treewide: refresh kmalloc_obj() conversionsgrafted

This is another run of the Coccinelle script for converting kmalloc()
family of allocations to kmalloc_obj() via the existing rules in
scripts/coccinelle/api/kmalloc_objs.cocci

This catches both the set of kmalloc() uses added since the first
kmalloc_obj() conversions in v7.0 and adds a large group missed in the
first pass due to Coccinelle not interacting well with the cleanup.h
scoped_...() family of macros[1]. I worked around this with spatch's
"--macro-file" argument to a file with all the scoped_...() macros mapped
to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control
flow indicator I could find.

Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc,
riscv, and s390 with no new warnings.

Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1]
Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2]
Signed-off-by: Kees Cook <kees+treewide@kernel.org>

1 files changed, 221 insertions, 0 deletions

diff --git a/drivers/hwmon/max77705-hwmon.c b/drivers/hwmon/max77705-hwmon.c
new file mode 100644
index 000000000..990023e64
--- /dev/null
+++ b/drivers/hwmon/max77705-hwmon.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  MAX77705 voltage and current hwmon driver.
+ *
+ *  Copyright (C) 2025 Dzmitry Sankouski <dsankouski@gmail.com>
+ */
+
+#include <linux/err.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/hwmon.h>
+#include <linux/kernel.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+struct channel_desc {
+	u8 reg;
+	u8 avg_reg;
+	const char *const label;
+	// register resolution. nano Volts for voltage, nano Amperes for current
+	u32 resolution;
+};
+
+static const struct channel_desc current_channel_desc[] = {
+	{
+		.reg = IIN_REG,
+		.label = "IIN_REG",
+		.resolution = 125000
+	},
+	{
+		.reg = ISYS_REG,
+		.avg_reg = AVGISYS_REG,
+		.label = "ISYS_REG",
+		.resolution = 312500
+	}
+};
+
+static const struct channel_desc voltage_channel_desc[] = {
+	{
+		.reg = VBYP_REG,
+		.label = "VBYP_REG",
+		.resolution = 427246
+	},
+	{
+		.reg = VSYS_REG,
+		.label = "VSYS_REG",
+		.resolution = 156250
+	}
+};
+
+static int max77705_read_and_convert(struct regmap *regmap, u8 reg, u32 res,
+				     bool is_signed, long *val)
+{
+	int ret;
+	u32 regval;
+
+	ret = regmap_read(regmap, reg, &regval);
+	if (ret < 0)
+		return ret;
+
+	if (is_signed)
+		*val = mult_frac((long)sign_extend32(regval, 15), res, 1000000);
+	else
+		*val = mult_frac((long)regval, res, 1000000);
+
+	return 0;
+}
+
+static umode_t max77705_is_visible(const void *data,
+				   enum hwmon_sensor_types type,
+				   u32 attr, int channel)
+{
+	switch (type) {
+	case hwmon_in:
+		switch (attr) {
+		case hwmon_in_input:
+		case hwmon_in_label:
+			return 0444;
+		default:
+			break;
+		}
+		break;
+	case hwmon_curr:
+		switch (attr) {
+		case hwmon_curr_input:
+		case hwmon_in_label:
+			return 0444;
+		case hwmon_curr_average:
+			if (current_channel_desc[channel].avg_reg)
+				return 0444;
+			break;
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
+static int max77705_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
+				int channel, const char **buf)
+{
+	switch (type) {
+	case hwmon_curr:
+		switch (attr) {
+		case hwmon_in_label:
+			*buf = current_channel_desc[channel].label;
+			return 0;
+		default:
+			return -EOPNOTSUPP;
+		}
+
+	case hwmon_in:
+		switch (attr) {
+		case hwmon_in_label:
+			*buf = voltage_channel_desc[channel].label;
+			return 0;
+		default:
+			return -EOPNOTSUPP;
+		}
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int max77705_read(struct device *dev, enum hwmon_sensor_types type,
+			 u32 attr, int channel, long *val)
+{
+	struct regmap *regmap = dev_get_drvdata(dev);
+	u8 reg;
+	u32 res;
+
+	switch (type) {
+	case hwmon_curr:
+		switch (attr) {
+		case hwmon_curr_input:
+			reg = current_channel_desc[channel].reg;
+			res = current_channel_desc[channel].resolution;
+
+			return max77705_read_and_convert(regmap, reg, res, true, val);
+		case hwmon_curr_average:
+			reg = current_channel_desc[channel].avg_reg;
+			res = current_channel_desc[channel].resolution;
+
+			return max77705_read_and_convert(regmap, reg, res, true, val);
+		default:
+			return -EOPNOTSUPP;
+		}
+
+	case hwmon_in:
+		switch (attr) {
+		case hwmon_in_input:
+			reg = voltage_channel_desc[channel].reg;
+			res = voltage_channel_desc[channel].resolution;
+
+			return max77705_read_and_convert(regmap, reg, res, false, val);
+		default:
+			return -EOPNOTSUPP;
+		}
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static const struct hwmon_ops max77705_hwmon_ops = {
+	.is_visible = max77705_is_visible,
+	.read = max77705_read,
+	.read_string = max77705_read_string,
+};
+
+static const struct hwmon_channel_info *max77705_info[] = {
+	HWMON_CHANNEL_INFO(in,
+			   HWMON_I_INPUT | HWMON_I_LABEL,
+			   HWMON_I_INPUT | HWMON_I_LABEL
+			),
+	HWMON_CHANNEL_INFO(curr,
+			   HWMON_C_INPUT | HWMON_C_LABEL,
+			   HWMON_C_INPUT | HWMON_C_AVERAGE | HWMON_C_LABEL
+			),
+	NULL
+};
+
+static const struct hwmon_chip_info max77705_chip_info = {
+	.ops = &max77705_hwmon_ops,
+	.info = max77705_info,
+};
+
+static int max77705_hwmon_probe(struct platform_device *pdev)
+{
+	struct device *hwmon_dev;
+	struct regmap *regmap;
+
+	regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!regmap)
+		return -ENODEV;
+
+	hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, "max77705", regmap,
+							 &max77705_chip_info, NULL);
+	if (IS_ERR(hwmon_dev))
+		return dev_err_probe(&pdev->dev, PTR_ERR(hwmon_dev),
+				"Unable to register hwmon device\n");
+
+	return 0;
+};
+
+static struct platform_driver max77705_hwmon_driver = {
+	.driver = {
+		.name = "max77705-hwmon",
+	},
+	.probe = max77705_hwmon_probe,
+};
+
+module_platform_driver(max77705_hwmon_driver);
+
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
+MODULE_DESCRIPTION("MAX77705 monitor driver");
+MODULE_LICENSE("GPL");