From patchwork Thu Feb 15 12:49:49 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 10221131 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C855D60467 for ; Thu, 15 Feb 2018 12:53:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B91C729025 for ; Thu, 15 Feb 2018 12:53:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id AD8F7290A6; Thu, 15 Feb 2018 12:53:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8C50C29025 for ; Thu, 15 Feb 2018 12:53:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=bEi2TCGWDBrgZkr5E0ge8gaa0C0ysSV3L/bBmHXi7uc=; b=afbxgvrzctBnVK 7A4ILJMc1e90rNXsFrH16QVh6LaqIGcnrn0GF4Ac8wAej5RcsR6LF7ejMYZ/bGt1HJ+YbeCuEaSU0 DD83VONsZ4FNZUEcjiCyNz146CoG09cbm1xobdSRwDv3PJKdp9EAPF+ijJwefSqNg+YOveNQtjDLi SRUOn/GAtYfhaUJ4SGz6N5T3NVHXZgNxzglZW9YMgMnfvR4TXVVaZmx7sdM1lic2HBSVri0QZoRAw pnTvY/yG8ETTCHsPhXfeR2+qDgol4/qa2H4sUvCxnoOHEDeAg5O4eMzlUkcrHnwpyQ50qhuWH/nXe I+WtyTm8SHGqgblsnvWg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1emJ29-0003Ri-4h; Thu, 15 Feb 2018 12:53:05 +0000 Received: from lelnx193.ext.ti.com ([198.47.27.77]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1emIzw-00022J-8K for linux-arm-kernel@lists.infradead.org; Thu, 15 Feb 2018 12:50:58 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by lelnx193.ext.ti.com (8.15.1/8.15.1) with ESMTP id w1FCoXjF016586; Thu, 15 Feb 2018 06:50:33 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1518699033; bh=nO9o+CTZYPN96Bjucl1B4bwNvPkrNh6Y8Rz51aGsZWE=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=xJ5h1NM94P7mz4LvEYRwauufu0wmnl0kHYXrIeOrBv6h/x8XiVZXMFPxnbgtoB6BY oms6D9j6oJqQ/1eKn/ZpjBBmCte6+ifhaeQFThMQ4ZtUY7VCNEhHr2OwAhZfpdBZZ5 Jzxaj0W8bJA2mCPL4tNDbanqZMd/Cam49CaC7XQs= Received: from DFLE101.ent.ti.com (dfle101.ent.ti.com [10.64.6.22]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id w1FCoWnk012400; Thu, 15 Feb 2018 06:50:33 -0600 Received: from DFLE109.ent.ti.com (10.64.6.30) by DFLE101.ent.ti.com (10.64.6.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1261.35; Thu, 15 Feb 2018 06:50:32 -0600 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1261.35 via Frontend Transport; Thu, 15 Feb 2018 06:50:32 -0600 Received: from gomoku.home (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id w1FCoKZF020487; Thu, 15 Feb 2018 06:50:30 -0600 From: Tero Kristo To: , , , , , Subject: [PATCH 3/5] clk: ti: add generic support for clock latching Date: Thu, 15 Feb 2018 14:49:49 +0200 Message-ID: <1518698991-10099-4-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1518698991-10099-1-git-send-email-t-kristo@ti.com> References: <1518698991-10099-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180215_045048_581618_86119C56 X-CRM114-Status: GOOD ( 17.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tony@atomide.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Certain clocks require latching to be done, so that the actual settings get updated on the HW that generates the clock signal. One example of such a clock is the dra76x GMAC DPLL H14 output, which requires its divider settings to be latched when updated. Signed-off-by: Tero Kristo --- drivers/clk/ti/clk.c | 14 ++++++++++++++ drivers/clk/ti/clock.h | 2 ++ 2 files changed, 16 insertions(+) diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c index 4efa2c9..7d22e1a 100644 --- a/drivers/clk/ti/clk.c +++ b/drivers/clk/ti/clk.c @@ -275,6 +275,20 @@ int ti_clk_get_reg_addr(struct device_node *node, int index, return 0; } +void ti_clk_latch(struct clk_omap_reg *reg, s8 shift) +{ + u32 latch; + + if (shift < 0) + return; + + latch = 1 << shift; + + ti_clk_ll_ops->clk_rmw(latch, latch, reg); + ti_clk_ll_ops->clk_rmw(0, latch, reg); + ti_clk_ll_ops->clk_readl(reg); /* OCP barrier */ +} + /** * omap2_clk_provider_init - init master clock provider * @parent: master node diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h index d9b43bf..2f8af8f 100644 --- a/drivers/clk/ti/clock.h +++ b/drivers/clk/ti/clock.h @@ -194,6 +194,8 @@ struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw, int ti_clk_add_alias(struct device *dev, struct clk *clk, const char *con); void ti_clk_add_aliases(void); +void ti_clk_latch(struct clk_omap_reg *reg, s8 shift); + struct clk_hw *ti_clk_build_component_mux(struct ti_clk_mux *setup); int ti_clk_parse_divider_data(int *div_table, int num_dividers, int max_div,