linux-kernel - Re: [PATCH v5 2/4] leds: simatic-ipc-leds: add new driver for Siemens Industial PCs

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Date:   Wed, 15 Dec 2021 21:53:56 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Pavel Machek <pavel@....cz>,
        Henning Schild <henning.schild@...mens.com>
Cc:     linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org,
        platform-driver-x86@...r.kernel.org,
        linux-watchdog@...r.kernel.org,
        Srikanth Krishnakar <skrishnakar@...il.com>,
        Jan Kiszka <jan.kiszka@...mens.com>,
        Gerd Haeussler <gerd.haeussler.ext@...mens.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Mark Gross <mgross@...ux.intel.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Enrico Weigelt <lkml@...ux.net>
Subject: Re: [PATCH v5 2/4] leds: simatic-ipc-leds: add new driver for Siemens
 Industial PCs

Hi,

On 12/15/21 21:18, Pavel Machek wrote:
> On Mon 2021-12-13 13:05:00, Henning Schild wrote:
>> This driver adds initial support for several devices from Siemens. It is
>> based on a platform driver introduced in an earlier commit.
>>
>> One of the supported machines has GPIO connected LEDs, here we poke GPIO
>> memory directly because pinctrl does not come up.
>>
>> Signed-off-by: Henning Schild <henning.schild@...mens.com>
> 
> Acked-by: Pavel Machek <pavel@....cz>

I see that this patch #includes linux/platform_data/x86/simatic-ipc-base.h
which gets added by patch 1/4.

Pavel, can I take this patch upstream through the pdx86 tree (with you Ack
added)? Or shall I prepare an immutable branch with patch 1 for you to
merge ?

Regards,

Hans


> 
>> index c636ec069612..1a719caf14c0 100644
>> --- a/drivers/leds/Makefile
>> +++ b/drivers/leds/Makefile
>> @@ -105,3 +105,6 @@ obj-$(CONFIG_LEDS_TRIGGERS)		+= trigger/
>>  
>>  # LED Blink
>>  obj-y					+= blink/
>> +
>> +# Simple LED drivers
>> +obj-y					+= simple/
>> diff --git a/drivers/leds/simple/Kconfig b/drivers/leds/simple/Kconfig
>> new file mode 100644
>> index 000000000000..9f6a68336659
>> --- /dev/null
>> +++ b/drivers/leds/simple/Kconfig
>> @@ -0,0 +1,11 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
>> +config LEDS_SIEMENS_SIMATIC_IPC
>> +	tristate "LED driver for Siemens Simatic IPCs"
>> +	depends on LEDS_CLASS
>> +	depends on SIEMENS_SIMATIC_IPC
>> +	help
>> +	  This option enables support for the LEDs of several Industrial PCs
>> +	  from Siemens.
>> +
>> +	  To compile this driver as a module, choose M here: the module
>> +	  will be called simatic-ipc-leds.
>> diff --git a/drivers/leds/simple/Makefile b/drivers/leds/simple/Makefile
>> new file mode 100644
>> index 000000000000..8481f1e9e360
>> --- /dev/null
>> +++ b/drivers/leds/simple/Makefile
>> @@ -0,0 +1,2 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC)	+= simatic-ipc-leds.o
>> diff --git a/drivers/leds/simple/simatic-ipc-leds.c b/drivers/leds/simple/simatic-ipc-leds.c
>> new file mode 100644
>> index 000000000000..ff2c96e73241
>> --- /dev/null
>> +++ b/drivers/leds/simple/simatic-ipc-leds.c
>> @@ -0,0 +1,202 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Siemens SIMATIC IPC driver for LEDs
>> + *
>> + * Copyright (c) Siemens AG, 2018-2021
>> + *
>> + * Authors:
>> + *  Henning Schild <henning.schild@...mens.com>
>> + *  Jan Kiszka <jan.kiszka@...mens.com>
>> + *  Gerd Haeussler <gerd.haeussler.ext@...mens.com>
>> + */
>> +
>> +#include <linux/ioport.h>
>> +#include <linux/kernel.h>
>> +#include <linux/leds.h>
>> +#include <linux/module.h>
>> +#include <linux/pci.h>
>> +#include <linux/platform_data/x86/simatic-ipc-base.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/sizes.h>
>> +#include <linux/spinlock.h>
>> +
>> +#define SIMATIC_IPC_LED_PORT_BASE	0x404E
>> +
>> +struct simatic_ipc_led {
>> +	unsigned int value; /* mask for io and offset for mem */
>> +	char *name;
>> +	struct led_classdev cdev;
>> +};
>> +
>> +static struct simatic_ipc_led simatic_ipc_leds_io[] = {
>> +	{1 << 15, "green:" LED_FUNCTION_STATUS "-1" },
>> +	{1 << 7,  "yellow:" LED_FUNCTION_STATUS "-1" },
>> +	{1 << 14, "red:" LED_FUNCTION_STATUS "-2" },
>> +	{1 << 6,  "yellow:" LED_FUNCTION_STATUS "-2" },
>> +	{1 << 13, "red:" LED_FUNCTION_STATUS "-3" },
>> +	{1 << 5,  "yellow:" LED_FUNCTION_STATUS "-3" },
>> +	{ }
>> +};
>> +
>> +/* the actual start will be discovered with PCI, 0 is a placeholder */
>> +struct resource simatic_ipc_led_mem_res = DEFINE_RES_MEM_NAMED(0, SZ_4K, KBUILD_MODNAME);
>> +
>> +static void *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"},
>> +	{ }
>> +};
> 
> Would it be possible to get some better naming for leds? status-1 to
> status-3 is not quite useful.
> 
> Best regards,
> 								Pavel
>