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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 DF92AC4360C for ; Sun, 6 Oct 2019 17:23:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B87822077B for ; Sun, 6 Oct 2019 17:23:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570382600; bh=on4MoXKLcBAAwcvGInINaSXEOabjhNW79FFPggjuvbA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wWunW2xWY/Ja5Qln7QdKrNWPtALuOaK8ITPoMau4PUpCwRjGMpZrCjgx/lU7+MoNm iseiXh2TBpDjeOD8eS12Twv493ASRimWEOLKDxHap41iehFkFqE3N6ZmOQQkoCrXTC YyJZzRGlMpAK03ASTUsqAZduYFvIpNY0UszppFxo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727188AbfJFRXR (ORCPT ); Sun, 6 Oct 2019 13:23:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:47670 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727152AbfJFRXQ (ORCPT ); Sun, 6 Oct 2019 13:23:16 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D8A8120862; Sun, 6 Oct 2019 17:23:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1570382595; bh=on4MoXKLcBAAwcvGInINaSXEOabjhNW79FFPggjuvbA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CKT/k98jo8nqXDOxR8KxmF1UMMJhOFtTrpMQJ8XOT0nCltk9C1Vc+Otsya0DnIARA UYRFuYTphPnc2vMlzJ4a+VOCREoIemE8/YQofEqkdQAv0/xokJErxjIaSHuL6XCdoW DSZfEFgNE61Ndyvup5YTggGv6H0KPLryUTuDWidg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eugen Hristev , Alexandre Belloni , Claudiu Beznea , Stephen Boyd , Sasha Levin Subject: [PATCH 4.9 17/47] clk: at91: select parent if main oscillator or bypass is enabled Date: Sun, 6 Oct 2019 19:21:04 +0200 Message-Id: <20191006172017.794851460@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191006172016.873463083@linuxfoundation.org> References: <20191006172016.873463083@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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