From patchwork Thu Jul 27 11:10:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abhishek Sahu X-Patchwork-Id: 9866611 X-Patchwork-Delegate: sboyd@codeaurora.org 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 0C9D46038C for ; Thu, 27 Jul 2017 11:11:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F384928758 for ; Thu, 27 Jul 2017 11:11:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E8551287C8; Thu, 27 Jul 2017 11:11:49 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7AF4128758 for ; Thu, 27 Jul 2017 11:11:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751716AbdG0LLV (ORCPT ); Thu, 27 Jul 2017 07:11:21 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:58774 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751701AbdG0LLS (ORCPT ); Thu, 27 Jul 2017 07:11:18 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id C01F96089A; Thu, 27 Jul 2017 11:11:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1501153877; bh=MwrXC1+vlqUr+QtpEJcgMnRohh1P6vJqABnMdx4IEW0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hvMgSnii1JDn7Cii2wa9iy2HD0GoHpbcpfP2YEnMjCxlcBmu7jZLsIilPuKWCHH4Y 2YdD7y6Adda1BJU14QNDJucha5/VZyPtytMgyr+z46Qn60YBZX4Mzn6qrw95SnhfkB QWnuosgd0PAGmvTFhgJKIvlPmpkPzd0JqsSEmdMM= Received: from absahu-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: absahu@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 32F5D60908; Thu, 27 Jul 2017 11:11:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1501153877; bh=MwrXC1+vlqUr+QtpEJcgMnRohh1P6vJqABnMdx4IEW0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hvMgSnii1JDn7Cii2wa9iy2HD0GoHpbcpfP2YEnMjCxlcBmu7jZLsIilPuKWCHH4Y 2YdD7y6Adda1BJU14QNDJucha5/VZyPtytMgyr+z46Qn60YBZX4Mzn6qrw95SnhfkB QWnuosgd0PAGmvTFhgJKIvlPmpkPzd0JqsSEmdMM= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 32F5D60908 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=absahu@codeaurora.org From: Abhishek Sahu To: sboyd@codeaurora.org, mturquette@baylibre.com Cc: andy.gross@linaro.org, david.brown@linaro.org, rnayak@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Abhishek Sahu Subject: [RFC 10/12] clk: qcom: add read-only divider operations Date: Thu, 27 Jul 2017 16:40:23 +0530 Message-Id: <1501153825-5181-11-git-send-email-absahu@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1501153825-5181-1-git-send-email-absahu@codeaurora.org> References: <1501153825-5181-1-git-send-email-absahu@codeaurora.org> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some of the divider settings are preconfigured and should not be changed by the clock framework during frequency change. This patch adds the read-only divider operation for QCOM dividers which is equivalent to generic divider operations in 'commit 79c6ab509558 ("clk: divider: add CLK_DIVIDER_READ_ONLY flag")'. Signed-off-by: Abhishek Sahu --- drivers/clk/qcom/clk-regmap-divider.c | 29 +++++++++++++++++++++++++++++ drivers/clk/qcom/clk-regmap-divider.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/clk/qcom/clk-regmap-divider.c b/drivers/clk/qcom/clk-regmap-divider.c index 5348491..6cf9005 100644 --- a/drivers/clk/qcom/clk-regmap-divider.c +++ b/drivers/clk/qcom/clk-regmap-divider.c @@ -23,6 +23,29 @@ static inline struct clk_regmap_div *to_clk_regmap_div(struct clk_hw *hw) return container_of(to_clk_regmap(hw), struct clk_regmap_div, clkr); } +static long div_round_ro_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + struct clk_regmap_div *divider = to_clk_regmap_div(hw); + struct clk_regmap *clkr = ÷r->clkr; + u32 div; + struct clk_hw *hw_parent = clk_hw_get_parent(hw); + + regmap_read(clkr->regmap, divider->reg, &div); + div >>= divider->shift; + div &= BIT(divider->width) - 1; + div += 1; + + if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) { + if (!hw_parent) + return -EINVAL; + + *prate = clk_hw_round_rate(hw_parent, rate * div); + } + + return DIV_ROUND_UP_ULL((u64)*prate, div); +} + static long div_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *prate) { @@ -68,3 +91,9 @@ static unsigned long div_recalc_rate(struct clk_hw *hw, .recalc_rate = div_recalc_rate, }; EXPORT_SYMBOL_GPL(clk_regmap_div_ops); + +const struct clk_ops clk_regmap_div_ro_ops = { + .round_rate = div_round_ro_rate, + .recalc_rate = div_recalc_rate, +}; +EXPORT_SYMBOL_GPL(clk_regmap_div_ro_ops); diff --git a/drivers/clk/qcom/clk-regmap-divider.h b/drivers/clk/qcom/clk-regmap-divider.h index fc4492e..8c39c27 100644 --- a/drivers/clk/qcom/clk-regmap-divider.h +++ b/drivers/clk/qcom/clk-regmap-divider.h @@ -25,5 +25,6 @@ struct clk_regmap_div { }; extern const struct clk_ops clk_regmap_div_ops; +extern const struct clk_ops clk_regmap_div_ro_ops; #endif