linux-kernel - Re: [PATCH v6 1/7] thermal: sun8i: add thermal driver for H6/H5/H3/A64/A83T/R40

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Date:   Thu, 28 Nov 2019 03:44:38 +0800
From:   Frank Lee <tiny.windzz@...il.com>
To:     Maxime Ripard <mripard@...nel.org>
Cc:     Vasily Khoruzhick <anarsoul@...il.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Eduardo Valentin <edubezval@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amit.kucheria@...durent.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chen-Yu Tsai <wens@...e.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 1/7] thermal: sun8i: add thermal driver for H6/H5/H3/A64/A83T/R40

Hello Vasily,

Thank you very much for your work on this.
This looks good to me.

By the way, I would like to ask comments about adding the following code.


diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index c0ed60782b11..579dde5e0701 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -629,11 +629,63 @@ static const struct of_device_id of_ths_match[] = {
 };
 MODULE_DEVICE_TABLE(of, of_ths_match);

+static int __maybe_unused sun8i_thermal_suspend(struct device *dev)
+{
+ struct ths_device *tmdev; = dev_get_drvdata(dev);
+
+ clk_disable(tmdev->mod_clk);
+ clk_disable(tmdev->bus_clk);
+
+ reset_control_assert(tmdev->reset);
+
+ return 0;
+}
+
+static int __maybe_unused sun8i_thermal_resume(struct device *dev)
+{
+ struct ths_device *tmdev; = dev_get_drvdata(dev);
+ int error;
+
+ error = reset_control_deassert(tmdev->reset);
+ if (error)
+ return error;
+
+ error = clk_enable(tmdev->bus_clk);
+ if (error)
+ goto assert_reset;
+
+ clk_set_rate(tmdev->mod_clk, 24000000);
+ error = clk_enable(tmdev->mod_clk);
+ if (error)
+ goto bus_disable;
+
+ sun8i_ths_calibrate(tmdev);
+
+ ret = tmdev->chip->init(tmdev);
+ if (ret)
+ goto mod_disable;
+
+ return 0;
+
+mod_disable:
+ clk_disable(tmdev->mod_clk);
+bus_disable:
+ clk_disable(tmdev->bus_clk);
+assert_reset:
+ reset_control_assert(tmdev->reset);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(sun8i_thermal_pm_ops,
+ sun8i_thermal_suspend, sun8i_thermal_resume);
+
 static struct platform_driver ths_driver = {
  .probe = sun8i_ths_probe,
  .remove = sun8i_ths_remove,
  .driver = {
  .name = "sun8i-thermal",
+ .pm = &sun8i_thermal_pm_ops,
  .of_match_table = of_ths_match,
  },
 };

Yangtao