From patchwork Tue Sep 18 20:54:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lubomir Rintel X-Patchwork-Id: 10604867 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CDE396CB for ; Tue, 18 Sep 2018 20:58:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BBC3E2B0F6 for ; Tue, 18 Sep 2018 20:58:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AFD322B104; Tue, 18 Sep 2018 20:58:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2BE742B0F6 for ; Tue, 18 Sep 2018 20:58:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=wretCGz9THrCxLgl64zMtV4zkuHBQbX7tSfi5R32IQY=; b=VrjOfU8AEIMoGXst3LbDUGtUCS T3TicI49rLcgFgz/H9cnNwTUwSDMduUeVbZR2O9zwi7r1WnTEZicyOICwzK917mS0EGlelfi2ZbSF fCEv5mgZeoY32XIZgJE7Zuz9qOZ0FmmyJY1bI5bIM5xURCbxhCn30XVLu4lqsGSie15G4C9KZ6tPQ ZRzQKgUyCWOlv+LnoUc1aUi68QVfI+DSiLXbAjsY/WrgKO3YnfUjD6Pf6G/ZHlQmBnnxyts3IStA6 CoeomWB/7Udm72lxR0hxaalt+6+Yrq3INUbYaeAUqv/yE/j0fBsI9jo0iWEwcnMaiPSoJO7NvIcR2 QQn3E/VQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1g2N4M-0002eh-2E; Tue, 18 Sep 2018 20:58:02 +0000 Received: from shell.v3.sk ([90.176.6.54]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1g2N1r-0001XW-C1 for linux-arm-kernel@lists.infradead.org; Tue, 18 Sep 2018 20:55:32 +0000 Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 1A98AB9489; Tue, 18 Sep 2018 22:55:16 +0200 (CEST) Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 3uOvzhWR24gX; Tue, 18 Sep 2018 22:55:09 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id EC007B9484; Tue, 18 Sep 2018 22:55:08 +0200 (CEST) X-Virus-Scanned: amavisd-new at zimbra.v3.sk Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id pdSrZFSLkhzG; Tue, 18 Sep 2018 22:55:06 +0200 (CEST) Received: from odvarok.lan (ip-89-102-31-34.net.upcbroadband.cz [89.102.31.34]) by zimbra.v3.sk (Postfix) with ESMTPSA id 127FAB9482; Tue, 18 Sep 2018 22:55:06 +0200 (CEST) From: Lubomir Rintel To: linux-kernel@vger.kernel.org Subject: [PATCH 4/4] ARM: mmp/mmp2: dt: enable the clock Date: Tue, 18 Sep 2018 22:54:55 +0200 Message-Id: <20180918205455.25464-5-lkundrak@v3.sk> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180918205455.25464-1-lkundrak@v3.sk> References: <20180918205455.25464-1-lkundrak@v3.sk> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180918_135527_787970_6358A801 X-CRM114-Status: GOOD ( 15.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, Eric Miao , Daniel Lezcano , Russell King , Haojian Zhuang , Lubomir Rintel , Rob Herring , Thomas Gleixner , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The device-tree booted MMP2 needs to enable the timer clock, otherwise the it would stop ticking when the boot finishes. It can also use the clock rate from the clk, the non-DT boards need to keep using the hardcoded rates. Signed-off-by: Lubomir Rintel Acked-by: Pavel Machek --- Changes since v1: - Made the clock optional, to keep compatibility with DTs without it arch/arm/mach-mmp/common.h | 2 +- arch/arm/mach-mmp/mmp2.c | 2 +- arch/arm/mach-mmp/pxa168.c | 2 +- arch/arm/mach-mmp/time.c | 32 ++++++++++++++++++++------------ 4 files changed, 23 insertions(+), 15 deletions(-) diff --git a/arch/arm/mach-mmp/common.h b/arch/arm/mach-mmp/common.h index 7e284d9c429f..5ac2851ef5d3 100644 --- a/arch/arm/mach-mmp/common.h +++ b/arch/arm/mach-mmp/common.h @@ -2,7 +2,7 @@ #include #define ARRAY_AND_SIZE(x) (x), ARRAY_SIZE(x) -extern void timer_init(int irq); +extern void timer_init(int irq, unsigned long rate); extern void __init mmp_map_io(void); extern void mmp_restart(enum reboot_mode, const char *); diff --git a/arch/arm/mach-mmp/mmp2.c b/arch/arm/mach-mmp/mmp2.c index afba5460cdaf..fb3e7e32c882 100644 --- a/arch/arm/mach-mmp/mmp2.c +++ b/arch/arm/mach-mmp/mmp2.c @@ -134,7 +134,7 @@ void __init mmp2_timer_init(void) clk_rst = APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(1); __raw_writel(clk_rst, APBC_TIMERS); - timer_init(IRQ_MMP2_TIMER1); + timer_init(IRQ_MMP2_TIMER1, 6500000); } /* on-chip devices */ diff --git a/arch/arm/mach-mmp/pxa168.c b/arch/arm/mach-mmp/pxa168.c index 0f5f16fb8c66..77a358165a56 100644 --- a/arch/arm/mach-mmp/pxa168.c +++ b/arch/arm/mach-mmp/pxa168.c @@ -79,7 +79,7 @@ void __init pxa168_timer_init(void) /* 3.25MHz, bus/functional clock enabled, release reset */ __raw_writel(TIMER_CLK_RST, APBC_TIMERS); - timer_init(IRQ_PXA168_TIMER1); + timer_init(IRQ_PXA168_TIMER1, 6500000); } void pxa168_clear_keypad_wakeup(void) diff --git a/arch/arm/mach-mmp/time.c b/arch/arm/mach-mmp/time.c index 96ad1db0b04b..351f4714bba6 100644 --- a/arch/arm/mach-mmp/time.c +++ b/arch/arm/mach-mmp/time.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -38,12 +39,6 @@ #include "cputype.h" #include "clock.h" -#ifdef CONFIG_CPU_MMP2 -#define MMP_CLOCK_FREQ 6500000 -#else -#define MMP_CLOCK_FREQ 3250000 -#endif - #define TIMERS_VIRT_BASE TIMERS1_VIRT_BASE #define MAX_DELTA (0xfffffffe) @@ -189,19 +184,18 @@ static struct irqaction timer_irq = { .dev_id = &ckevt, }; -void __init timer_init(int irq) +void __init timer_init(int irq, unsigned long rate) { timer_config(); - sched_clock_register(mmp_read_sched_clock, 32, MMP_CLOCK_FREQ); + sched_clock_register(mmp_read_sched_clock, 32, rate); ckevt.cpumask = cpumask_of(0); setup_irq(irq, &timer_irq); - clocksource_register_hz(&cksrc, MMP_CLOCK_FREQ); - clockevents_config_and_register(&ckevt, MMP_CLOCK_FREQ, - MIN_DELTA, MAX_DELTA); + clocksource_register_hz(&cksrc, rate); + clockevents_config_and_register(&ckevt, rate, MIN_DELTA, MAX_DELTA); } #ifdef CONFIG_OF @@ -213,7 +207,9 @@ static const struct of_device_id mmp_timer_dt_ids[] = { void __init mmp_dt_init_timer(void) { struct device_node *np; + struct clk *clk; int irq, ret; + unsigned long rate; np = of_find_matching_node(NULL, mmp_timer_dt_ids); if (!np) { @@ -221,6 +217,18 @@ void __init mmp_dt_init_timer(void) goto out; } + clk = of_clk_get(np, 0); + if (!IS_ERR(clk)) { + ret = clk_prepare_enable(clk); + if (ret) + goto out; + rate = clk_get_rate(clk) / 2; + } else if (cpu_is_pj4 ()) { + rate = 6500000; + } else { + rate = 3250000; + } + irq = irq_of_parse_and_map(np, 0); if (!irq) { ret = -EINVAL; @@ -231,7 +239,7 @@ void __init mmp_dt_init_timer(void) ret = -ENOMEM; goto out; } - timer_init(irq); + timer_init(irq, rate); return; out: pr_err("Failed to get timer from device tree with error:%d\n", ret);