From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752982AbeDLDzo (ORCPT ); Wed, 11 Apr 2018 23:55:44 -0400 Received: from lelnx193.ext.ti.com ([198.47.27.77]:16736 "EHLO lelnx193.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752912AbeDLDza (ORCPT ); Wed, 11 Apr 2018 23:55:30 -0400 From: Keerthy To: , , CC: , , , , , , , , Subject: [PATCH 12/14] OMAP: CLK: CLKSRC: Add suspend resume hooks Date: Thu, 12 Apr 2018 09:23:57 +0530 Message-ID: <1523505239-16229-13-git-send-email-j-keerthy@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1523505239-16229-1-git-send-email-j-keerthy@ti.com> References: <1523505239-16229-1-git-send-email-j-keerthy@ti.com> MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add the save and restore for clksrc as part of suspend and resume so that it saves the counter value and restores. This is needed in modes like rtc+ddr in self-refresh not doing this stalls the time. Signed-off-by: Keerthy --- arch/arm/mach-omap2/timer.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c index 4fb4dc2..35fef97 100644 --- a/arch/arm/mach-omap2/timer.c +++ b/arch/arm/mach-omap2/timer.c @@ -442,6 +442,38 @@ static int __init __maybe_unused omap2_sync32k_clocksource_init(void) return ret; } +static unsigned int omap2_gptimer_clksrc_load; + +static void omap2_gptimer_clksrc_suspend(struct clocksource *unused) +{ + struct omap_hwmod *oh; + + omap2_gptimer_clksrc_load = + __omap_dm_timer_read_counter(&clksrc, OMAP_TIMER_NONPOSTED); + + oh = omap_hwmod_lookup(clocksource_gpt.name); + if (!oh) + return; + + omap_hwmod_idle(oh); +} + +static void omap2_gptimer_clksrc_resume(struct clocksource *unused) +{ + struct omap_hwmod *oh; + + oh = omap_hwmod_lookup(clocksource_gpt.name); + if (!oh) + return; + + omap_hwmod_enable(oh); + + __omap_dm_timer_load_start(&clksrc, + OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, + omap2_gptimer_clksrc_load, + OMAP_TIMER_NONPOSTED); +} + static void __init omap2_gptimer_clocksource_init(int gptimer_id, const char *fck_source, const char *property) @@ -451,6 +483,11 @@ static void __init omap2_gptimer_clocksource_init(int gptimer_id, clksrc.id = gptimer_id; clksrc.errata = omap_dm_timer_get_errata(); + if (soc_is_am43xx()) { + clocksource_gpt.suspend = omap2_gptimer_clksrc_suspend; + clocksource_gpt.resume = omap2_gptimer_clksrc_resume; + } + res = omap_dm_timer_init_one(&clksrc, fck_source, property, &clocksource_gpt.name, OMAP_TIMER_NONPOSTED); -- 1.9.1