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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3AAAECA5FD9 for ; Fri, 2 Oct 2026 07:44:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ri2HpUjT8qOrOMqbL2h+R1txn9sz+vfKeiacwgzeYJM=; b=LdYSsP64WwzLRi2zDoE4zAECTb aIfbRSSDaBLD03q9j+A3Y+nmYEDTjdlf2WOXjW1x+mTR65GuiKjefl4FvewrQvxvkLpABX7K8B/5R JIPEmNfdEfK56cAYJSytieaJzA7stD1BDSul2IwCsQSv9pqDeWsh5yIE2DYXtHlOASK4Q5+iYPFKD sS9JVH3Ojpwf4QS1kPXTVpJNXUst9Ueg3JoXbebd0fmd24qju9y14b3yQ9Two9Wv2zhzMZuxeHH8Q TiUdGC3ePnTAY2rPVbm+Isu27bt+E/uuukUxSzNjGN+O7qawEPCYXNwarEblktO9v+Tk0U3z2Juwn lv20d7wQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCXwW-0000000Asfe-2xLX; Fri, 02 Oct 2026 07:44:32 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCXwL-0000000AsTE-0mva; Fri, 02 Oct 2026 07:44:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:Content-Transfer-Encoding :MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From: Sender:Reply-To:Content-ID:Content-Description; bh=ri2HpUjT8qOrOMqbL2h+R1txn9sz+vfKeiacwgzeYJM=; b=Zcvja022EfidXPvn3TX5QdQLBr 1Tvpw2KwzeYccwV891po077sESyPzzhYlpHWy95zhh7H4LfMLfupiiB6TSn0tgsv4lt5M6zlOZPYr ITVm8jMYrYc+lrYCrW1yW3maRXuhBwgkiFDB9kNgo01L5B6N6fFneXz8uz0hUoRWZpnJMSPuTj0s+ hKiRu9owQs5H5jvTaoKSUucYf4dPMbBl53wNXATH5q/tEfHoKDoUdJ+McNZucPxlYdSkvY3dJGofw nw26uXBIB30gr2FlpXBjpsZC8akc9A77FYvlDV08g5UDUv7p0ExPY4Ww1KiY3stChoXQoTO5QEMlF ZdT8scig==; Received: from rtits2.realtek.com ([211.75.126.72] helo=rtits2.realtek.com.tw) by desiato.infradead.org with esmtps (Exim 4.99.2 #2 (Red Hat Linux)) id 1xCXwE-00000005gkv-1G8k; Fri, 02 Oct 2026 07:44:20 +0000 X-SpamFilter-By: ArmorX SpamTrap 5.80 with qID 6927hnoL73646819, This message is accepted by code: ctloc85258 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=realtek.com; s=dkim; t=1790927029; bh=ri2HpUjT8qOrOMqbL2h+R1txn9sz+vfKeiacwgzeYJM=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Transfer-Encoding:Content-Type; b=sNQYpjxzr5zOue+wvwPKIHzThVYDGZfVfbCVZ9iI7uaCkFEnA9D1uLvYIjEGDyUr1 iKMd4tOpu1zWdA6qMKC44HVuZH1IPRvGjjLjHLxwclGGM2wkthyiEMlQHw1l7vs+Ne CbHrq/oTtDAtLyDP+GsMiEPoKRfNyeMxUqYDwHTkB4/C/lqRcfU0CnTOwVblAVbrrQ Vg8GnTiN+8r3IP6eVDbZ05N+k9DLpj4ovF1XRz77+ahT5zUn0fpS1PmpcNkf9TcA77 0lrhbv1Xxmqoyw2xr+qGtEFp1+ai0VhcGPq/Syn36j/9otCFwLbDGMNc43LhV2VTOU pbSrjonx4Pxqw== Received: from mail.realtek.com (rtkexhmbs03.realtek.com.tw[10.21.1.53]) by rtits2.realtek.com.tw (8.15.2/3.29/5.94) with ESMTPS id 6927hnoL73646819 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 2 Oct 2026 15:43:49 +0800 Received: from RTKEXHMBS06.realtek.com.tw (10.21.1.56) by RTKEXHMBS03.realtek.com.tw (10.21.1.53) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.49; Fri, 2 Oct 2026 15:43:33 +0800 Received: from cn1dhc-k02 (172.21.252.101) by RTKEXHMBS06.realtek.com.tw (10.21.1.56) with Microsoft SMTP Server id 15.2.2562.49 via Frontend Transport; Fri, 2 Oct 2026 15:43:33 +0800 From: Yu-Chun Lin To: , , , , , , , , , CC: , , , , , , , , , Brian Masney Subject: [PATCH v15 07/11] clk: realtek: Add support for mux clock Date: Fri, 2 Oct 2026 15:43:27 +0800 Message-ID: <20261002074331.3066919-8-eleanor.lin@realtek.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20261002074331.3066919-1-eleanor.lin@realtek.com> References: <20261002074331.3066919-1-eleanor.lin@realtek.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261002_084416_110677_22AB7F11 X-CRM114-Status: GOOD ( 17.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Cheng-Yu Lee Add a simple regmap-based clk_ops implementation for Realtek mux clocks. The implementation supports parent selection and rate determination through regmap-backed register access. Signed-off-by: Cheng-Yu Lee Co-developed-by: Yu-Chun Lin Signed-off-by: Yu-Chun Lin Reviewed-by: Brian Masney --- Changes in v15: - Simplify 'rtk_clk_regmap_mux_get_parent()' to return the result directly. --- drivers/clk/realtek/Makefile | 1 + drivers/clk/realtek/clk-regmap-mux.c | 38 ++++++++++++++++++++++++ drivers/clk/realtek/clk-regmap-mux.h | 43 ++++++++++++++++++++++++++++ 3 files changed, 82 insertions(+) create mode 100644 drivers/clk/realtek/clk-regmap-mux.c create mode 100644 drivers/clk/realtek/clk-regmap-mux.h diff --git a/drivers/clk/realtek/Makefile b/drivers/clk/realtek/Makefile index 840aff067b61..217ccaf5644a 100644 --- a/drivers/clk/realtek/Makefile +++ b/drivers/clk/realtek/Makefile @@ -4,4 +4,5 @@ obj-$(CONFIG_RTK_CLK_COMMON) += clk-rtk.o clk-rtk-y += clk-rtk-common.o clk-rtk-y += clk-pll.o clk-rtk-y += clk-regmap-gate.o +clk-rtk-y += clk-regmap-mux.o clk-rtk-y += freq_table.o diff --git a/drivers/clk/realtek/clk-regmap-mux.c b/drivers/clk/realtek/clk-regmap-mux.c new file mode 100644 index 000000000000..01017a90d0ef --- /dev/null +++ b/drivers/clk/realtek/clk-regmap-mux.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2017-2026 Realtek Semiconductor Corporation + * Author: Cheng-Yu Lee + */ + +#include +#include +#include +#include "clk-regmap-mux.h" + +static u8 rtk_clk_regmap_mux_get_parent(struct clk_hw *hw) +{ + struct rtk_clk_regmap_mux *clkm = to_rtk_clk_regmap_mux(hw); + u32 val; + int ret; + + ret = regmap_read(clkm->clkr.regmap, clkm->mux_ofs, &val); + if (ret) + return 0xff; + + return (val >> clkm->shift) & clkm->mask; +} + +static int rtk_clk_regmap_mux_set_parent(struct clk_hw *hw, u8 index) +{ + struct rtk_clk_regmap_mux *clkm = to_rtk_clk_regmap_mux(hw); + + return regmap_update_bits(clkm->clkr.regmap, clkm->mux_ofs, + clkm->mask << clkm->shift, (u32)index << clkm->shift); +} + +const struct clk_ops rtk_clk_regmap_mux_ops = { + .set_parent = rtk_clk_regmap_mux_set_parent, + .get_parent = rtk_clk_regmap_mux_get_parent, + .determine_rate = __clk_mux_determine_rate, +}; +EXPORT_SYMBOL_NS_GPL(rtk_clk_regmap_mux_ops, "CLK_REALTEK"); diff --git a/drivers/clk/realtek/clk-regmap-mux.h b/drivers/clk/realtek/clk-regmap-mux.h new file mode 100644 index 000000000000..ad524bb86a19 --- /dev/null +++ b/drivers/clk/realtek/clk-regmap-mux.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2017-2026 Realtek Semiconductor Corporation + * Author: Cheng-Yu Lee + */ + +#ifndef __CLK_REALTEK_CLK_REGMAP_MUX_H +#define __CLK_REALTEK_CLK_REGMAP_MUX_H + +#include "clk-rtk-common.h" + +struct rtk_clk_regmap_mux { + struct rtk_clk_regmap clkr; + unsigned int mux_ofs; + unsigned int mask; + unsigned int shift; +}; + +#define __rtk_clk_regmap_mux_hw(_p) __rtk_clk_regmap_hw(&(_p)->clkr) + +#define __RTK_CLK_REGMAP_MUX(_name, _parents, _ops, _flags, _ofs, _sft, _mask) \ + struct rtk_clk_regmap_mux _name = { \ + .clkr.hw.init = \ + CLK_HW_INIT_PARENTS(#_name, _parents, _ops, _flags), \ + .mux_ofs = _ofs, \ + .shift = _sft, \ + .mask = _mask, \ + } + +#define RTK_CLK_REGMAP_MUX(_name, _parents, _flags, _ofs, _sft, _mask) \ + __RTK_CLK_REGMAP_MUX(_name, _parents, &rtk_clk_regmap_mux_ops, _flags, _ofs, \ + _sft, _mask) + +static inline struct rtk_clk_regmap_mux *to_rtk_clk_regmap_mux(struct clk_hw *hw) +{ + struct rtk_clk_regmap *clkr = to_rtk_clk_regmap(hw); + + return container_of(clkr, struct rtk_clk_regmap_mux, clkr); +} + +extern const struct clk_ops rtk_clk_regmap_mux_ops; + +#endif /* __CLK_REALTEK_CLK_REGMAP_MUX_H */ -- 2.43.0