From patchwork Wed Apr 8 13:46:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajendra Nayak X-Patchwork-Id: 189696 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=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 864D1C2BA80 for ; Wed, 8 Apr 2020 13:47:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D14A20780 for ; Wed, 8 Apr 2020 13:47:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="rJ3weaUI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728954AbgDHNrT (ORCPT ); Wed, 8 Apr 2020 09:47:19 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:28358 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729204AbgDHNrT (ORCPT ); Wed, 8 Apr 2020 09:47:19 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1586353638; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=iKkjkOaZz7edJymZbW0Z/el4gdP6KUIZXi4UPrphlE4=; b=rJ3weaUImSAAvAl5ofHtUw3BTCefj2Yak2HAjy4NvFFneq/weXKE2vYD4M404j+PQ9VxbnNh ey9ddJ66zFTt3TzMlQmBHX8vysuyucgeO3snGPjWit5vpWefn0xcyhazAwXFeapznlO1zQRz tSBStHs8WDxsnmHSgC8Zu52Vf4o= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e8dd5e6.7f39881cdb90-smtp-out-n01; Wed, 08 Apr 2020 13:47:18 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id B995CC433D2; Wed, 8 Apr 2020 13:47:16 +0000 (UTC) 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) by smtp.codeaurora.org (Postfix) with ESMTPSA id 32149C433F2; Wed, 8 Apr 2020 13:47:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 32149C433F2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=rnayak@codeaurora.org From: Rajendra Nayak To: viresh.kumar@linaro.org, sboyd@kernel.org, bjorn.andersson@linaro.org, agross@kernel.org Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Rajendra Nayak , Akash Asthana , linux-serial@vger.kernel.org Subject: [PATCH 02/21] tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state Date: Wed, 8 Apr 2020 19:16:28 +0530 Message-Id: <1586353607-32222-3-git-send-email-rnayak@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1586353607-32222-1-git-send-email-rnayak@codeaurora.org> References: <1586353607-32222-1-git-send-email-rnayak@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org 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 Cc: Akash Asthana Cc: linux-serial@vger.kernel.org --- drivers/tty/serial/qcom_geni_serial.c | 20 +++++++++++++++----- include/linux/qcom-geni-se.h | 2 ++ 2 files changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 6119090..754eaf6 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -961,7 +962,7 @@ 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(uport->dev, clk_rate); ser_clk_cfg = SER_CLK_EN; ser_clk_cfg |= clk_div << CLK_DIV_SHFT; @@ -1198,8 +1199,10 @@ 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(uport->dev, 0); geni_se_resources_off(&port->se); + } } static const struct uart_ops qcom_geni_console_pops = { @@ -1318,13 +1321,16 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) if (of_property_read_bool(pdev->dev.of_node, "cts-rts-swap")) port->cts_rts_swap = true; + port->se.opp = dev_pm_opp_set_clkname(&pdev->dev, "se"); + dev_pm_opp_of_add_table(&pdev->dev); + uport->private_data = drv; platform_set_drvdata(pdev, port); port->handle_rx = console ? handle_rx_console : handle_rx_uart; ret = uart_add_one_port(drv, uport); if (ret) - return ret; + goto err; irq_set_status_flags(uport->irq, IRQ_NOAUTOEN); ret = devm_request_irq(uport->dev, uport->irq, qcom_geni_serial_isr, @@ -1332,7 +1338,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) if (ret) { dev_err(uport->dev, "Failed to get IRQ ret %d\n", ret); uart_remove_one_port(drv, uport); - return ret; + goto err; } /* @@ -1349,11 +1355,14 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) if (ret) { device_init_wakeup(&pdev->dev, false); uart_remove_one_port(drv, uport); - return ret; + goto err; } } return 0; +err: + dev_pm_opp_of_remove_table(&pdev->dev); + return ret; } static int qcom_geni_serial_remove(struct platform_device *pdev) @@ -1361,6 +1370,7 @@ static int qcom_geni_serial_remove(struct platform_device *pdev) struct qcom_geni_serial_port *port = platform_get_drvdata(pdev); struct uart_driver *drv = port->uport.private_data; + dev_pm_opp_of_remove_table(&pdev->dev); dev_pm_clear_wake_irq(&pdev->dev); device_init_wakeup(&pdev->dev, false); uart_remove_one_port(drv, &port->uport); diff --git a/include/linux/qcom-geni-se.h b/include/linux/qcom-geni-se.h index dd46494..737e713 100644 --- a/include/linux/qcom-geni-se.h +++ b/include/linux/qcom-geni-se.h @@ -24,6 +24,7 @@ enum geni_se_protocol_type { struct geni_wrapper; struct clk; +struct opp_table; /** * struct geni_se - GENI Serial Engine @@ -39,6 +40,7 @@ struct geni_se { struct device *dev; struct geni_wrapper *wrapper; struct clk *clk; + struct opp_table *opp; unsigned int num_clk_levels; unsigned long *clk_perf_tbl; };