Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752738AbaKLIAI (ORCPT ); Wed, 12 Nov 2014 03:00:08 -0500 Received: from mail-wi0-f176.google.com ([209.85.212.176]:34398 "EHLO mail-wi0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751366AbaKLIAD (ORCPT ); Wed, 12 Nov 2014 03:00:03 -0500 From: Tomeu Vizoso To: linux-tegra@vger.kernel.org Cc: Javier Martinez Canillas , mikko.perttunen@kapsi.fi, acourbot@nvidia.com, Mikko Perttunen , Tomeu Vizoso , Stephen Warren , Thierry Reding , Alexandre Courbot , linux-kernel@vger.kernel.org Subject: [PATCH v4 12/13] memory: tegra: Add debugfs entry for getting and setting the EMC rate Date: Wed, 12 Nov 2014 08:56:35 +0100 Message-Id: <1415779051-26410-13-git-send-email-tomeu.vizoso@collabora.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1415779051-26410-1-git-send-email-tomeu.vizoso@collabora.com> References: <1415779051-26410-1-git-send-email-tomeu.vizoso@collabora.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mikko Perttunen Will be very useful when tuning memory scaling. Signed-off-by: Mikko Perttunen Signed-off-by: Tomeu Vizoso --- drivers/memory/tegra/tegra124-emc.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/memory/tegra/tegra124-emc.c b/drivers/memory/tegra/tegra124-emc.c index a412ad4..e2678c9 100644 --- a/drivers/memory/tegra/tegra124-emc.c +++ b/drivers/memory/tegra/tegra124-emc.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -1033,6 +1034,38 @@ void tegra_emc_complete_timing_change(unsigned long rate) emc_complete_timing_change(emc_instance, timing); } +/* Debugfs entry */ + +static int emc_debug_rate_get(void *data, u64 *rate) +{ + struct clk *c = data; + + *rate = clk_get_rate(c); + + return 0; +} + +static int emc_debug_rate_set(void *data, u64 rate) +{ + struct clk *c = data; + + return clk_set_rate(c, rate); +} + +DEFINE_SIMPLE_ATTRIBUTE(emc_debug_rate_fops, emc_debug_rate_get, + emc_debug_rate_set, "%lld\n"); + +void emc_debugfs_init(void) +{ + struct dentry *d; + + d = debugfs_create_file("emc_rate", S_IRUGO | S_IWUSR, NULL, + clk_get_sys("tegra-clk-debug", "emc"), + &emc_debug_rate_fops); + if (!d) + pr_warn("failed to create debugfs entries\n"); +} + static int tegra_emc_probe(struct platform_device *pdev) { struct tegra_emc *tegra; @@ -1100,6 +1133,8 @@ static int tegra_emc_probe(struct platform_device *pdev) emc_instance = tegra; + emc_debugfs_init(); + return 0; }; -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/