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5f68d0785e
The thermal zone device structure is exposed to the different drivers and obviously they access the internals while that should be restricted to the core thermal code. In order to self-encapsulate the thermal core code, we need to prevent the drivers accessing directly the thermal zone structure and provide accessor functions to deal with. Use the devdata accessor introduced in the previous patch. No functional changes intended. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> #R-Car Acked-by: Mark Brown <broonie@kernel.org> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> #MediaTek auxadc and lvts Reviewed-by: Balsam CHIHI <bchihi@baylibre.com> #Mediatek lvts Reviewed-by: Adam Ward <DLG-Adam.Ward.opensource@dm.renesas.com> #da9062 Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> #spread Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> #sun8i_thermal Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> #Broadcom Reviewed-by: Dhruva Gole <d-gole@ti.com> # K3 bandgap Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Heiko Stuebner <heiko@sntech.de> #rockchip Reviewed-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> #uniphier Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018 Broadcom
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*/
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/thermal.h>
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/*
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* In stingray thermal IO memory,
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* Total Number of available TMONs MASK is at offset 0
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* temperature registers BASE is at 4 byte offset.
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* Each TMON temperature register size is 4.
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*/
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#define SR_TMON_TEMP_BASE(id) ((id) * 0x4)
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#define SR_TMON_MAX_LIST 6
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struct sr_tmon {
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unsigned int crit_temp;
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unsigned int tmon_id;
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struct sr_thermal *priv;
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};
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struct sr_thermal {
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void __iomem *regs;
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unsigned int max_crit_temp;
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struct sr_tmon tmon[SR_TMON_MAX_LIST];
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};
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static int sr_get_temp(struct thermal_zone_device *tz, int *temp)
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{
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struct sr_tmon *tmon = thermal_zone_device_priv(tz);
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struct sr_thermal *sr_thermal = tmon->priv;
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*temp = readl(sr_thermal->regs + SR_TMON_TEMP_BASE(tmon->tmon_id));
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return 0;
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}
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static const struct thermal_zone_device_ops sr_tz_ops = {
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.get_temp = sr_get_temp,
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};
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static int sr_thermal_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct thermal_zone_device *tz;
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struct sr_thermal *sr_thermal;
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struct sr_tmon *tmon;
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struct resource *res;
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u32 sr_tmon_list = 0;
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unsigned int i;
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int ret;
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sr_thermal = devm_kzalloc(dev, sizeof(*sr_thermal), GFP_KERNEL);
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if (!sr_thermal)
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return -ENOMEM;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -ENOENT;
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sr_thermal->regs = (void __iomem *)devm_memremap(&pdev->dev, res->start,
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resource_size(res),
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MEMREMAP_WB);
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if (IS_ERR(sr_thermal->regs)) {
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dev_err(dev, "failed to get io address\n");
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return PTR_ERR(sr_thermal->regs);
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}
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ret = device_property_read_u32(dev, "brcm,tmon-mask", &sr_tmon_list);
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if (ret)
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return ret;
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tmon = sr_thermal->tmon;
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for (i = 0; i < SR_TMON_MAX_LIST; i++, tmon++) {
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if (!(sr_tmon_list & BIT(i)))
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continue;
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/* Flush temperature registers */
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writel(0, sr_thermal->regs + SR_TMON_TEMP_BASE(i));
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tmon->tmon_id = i;
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tmon->priv = sr_thermal;
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tz = devm_thermal_of_zone_register(dev, i, tmon,
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&sr_tz_ops);
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if (IS_ERR(tz))
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return PTR_ERR(tz);
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dev_dbg(dev, "thermal sensor %d registered\n", i);
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}
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platform_set_drvdata(pdev, sr_thermal);
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return 0;
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}
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static const struct of_device_id sr_thermal_of_match[] = {
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{ .compatible = "brcm,sr-thermal", },
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{},
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};
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MODULE_DEVICE_TABLE(of, sr_thermal_of_match);
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static struct platform_driver sr_thermal_driver = {
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.probe = sr_thermal_probe,
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.driver = {
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.name = "sr-thermal",
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.of_match_table = sr_thermal_of_match,
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},
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};
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module_platform_driver(sr_thermal_driver);
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MODULE_AUTHOR("Pramod Kumar <pramod.kumar@broadcom.com>");
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MODULE_DESCRIPTION("Stingray thermal driver");
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MODULE_LICENSE("GPL v2");
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