From patchwork Wed Mar 20 09:49:10 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajendra Nayak X-Patchwork-Id: 10861123 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A8E711708 for ; Wed, 20 Mar 2019 09:49:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8D68029A2F for ; Wed, 20 Mar 2019 09:49:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8B848299C9; Wed, 20 Mar 2019 09:49:53 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham 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 1FE6E29A87 for ; Wed, 20 Mar 2019 09:49:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727616AbfCTJtw (ORCPT ); Wed, 20 Mar 2019 05:49:52 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:50436 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725996AbfCTJtt (ORCPT ); Wed, 20 Mar 2019 05:49:49 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id E70856118C; Wed, 20 Mar 2019 09:49:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1553075387; bh=IV7tUmqAOcOybIWc52/kxVT+D89R6Hy8mjlfXdDcBx8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N4ewvYYjEq5SNt+QfxgbKWj219wZqEDViPQ9LMDO/hZlHAvM+pvDYpY+l2nRbmi5c jzuMDcKVEWgdd2KKw4Ep6E5Panyjj2VD7jv56/XP4idM+KULM+NR1Jszo8lk/9JzYR m8TNGt9bBmU1pfvYHbpFSohjpmArUWdVO2sOlysk= Received: from blr-ubuntu-173.qualcomm.com (blr-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: rnayak@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 9F21360FEA; Wed, 20 Mar 2019 09:49:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1553075387; bh=IV7tUmqAOcOybIWc52/kxVT+D89R6Hy8mjlfXdDcBx8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N4ewvYYjEq5SNt+QfxgbKWj219wZqEDViPQ9LMDO/hZlHAvM+pvDYpY+l2nRbmi5c jzuMDcKVEWgdd2KKw4Ep6E5Panyjj2VD7jv56/XP4idM+KULM+NR1Jszo8lk/9JzYR m8TNGt9bBmU1pfvYHbpFSohjpmArUWdVO2sOlysk= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 9F21360FEA 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=rnayak@codeaurora.org From: Rajendra Nayak To: linux-kernel@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-serial@vger.kernel.org, linux-spi@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-scsi@vger.kernel.org, swboyd@chromium.org, ulf.hansson@linaro.org, viresh.kumar@linaro.org, dianders@chromium.org, rafael@kernel.org, Rajendra Nayak Subject: [RFC v2 03/11] tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state Date: Wed, 20 Mar 2019 15:19:10 +0530 Message-Id: <20190320094918.20234-4-rnayak@codeaurora.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190320094918.20234-1-rnayak@codeaurora.org> References: <20190320094918.20234-1-rnayak@codeaurora.org> MIME-Version: 1.0 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP geni serial needs to express a perforamnce state requirement on CX depending on the frequency of the clock rates. Use OPP table from DT to register with OPP framework and use dev_pm_opp_set_rate() to set the clk/perf state. Signed-off-by: Rajendra Nayak Signed-off-by: Stephen Boyd --- drivers/tty/serial/qcom_geni_serial.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 3bcec1c20219..422852911141 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -115,6 +116,7 @@ struct qcom_geni_serial_port { bool brk; unsigned int tx_remaining; + struct device *dev; }; static const struct uart_ops qcom_geni_console_pops; @@ -961,7 +963,7 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport, goto out_restart_rx; uport->uartclk = clk_rate; - clk_set_rate(port->se.clk, clk_rate); + dev_pm_opp_set_rate(port->dev, clk_rate); ser_clk_cfg = SER_CLK_EN; ser_clk_cfg |= clk_div << CLK_DIV_SHFT; @@ -1198,8 +1200,10 @@ static void qcom_geni_serial_pm(struct uart_port *uport, if (new_state == UART_PM_STATE_ON && old_state == UART_PM_STATE_OFF) geni_se_resources_on(&port->se); else if (new_state == UART_PM_STATE_OFF && - old_state == UART_PM_STATE_ON) + old_state == UART_PM_STATE_ON) { + dev_pm_opp_set_rate(port->dev, 0); geni_se_resources_off(&port->se); + } } static const struct uart_ops qcom_geni_console_pops = { @@ -1265,6 +1269,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Invalid line %d\n", line); return PTR_ERR(port); } + port->dev = &pdev->dev; uport = &port->uport; /* Don't allow 2 drivers to access the same port */ @@ -1286,6 +1291,12 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) return -EINVAL; uport->mapbase = res->start; + ret = dev_pm_opp_of_add_table(&pdev->dev); + if (ret < 0) { + dev_err(&pdev->dev, "failed to init OPP table: %d\n", ret); + return ret; + } + port->tx_fifo_depth = DEF_FIFO_DEPTH_WORDS; port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS; port->tx_fifo_width = DEF_FIFO_WIDTH_BITS;