From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Subject: Re: [PATCH] PM / Domains: add debugfs listing of struct generic_pm_domain-s Date: Thu, 11 Sep 2014 10:51:11 +0200 Message-ID: References: <1410348536-15201-1-git-send-email-m.matraszek@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: Received: from mail-la0-f42.google.com ([209.85.215.42]:34148 "EHLO mail-la0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753097AbaIKIvN (ORCPT ); Thu, 11 Sep 2014 04:51:13 -0400 In-Reply-To: <1410348536-15201-1-git-send-email-m.matraszek@samsung.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Maciej Matraszek Cc: Linux PM list , "linux-kernel@vger.kernel.org" , "Rafael J. Wysocki" , Len Brown , Pavel Machek , Greg Kroah-Hartman , Krzysztof Kozlowski , Bartlomiej Zolnierkiewicz , Linux-sh list Hi Maciej, On Wed, Sep 10, 2014 at 1:28 PM, Maciej Matraszek wrote: > Add /sys/kernel/debug/pm_genpd/pm_genpd_summary file, which > lists power domains in the system, their statuses and attached devices, > resembling /sys/kernel/debug/clk/clk_summary. > > Currently it is impossible to inspect (from userland) whether > a power domain is on or off. And, if it is on, which device blocks it > from powering down. This change allows developers working on > embedded devices power efficiency to list all necessary information > about generic power domains in one place. Thanks, this is _very_ useful! > The content of pm_genpd/pm_genpd_summary file is generated by iterating > over all generic power domain in the system, and, for each, > over registered devices. ... and over the subdomains, if present. I can confirm that part is working, too, cfr. the slaves column on r8a7740 domain status slaves /device runtime status ---------------------------------------------------------------------- a4su off a3sg off a3sm on a3sp on /devices/e6600000.pwm suspended /devices/e6c50000.serial active /devices/e6850000.sd suspended /devices/e6bd0000.mmc active a4s on a3sp, a3sm, a3sg /devices/e6900000.irqpin unsupported /devices/e6900004.irqpin unsupported /devices/e6900008.irqpin unsupported /devices/e690000c.irqpin unsupported /devices/e9a00000.ethernet active a3rv off a4r off a3rv /devices/fff20000.i2c suspended a4lc off c5 on a4lc, a4r, a4s, a4su /devices/e6050000.pfc unsupported /devices/e6138000.timer active > Signed-off-by: Maciej Matraszek Tested-by: Geert Uytterhoeven Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds