_gpio) { + dev_err(&pdev->dev, "invalid platform data\n"); + return -EINVAL; + } + + ret = gpiod_direction_output(rfkill->reset_gpio, true); + if (ret) + return ret; + + ret = gpiod_direction_output(rfkill->shutdown_gpio, true); + if (ret) + return ret; + + rfkill->rfkill_dev = rfkill_alloc(rfkill->name, &pdev->dev, + rfkill->type, &rfkill_gpio_ops, + rfkill); + if (!rfkill->rfkill_dev) + return -ENOMEM; + + if (device_property_present(&pdev->dev, "default-blocked")) + rfkill_init_sw_state(rfkill->rfkill_dev, true); + + ret = rfkill_register(rfkill->rfkill_dev); + if (ret < 0) + goto err_destroy; + + platform_set_drvdata(pdev, rfkill); + + dev_info(&pdev->dev, "%s device registered.\n", rfkill->name); + + return 0; + +err_destroy: + rfkill_destroy(rfkill->rfkill_dev); + + return ret; +} + +static void rfkill_gpio_remove(struct platform_device *pdev) +{ + struct rfkill_gpio_data *rfkill = platform_get_drvdata(pdev); + + rfkill_unregister(rfkill->rfkill_dev); + rfkill_destroy(rfkill->rfkill_dev); +} + +#ifdef CONFIG_ACPI +static const struct acpi_device_id rfkill_acpi_match[] = { + { "BCM4752", RFKILL_TYPE_GPS }, + { "LNV4752", RFKILL_TYPE_GPS }, + { }, +}; +MODULE_DEVICE_TABLE(acpi, rfkill_acpi_match); +#endif + +static const struct of_device_id rfkill_of_match[] __maybe_unused = { + { .compatible = "rfkill-gpio", }, + { }, +}; +MODULE_DEVICE_TABLE(of, rfkill_of_match); + +static struct platform_driver rfkill_gpio_driver = { + .probe = rfkill_gpio_probe, + .remove = rfkill_gpio_remove, + .driver = { + .name = "rfkill_gpio", + .acpi_match_table = ACPI_PTR(rfkill_acpi_match), + .of_match_table = of_match_ptr(rfkill_of_match), + }, +}; + +module_platform_driver(rfkill_gpio_driver); + +MODULE_DESCRIPTION("gpio rfkill"); +MODULE_AUTHOR("NVIDIA"); +MODULE_LICENSE("GPL"); |
