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From: Henning Schild <henning.schild@siemens.com>
To: <linux-kernel@vger.kernel.org>, <linux-leds@vger.kernel.org>,
	<platform-driver-x86@vger.kernel.org>,
	<linux-watchdog@vger.kernel.org>
Cc: Srikanth Krishnakar <skrishnakar@gmail.com>,
	Jan Kiszka <jan.kiszka@siemens.com>,
	"Gerd Haeussler" <gerd.haeussler.ext@siemens.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Wim Van Sebroeck <wim@linux-watchdog.org>,
	Mark Gross <mgross@linux.intel.com>,
	Hans de Goede <hdegoede@redhat.com>, Pavel Machek <pavel@ucw.cz>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Michael Haener <michael.haener@siemens.com>
Subject: Re: [PATCH v2 4/4] platform/x86: pmc_atom: improve critclk_systems matching for Siemens PCs
Date: Mon, 15 Mar 2021 11:14:34 +0100	[thread overview]
Message-ID: <20210315111434.413137b5@md1za8fc.ad001.siemens.net> (raw)
In-Reply-To: <20210315095710.7140-5-henning.schild@siemens.com>

Am Mon, 15 Mar 2021 10:57:10 +0100
schrieb Henning Schild <henning.schild@siemens.com>:

> Siemens industrial PCs unfortunately can not always be properly
> identified the way we used to. An earlier commit introduced code that
> allows proper identification without looking at DMI strings that could
> differ based on product branding.
> Switch over to that proper way and revert commits that used to collect
> the machines based on unstable strings.
> 
> Fixes: 648e921888ad ("clk: x86: Stop marking clocks as
> CLK_IS_CRITICAL") Fixes: e8796c6c69d1 ("platform/x86: pmc_atom: Add
> Siemens CONNECT ...") Fixes: f110d252ae79 ("platform/x86: pmc_atom:
> Add Siemens SIMATIC ...") Fixes: ad0d315b4d4e ("platform/x86:
> pmc_atom: Add Siemens SIMATIC ...") Tested-by: Michael Haener
> <michael.haener@siemens.com> Signed-off-by: Henning Schild
> <henning.schild@siemens.com> ---
>  drivers/platform/x86/pmc_atom.c | 47
> +++++++++++++++++++-------------- 1 file changed, 27 insertions(+),
> 20 deletions(-)
> 
> diff --git a/drivers/platform/x86/pmc_atom.c
> b/drivers/platform/x86/pmc_atom.c index ca684ed760d1..38542d547f29
> 100644 --- a/drivers/platform/x86/pmc_atom.c
> +++ b/drivers/platform/x86/pmc_atom.c
> @@ -13,6 +13,7 @@
>  #include <linux/io.h>
>  #include <linux/platform_data/x86/clk-pmc-atom.h>
>  #include <linux/platform_data/x86/pmc_atom.h>
> +#include <linux/platform_data/x86/simatic-ipc.h>
>  #include <linux/platform_device.h>
>  #include <linux/pci.h>
>  #include <linux/seq_file.h>
> @@ -362,6 +363,23 @@ static void pmc_dbgfs_register(struct pmc_dev
> *pmc) }
>  #endif /* CONFIG_DEBUG_FS */
>  
> +static bool pmc_clk_is_critical = true;
> +
> +static int siemens_clk_is_critical(const struct dmi_system_id *d)
> +{
> +	u32 st_id;
> +
> +	if (dmi_walk(simatic_ipc_find_dmi_entry_helper, &st_id))
> +		goto out;
> +
> +	if (st_id == SIMATIC_IPC_IPC227E || st_id ==
> SIMATIC_IPC_IPC277E)
> +		return 1;
> +
> +out:
> +	pmc_clk_is_critical = false;
> +	return 1;
> +}
> +
>  /*
>   * Some systems need one or more of their pmc_plt_clks to be
>   * marked as critical.
> @@ -424,24 +442,10 @@ static const struct dmi_system_id
> critclk_systems[] = { },
>  	},
>  	{
> -		.ident = "SIMATIC IPC227E",
> -		.matches = {
> -			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
> -			DMI_MATCH(DMI_PRODUCT_VERSION, "6ES7647-8B"),
> -		},
> -	},
> -	{
> -		.ident = "SIMATIC IPC277E",
> -		.matches = {
> -			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
> -			DMI_MATCH(DMI_PRODUCT_VERSION, "6AV7882-0"),
> -		},
> -	},
> -	{
> -		.ident = "CONNECT X300",
> +		.callback = siemens_clk_is_critical,
> +		.ident = "SIEMENS AG",
>  		.matches = {
>  			DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
> -			DMI_MATCH(DMI_PRODUCT_VERSION,
> "A5E45074588"), },
>  	},
>  
> @@ -453,7 +457,7 @@ static int pmc_setup_clks(struct pci_dev *pdev,
> void __iomem *pmc_regmap, {
>  	struct platform_device *clkdev;
>  	struct pmc_clk_data *clk_data;
> -	const struct dmi_system_id *d =
> dmi_first_match(critclk_systems);
> +	const struct dmi_system_id *d;
>  
>  	clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
>  	if (!clk_data)
> @@ -461,9 +465,12 @@ static int pmc_setup_clks(struct pci_dev *pdev,
> void __iomem *pmc_regmap, 
>  	clk_data->base = pmc_regmap; /* offset is added by client */
>  	clk_data->clks = pmc_data->clks;
> -	if (d) {
> -		clk_data->critical = true;
> -		pr_info("%s critclks quirk enabled\n", d->ident);
> +	if (dmi_check_system(critclk_systems)) {

Had to switch to check_system to get the callback to work.

> +		clk_data->critical = pmc_clk_is_critical;
> +		if (clk_data->critical) {
> +			d = dmi_first_match(critclk_systems);
> +			pr_info("%s critclks quirk enabled\n",
> d->ident);

Now need a double match here just to print the ident. Not too happy
with that but proposing it like this to keep the ident printing.

I guess it could be improved by not printing the ident or having a
global variable and global callback to remember the ident to print
later. I would propose to not print the ident if the double-match does
not find traction.

Henning

> +		}
>  	}
>  
>  	clkdev = platform_device_register_data(&pdev->dev,
> "clk-pmc-atom",


  reply	other threads:[~2021-03-15 10:15 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-15  9:57 [PATCH v2 0/4] add device drivers for Siemens Industrial PCs Henning Schild
2021-03-15  9:57 ` [PATCH v2 1/4] platform/x86: simatic-ipc: add main driver for Siemens devices Henning Schild
2021-03-15 10:31   ` Andy Shevchenko
2021-03-15 16:30     ` Henning Schild
2021-03-17 19:13     ` Henning Schild
2021-03-17 20:03       ` Hans de Goede
2021-03-18 11:30         ` Enrico Weigelt, metux IT consult
2021-03-18 11:45           ` Hans de Goede
2021-03-26  9:55             ` Henning Schild
2021-03-26 12:21               ` Hans de Goede
2021-03-15  9:57 ` [PATCH v2 2/4] leds: simatic-ipc-leds: add new driver for Siemens Industial PCs Henning Schild
2021-03-15 10:48   ` Andy Shevchenko
2021-03-15 11:19     ` Pavel Machek
2021-03-15 11:26       ` Andy Shevchenko
2021-03-15 12:40       ` Henning Schild
2021-03-18 11:38       ` Enrico Weigelt, metux IT consult
2021-03-27  9:46         ` Henning Schild
2021-04-01 16:20           ` Enrico Weigelt, metux IT consult
2021-03-27  9:56       ` Henning Schild
2021-03-18 10:27     ` Enrico Weigelt, metux IT consult
2021-03-18 12:40       ` Alexander Dahl
2021-03-23 17:45         ` Henning Schild
2021-03-26 16:33     ` Henning Schild
2021-03-18 10:25   ` Enrico Weigelt, metux IT consult
2021-03-27 11:16     ` Henning Schild
2021-03-27 11:41       ` Henning Schild
2021-03-15  9:57 ` [PATCH v2 3/4] watchdog: simatic-ipc-wdt: add new driver for Siemens Industrial PCs Henning Schild
2021-03-15 15:10   ` Guenter Roeck
2021-03-29 16:28     ` Henning Schild
2021-03-15  9:57 ` [PATCH v2 4/4] platform/x86: pmc_atom: improve critclk_systems matching for Siemens PCs Henning Schild
2021-03-15 10:14   ` Henning Schild [this message]
2021-03-15 10:19     ` Hans de Goede
2021-03-15 12:09       ` Henning Schild
2021-03-15 14:58       ` [PATCH] platform/x86: pmc_atom: use callback for all dmi quirk entries Henning Schild
2021-03-15 16:31         ` Hans de Goede
2021-03-15 17:00           ` Henning Schild
2021-03-15 18:01             ` Hans de Goede
2021-03-16  5:47               ` Henning Schild
2021-03-16  9:43                 ` Hans de Goede
2021-03-15 13:25   ` [PATCH v2 4/4] platform/x86: pmc_atom: improve critclk_systems matching for Siemens PCs kernel test robot
2021-03-15 10:55 ` [PATCH v2 0/4] add device drivers for Siemens Industrial PCs Andy Shevchenko
2021-03-15 16:08   ` Henning Schild
2021-08-02  9:21   ` Henning Schild

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