From: Rajendra Nayak <rnayak@codeaurora.org>
To: Akash Asthana <akashast@codeaurora.org>,
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, linux-serial@vger.kernel.org
Subject: Re: [PATCH 02/21] tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state
Date: Mon, 13 Apr 2020 19:43:16 +0530 [thread overview]
Message-ID: <d9b3ebcb-90b0-c596-3832-2669bdb35b9b@codeaurora.org> (raw)
In-Reply-To: <5eb6c05e-893a-ef8a-c53e-a775b2f837d1@codeaurora.org>
[]..
>> @@ -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);
> do we need to call "dev_pm_opp_put_clkname" here and in remove to release clk resource grabbed by
>
> dev_pm_opp_set_clkname(&pdev->dev, "se");?
Thanks for catching this, I did indeed try to call dev_pm_opp_put_clkname() but the way clk_put
is handled in it seems buggy. I need to go back and fix it. Besides I realized dev_pm_opp_of_remove_table()
does go ahead and do a clk_put on the clock.
Viresh, whats the right way to clean up
>> + port->se.opp = dev_pm_opp_set_clkname(&pdev->dev, "se");
>> + dev_pm_opp_of_add_table(&pdev->dev);
is it
1. dev_pm_opp_of_remove_table()
dev_pm_opp_put_clkname()
or
2. dev_pm_opp_put_clkname()
dev_pm_opp_of_remove_table()
or, what this patch is currently doing, which is just calling dev_pm_opp_of_remove_table()?
Note that both 1. and 2. today result in a crash, since they don't handle clk_put very well.
I can send in a fix if you think dev_pm_opp_put_clkname is needed and in a certain order.
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2020-04-13 14:13 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-08 13:46 [PATCH 00/21] DVFS for IO devices on sdm845 and sc7180 Rajendra Nayak
2020-04-08 13:46 ` [PATCH 01/21] opp: Manage empty OPP tables with clk handle Rajendra Nayak
2020-04-09 7:57 ` Viresh Kumar
2020-04-13 10:34 ` Rajendra Nayak
2020-04-13 10:42 ` Viresh Kumar
2020-04-14 6:57 ` Viresh Kumar
2020-04-08 13:46 ` [PATCH 02/21] tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state Rajendra Nayak
2020-04-09 17:45 ` Matthias Kaehlcke
2020-04-10 8:36 ` Jun Nie
2020-04-13 14:22 ` Rajendra Nayak
2020-04-14 5:26 ` Jun Nie
2020-04-13 13:58 ` Rajendra Nayak
2020-04-10 6:56 ` Akash Asthana
2020-04-10 12:52 ` Akash Asthana
2020-04-13 14:13 ` Rajendra Nayak [this message]
2020-04-08 13:46 ` [PATCH 03/21] spi: spi-geni-qcom: " Rajendra Nayak
2020-04-09 18:20 ` Matthias Kaehlcke
2020-04-13 14:02 ` Rajendra Nayak
2020-04-08 13:46 ` [PATCH 04/21] arm64: dts: sdm845: Add OPP table for all qup devices Rajendra Nayak
2020-04-08 13:46 ` [PATCH 05/21] arm64: dts: sc7180: " Rajendra Nayak
2020-04-08 13:46 ` [PATCH 06/21] scsi: ufs: Add support to manage multiple power domains in ufshcd-pltfrm Rajendra Nayak
2020-04-08 13:46 ` [PATCH 07/21] scsi: ufs: Add support for specifying OPP tables in DT Rajendra Nayak
2020-04-08 13:46 ` [PATCH 08/21] arm64: dts: sdm845: Add ufs opps and power-domains Rajendra Nayak
2020-04-08 13:46 ` [PATCH 09/21] drm/msm/dpu: Use OPP API to set clk/perf state Rajendra Nayak
2020-04-08 13:46 ` [PATCH 10/21] drm/msm: dsi: " Rajendra Nayak
2020-04-08 13:46 ` [PATCH 11/21] arm64: dts: sdm845: Add DSI and MDP OPP tables and power-domains Rajendra Nayak
2020-04-08 13:46 ` [PATCH 12/21] arm64: dts: sc7180: " Rajendra Nayak
2020-04-08 13:46 ` [PATCH 13/21] mmc: sdhci-msm: Use OPP API to set clk/perf state Rajendra Nayak
2020-04-15 13:52 ` Ulf Hansson
2020-04-15 16:43 ` Rajendra Nayak
2020-04-16 3:39 ` Viresh Kumar
2020-04-16 8:21 ` Ulf Hansson
2020-04-16 8:23 ` Ulf Hansson
2020-04-08 13:46 ` [PATCH 14/21] arm64: dts: sdm845: Add sdhc opps and power-domains Rajendra Nayak
2020-04-08 13:46 ` [PATCH 15/21] arm64: dts: sc7180: " Rajendra Nayak
2020-04-08 13:46 ` [PATCH 16/21] media: venus: core: Add support for opp tables/perf voting Rajendra Nayak
2020-04-08 13:46 ` [PATCH 17/21] arm64: dts: sdm845: Add OPP tables and power-domains for venus Rajendra Nayak
2020-04-08 13:46 ` [PATCH 18/21] arm64: dts: sc7180: " Rajendra Nayak
2020-04-08 13:46 ` [PATCH 19/21] spi: spi-qcom-qspi: Use OPP API to set clk/perf state Rajendra Nayak
2020-04-08 13:46 ` [PATCH 20/21] arm64: dts: sdm845: Add qspi opps and power-domains Rajendra Nayak
2020-04-08 13:46 ` [PATCH 21/21] arm64: dts: sc7180: " Rajendra Nayak
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