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6b767ccd3b
The HWMON_CHANNEL_INFO macro simplifies the code, reduces the likelihood
of errors, and makes the code easier to read.
The conversion was done automatically with coccinelle. The semantic patch
used to make this change is as follows.
@s@
identifier i,j,ty;
@@
-struct hwmon_channel_info j = {
- .type = ty,
- .config = i,
-};
@r@
initializer list elements;
identifier s.i;
@@
-u32 i[] = {
- elements,
- 0
-};
@script:ocaml t@
ty << s.ty;
elements << r.elements;
shorter;
elems;
@@
shorter :=
make_ident (List.hd(List.rev (Str.split (Str.regexp "_") ty)));
elems :=
make_ident
(String.concat ","
(List.map (fun x -> Printf.sprintf "\n\t\t\t %s" x)
(Str.split (Str.regexp " , ") elements)))
@@
identifier s.j,t.shorter;
identifier t.elems;
@@
- &j
+ HWMON_CHANNEL_INFO(shorter,elems)
This patch does not introduce functional changes. Many thanks to
Julia Lawall for providing the coccinelle script.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
135 lines
2.8 KiB
C
135 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Synaptics AS370 SoC Hardware Monitoring Driver
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*
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* Copyright (C) 2018 Synaptics Incorporated
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* Author: Jisheng Zhang <jszhang@kernel.org>
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*/
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#include <linux/bitops.h>
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#include <linux/hwmon.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#define CTRL 0x0
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#define PD BIT(0)
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#define EN BIT(1)
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#define T_SEL BIT(2)
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#define V_SEL BIT(3)
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#define NMOS_SEL BIT(8)
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#define PMOS_SEL BIT(9)
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#define STS 0x4
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#define BN_MASK GENMASK(11, 0)
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#define EOC BIT(12)
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struct as370_hwmon {
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void __iomem *base;
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};
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static void init_pvt(struct as370_hwmon *hwmon)
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{
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u32 val;
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void __iomem *addr = hwmon->base + CTRL;
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val = PD;
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writel_relaxed(val, addr);
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val |= T_SEL;
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writel_relaxed(val, addr);
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val |= EN;
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writel_relaxed(val, addr);
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val &= ~PD;
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writel_relaxed(val, addr);
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}
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static int as370_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *temp)
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{
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int val;
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struct as370_hwmon *hwmon = dev_get_drvdata(dev);
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switch (attr) {
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case hwmon_temp_input:
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val = readl_relaxed(hwmon->base + STS) & BN_MASK;
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*temp = DIV_ROUND_CLOSEST(val * 251802, 4096) - 85525;
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break;
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default:
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static umode_t
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as370_hwmon_is_visible(const void *data, enum hwmon_sensor_types type,
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u32 attr, int channel)
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{
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if (type != hwmon_temp)
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return 0;
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switch (attr) {
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case hwmon_temp_input:
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return 0444;
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default:
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return 0;
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}
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}
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static const struct hwmon_channel_info *as370_hwmon_info[] = {
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HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT),
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NULL
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};
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static const struct hwmon_ops as370_hwmon_ops = {
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.is_visible = as370_hwmon_is_visible,
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.read = as370_hwmon_read,
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};
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static const struct hwmon_chip_info as370_chip_info = {
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.ops = &as370_hwmon_ops,
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.info = as370_hwmon_info,
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};
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static int as370_hwmon_probe(struct platform_device *pdev)
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{
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struct device *hwmon_dev;
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struct as370_hwmon *hwmon;
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struct device *dev = &pdev->dev;
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hwmon = devm_kzalloc(dev, sizeof(*hwmon), GFP_KERNEL);
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if (!hwmon)
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return -ENOMEM;
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hwmon->base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(hwmon->base))
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return PTR_ERR(hwmon->base);
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init_pvt(hwmon);
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hwmon_dev = devm_hwmon_device_register_with_info(dev,
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"as370",
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hwmon,
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&as370_chip_info,
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NULL);
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return PTR_ERR_OR_ZERO(hwmon_dev);
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}
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static const struct of_device_id as370_hwmon_match[] = {
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{ .compatible = "syna,as370-hwmon" },
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{},
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};
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MODULE_DEVICE_TABLE(of, as370_hwmon_match);
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static struct platform_driver as370_hwmon_driver = {
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.probe = as370_hwmon_probe,
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.driver = {
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.name = "as370-hwmon",
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.of_match_table = as370_hwmon_match,
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},
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};
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module_platform_driver(as370_hwmon_driver);
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MODULE_AUTHOR("Jisheng Zhang<jszhang@kernel.org>");
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MODULE_DESCRIPTION("Synaptics AS370 SoC hardware monitor");
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MODULE_LICENSE("GPL v2");
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