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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 574C8C432C1 for ; Tue, 24 Sep 2019 16:50:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 28DE821971 for ; Tue, 24 Sep 2019 16:50:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569343833; bh=on4MoXKLcBAAwcvGInINaSXEOabjhNW79FFPggjuvbA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Wd5C7Kl9zDOuNyQTs1IfJumOuJACHepQgrw4+KWLd/oLnxF1qHDQ/bQarFCYq666j xT1QMngi+6XSQWHUjhQ+s94U6LXtzYl4uL/GI2Nab/1tA0P5b7ecBW/RElUGjG/QT+ v+896d83SMVqePhQA7ytGAW4ODWFmjlxUGtQAdNw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2410785AbfIXQuc (ORCPT ); Tue, 24 Sep 2019 12:50:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:43138 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2410737AbfIXQuU (ORCPT ); Tue, 24 Sep 2019 12:50:20 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3E13021971; Tue, 24 Sep 2019 16:50:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569343820; bh=on4MoXKLcBAAwcvGInINaSXEOabjhNW79FFPggjuvbA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tq/EDnF1JlwB2Tn44kFt278wZ0Ms0v0jwxpU0pE0bDDn4F4NlixKOkVsTteLUW1PK 70zTvlCgx17z2YczDI9Jdyugw7aHXnGTAbBDUjEUAXt4IhSN/ba0TzEk5Q8bSwcWpW YxsWOpUJIgf5wfkw93eEeZsRw8TR2N+ZAy+kQeDg= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Eugen Hristev , Alexandre Belloni , Claudiu Beznea , Stephen Boyd , Sasha Levin , linux-clk@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 44/50] clk: at91: select parent if main oscillator or bypass is enabled Date: Tue, 24 Sep 2019 12:48:41 -0400 Message-Id: <20190924164847.27780-44-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190924164847.27780-1-sashal@kernel.org> References: <20190924164847.27780-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eugen Hristev [ Upstream commit 69a6bcde7fd3fe6f3268ce26f31d9d9378384c98 ] Selecting the right parent for the main clock is done using only main oscillator enabled bit. In case we have this oscillator bypassed by an external signal (no driving on the XOUT line), we still use external clock, but with BYPASS bit set. So, in this case we must select the same parent as before. Create a macro that will select the right parent considering both bits from the MOR register. Use this macro when looking for the right parent. Signed-off-by: Eugen Hristev Link: https://lkml.kernel.org/r/1568042692-11784-2-git-send-email-eugen.hristev@microchip.com Acked-by: Alexandre Belloni Reviewed-by: Claudiu Beznea Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/at91/clk-main.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c index c813c27f2e58c..2f97a843d6d6b 100644 --- a/drivers/clk/at91/clk-main.c +++ b/drivers/clk/at91/clk-main.c @@ -27,6 +27,10 @@ #define MOR_KEY_MASK (0xff << 16) +#define clk_main_parent_select(s) (((s) & \ + (AT91_PMC_MOSCEN | \ + AT91_PMC_OSCBYPASS)) ? 1 : 0) + struct clk_main_osc { struct clk_hw hw; struct regmap *regmap; @@ -119,7 +123,7 @@ static int clk_main_osc_is_prepared(struct clk_hw *hw) regmap_read(regmap, AT91_PMC_SR, &status); - return (status & AT91_PMC_MOSCS) && (tmp & AT91_PMC_MOSCEN); + return (status & AT91_PMC_MOSCS) && clk_main_parent_select(tmp); } static const struct clk_ops main_osc_ops = { @@ -530,7 +534,7 @@ static u8 clk_sam9x5_main_get_parent(struct clk_hw *hw) regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status); - return status & AT91_PMC_MOSCEN ? 1 : 0; + return clk_main_parent_select(status); } static const struct clk_ops sam9x5_main_ops = { @@ -572,7 +576,7 @@ at91_clk_register_sam9x5_main(struct regmap *regmap, clkmain->hw.init = &init; clkmain->regmap = regmap; regmap_read(clkmain->regmap, AT91_CKGR_MOR, &status); - clkmain->parent = status & AT91_PMC_MOSCEN ? 1 : 0; + clkmain->parent = clk_main_parent_select(status); hw = &clkmain->hw; ret = clk_hw_register(NULL, &clkmain->hw); -- 2.20.1