| Message ID | 20220606164138.66535-13-andriy.shevchenko@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | platform/x86: introduce p2sb_bar() helper | expand |
Am Mon, 6 Jun 2022 19:41:38 +0300 schrieb Andy Shevchenko <andriy.shevchenko@linux.intel.com>: > From: Henning Schild <henning.schild@siemens.com> > > On Apollo Lake the pinctrl drivers will now come up without ACPI. Use > that instead of open coding it. > Create a new driver for that which can later be filled with more GPIO > based models, and which has different dependencies. > > Signed-off-by: Henning Schild <henning.schild@siemens.com> > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > --- > drivers/leds/simple/Kconfig | 7 +- > drivers/leds/simple/Makefile | 1 + > drivers/leds/simple/simatic-ipc-leds-gpio.c | 105 > ++++++++++++++++++++ drivers/leds/simple/simatic-ipc-leds.c | > 80 +-------------- drivers/platform/x86/simatic-ipc.c | 5 > +- 5 files changed, 117 insertions(+), 81 deletions(-) > create mode 100644 drivers/leds/simple/simatic-ipc-leds-gpio.c > > diff --git a/drivers/leds/simple/Kconfig b/drivers/leds/simple/Kconfig > index bbf8cff3c3f6..fd2b8225d926 100644 > --- a/drivers/leds/simple/Kconfig > +++ b/drivers/leds/simple/Kconfig > @@ -1,12 +1,11 @@ > # SPDX-License-Identifier: GPL-2.0-only > config LEDS_SIEMENS_SIMATIC_IPC > tristate "LED driver for Siemens Simatic IPCs" > - depends on LEDS_CLASS > + depends on LEDS_GPIO > depends on SIEMENS_SIMATIC_IPC > - select P2SB > help > This option enables support for the LEDs of several > Industrial PCs from Siemens. > > - To compile this driver as a module, choose M here: the > module > - will be called simatic-ipc-leds. > + To compile this driver as a module, choose M here: the > modules > + will be called simatic-ipc-leds and simatic-ipc-leds-gpio. > diff --git a/drivers/leds/simple/Makefile > b/drivers/leds/simple/Makefile index 8481f1e9e360..1c7ef5e1324b 100644 > --- a/drivers/leds/simple/Makefile > +++ b/drivers/leds/simple/Makefile > @@ -1,2 +1,3 @@ > # SPDX-License-Identifier: GPL-2.0 > obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds.o > +obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += > simatic-ipc-leds-gpio.o diff --git > a/drivers/leds/simple/simatic-ipc-leds-gpio.c > b/drivers/leds/simple/simatic-ipc-leds-gpio.c new file mode 100644 > index 000000000000..4c9e663a90ba --- /dev/null > +++ b/drivers/leds/simple/simatic-ipc-leds-gpio.c > @@ -0,0 +1,105 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Siemens SIMATIC IPC driver for GPIO based LEDs > + * > + * Copyright (c) Siemens AG, 2022 > + * > + * Authors: > + * Henning Schild <henning.schild@siemens.com> > + */ > + > +#include <linux/gpio/machine.h> > +#include <linux/gpio/consumer.h> > +#include <linux/leds.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > + > +static struct gpiod_lookup_table simatic_ipc_led_gpio_table = { > + .dev_id = "leds-gpio", > + .table = { > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 51, NULL, 0, > GPIO_ACTIVE_LOW), > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 52, NULL, 1, > GPIO_ACTIVE_LOW), > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 53, NULL, 2, > GPIO_ACTIVE_LOW), > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 57, NULL, 3, > GPIO_ACTIVE_LOW), > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 58, NULL, 4, > GPIO_ACTIVE_LOW), > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 60, NULL, 5, > GPIO_ACTIVE_LOW), > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 56, NULL, 6, > GPIO_ACTIVE_LOW), > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 59, NULL, 7, > GPIO_ACTIVE_HIGH), > + }, > +}; > + > +static const struct gpio_led simatic_ipc_gpio_leds[] = { > + { .name = "green:" LED_FUNCTION_STATUS "-3" }, > + { .name = "red:" LED_FUNCTION_STATUS "-1" }, > + { .name = "green:" LED_FUNCTION_STATUS "-1" }, > + { .name = "red:" LED_FUNCTION_STATUS "-2" }, > + { .name = "green:" LED_FUNCTION_STATUS "-2" }, > + { .name = "red:" LED_FUNCTION_STATUS "-3" }, > +}; > + > +static const struct gpio_led_platform_data > simatic_ipc_gpio_leds_pdata = { > + .num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds), > + .leds = simatic_ipc_gpio_leds, > +}; > + > +static struct platform_device *simatic_leds_pdev; > + > +static int simatic_ipc_leds_gpio_remove(struct platform_device *pdev) > +{ > + gpiod_remove_lookup_table(&simatic_ipc_led_gpio_table); > + platform_device_unregister(simatic_leds_pdev); > + > + return 0; > +} > + > +static int simatic_ipc_leds_gpio_probe(struct platform_device *pdev) > +{ > + struct gpio_desc *gpiod; > + int err; > + > + gpiod_add_lookup_table(&simatic_ipc_led_gpio_table); > + simatic_leds_pdev = platform_device_register_resndata(NULL, > + "leds-gpio", PLATFORM_DEVID_NONE, NULL, 0, > + &simatic_ipc_gpio_leds_pdata, > + sizeof(simatic_ipc_gpio_leds_pdata)); If those GPIOs can not be found that leads to a pretty severe logging/polling endless loop. ... [ 34.017017] leds-gpio leds-gpio: Skipping unavailable LED gpio 0 (red:status-2) [ 34.017038] leds-gpio leds-gpio: cannot find GPIO chip apollolake-pinctrl.0, deferring [ 34.017158] leds-gpio leds-gpio: Skipping unavailable LED gpio 0 (red:status-2) [ 34.017161] leds-gpio leds-gpio: cannot find GPIO chip apollolake-pinctrl.0, deferring [ 34.017163] leds-gpio leds-gpio: Skipping unavailable LED gpio 0 (green:status-2) [ 34.017166] leds-gpio leds-gpio: cannot find GPIO chip apollolake-pinctrl.0, deferring [ 34.017168] leds-gpio leds-gpio: Skipping unavailable LED gpio 0 (red:status-3) [ 34.017179] leds-gpio leds-gpio: cannot find GPIO chip apollolake-pinctrl.0, deferring [ 34.017275] leds-gpio leds-gpio: cannot find GPIO chip apollolake-pinctrl.0, deferring [ 34.017279] leds-gpio leds-gpio: Skipping unavailable LED gpio 0 (green:status-3) ... This can be seen when the kernel is build without CONFIG_PINCTRL_BROXTON. Can anyone please give advise on how to proceed here. I could do something like i proposed in "[PATCH 3/4] leds: simatic-ipc-leds-gpio: add new model 227G". if (!IS_ENABLED(CONFIG_PINCTRL_BROXTON)) return -ENO... before registering the platform device. An alternative could be to try and handle that -EPROBE_DEFER but that might be hard because it might well fail a couple of times before eventually that gpio driver is up, so i think i will send an update implementing that !IS_ENABLED. Ideally the gpio subsystem or leds-gpio would break that polling/printing loop for me, or make sure it would not happen in the first place. regards, Henning > + if (IS_ERR(simatic_leds_pdev)) { > + err = PTR_ERR(simatic_leds_pdev); > + goto out; > + } > + > + /* PM_BIOS_BOOT_N */ > + gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 6, > GPIOD_OUT_LOW); > + if (IS_ERR(gpiod)) { > + err = PTR_ERR(gpiod); > + goto out; > + } > + gpiod_put(gpiod); > + > + /* PM_WDT_OUT */ > + gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 7, > GPIOD_OUT_LOW); > + if (IS_ERR(gpiod)) { > + err = PTR_ERR(gpiod); > + goto out; > + } > + gpiod_put(gpiod); > + > + return 0; > +out: > + simatic_ipc_leds_gpio_remove(pdev); > + > + return err; > +} > + > +static struct platform_driver simatic_ipc_led_gpio_driver = { > + .probe = simatic_ipc_leds_gpio_probe, > + .remove = simatic_ipc_leds_gpio_remove, > + .driver = { > + .name = KBUILD_MODNAME, > + } > +}; > +module_platform_driver(simatic_ipc_led_gpio_driver); > + > +MODULE_LICENSE("GPL v2"); > +MODULE_ALIAS("platform:" KBUILD_MODNAME); > +MODULE_SOFTDEP("pre: platform:leds-gpio"); > +MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>"); > diff --git a/drivers/leds/simple/simatic-ipc-leds.c > b/drivers/leds/simple/simatic-ipc-leds.c index > 2e7597c143d8..4894c228c165 100644 --- > a/drivers/leds/simple/simatic-ipc-leds.c +++ > b/drivers/leds/simple/simatic-ipc-leds.c @@ -15,7 +15,6 @@ > #include <linux/leds.h> > #include <linux/module.h> > #include <linux/pci.h> > -#include <linux/platform_data/x86/p2sb.h> > #include <linux/platform_data/x86/simatic-ipc-base.h> > #include <linux/platform_device.h> > #include <linux/sizes.h> > @@ -24,7 +23,7 @@ > #define SIMATIC_IPC_LED_PORT_BASE 0x404E > > struct simatic_ipc_led { > - unsigned int value; /* mask for io and offset for mem */ > + unsigned int value; /* mask for io */ > char *name; > struct led_classdev cdev; > }; > @@ -39,21 +38,6 @@ static struct simatic_ipc_led > simatic_ipc_leds_io[] = { { } > }; > > -/* the actual start will be discovered with p2sb, 0 is a placeholder > */ -static struct resource simatic_ipc_led_mem_res = > DEFINE_RES_MEM_NAMED(0, 0, KBUILD_MODNAME); - > -static void __iomem *simatic_ipc_led_memory; > - > -static struct simatic_ipc_led simatic_ipc_leds_mem[] = { > - {0x500 + 0x1A0, "red:" LED_FUNCTION_STATUS "-1"}, > - {0x500 + 0x1A8, "green:" LED_FUNCTION_STATUS "-1"}, > - {0x500 + 0x1C8, "red:" LED_FUNCTION_STATUS "-2"}, > - {0x500 + 0x1D0, "green:" LED_FUNCTION_STATUS "-2"}, > - {0x500 + 0x1E0, "red:" LED_FUNCTION_STATUS "-3"}, > - {0x500 + 0x198, "green:" LED_FUNCTION_STATUS "-3"}, > - { } > -}; > - > static struct resource simatic_ipc_led_io_res = > DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, > KBUILD_MODNAME); > @@ -89,28 +73,6 @@ static enum led_brightness > simatic_ipc_led_get_io(struct led_classdev *led_cd) return > inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : > led_cd->max_brightness; } > -static void simatic_ipc_led_set_mem(struct led_classdev *led_cd, > - enum led_brightness brightness) > -{ > - struct simatic_ipc_led *led = cdev_to_led(led_cd); > - void __iomem *reg = simatic_ipc_led_memory + led->value; > - u32 val; > - > - val = readl(reg); > - val = (val & ~1) | (brightness == LED_OFF); > - writel(val, reg); > -} > - > -static enum led_brightness simatic_ipc_led_get_mem(struct > led_classdev *led_cd) -{ > - struct simatic_ipc_led *led = cdev_to_led(led_cd); > - void __iomem *reg = simatic_ipc_led_memory + led->value; > - u32 val; > - > - val = readl(reg); > - return (val & 1) ? LED_OFF : led_cd->max_brightness; > -} > - > static int simatic_ipc_leds_probe(struct platform_device *pdev) > { > const struct simatic_ipc_platform *plat = > pdev->dev.platform_data; @@ -118,9 +80,7 @@ static int > simatic_ipc_leds_probe(struct platform_device *pdev) struct > simatic_ipc_led *ipcled; struct led_classdev *cdev; > struct resource *res; > - void __iomem *reg; > - int err, type; > - u32 val; > + int err; > > switch (plat->devmode) { > case SIMATIC_IPC_DEVICE_227D: > @@ -135,51 +95,19 @@ static int simatic_ipc_leds_probe(struct > platform_device *pdev) } > ipcled = simatic_ipc_leds_io; > } > - type = IORESOURCE_IO; > if (!devm_request_region(dev, res->start, > resource_size(res), KBUILD_MODNAME)) { dev_err(dev, "Unable to > register IO resource at %pR\n", res); return -EBUSY; > } > break; > - case SIMATIC_IPC_DEVICE_127E: > - res = &simatic_ipc_led_mem_res; > - ipcled = simatic_ipc_leds_mem; > - type = IORESOURCE_MEM; > - > - err = p2sb_bar(NULL, 0, res); > - if (err) > - return err; > - > - /* do the final address calculation */ > - res->start = res->start + (0xC5 << 16); > - res->end = res->start + SZ_4K - 1; > - > - simatic_ipc_led_memory = devm_ioremap_resource(dev, > res); > - if (IS_ERR(simatic_ipc_led_memory)) > - return PTR_ERR(simatic_ipc_led_memory); > - > - /* initialize power/watchdog LED */ > - reg = simatic_ipc_led_memory + 0x500 + 0x1D8; /* > PM_WDT_OUT */ > - val = readl(reg); > - writel(val & ~1, reg); > - > - reg = simatic_ipc_led_memory + 0x500 + 0x1C0; /* > PM_BIOS_BOOT_N */ > - val = readl(reg); > - writel(val | 1, reg); > - break; > default: > return -ENODEV; > } > > while (ipcled->value) { > cdev = &ipcled->cdev; > - if (type == IORESOURCE_MEM) { > - cdev->brightness_set = > simatic_ipc_led_set_mem; > - cdev->brightness_get = > simatic_ipc_led_get_mem; > - } else { > - cdev->brightness_set = > simatic_ipc_led_set_io; > - cdev->brightness_get = > simatic_ipc_led_get_io; > - } > + cdev->brightness_set = simatic_ipc_led_set_io; > + cdev->brightness_get = simatic_ipc_led_get_io; > cdev->max_brightness = LED_ON; > cdev->name = ipcled->name; > > diff --git a/drivers/platform/x86/simatic-ipc.c > b/drivers/platform/x86/simatic-ipc.c index 26c35e1660cb..ca3647b751d5 > 100644 --- a/drivers/platform/x86/simatic-ipc.c > +++ b/drivers/platform/x86/simatic-ipc.c > @@ -51,6 +51,7 @@ static int register_platform_devices(u32 station_id) > { > u8 ledmode = SIMATIC_IPC_DEVICE_NONE; > u8 wdtmode = SIMATIC_IPC_DEVICE_NONE; > + char *pdevname = KBUILD_MODNAME "_leds"; > int i; > > platform_data.devmode = SIMATIC_IPC_DEVICE_NONE; > @@ -64,10 +65,12 @@ static int register_platform_devices(u32 > station_id) } > > if (ledmode != SIMATIC_IPC_DEVICE_NONE) { > + if (ledmode == SIMATIC_IPC_DEVICE_127E) > + pdevname = KBUILD_MODNAME "_leds_gpio"; > platform_data.devmode = ledmode; > ipc_led_platform_device = > platform_device_register_data(NULL, > - KBUILD_MODNAME "_leds", > PLATFORM_DEVID_NONE, > + pdevname, PLATFORM_DEVID_NONE, > &platform_data, > sizeof(struct simatic_ipc_platform)); > if (IS_ERR(ipc_led_platform_device))
Am Mon, 1 Aug 2022 16:09:48 +0200 schrieb Henning Schild <henning.schild@siemens.com>: > Am Mon, 6 Jun 2022 19:41:38 +0300 > schrieb Andy Shevchenko <andriy.shevchenko@linux.intel.com>: > > > From: Henning Schild <henning.schild@siemens.com> > > > > On Apollo Lake the pinctrl drivers will now come up without ACPI. > > Use that instead of open coding it. > > Create a new driver for that which can later be filled with more > > GPIO based models, and which has different dependencies. > > > > Signed-off-by: Henning Schild <henning.schild@siemens.com> > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > > --- > > drivers/leds/simple/Kconfig | 7 +- > > drivers/leds/simple/Makefile | 1 + > > drivers/leds/simple/simatic-ipc-leds-gpio.c | 105 > > ++++++++++++++++++++ drivers/leds/simple/simatic-ipc-leds.c | > > 80 +-------------- drivers/platform/x86/simatic-ipc.c | 5 > > +- 5 files changed, 117 insertions(+), 81 deletions(-) > > create mode 100644 drivers/leds/simple/simatic-ipc-leds-gpio.c > > > > diff --git a/drivers/leds/simple/Kconfig > > b/drivers/leds/simple/Kconfig index bbf8cff3c3f6..fd2b8225d926 > > 100644 --- a/drivers/leds/simple/Kconfig > > +++ b/drivers/leds/simple/Kconfig > > @@ -1,12 +1,11 @@ > > # SPDX-License-Identifier: GPL-2.0-only > > config LEDS_SIEMENS_SIMATIC_IPC > > tristate "LED driver for Siemens Simatic IPCs" > > - depends on LEDS_CLASS > > + depends on LEDS_GPIO depends on PINCTRL_BROXTON Will have to see how to handle the additional boards. Either a gpio driver per pinctrl provider with a clear dep chain, or some sort up runtime check like i described in the earlier mail. Or simply depend on all potential providers in one driver, even if on a given board only one will be used. Henning > > depends on SIEMENS_SIMATIC_IPC > > - select P2SB > > help > > This option enables support for the LEDs of several > > Industrial PCs from Siemens. > > > > - To compile this driver as a module, choose M here: the > > module > > - will be called simatic-ipc-leds. > > + To compile this driver as a module, choose M here: the > > modules > > + will be called simatic-ipc-leds and > > simatic-ipc-leds-gpio. diff --git a/drivers/leds/simple/Makefile > > b/drivers/leds/simple/Makefile index 8481f1e9e360..1c7ef5e1324b > > 100644 --- a/drivers/leds/simple/Makefile > > +++ b/drivers/leds/simple/Makefile > > @@ -1,2 +1,3 @@ > > # SPDX-License-Identifier: GPL-2.0 > > obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds.o > > +obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += > > simatic-ipc-leds-gpio.o diff --git > > a/drivers/leds/simple/simatic-ipc-leds-gpio.c > > b/drivers/leds/simple/simatic-ipc-leds-gpio.c new file mode 100644 > > index 000000000000..4c9e663a90ba --- /dev/null > > +++ b/drivers/leds/simple/simatic-ipc-leds-gpio.c > > @@ -0,0 +1,105 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * Siemens SIMATIC IPC driver for GPIO based LEDs > > + * > > + * Copyright (c) Siemens AG, 2022 > > + * > > + * Authors: > > + * Henning Schild <henning.schild@siemens.com> > > + */ > > + > > +#include <linux/gpio/machine.h> > > +#include <linux/gpio/consumer.h> > > +#include <linux/leds.h> > > +#include <linux/module.h> > > +#include <linux/platform_device.h> > > + > > +static struct gpiod_lookup_table simatic_ipc_led_gpio_table = { > > + .dev_id = "leds-gpio", > > + .table = { > > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 51, NULL, > > 0, GPIO_ACTIVE_LOW), > > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 52, NULL, > > 1, GPIO_ACTIVE_LOW), > > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 53, NULL, > > 2, GPIO_ACTIVE_LOW), > > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 57, NULL, > > 3, GPIO_ACTIVE_LOW), > > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 58, NULL, > > 4, GPIO_ACTIVE_LOW), > > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 60, NULL, > > 5, GPIO_ACTIVE_LOW), > > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 56, NULL, > > 6, GPIO_ACTIVE_LOW), > > + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 59, NULL, > > 7, GPIO_ACTIVE_HIGH), > > + }, > > +}; > > + > > +static const struct gpio_led simatic_ipc_gpio_leds[] = { > > + { .name = "green:" LED_FUNCTION_STATUS "-3" }, > > + { .name = "red:" LED_FUNCTION_STATUS "-1" }, > > + { .name = "green:" LED_FUNCTION_STATUS "-1" }, > > + { .name = "red:" LED_FUNCTION_STATUS "-2" }, > > + { .name = "green:" LED_FUNCTION_STATUS "-2" }, > > + { .name = "red:" LED_FUNCTION_STATUS "-3" }, > > +}; > > + > > +static const struct gpio_led_platform_data > > simatic_ipc_gpio_leds_pdata = { > > + .num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds), > > + .leds = simatic_ipc_gpio_leds, > > +}; > > + > > +static struct platform_device *simatic_leds_pdev; > > + > > +static int simatic_ipc_leds_gpio_remove(struct platform_device > > *pdev) +{ > > + gpiod_remove_lookup_table(&simatic_ipc_led_gpio_table); > > + platform_device_unregister(simatic_leds_pdev); > > + > > + return 0; > > +} > > + > > +static int simatic_ipc_leds_gpio_probe(struct platform_device > > *pdev) +{ > > + struct gpio_desc *gpiod; > > + int err; > > + > > + gpiod_add_lookup_table(&simatic_ipc_led_gpio_table); > > + simatic_leds_pdev = platform_device_register_resndata(NULL, > > + "leds-gpio", PLATFORM_DEVID_NONE, NULL, 0, > > + &simatic_ipc_gpio_leds_pdata, > > + sizeof(simatic_ipc_gpio_leds_pdata)); > > If those GPIOs can not be found that leads to a pretty severe > logging/polling endless loop. > > ... > [ 34.017017] leds-gpio leds-gpio: Skipping unavailable LED gpio 0 > (red:status-2) [ 34.017038] leds-gpio leds-gpio: cannot find GPIO > chip apollolake-pinctrl.0, deferring [ 34.017158] leds-gpio > leds-gpio: Skipping unavailable LED gpio 0 (red:status-2) [ > 34.017161] leds-gpio leds-gpio: cannot find GPIO chip > apollolake-pinctrl.0, deferring [ 34.017163] leds-gpio leds-gpio: > Skipping unavailable LED gpio 0 (green:status-2) [ 34.017166] > leds-gpio leds-gpio: cannot find GPIO chip apollolake-pinctrl.0, > deferring [ 34.017168] leds-gpio leds-gpio: Skipping unavailable > LED gpio 0 (red:status-3) [ 34.017179] leds-gpio leds-gpio: cannot > find GPIO chip apollolake-pinctrl.0, deferring [ 34.017275] > leds-gpio leds-gpio: cannot find GPIO chip apollolake-pinctrl.0, > deferring [ 34.017279] leds-gpio leds-gpio: Skipping unavailable > LED gpio 0 (green:status-3) ... > > This can be seen when the kernel is build without > CONFIG_PINCTRL_BROXTON. Can anyone please give advise on how to > proceed here. > > I could do something like i proposed in "[PATCH 3/4] leds: > simatic-ipc-leds-gpio: add new model 227G". > > if (!IS_ENABLED(CONFIG_PINCTRL_BROXTON)) return -ENO... > > before registering the platform device. > > An alternative could be to try and handle that -EPROBE_DEFER but that > might be hard because it might well fail a couple of times before > eventually that gpio driver is up, so i think i will send an update > implementing that !IS_ENABLED. > > Ideally the gpio subsystem or leds-gpio would break that > polling/printing loop for me, or make sure it would not happen in the > first place. > > regards, > Henning > > > + if (IS_ERR(simatic_leds_pdev)) { > > + err = PTR_ERR(simatic_leds_pdev); > > + goto out; > > + } > > + > > + /* PM_BIOS_BOOT_N */ > > + gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 6, > > GPIOD_OUT_LOW); > > + if (IS_ERR(gpiod)) { > > + err = PTR_ERR(gpiod); > > + goto out; > > + } > > + gpiod_put(gpiod); > > + > > + /* PM_WDT_OUT */ > > + gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 7, > > GPIOD_OUT_LOW); > > + if (IS_ERR(gpiod)) { > > + err = PTR_ERR(gpiod); > > + goto out; > > + } > > + gpiod_put(gpiod); > > + > > + return 0; > > +out: > > + simatic_ipc_leds_gpio_remove(pdev); > > + > > + return err; > > +} > > + > > +static struct platform_driver simatic_ipc_led_gpio_driver = { > > + .probe = simatic_ipc_leds_gpio_probe, > > + .remove = simatic_ipc_leds_gpio_remove, > > + .driver = { > > + .name = KBUILD_MODNAME, > > + } > > +}; > > +module_platform_driver(simatic_ipc_led_gpio_driver); > > + > > +MODULE_LICENSE("GPL v2"); > > +MODULE_ALIAS("platform:" KBUILD_MODNAME); > > +MODULE_SOFTDEP("pre: platform:leds-gpio"); > > +MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>"); > > diff --git a/drivers/leds/simple/simatic-ipc-leds.c > > b/drivers/leds/simple/simatic-ipc-leds.c index > > 2e7597c143d8..4894c228c165 100644 --- > > a/drivers/leds/simple/simatic-ipc-leds.c +++ > > b/drivers/leds/simple/simatic-ipc-leds.c @@ -15,7 +15,6 @@ > > #include <linux/leds.h> > > #include <linux/module.h> > > #include <linux/pci.h> > > -#include <linux/platform_data/x86/p2sb.h> > > #include <linux/platform_data/x86/simatic-ipc-base.h> > > #include <linux/platform_device.h> > > #include <linux/sizes.h> > > @@ -24,7 +23,7 @@ > > #define SIMATIC_IPC_LED_PORT_BASE 0x404E > > > > struct simatic_ipc_led { > > - unsigned int value; /* mask for io and offset for mem */ > > + unsigned int value; /* mask for io */ > > char *name; > > struct led_classdev cdev; > > }; > > @@ -39,21 +38,6 @@ static struct simatic_ipc_led > > simatic_ipc_leds_io[] = { { } > > }; > > > > -/* the actual start will be discovered with p2sb, 0 is a > > placeholder */ -static struct resource simatic_ipc_led_mem_res = > > DEFINE_RES_MEM_NAMED(0, 0, KBUILD_MODNAME); - > > -static void __iomem *simatic_ipc_led_memory; > > - > > -static struct simatic_ipc_led simatic_ipc_leds_mem[] = { > > - {0x500 + 0x1A0, "red:" LED_FUNCTION_STATUS "-1"}, > > - {0x500 + 0x1A8, "green:" LED_FUNCTION_STATUS "-1"}, > > - {0x500 + 0x1C8, "red:" LED_FUNCTION_STATUS "-2"}, > > - {0x500 + 0x1D0, "green:" LED_FUNCTION_STATUS "-2"}, > > - {0x500 + 0x1E0, "red:" LED_FUNCTION_STATUS "-3"}, > > - {0x500 + 0x198, "green:" LED_FUNCTION_STATUS "-3"}, > > - { } > > -}; > > - > > static struct resource simatic_ipc_led_io_res = > > DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, > > KBUILD_MODNAME); > > @@ -89,28 +73,6 @@ static enum led_brightness > > simatic_ipc_led_get_io(struct led_classdev *led_cd) return > > inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : > > led_cd->max_brightness; } > > -static void simatic_ipc_led_set_mem(struct led_classdev *led_cd, > > - enum led_brightness brightness) > > -{ > > - struct simatic_ipc_led *led = cdev_to_led(led_cd); > > - void __iomem *reg = simatic_ipc_led_memory + led->value; > > - u32 val; > > - > > - val = readl(reg); > > - val = (val & ~1) | (brightness == LED_OFF); > > - writel(val, reg); > > -} > > - > > -static enum led_brightness simatic_ipc_led_get_mem(struct > > led_classdev *led_cd) -{ > > - struct simatic_ipc_led *led = cdev_to_led(led_cd); > > - void __iomem *reg = simatic_ipc_led_memory + led->value; > > - u32 val; > > - > > - val = readl(reg); > > - return (val & 1) ? LED_OFF : led_cd->max_brightness; > > -} > > - > > static int simatic_ipc_leds_probe(struct platform_device *pdev) > > { > > const struct simatic_ipc_platform *plat = > > pdev->dev.platform_data; @@ -118,9 +80,7 @@ static int > > simatic_ipc_leds_probe(struct platform_device *pdev) struct > > simatic_ipc_led *ipcled; struct led_classdev *cdev; > > struct resource *res; > > - void __iomem *reg; > > - int err, type; > > - u32 val; > > + int err; > > > > switch (plat->devmode) { > > case SIMATIC_IPC_DEVICE_227D: > > @@ -135,51 +95,19 @@ static int simatic_ipc_leds_probe(struct > > platform_device *pdev) } > > ipcled = simatic_ipc_leds_io; > > } > > - type = IORESOURCE_IO; > > if (!devm_request_region(dev, res->start, > > resource_size(res), KBUILD_MODNAME)) { dev_err(dev, "Unable to > > register IO resource at %pR\n", res); return -EBUSY; > > } > > break; > > - case SIMATIC_IPC_DEVICE_127E: > > - res = &simatic_ipc_led_mem_res; > > - ipcled = simatic_ipc_leds_mem; > > - type = IORESOURCE_MEM; > > - > > - err = p2sb_bar(NULL, 0, res); > > - if (err) > > - return err; > > - > > - /* do the final address calculation */ > > - res->start = res->start + (0xC5 << 16); > > - res->end = res->start + SZ_4K - 1; > > - > > - simatic_ipc_led_memory = devm_ioremap_resource(dev, > > res); > > - if (IS_ERR(simatic_ipc_led_memory)) > > - return PTR_ERR(simatic_ipc_led_memory); > > - > > - /* initialize power/watchdog LED */ > > - reg = simatic_ipc_led_memory + 0x500 + 0x1D8; /* > > PM_WDT_OUT */ > > - val = readl(reg); > > - writel(val & ~1, reg); > > - > > - reg = simatic_ipc_led_memory + 0x500 + 0x1C0; /* > > PM_BIOS_BOOT_N */ > > - val = readl(reg); > > - writel(val | 1, reg); > > - break; > > default: > > return -ENODEV; > > } > > > > while (ipcled->value) { > > cdev = &ipcled->cdev; > > - if (type == IORESOURCE_MEM) { > > - cdev->brightness_set = > > simatic_ipc_led_set_mem; > > - cdev->brightness_get = > > simatic_ipc_led_get_mem; > > - } else { > > - cdev->brightness_set = > > simatic_ipc_led_set_io; > > - cdev->brightness_get = > > simatic_ipc_led_get_io; > > - } > > + cdev->brightness_set = simatic_ipc_led_set_io; > > + cdev->brightness_get = simatic_ipc_led_get_io; > > cdev->max_brightness = LED_ON; > > cdev->name = ipcled->name; > > > > diff --git a/drivers/platform/x86/simatic-ipc.c > > b/drivers/platform/x86/simatic-ipc.c index > > 26c35e1660cb..ca3647b751d5 100644 --- > > a/drivers/platform/x86/simatic-ipc.c +++ > > b/drivers/platform/x86/simatic-ipc.c @@ -51,6 +51,7 @@ static int > > register_platform_devices(u32 station_id) { > > u8 ledmode = SIMATIC_IPC_DEVICE_NONE; > > u8 wdtmode = SIMATIC_IPC_DEVICE_NONE; > > + char *pdevname = KBUILD_MODNAME "_leds"; > > int i; > > > > platform_data.devmode = SIMATIC_IPC_DEVICE_NONE; > > @@ -64,10 +65,12 @@ static int register_platform_devices(u32 > > station_id) } > > > > if (ledmode != SIMATIC_IPC_DEVICE_NONE) { > > + if (ledmode == SIMATIC_IPC_DEVICE_127E) > > + pdevname = KBUILD_MODNAME "_leds_gpio"; > > platform_data.devmode = ledmode; > > ipc_led_platform_device = > > platform_device_register_data(NULL, > > - KBUILD_MODNAME "_leds", > > PLATFORM_DEVID_NONE, > > + pdevname, PLATFORM_DEVID_NONE, > > &platform_data, > > sizeof(struct > > simatic_ipc_platform)); if (IS_ERR(ipc_led_platform_device)) >
diff --git a/drivers/leds/simple/Kconfig b/drivers/leds/simple/Kconfig index bbf8cff3c3f6..fd2b8225d926 100644 --- a/drivers/leds/simple/Kconfig +++ b/drivers/leds/simple/Kconfig @@ -1,12 +1,11 @@ # SPDX-License-Identifier: GPL-2.0-only config LEDS_SIEMENS_SIMATIC_IPC tristate "LED driver for Siemens Simatic IPCs" - depends on LEDS_CLASS + depends on LEDS_GPIO depends on SIEMENS_SIMATIC_IPC - select P2SB help This option enables support for the LEDs of several Industrial PCs from Siemens. - To compile this driver as a module, choose M here: the module - will be called simatic-ipc-leds. + To compile this driver as a module, choose M here: the modules + will be called simatic-ipc-leds and simatic-ipc-leds-gpio. diff --git a/drivers/leds/simple/Makefile b/drivers/leds/simple/Makefile index 8481f1e9e360..1c7ef5e1324b 100644 --- a/drivers/leds/simple/Makefile +++ b/drivers/leds/simple/Makefile @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds.o +obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds-gpio.o diff --git a/drivers/leds/simple/simatic-ipc-leds-gpio.c b/drivers/leds/simple/simatic-ipc-leds-gpio.c new file mode 100644 index 000000000000..4c9e663a90ba --- /dev/null +++ b/drivers/leds/simple/simatic-ipc-leds-gpio.c @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Siemens SIMATIC IPC driver for GPIO based LEDs + * + * Copyright (c) Siemens AG, 2022 + * + * Authors: + * Henning Schild <henning.schild@siemens.com> + */ + +#include <linux/gpio/machine.h> +#include <linux/gpio/consumer.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +static struct gpiod_lookup_table simatic_ipc_led_gpio_table = { + .dev_id = "leds-gpio", + .table = { + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 51, NULL, 0, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 52, NULL, 1, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 53, NULL, 2, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 57, NULL, 3, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 58, NULL, 4, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 60, NULL, 5, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 56, NULL, 6, GPIO_ACTIVE_LOW), + GPIO_LOOKUP_IDX("apollolake-pinctrl.0", 59, NULL, 7, GPIO_ACTIVE_HIGH), + }, +}; + +static const struct gpio_led simatic_ipc_gpio_leds[] = { + { .name = "green:" LED_FUNCTION_STATUS "-3" }, + { .name = "red:" LED_FUNCTION_STATUS "-1" }, + { .name = "green:" LED_FUNCTION_STATUS "-1" }, + { .name = "red:" LED_FUNCTION_STATUS "-2" }, + { .name = "green:" LED_FUNCTION_STATUS "-2" }, + { .name = "red:" LED_FUNCTION_STATUS "-3" }, +}; + +static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = { + .num_leds = ARRAY_SIZE(simatic_ipc_gpio_leds), + .leds = simatic_ipc_gpio_leds, +}; + +static struct platform_device *simatic_leds_pdev; + +static int simatic_ipc_leds_gpio_remove(struct platform_device *pdev) +{ + gpiod_remove_lookup_table(&simatic_ipc_led_gpio_table); + platform_device_unregister(simatic_leds_pdev); + + return 0; +} + +static int simatic_ipc_leds_gpio_probe(struct platform_device *pdev) +{ + struct gpio_desc *gpiod; + int err; + + gpiod_add_lookup_table(&simatic_ipc_led_gpio_table); + simatic_leds_pdev = platform_device_register_resndata(NULL, + "leds-gpio", PLATFORM_DEVID_NONE, NULL, 0, + &simatic_ipc_gpio_leds_pdata, + sizeof(simatic_ipc_gpio_leds_pdata)); + if (IS_ERR(simatic_leds_pdev)) { + err = PTR_ERR(simatic_leds_pdev); + goto out; + } + + /* PM_BIOS_BOOT_N */ + gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 6, GPIOD_OUT_LOW); + if (IS_ERR(gpiod)) { + err = PTR_ERR(gpiod); + goto out; + } + gpiod_put(gpiod); + + /* PM_WDT_OUT */ + gpiod = gpiod_get_index(&simatic_leds_pdev->dev, NULL, 7, GPIOD_OUT_LOW); + if (IS_ERR(gpiod)) { + err = PTR_ERR(gpiod); + goto out; + } + gpiod_put(gpiod); + + return 0; +out: + simatic_ipc_leds_gpio_remove(pdev); + + return err; +} + +static struct platform_driver simatic_ipc_led_gpio_driver = { + .probe = simatic_ipc_leds_gpio_probe, + .remove = simatic_ipc_leds_gpio_remove, + .driver = { + .name = KBUILD_MODNAME, + } +}; +module_platform_driver(simatic_ipc_led_gpio_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" KBUILD_MODNAME); +MODULE_SOFTDEP("pre: platform:leds-gpio"); +MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>"); diff --git a/drivers/leds/simple/simatic-ipc-leds.c b/drivers/leds/simple/simatic-ipc-leds.c index 2e7597c143d8..4894c228c165 100644 --- a/drivers/leds/simple/simatic-ipc-leds.c +++ b/drivers/leds/simple/simatic-ipc-leds.c @@ -15,7 +15,6 @@ #include <linux/leds.h> #include <linux/module.h> #include <linux/pci.h> -#include <linux/platform_data/x86/p2sb.h> #include <linux/platform_data/x86/simatic-ipc-base.h> #include <linux/platform_device.h> #include <linux/sizes.h> @@ -24,7 +23,7 @@ #define SIMATIC_IPC_LED_PORT_BASE 0x404E struct simatic_ipc_led { - unsigned int value; /* mask for io and offset for mem */ + unsigned int value; /* mask for io */ char *name; struct led_classdev cdev; }; @@ -39,21 +38,6 @@ static struct simatic_ipc_led simatic_ipc_leds_io[] = { { } }; -/* the actual start will be discovered with p2sb, 0 is a placeholder */ -static struct resource simatic_ipc_led_mem_res = DEFINE_RES_MEM_NAMED(0, 0, KBUILD_MODNAME); - -static void __iomem *simatic_ipc_led_memory; - -static struct simatic_ipc_led simatic_ipc_leds_mem[] = { - {0x500 + 0x1A0, "red:" LED_FUNCTION_STATUS "-1"}, - {0x500 + 0x1A8, "green:" LED_FUNCTION_STATUS "-1"}, - {0x500 + 0x1C8, "red:" LED_FUNCTION_STATUS "-2"}, - {0x500 + 0x1D0, "green:" LED_FUNCTION_STATUS "-2"}, - {0x500 + 0x1E0, "red:" LED_FUNCTION_STATUS "-3"}, - {0x500 + 0x198, "green:" LED_FUNCTION_STATUS "-3"}, - { } -}; - static struct resource simatic_ipc_led_io_res = DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, KBUILD_MODNAME); @@ -89,28 +73,6 @@ static enum led_brightness simatic_ipc_led_get_io(struct led_classdev *led_cd) return inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : led_cd->max_brightness; } -static void simatic_ipc_led_set_mem(struct led_classdev *led_cd, - enum led_brightness brightness) -{ - struct simatic_ipc_led *led = cdev_to_led(led_cd); - void __iomem *reg = simatic_ipc_led_memory + led->value; - u32 val; - - val = readl(reg); - val = (val & ~1) | (brightness == LED_OFF); - writel(val, reg); -} - -static enum led_brightness simatic_ipc_led_get_mem(struct led_classdev *led_cd) -{ - struct simatic_ipc_led *led = cdev_to_led(led_cd); - void __iomem *reg = simatic_ipc_led_memory + led->value; - u32 val; - - val = readl(reg); - return (val & 1) ? LED_OFF : led_cd->max_brightness; -} - static int simatic_ipc_leds_probe(struct platform_device *pdev) { const struct simatic_ipc_platform *plat = pdev->dev.platform_data; @@ -118,9 +80,7 @@ static int simatic_ipc_leds_probe(struct platform_device *pdev) struct simatic_ipc_led *ipcled; struct led_classdev *cdev; struct resource *res; - void __iomem *reg; - int err, type; - u32 val; + int err; switch (plat->devmode) { case SIMATIC_IPC_DEVICE_227D: @@ -135,51 +95,19 @@ static int simatic_ipc_leds_probe(struct platform_device *pdev) } ipcled = simatic_ipc_leds_io; } - type = IORESOURCE_IO; if (!devm_request_region(dev, res->start, resource_size(res), KBUILD_MODNAME)) { dev_err(dev, "Unable to register IO resource at %pR\n", res); return -EBUSY; } break; - case SIMATIC_IPC_DEVICE_127E: - res = &simatic_ipc_led_mem_res; - ipcled = simatic_ipc_leds_mem; - type = IORESOURCE_MEM; - - err = p2sb_bar(NULL, 0, res); - if (err) - return err; - - /* do the final address calculation */ - res->start = res->start + (0xC5 << 16); - res->end = res->start + SZ_4K - 1; - - simatic_ipc_led_memory = devm_ioremap_resource(dev, res); - if (IS_ERR(simatic_ipc_led_memory)) - return PTR_ERR(simatic_ipc_led_memory); - - /* initialize power/watchdog LED */ - reg = simatic_ipc_led_memory + 0x500 + 0x1D8; /* PM_WDT_OUT */ - val = readl(reg); - writel(val & ~1, reg); - - reg = simatic_ipc_led_memory + 0x500 + 0x1C0; /* PM_BIOS_BOOT_N */ - val = readl(reg); - writel(val | 1, reg); - break; default: return -ENODEV; } while (ipcled->value) { cdev = &ipcled->cdev; - if (type == IORESOURCE_MEM) { - cdev->brightness_set = simatic_ipc_led_set_mem; - cdev->brightness_get = simatic_ipc_led_get_mem; - } else { - cdev->brightness_set = simatic_ipc_led_set_io; - cdev->brightness_get = simatic_ipc_led_get_io; - } + cdev->brightness_set = simatic_ipc_led_set_io; + cdev->brightness_get = simatic_ipc_led_get_io; cdev->max_brightness = LED_ON; cdev->name = ipcled->name; diff --git a/drivers/platform/x86/simatic-ipc.c b/drivers/platform/x86/simatic-ipc.c index 26c35e1660cb..ca3647b751d5 100644 --- a/drivers/platform/x86/simatic-ipc.c +++ b/drivers/platform/x86/simatic-ipc.c @@ -51,6 +51,7 @@ static int register_platform_devices(u32 station_id) { u8 ledmode = SIMATIC_IPC_DEVICE_NONE; u8 wdtmode = SIMATIC_IPC_DEVICE_NONE; + char *pdevname = KBUILD_MODNAME "_leds"; int i; platform_data.devmode = SIMATIC_IPC_DEVICE_NONE; @@ -64,10 +65,12 @@ static int register_platform_devices(u32 station_id) } if (ledmode != SIMATIC_IPC_DEVICE_NONE) { + if (ledmode == SIMATIC_IPC_DEVICE_127E) + pdevname = KBUILD_MODNAME "_leds_gpio"; platform_data.devmode = ledmode; ipc_led_platform_device = platform_device_register_data(NULL, - KBUILD_MODNAME "_leds", PLATFORM_DEVID_NONE, + pdevname, PLATFORM_DEVID_NONE, &platform_data, sizeof(struct simatic_ipc_platform)); if (IS_ERR(ipc_led_platform_device))