From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6FB6C0650E for ; Mon, 1 Jul 2019 09:48:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9337020673 for ; Mon, 1 Jul 2019 09:48:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728597AbfGAJsG (ORCPT ); Mon, 1 Jul 2019 05:48:06 -0400 Received: from inva020.nxp.com ([92.121.34.13]:33962 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728571AbfGAJsE (ORCPT ); Mon, 1 Jul 2019 05:48:04 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 1EDD61A0F55; Mon, 1 Jul 2019 11:48:02 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 2CBA81A09A5; Mon, 1 Jul 2019 11:47:51 +0200 (CEST) Received: from titan.ap.freescale.net (TITAN.ap.freescale.net [10.192.208.233]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id BCC9A402B6; Mon, 1 Jul 2019 17:47:19 +0800 (SGT) From: Anson.Huang@nxp.com To: daniel.lezcano@linaro.org, tglx@linutronix.de, robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, leonard.crestez@nxp.com, viresh.kumar@linaro.org, daniel.baluta@nxp.com, ping.bai@nxp.com, l.stach@pengutronix.de, abel.vesa@nxp.com, andrew.smirnov@gmail.com, ccaione@baylibre.com, angus@akkea.ca, agx@sigxcpu.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Linux-imx@nxp.com Subject: [PATCH V4 3/5] clocksource: imx-sysctr: Make timer work with clock driver using platform driver model Date: Mon, 1 Jul 2019 17:38:24 +0800 Message-Id: <20190701093826.5472-3-Anson.Huang@nxp.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20190701093826.5472-1-Anson.Huang@nxp.com> References: <20190701093826.5472-1-Anson.Huang@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Anson Huang On some i.MX8M platforms, clock driver uses platform driver model and it is NOT ready during timer initialization phase, the clock operations will fail and system counter driver will fail too. As all the i.MX8M platforms' system counter clock are from OSC which is always enabled, so it is no need to enable clock for system counter driver, the ONLY thing is to pass clock frequence to driver. To make system counter driver work for upper scenario, if DT's system counter node has property "clock-frequency" present, setting TIMER_OF_CLOCK_FREQUENCY flag to indicate timer-of driver to get clock frequency from DT directly instead of of_clk operation via clk APIs. Signed-off-by: Anson Huang --- Changes since V3: - remove the .prop_name initialization acording to timer-of changes in V4. --- drivers/clocksource/timer-imx-sysctr.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/clocksource/timer-imx-sysctr.c b/drivers/clocksource/timer-imx-sysctr.c index fd7d680..b82a549 100644 --- a/drivers/clocksource/timer-imx-sysctr.c +++ b/drivers/clocksource/timer-imx-sysctr.c @@ -98,7 +98,7 @@ static irqreturn_t sysctr_timer_interrupt(int irq, void *dev_id) } static struct timer_of to_sysctr = { - .flags = TIMER_OF_IRQ | TIMER_OF_CLOCK | TIMER_OF_BASE, + .flags = TIMER_OF_IRQ | TIMER_OF_BASE, .clkevt = { .name = "i.MX system counter timer", .features = CLOCK_EVT_FEAT_ONESHOT | @@ -130,6 +130,9 @@ static int __init sysctr_timer_init(struct device_node *np) { int ret = 0; + to_sysctr.flags |= of_find_property(np, "clock-frequency", NULL) ? + TIMER_OF_CLOCK_FREQUENCY : TIMER_OF_CLOCK; + ret = timer_of_init(np, &to_sysctr); if (ret) return ret; -- 2.7.4