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 D00BEC432C1 for ; Tue, 24 Sep 2019 16:53:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A5E1221D7A for ; Tue, 24 Sep 2019 16:53:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569344015; bh=on4MoXKLcBAAwcvGInINaSXEOabjhNW79FFPggjuvbA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=J3dhvyxVxv5tLVS0dsYIyIoUXxoER9HWvQsZy611p+M7FYi2qxX453rbnL9I/jW8/ vUc3T8XFWjV3s1CRL1az8PAvg5n2Pr5VgM1RhSiDXNQzrD+qRLQMs1/8z8aES0879G JejbZDvTxN/MaqlJHntYgEcfxZl0QQZMVfAqFRY4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2441721AbfIXQwj (ORCPT ); Tue, 24 Sep 2019 12:52:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:45776 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2441607AbfIXQwL (ORCPT ); Tue, 24 Sep 2019 12:52:11 -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 E5D4D21BE5; Tue, 24 Sep 2019 16:52:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1569343930; bh=on4MoXKLcBAAwcvGInINaSXEOabjhNW79FFPggjuvbA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=D+i6nvDrE7uxi9SWcrDaOIF302v/ud1gDBtZD/ILiYupqroqBEIYjiXugb7hGv9Iu 1URuk+aq6+xBZa6cmdV3xSA3MRUqC0zYSxSFtRDY8f+/f5Sy+dE0+o1MUZr1RmJ/9W D8M2mruNzrkdCMAQiyCBYcodmbGkXStth5YiwwOs= 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 4.9 18/19] clk: at91: select parent if main oscillator or bypass is enabled Date: Tue, 24 Sep 2019 12:51:29 -0400 Message-Id: <20190924165130.28625-18-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190924165130.28625-1-sashal@kernel.org> References: <20190924165130.28625-1-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