19 files changed, 100 insertions, 782 deletions

diff --git a/drivers/w1/masters/Kconfig b/drivers/w1/masters/Kconfig
index 24b9a8e05f64..ad316573288a 100644
--- a/drivers/w1/masters/Kconfig
+++ b/drivers/w1/masters/Kconfig
@@ -41,13 +41,6 @@ config W1_MASTER_MXC
 	help
 	  Say Y here to enable MXC 1-wire host
 
-config W1_MASTER_DS1WM
-	tristate "Maxim DS1WM 1-wire busmaster"
-	help
-	  Say Y here to enable the DS1WM 1-wire driver, such as that
-	  in HP iPAQ devices like h5xxx, h2200, and ASIC3-based like
-	  hx4700.
-
 config W1_MASTER_GPIO
 	tristate "GPIO 1-wire busmaster"
 	depends on GPIOLIB || COMPILE_TEST
@@ -60,7 +53,7 @@ config W1_MASTER_GPIO
 
 config HDQ_MASTER_OMAP
 	tristate "OMAP HDQ driver"
-	depends on ARCH_OMAP
+	depends on ARCH_OMAP || COMPILE_TEST
 	help
 	  Say Y here if you want support for the 1-wire or HDQ Interface
 	  on an OMAP processor.
diff --git a/drivers/w1/masters/Makefile b/drivers/w1/masters/Makefile
index dae629b7ab49..c5d85a827e52 100644
--- a/drivers/w1/masters/Makefile
+++ b/drivers/w1/masters/Makefile
@@ -8,7 +8,6 @@ obj-$(CONFIG_W1_MASTER_DS2490)		+= ds2490.o
 obj-$(CONFIG_W1_MASTER_DS2482)		+= ds2482.o
 obj-$(CONFIG_W1_MASTER_MXC)		+= mxc_w1.o
 
-obj-$(CONFIG_W1_MASTER_DS1WM)		+= ds1wm.o
 obj-$(CONFIG_W1_MASTER_GPIO)		+= w1-gpio.o
 obj-$(CONFIG_HDQ_MASTER_OMAP)		+= omap_hdq.o
 obj-$(CONFIG_W1_MASTER_SGI)		+= sgi_w1.o
diff --git a/drivers/w1/masters/ds1wm.c b/drivers/w1/masters/ds1wm.c
deleted file mode 100644
index f661695fb589..000000000000
--- a/drivers/w1/masters/ds1wm.c
+++ /dev/null
@@ -1,675 +0,0 @@
-/*
- * 1-wire busmaster driver for DS1WM and ASICs with embedded DS1WMs
- * such as HP iPAQs (including h5xxx, h2200, and devices with ASIC3
- * like hx4700).
- *
- * Copyright (c) 2004-2005, Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>
- * Copyright (c) 2004-2007, Matt Reimer <mreimer@vpop.net>
- *
- * Use consistent with the GNU GPL is permitted,
- * provided that this copyright notice is
- * preserved in its entirety in all copies and derived works.
- */
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/pm.h>
-#include <linux/platform_device.h>
-#include <linux/err.h>
-#include <linux/delay.h>
-#include <linux/mfd/core.h>
-#include <linux/mfd/ds1wm.h>
-#include <linux/slab.h>
-
-#include <asm/io.h>
-
-#include <linux/w1.h>
-
-
-#define DS1WM_CMD	0x00	/* R/W 4 bits command */
-#define DS1WM_DATA	0x01	/* R/W 8 bits, transmit/receive buffer */
-#define DS1WM_INT	0x02	/* R/W interrupt status */
-#define DS1WM_INT_EN	0x03	/* R/W interrupt enable */
-#define DS1WM_CLKDIV	0x04	/* R/W 5 bits of divisor and pre-scale */
-#define DS1WM_CNTRL	0x05	/* R/W master control register (not used yet) */
-
-#define DS1WM_CMD_1W_RESET  (1 << 0)	/* force reset on 1-wire bus */
-#define DS1WM_CMD_SRA	    (1 << 1)	/* enable Search ROM accelerator mode */
-#define DS1WM_CMD_DQ_OUTPUT (1 << 2)	/* write only - forces bus low */
-#define DS1WM_CMD_DQ_INPUT  (1 << 3)	/* read only - reflects state of bus */
-#define DS1WM_CMD_RST	    (1 << 5)	/* software reset */
-#define DS1WM_CMD_OD	    (1 << 7)	/* overdrive */
-
-#define DS1WM_INT_PD	    (1 << 0)	/* presence detect */
-#define DS1WM_INT_PDR	    (1 << 1)	/* presence detect result */
-#define DS1WM_INT_TBE	    (1 << 2)	/* tx buffer empty */
-#define DS1WM_INT_TSRE	    (1 << 3)	/* tx shift register empty */
-#define DS1WM_INT_RBF	    (1 << 4)	/* rx buffer full */
-#define DS1WM_INT_RSRF	    (1 << 5)	/* rx shift register full */
-
-#define DS1WM_INTEN_EPD	    (1 << 0)	/* enable presence detect int */
-#define DS1WM_INTEN_IAS	    (1 << 1)	/* INTR active state */
-#define DS1WM_INTEN_ETBE    (1 << 2)	/* enable tx buffer empty int */
-#define DS1WM_INTEN_ETMT    (1 << 3)	/* enable tx shift register empty int */
-#define DS1WM_INTEN_ERBF    (1 << 4)	/* enable rx buffer full int */
-#define DS1WM_INTEN_ERSRF   (1 << 5)	/* enable rx shift register full int */
-#define DS1WM_INTEN_DQO	    (1 << 6)	/* enable direct bus driving ops */
-
-#define DS1WM_INTEN_NOT_IAS (~DS1WM_INTEN_IAS)	/* all but INTR active state */
-
-#define DS1WM_TIMEOUT (HZ * 5)
-
-static struct {
-	unsigned long freq;
-	unsigned long divisor;
-} freq[] = {
-	{   1000000, 0x80 },
-	{   2000000, 0x84 },
-	{   3000000, 0x81 },
-	{   4000000, 0x88 },
-	{   5000000, 0x82 },
-	{   6000000, 0x85 },
-	{   7000000, 0x83 },
-	{   8000000, 0x8c },
-	{  10000000, 0x86 },
-	{  12000000, 0x89 },
-	{  14000000, 0x87 },
-	{  16000000, 0x90 },
-	{  20000000, 0x8a },
-	{  24000000, 0x8d },
-	{  28000000, 0x8b },
-	{  32000000, 0x94 },
-	{  40000000, 0x8e },
-	{  48000000, 0x91 },
-	{  56000000, 0x8f },
-	{  64000000, 0x98 },
-	{  80000000, 0x92 },
-	{  96000000, 0x95 },
-	{ 112000000, 0x93 },
-	{ 128000000, 0x9c },
-/* you can continue this table, consult the OPERATION - CLOCK DIVISOR
-   section of the ds1wm spec sheet. */
-};
-
-struct ds1wm_data {
-	void     __iomem *map;
-	unsigned int      bus_shift; /* # of shifts to calc register offsets */
-	bool      is_hw_big_endian;
-	struct platform_device *pdev;
-	const struct mfd_cell   *cell;
-	int      irq;
-	int      slave_present;
-	void     *reset_complete;
-	void     *read_complete;
-	void     *write_complete;
-	int      read_error;
-	/* last byte received */
-	u8       read_byte;
-	/* byte to write that makes all intr disabled, */
-	/* considering active_state (IAS) (optimization) */
-	u8       int_en_reg_none;
-	unsigned int reset_recover_delay; /* see ds1wm.h */
-};
-
-static inline void ds1wm_write_register(struct ds1wm_data *ds1wm_data, u32 reg,
-					u8 val)
-{
-	if (ds1wm_data->is_hw_big_endian) {
-		switch (ds1wm_data->bus_shift) {
-		case 0:
-			iowrite8(val, ds1wm_data->map + (reg << 0));
-			break;
-		case 1:
-			iowrite16be((u16)val, ds1wm_data->map + (reg << 1));
-			break;
-		case 2:
-			iowrite32be((u32)val, ds1wm_data->map + (reg << 2));
-			break;
-		}
-	} else {
-		switch (ds1wm_data->bus_shift) {
-		case 0:
-			iowrite8(val, ds1wm_data->map + (reg << 0));
-			break;
-		case 1:
-			iowrite16((u16)val, ds1wm_data->map + (reg << 1));
-			break;
-		case 2:
-			iowrite32((u32)val, ds1wm_data->map + (reg << 2));
-			break;
-		}
-	}
-}
-
-static inline u8 ds1wm_read_register(struct ds1wm_data *ds1wm_data, u32 reg)
-{
-	u32 val = 0;
-
-	if (ds1wm_data->is_hw_big_endian) {
-		switch (ds1wm_data->bus_shift) {
-		case 0:
-			val = ioread8(ds1wm_data->map + (reg << 0));
-			break;
-		case 1:
-			val = ioread16be(ds1wm_data->map + (reg << 1));
-			break;
-		case 2:
-			val = ioread32be(ds1wm_data->map + (reg << 2));
-			break;
-		}
-	} else {
-		switch (ds1wm_data->bus_shift) {
-		case 0:
-			val = ioread8(ds1wm_data->map + (reg << 0));
-			break;
-		case 1:
-			val = ioread16(ds1wm_data->map + (reg << 1));
-			break;
-		case 2:
-			val = ioread32(ds1wm_data->map + (reg << 2));
-			break;
-		}
-	}
-	dev_dbg(&ds1wm_data->pdev->dev,
-		"ds1wm_read_register reg: %d, 32 bit val:%x\n", reg, val);
-	return (u8)val;
-}
-
-
-static irqreturn_t ds1wm_isr(int isr, void *data)
-{
-	struct ds1wm_data *ds1wm_data = data;
-	u8 intr;
-	u8 inten = ds1wm_read_register(ds1wm_data, DS1WM_INT_EN);
-	/* if no bits are set in int enable register (except the IAS)
-	than go no further, reading the regs below has side effects */
-	if (!(inten & DS1WM_INTEN_NOT_IAS))
-		return IRQ_NONE;
-
-	ds1wm_write_register(ds1wm_data,
-		DS1WM_INT_EN, ds1wm_data->int_en_reg_none);
-
-	/* this read action clears the INTR and certain flags in ds1wm */
-	intr = ds1wm_read_register(ds1wm_data, DS1WM_INT);
-
-	ds1wm_data->slave_present = (intr & DS1WM_INT_PDR) ? 0 : 1;
-
-	if ((intr & DS1WM_INT_TSRE) && ds1wm_data->write_complete) {
-		inten &= ~DS1WM_INTEN_ETMT;
-		complete(ds1wm_data->write_complete);
-	}
-	if (intr & DS1WM_INT_RBF) {
-		/* this read clears the RBF flag */
-		ds1wm_data->read_byte = ds1wm_read_register(ds1wm_data,
-		DS1WM_DATA);
-		inten &= ~DS1WM_INTEN_ERBF;
-		if (ds1wm_data->read_complete)
-			complete(ds1wm_data->read_complete);
-	}
-	if ((intr & DS1WM_INT_PD) && ds1wm_data->reset_complete) {
-		inten &= ~DS1WM_INTEN_EPD;
-		complete(ds1wm_data->reset_complete);
-	}
-
-	ds1wm_write_register(ds1wm_data, DS1WM_INT_EN, inten);
-	return IRQ_HANDLED;
-}
-
-static int ds1wm_reset(struct ds1wm_data *ds1wm_data)
-{
-	unsigned long timeleft;
-	DECLARE_COMPLETION_ONSTACK(reset_done);
-
-	ds1wm_data->reset_complete = &reset_done;
-
-	/* enable Presence detect only */
-	ds1wm_write_register(ds1wm_data, DS1WM_INT_EN, DS1WM_INTEN_EPD |
-	ds1wm_data->int_en_reg_none);
-
-	ds1wm_write_register(ds1wm_data, DS1WM_CMD, DS1WM_CMD_1W_RESET);
-
-	timeleft = wait_for_completion_timeout(&reset_done, DS1WM_TIMEOUT);
-	ds1wm_data->reset_complete = NULL;
-	if (!timeleft) {
-		dev_err(&ds1wm_data->pdev->dev, "reset failed, timed out\n");
-		return 1;
-	}
-
-	if (!ds1wm_data->slave_present) {
-		dev_dbg(&ds1wm_data->pdev->dev, "reset: no devices found\n");
-		return 1;
-	}
-
-	if (ds1wm_data->reset_recover_delay)
-		msleep(ds1wm_data->reset_recover_delay);
-
-	return 0;
-}
-
-static int ds1wm_write(struct ds1wm_data *ds1wm_data, u8 data)
-{
-	unsigned long timeleft;
-	DECLARE_COMPLETION_ONSTACK(write_done);
-	ds1wm_data->write_complete = &write_done;
-
-	ds1wm_write_register(ds1wm_data, DS1WM_INT_EN,
-	ds1wm_data->int_en_reg_none | DS1WM_INTEN_ETMT);
-
-	ds1wm_write_register(ds1wm_data, DS1WM_DATA, data);
-
-	timeleft = wait_for_completion_timeout(&write_done, DS1WM_TIMEOUT);
-
-	ds1wm_data->write_complete = NULL;
-	if (!timeleft) {
-		dev_err(&ds1wm_data->pdev->dev, "write failed, timed out\n");
-		return -ETIMEDOUT;
-	}
-
-	return 0;
-}
-
-static u8 ds1wm_read(struct ds1wm_data *ds1wm_data, unsigned char write_data)
-{
-	unsigned long timeleft;
-	u8 intEnable = DS1WM_INTEN_ERBF | ds1wm_data->int_en_reg_none;
-	DECLARE_COMPLETION_ONSTACK(read_done);
-
-	ds1wm_read_register(ds1wm_data, DS1WM_DATA);
-
-	ds1wm_data->read_complete = &read_done;
-	ds1wm_write_register(ds1wm_data, DS1WM_INT_EN, intEnable);
-
-	ds1wm_write_register(ds1wm_data, DS1WM_DATA, write_data);
-	timeleft = wait_for_completion_timeout(&read_done, DS1WM_TIMEOUT);
-
-	ds1wm_data->read_complete = NULL;
-	if (!timeleft) {
-		dev_err(&ds1wm_data->pdev->dev, "read failed, timed out\n");
-		ds1wm_data->read_error = -ETIMEDOUT;
-		return 0xFF;
-	}
-	ds1wm_data->read_error = 0;
-	return ds1wm_data->read_byte;
-}
-
-static int ds1wm_find_divisor(int gclk)
-{
-	int i;
-
-	for (i = ARRAY_SIZE(freq)-1; i >= 0; --i)
-		if (gclk >= freq[i].freq)
-			return freq[i].divisor;
-
-	return 0;
-}
-
-static void ds1wm_up(struct ds1wm_data *ds1wm_data)
-{
-	int divisor;
-	struct device *dev = &ds1wm_data->pdev->dev;
-	struct ds1wm_driver_data *plat = dev_get_platdata(dev);
-
-	if (ds1wm_data->cell->enable)
-		ds1wm_data->cell->enable(ds1wm_data->pdev);
-
-	divisor = ds1wm_find_divisor(plat->clock_rate);
-	dev_dbg(dev, "found divisor 0x%x for clock %d\n",
-		divisor, plat->clock_rate);
-	if (divisor == 0) {
-		dev_err(dev, "no suitable divisor for %dHz clock\n",
-			plat->clock_rate);
-		return;
-	}
-	ds1wm_write_register(ds1wm_data, DS1WM_CLKDIV, divisor);
-
-	/* Let the w1 clock stabilize. */
-	msleep(1);
-
-	ds1wm_reset(ds1wm_data);
-}
-
-static void ds1wm_down(struct ds1wm_data *ds1wm_data)
-{
-	ds1wm_reset(ds1wm_data);
-
-	/* Disable interrupts. */
-	ds1wm_write_register(ds1wm_data, DS1WM_INT_EN,
-		ds1wm_data->int_en_reg_none);
-
-	if (ds1wm_data->cell->disable)
-		ds1wm_data->cell->disable(ds1wm_data->pdev);
-}
-
-/* --------------------------------------------------------------------- */
-/* w1 methods */
-
-static u8 ds1wm_read_byte(void *data)
-{
-	struct ds1wm_data *ds1wm_data = data;
-
-	return ds1wm_read(ds1wm_data, 0xff);
-}
-
-static void ds1wm_write_byte(void *data, u8 byte)
-{
-	struct ds1wm_data *ds1wm_data = data;
-
-	ds1wm_write(ds1wm_data, byte);
-}
-
-static u8 ds1wm_reset_bus(void *data)
-{
-	struct ds1wm_data *ds1wm_data = data;
-
-	ds1wm_reset(ds1wm_data);
-
-	return 0;
-}
-
-static void ds1wm_search(void *data, struct w1_master *master_dev,
-			u8 search_type, w1_slave_found_callback slave_found)
-{
-	struct ds1wm_data *ds1wm_data = data;
-	int i;
-	int ms_discrep_bit = -1;
-	u64 r = 0; /* holds the progress of the search */
-	u64 r_prime, d;
-	unsigned slaves_found = 0;
-	unsigned int pass = 0;
-
-	dev_dbg(&ds1wm_data->pdev->dev, "search begin\n");
-	while (true) {
-		++pass;
-		if (pass > 100) {
-			dev_dbg(&ds1wm_data->pdev->dev,
-				"too many attempts (100), search aborted\n");
-			return;
-		}
-
-		mutex_lock(&master_dev->bus_mutex);
-		if (ds1wm_reset(ds1wm_data)) {
-			mutex_unlock(&master_dev->bus_mutex);
-			dev_dbg(&ds1wm_data->pdev->dev,
-				"pass: %d reset error (or no slaves)\n", pass);
-			break;
-		}
-
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d r : %0#18llx writing SEARCH_ROM\n", pass, r);
-		ds1wm_write(ds1wm_data, search_type);
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d entering ASM\n", pass);
-		ds1wm_write_register(ds1wm_data, DS1WM_CMD, DS1WM_CMD_SRA);
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d beginning nibble loop\n", pass);
-
-		r_prime = 0;
-		d = 0;
-		/* we work one nibble at a time */
-		/* each nibble is interleaved to form a byte */
-		for (i = 0; i < 16; i++) {
-
-			unsigned char resp, _r, _r_prime, _d;
-
-			_r = (r >> (4*i)) & 0xf;
-			_r = ((_r & 0x1) << 1) |
-			((_r & 0x2) << 2) |
-			((_r & 0x4) << 3) |
-			((_r & 0x8) << 4);
-
-			/* writes _r, then reads back: */
-			resp = ds1wm_read(ds1wm_data, _r);
-
-			if (ds1wm_data->read_error) {
-				dev_err(&ds1wm_data->pdev->dev,
-				"pass: %d nibble: %d read error\n", pass, i);
-				break;
-			}
-
-			_r_prime = ((resp & 0x02) >> 1) |
-			((resp & 0x08) >> 2) |
-			((resp & 0x20) >> 3) |
-			((resp & 0x80) >> 4);
-
-			_d = ((resp & 0x01) >> 0) |
-			((resp & 0x04) >> 1) |
-			((resp & 0x10) >> 2) |
-			((resp & 0x40) >> 3);
-
-			r_prime |= (unsigned long long) _r_prime << (i * 4);
-			d |= (unsigned long long) _d << (i * 4);
-
-		}
-		if (ds1wm_data->read_error) {
-			mutex_unlock(&master_dev->bus_mutex);
-			dev_err(&ds1wm_data->pdev->dev,
-				"pass: %d read error, retrying\n", pass);
-			break;
-		}
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d r\': %0#18llx d:%0#18llx\n",
-			pass, r_prime, d);
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d nibble loop complete, exiting ASM\n", pass);
-		ds1wm_write_register(ds1wm_data, DS1WM_CMD, ~DS1WM_CMD_SRA);
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d resetting bus\n", pass);
-		ds1wm_reset(ds1wm_data);
-		mutex_unlock(&master_dev->bus_mutex);
-		if ((r_prime & ((u64)1 << 63)) && (d & ((u64)1 << 63))) {
-			dev_err(&ds1wm_data->pdev->dev,
-				"pass: %d bus error, retrying\n", pass);
-			continue; /* start over */
-		}
-
-
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d found %0#18llx\n", pass, r_prime);
-		slave_found(master_dev, r_prime);
-		++slaves_found;
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d complete, preparing next pass\n", pass);
-
-		/* any discrepency found which we already choose the
-		   '1' branch is now is now irrelevant we reveal the
-		   next branch with this: */
-		d &= ~r;
-		/* find last bit set, i.e. the most signif. bit set */
-		ms_discrep_bit = fls64(d) - 1;
-		dev_dbg(&ds1wm_data->pdev->dev,
-			"pass: %d new d:%0#18llx MS discrep bit:%d\n",
-			pass, d, ms_discrep_bit);
-
-		/* prev_ms_discrep_bit = ms_discrep_bit;
-		   prepare for next ROM search:		    */
-		if (ms_discrep_bit == -1)
-			break;
-
-		r = (r &  ~(~0ull << (ms_discrep_bit))) | 1 << ms_discrep_bit;
-	} /* end while true */
-	dev_dbg(&ds1wm_data->pdev->dev,
-		"pass: %d total: %d search done ms d bit pos: %d\n", pass,
-		slaves_found, ms_discrep_bit);
-}
-
-/* --------------------------------------------------------------------- */
-
-static struct w1_bus_master ds1wm_master = {
-	.read_byte  = ds1wm_read_byte,
-	.write_byte = ds1wm_write_byte,
-	.reset_bus  = ds1wm_reset_bus,
-	.search	    = ds1wm_search,
-};
-
-static int ds1wm_probe(struct platform_device *pdev)
-{
-	struct ds1wm_data *ds1wm_data;
-	struct ds1wm_driver_data *plat;
-	struct resource *res;
-	int ret;
-	u8 inten;
-
-	if (!pdev)
-		return -ENODEV;
-
-	ds1wm_data = devm_kzalloc(&pdev->dev, sizeof(*ds1wm_data), GFP_KERNEL);
-	if (!ds1wm_data)
-		return -ENOMEM;
-
-	platform_set_drvdata(pdev, ds1wm_data);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENXIO;
-	ds1wm_data->map = devm_ioremap(&pdev->dev, res->start,
-				       resource_size(res));
-	if (!ds1wm_data->map)
-		return -ENOMEM;
-
-	ds1wm_data->pdev = pdev;
-	ds1wm_data->cell = mfd_get_cell(pdev);
-	if (!ds1wm_data->cell)
-		return -ENODEV;
-	plat = dev_get_platdata(&pdev->dev);
-	if (!plat)
-		return -ENODEV;
-
-	/* how many bits to shift register number to get register offset */
-	if (plat->bus_shift > 2) {
-		dev_err(&ds1wm_data->pdev->dev,
-			"illegal bus shift %d, not written",
-			ds1wm_data->bus_shift);
-		return -EINVAL;
-	}
-
-	ds1wm_data->bus_shift = plat->bus_shift;
-	/* make sure resource has space for 8 registers */
-	if ((8 << ds1wm_data->bus_shift) > resource_size(res)) {
-		dev_err(&ds1wm_data->pdev->dev,
-			"memory resource size %d to small, should be %d\n",
-			(int)resource_size(res),
-			8 << ds1wm_data->bus_shift);
-		return -EINVAL;
-	}
-
-	ds1wm_data->is_hw_big_endian = plat->is_hw_big_endian;
-
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (!res)
-		return -ENXIO;
-	ds1wm_data->irq = res->start;
-	ds1wm_data->int_en_reg_none = (plat->active_high ? DS1WM_INTEN_IAS : 0);
-	ds1wm_data->reset_recover_delay = plat->reset_recover_delay;
-
-	/* Mask interrupts, set IAS before claiming interrupt */
-	inten = ds1wm_read_register(ds1wm_data, DS1WM_INT_EN);
-	ds1wm_write_register(ds1wm_data,
-		DS1WM_INT_EN, ds1wm_data->int_en_reg_none);
-
-	if (res->flags & IORESOURCE_IRQ_HIGHEDGE)
-		irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_EDGE_RISING);
-	if (res->flags & IORESOURCE_IRQ_LOWEDGE)
-		irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_EDGE_FALLING);
-	if (res->flags & IORESOURCE_IRQ_HIGHLEVEL)
-		irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_LEVEL_HIGH);
-	if (res->flags & IORESOURCE_IRQ_LOWLEVEL)
-		irq_set_irq_type(ds1wm_data->irq, IRQ_TYPE_LEVEL_LOW);
-
-	ret = devm_request_irq(&pdev->dev, ds1wm_data->irq, ds1wm_isr,
-			IRQF_SHARED, "ds1wm", ds1wm_data);
-	if (ret) {
-		dev_err(&ds1wm_data->pdev->dev,
-			"devm_request_irq %d failed with errno %d\n",
-			ds1wm_data->irq,
-			ret);
-
-		return ret;
-	}
-
-	ds1wm_up(ds1wm_data);
-
-	ds1wm_master.data = (void *)ds1wm_data;
-
-	ret = w1_add_master_device(&ds1wm_master);
-	if (ret)
-		goto err;
-
-	dev_dbg(&ds1wm_data->pdev->dev,
-		"ds1wm: probe successful, IAS: %d, rec.delay: %d, clockrate: %d, bus-shift: %d, is Hw Big Endian: %d\n",
-		plat->active_high,
-		plat->reset_recover_delay,
-		plat->clock_rate,
-		ds1wm_data->bus_shift,
-		ds1wm_data->is_hw_big_endian);
-	return 0;
-
-err:
-	ds1wm_down(ds1wm_data);
-
-	return ret;
-}
-
-#ifdef CONFIG_PM
-static int ds1wm_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	struct ds1wm_data *ds1wm_data = platform_get_drvdata(pdev);
-
-	ds1wm_down(ds1wm_data);
-
-	return 0;
-}
-
-static int ds1wm_resume(struct platform_device *pdev)
-{
-	struct ds1wm_data *ds1wm_data = platform_get_drvdata(pdev);
-
-	ds1wm_up(ds1wm_data);
-
-	return 0;
-}
-#else
-#define ds1wm_suspend NULL
-#define ds1wm_resume NULL
-#endif
-
-static int ds1wm_remove(struct platform_device *pdev)
-{
-	struct ds1wm_data *ds1wm_data = platform_get_drvdata(pdev);
-
-	w1_remove_master_device(&ds1wm_master);
-	ds1wm_down(ds1wm_data);
-
-	return 0;
-}
-
-static struct platform_driver ds1wm_driver = {
-	.driver   = {
-		.name = "ds1wm",
-	},
-	.probe    = ds1wm_probe,
-	.remove   = ds1wm_remove,
-	.suspend  = ds1wm_suspend,
-	.resume   = ds1wm_resume
-};
-
-static int __init ds1wm_init(void)
-{
-	pr_info("DS1WM w1 busmaster driver - (c) 2004 Szabolcs Gyurko\n");
-	return platform_driver_register(&ds1wm_driver);
-}
-
-static void __exit ds1wm_exit(void)
-{
-	platform_driver_unregister(&ds1wm_driver);
-}
-
-module_init(ds1wm_init);
-module_exit(ds1wm_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Szabolcs Gyurko <szabolcs.gyurko@tlt.hu>, "
-	"Matt Reimer <mreimer@vpop.net>,"
-	"Jean-Francois Dagenais <dagenaisj@sonatest.com>");
-MODULE_DESCRIPTION("DS1WM w1 busmaster driver");
diff --git a/drivers/w1/masters/ds2482.c b/drivers/w1/masters/ds2482.c
index 62c44616d8a9..c1de8a92e144 100644
--- a/drivers/w1/masters/ds2482.c
+++ b/drivers/w1/masters/ds2482.c
@@ -15,7 +15,6 @@
 #include <linux/slab.h>
 #include <linux/i2c.h>
 #include <linux/delay.h>
-#include <asm/delay.h>
 
 #include <linux/w1.h>
 
@@ -36,7 +35,7 @@ MODULE_PARM_DESC(active_pullup, "Active pullup (apply to all buses): " \
 
 /* extra configurations - e.g. 1WS */
 static int extra_config;
-module_param(extra_config, int, S_IRUGO | S_IWUSR);
+module_param(extra_config, int, 0644);
 MODULE_PARM_DESC(extra_config, "Extra Configuration settings 1=APU,2=PPM,3=SPU,8=1WS");
 
 /*
@@ -78,10 +77,8 @@ MODULE_PARM_DESC(extra_config, "Extra Configuration settings 1=APU,2=PPM,3=SPU,8
  * To set the channel, write the value at the index of the channel.
  * Read and compare against the corresponding value to verify the change.
  */
-static const u8 ds2482_chan_wr[8] =
-	{ 0xF0, 0xE1, 0xD2, 0xC3, 0xB4, 0xA5, 0x96, 0x87 };
-static const u8 ds2482_chan_rd[8] =
-	{ 0xB8, 0xB1, 0xAA, 0xA3, 0x9C, 0x95, 0x8E, 0x87 };
+static const u8 ds2482_chan_wr[8] = { 0xF0, 0xE1, 0xD2, 0xC3, 0xB4, 0xA5, 0x96, 0x87 };
+static const u8 ds2482_chan_rd[8] = { 0xB8, 0xB1, 0xAA, 0xA3, 0x9C, 0x95, 0x8E, 0x87 };
 
 
 /*
@@ -442,8 +439,7 @@ static u8 ds2482_w1_set_pullup(void *data, int delay)
 }
 
 
-static int ds2482_probe(struct i2c_client *client,
-			const struct i2c_device_id *id)
+static int ds2482_probe(struct i2c_client *client)
 {
 	struct ds2482_data *data;
 	int err = -ENODEV;
@@ -455,7 +451,8 @@ static int ds2482_probe(struct i2c_client *client,
 				     I2C_FUNC_SMBUS_BYTE))
 		return -ENODEV;
 
-	if (!(data = kzalloc(sizeof(struct ds2482_data), GFP_KERNEL))) {
+	data = kzalloc(sizeof(struct ds2482_data), GFP_KERNEL);
+	if (!data) {
 		err = -ENOMEM;
 		goto exit;
 	}
@@ -545,6 +542,7 @@ static void ds2482_remove(struct i2c_client *client)
  */
 static const struct i2c_device_id ds2482_id[] = {
 	{ "ds2482", 0 },
+	{ "ds2484", 0 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, ds2482_id);
@@ -553,7 +551,7 @@ static struct i2c_driver ds2482_driver = {
 	.driver = {
 		.name	= "ds2482",
 	},
-	.probe		= ds2482_probe,
+	.probe_new	= ds2482_probe,
 	.remove		= ds2482_remove,
 	.id_table	= ds2482_id,
 };
diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c
index 0eb560fc0153..5f5b97e24700 100644
--- a/drivers/w1/masters/ds2490.c
+++ b/drivers/w1/masters/ds2490.c
@@ -304,6 +304,7 @@ static void ds_reset_device(struct ds_device *dev)
 	if (dev->spu_sleep) {
 		/* lower 4 bits are 0, see ds_set_pullup */
 		u8 del = dev->spu_sleep>>4;
+
 		if (ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del))
 			dev_err(&dev->udev->dev,
 				"%s: Error setting duration\n", __func__);
@@ -731,7 +732,8 @@ static void ds9490r_search(void *data, struct w1_master *master,
 			break;
 
 		if (st.data_in_buffer_status) {
-			/* Bulk in can receive partial ids, but when it does
+			/*
+			 * Bulk in can receive partial ids, but when it does
 			 * they fail crc and will be discarded anyway.
 			 * That has only been seen when status in buffer
 			 * is 0 and bulk is read anyway, so don't read
@@ -743,8 +745,10 @@ static void ds9490r_search(void *data, struct w1_master *master,
 				break;
 			for (i = 0; i < err/8; ++i) {
 				found_ids[found++] = buf[i];
-				/* can't know if there will be a discrepancy
-				 * value after until the next id */
+				/*
+				 * can't know if there will be a discrepancy
+				 * value after until the next id
+				 */
 				if (found == search_limit) {
 					master->search_id = buf[i];
 					break;
@@ -760,7 +764,8 @@ static void ds9490r_search(void *data, struct w1_master *master,
 	if (found <= search_limit) {
 		master->search_id = 0;
 	} else if (!test_bit(W1_WARN_MAX_COUNT, &master->flags)) {
-		/* Only max_slave_count will be scanned in a search,
+		/*
+		 * Only max_slave_count will be scanned in a search,
 		 * but it will start where it left off next search
 		 * until all ids are identified and then it will start
 		 * over.  A continued search will report the previous
diff --git a/drivers/w1/masters/matrox_w1.c b/drivers/w1/masters/matrox_w1.c
index ee716c715710..2852cd2dc67c 100644
--- a/drivers/w1/masters/matrox_w1.c
+++ b/drivers/w1/masters/matrox_w1.c
@@ -7,7 +7,7 @@
 
 #include <asm/types.h>
 #include <linux/atomic.h>
-#include <asm/io.h>
+#include <linux/io.h>
 
 #include <linux/delay.h>
 #include <linux/kernel.h>
@@ -39,8 +39,7 @@
 #define MATROX_GET_DATA			0x2B
 #define MATROX_CURSOR_CTL		0x06
 
-struct matrox_device
-{
+struct matrox_device {
 	void __iomem *base_addr;
 	void __iomem *port_index;
 	void __iomem *port_data;
@@ -64,7 +63,7 @@ struct matrox_device
  *
  * Port mapping.
  */
-static __inline__ u8 matrox_w1_read_reg(struct matrox_device *dev, u8 reg)
+static inline u8 matrox_w1_read_reg(struct matrox_device *dev, u8 reg)
 {
 	u8 ret;
 
@@ -75,7 +74,7 @@ static __inline__ u8 matrox_w1_read_reg(struct matrox_device *dev, u8 reg)
 	return ret;
 }
 
-static __inline__ void matrox_w1_write_reg(struct matrox_device *dev, u8 reg, u8 val)
+static inline void matrox_w1_write_reg(struct matrox_device *dev, u8 reg, u8 val)
 {
 	writeb(reg, dev->port_index);
 	writeb(val, dev->port_data);
@@ -123,13 +122,8 @@ static int matrox_w1_probe(struct pci_dev *pdev, const struct pci_device_id *ent
 
 	dev = kzalloc(sizeof(struct matrox_device) +
 		       sizeof(struct w1_bus_master), GFP_KERNEL);
-	if (!dev) {
-		dev_err(&pdev->dev,
-			"%s: Failed to create new matrox_device object.\n",
-			__func__);
+	if (!dev)
 		return -ENOMEM;
-	}
-
 
 	dev->bus_master = (struct w1_bus_master *)(dev + 1);
 
diff --git a/drivers/w1/masters/omap_hdq.c b/drivers/w1/masters/omap_hdq.c
index bf2ec59c1f9d..6a39b71eb718 100644
--- a/drivers/w1/masters/omap_hdq.c
+++ b/drivers/w1/masters/omap_hdq.c
@@ -1,12 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
- * drivers/w1/masters/omap_hdq.c
- *
  * Copyright (C) 2007,2012 Texas Instruments, Inc.
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- *
  */
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -48,7 +42,7 @@
 static DECLARE_WAIT_QUEUE_HEAD(hdq_wait_queue);
 
 static int w1_id;
-module_param(w1_id, int, S_IRUSR);
+module_param(w1_id, int, 0400);
 MODULE_PARM_DESC(w1_id, "1-wire id for the slave detection in HDQ mode");
 
 struct hdq_data {
@@ -579,10 +573,8 @@ static int omap_hdq_probe(struct platform_device *pdev)
 	const char *mode;
 
 	hdq_data = devm_kzalloc(dev, sizeof(*hdq_data), GFP_KERNEL);
-	if (!hdq_data) {
-		dev_dbg(&pdev->dev, "unable to allocate memory\n");
+	if (!hdq_data)
 		return -ENOMEM;
-	}
 
 	hdq_data->dev = dev;
 	platform_set_drvdata(pdev, hdq_data);
diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c
index d4632aace402..e45acb6d916e 100644
--- a/drivers/w1/masters/w1-gpio.c
+++ b/drivers/w1/masters/w1-gpio.c
@@ -87,7 +87,7 @@ static int w1_gpio_probe(struct platform_device *pdev)
 		 * driver it high/low like we are in full control of the line and
 		 * open drain will happen transparently.
 		 */
-		if (of_get_property(np, "linux,open-drain", NULL))
+		if (of_property_present(np, "linux,open-drain"))
 			gflags = GPIOD_OUT_LOW;
 
 		pdev->dev.platform_data = pdata;
@@ -101,10 +101,8 @@ static int w1_gpio_probe(struct platform_device *pdev)
 
 	master = devm_kzalloc(dev, sizeof(struct w1_bus_master),
 			GFP_KERNEL);
-	if (!master) {
-		dev_err(dev, "Out of memory\n");
+	if (!master)
 		return -ENOMEM;
-	}
 
 	pdata->gpiod = devm_gpiod_get_index(dev, NULL, 0, gflags);
 	if (IS_ERR(pdata->gpiod)) {
diff --git a/drivers/w1/slaves/w1_ds2406.c b/drivers/w1/slaves/w1_ds2406.c
index 6c269af73c80..2f5926859b8b 100644
--- a/drivers/w1/slaves/w1_ds2406.c
+++ b/drivers/w1/slaves/w1_ds2406.c
@@ -27,11 +27,11 @@ static ssize_t w1_f12_read_state(
 	struct bin_attribute *bin_attr,
 	char *buf, loff_t off, size_t count)
 {
-	u8 w1_buf[6]={W1_F12_FUNC_READ_STATUS, 7, 0, 0, 0, 0};
+	u8 w1_buf[6] = {W1_F12_FUNC_READ_STATUS, 7, 0, 0, 0, 0};
 	struct w1_slave *sl = kobj_to_w1_slave(kobj);
-	u16 crc=0;
+	u16 crc = 0;
 	int i;
-	ssize_t rtnval=1;
+	ssize_t rtnval = 1;
 
 	if (off != 0)
 		return 0;
@@ -47,12 +47,12 @@ static ssize_t w1_f12_read_state(
 
 	w1_write_block(sl->master, w1_buf, 3);
 	w1_read_block(sl->master, w1_buf+3, 3);
-	for (i=0; i<6; i++)
-		crc=crc16_byte(crc, w1_buf[i]);
-	if (crc==0xb001) /* good read? */
-		*buf=((w1_buf[3]>>5)&3)|0x30;
+	for (i = 0; i < 6; i++)
+		crc = crc16_byte(crc, w1_buf[i]);
+	if (crc == 0xb001) /* good read? */
+		*buf = ((w1_buf[3]>>5)&3)|0x30;
 	else
-		rtnval=-EIO;
+		rtnval = -EIO;
 
 	mutex_unlock(&sl->master->bus_mutex);
 
@@ -65,10 +65,10 @@ static ssize_t w1_f12_write_output(
 	char *buf, loff_t off, size_t count)
 {
 	struct w1_slave *sl = kobj_to_w1_slave(kobj);
-	u8 w1_buf[6]={W1_F12_FUNC_WRITE_STATUS, 7, 0, 0, 0, 0};
-	u16 crc=0;
+	u8 w1_buf[6] = {W1_F12_FUNC_WRITE_STATUS, 7, 0, 0, 0, 0};
+	u16 crc = 0;
 	int i;
-	ssize_t rtnval=1;
+	ssize_t rtnval = 1;
 
 	if (count != 1 || off != 0)
 		return -EFAULT;
@@ -83,12 +83,12 @@ static ssize_t w1_f12_write_output(
 	w1_buf[3] = (((*buf)&3)<<5)|0x1F;
 	w1_write_block(sl->master, w1_buf, 4);
 	w1_read_block(sl->master, w1_buf+4, 2);
-	for (i=0; i<6; i++)
-		crc=crc16_byte(crc, w1_buf[i]);
-	if (crc==0xb001) /* good read? */
+	for (i = 0; i < 6; i++)
+		crc = crc16_byte(crc, w1_buf[i]);
+	if (crc == 0xb001) /* good read? */
 		w1_write_8(sl->master, 0xFF);
 	else
-		rtnval=-EIO;
+		rtnval = -EIO;
 
 	mutex_unlock(&sl->master->bus_mutex);
 	return rtnval;
@@ -99,7 +99,7 @@ static struct bin_attribute w1_f12_sysfs_bin_files[NB_SYSFS_BIN_FILES] = {
 	{
 		.attr = {
 			.name = "state",
-			.mode = S_IRUGO,
+			.mode = 0444,
 		},
 		.size = 1,
 		.read = w1_f12_read_state,
@@ -107,7 +107,7 @@ static struct bin_attribute w1_f12_sysfs_bin_files[NB_SYSFS_BIN_FILES] = {
 	{
 		.attr = {
 			.name = "output",
-			.mode = S_IRUGO | S_IWUSR | S_IWGRP,
+			.mode = 0664,
 		},
 		.size = 1,
 		.write = w1_f12_write_output,
@@ -133,6 +133,7 @@ static int w1_f12_add_slave(struct w1_slave *sl)
 static void w1_f12_remove_slave(struct w1_slave *sl)
 {
 	int i;
+
 	for (i = NB_SYSFS_BIN_FILES - 1; i >= 0; --i)
 		sysfs_remove_bin_file(&sl->dev.kobj,
 			&(w1_f12_sysfs_bin_files[i]));
diff --git a/drivers/w1/slaves/w1_ds2408.c b/drivers/w1/slaves/w1_ds2408.c
index ad102c577122..56f822a1dfdb 100644
--- a/drivers/w1/slaves/w1_ds2408.c
+++ b/drivers/w1/slaves/w1_ds2408.c
@@ -35,12 +35,12 @@
 
 #define W1_F29_SUCCESS_CONFIRM_BYTE        0xAA
 
-static int _read_reg(struct w1_slave *sl, u8 address, unsigned char* buf)
+static int _read_reg(struct w1_slave *sl, u8 address, unsigned char *buf)
 {
 	u8 wrbuf[3];
-	dev_dbg(&sl->dev,
-			"Reading with slave: %p, reg addr: %0#4x, buff addr: %p",
-			sl, (unsigned int)address, buf);
+
+	dev_dbg(&sl->dev, "Reading with slave: %p, reg addr: %0#4x, buff addr: %p",
+		sl, (unsigned int)address, buf);
 
 	if (!buf)
 		return -EINVAL;
@@ -206,7 +206,7 @@ out:
 }
 
 
-/**
+/*
  * Writing to the activity file resets the activity latches.
  */
 static ssize_t activity_write(struct file *filp, struct kobject *kobj,
@@ -292,7 +292,7 @@ static int w1_f29_disable_test_mode(struct w1_slave *sl)
 {
 	int res;
 	u8 magic[10] = {0x96, };
-	u64 rn = le64_to_cpu(*((u64*)&sl->reg_num));
+	u64 rn = le64_to_cpu(*((u64 *)&sl->reg_num));
 
 	memcpy(&magic[1], &rn, 8);
 	magic[9] = 0x3C;
diff --git a/drivers/w1/slaves/w1_ds2413.c b/drivers/w1/slaves/w1_ds2413.c
index c8cfac555b48..739009806467 100644
--- a/drivers/w1/slaves/w1_ds2413.c
+++ b/drivers/w1/slaves/w1_ds2413.c
@@ -99,8 +99,10 @@ static ssize_t output_write(struct file *filp, struct kobject *kobj,
 	if (w1_reset_select_slave(sl))
 		goto out;
 
-	/* according to the DS2413 datasheet the most significant 6 bits
-	   should be set to "1"s, so do it now */
+	/*
+	 * according to the DS2413 datasheet the most significant 6 bits
+	 * should be set to "1"s, so do it now
+	 */
 	*buf = *buf | 0xFC;
 
 	while (retries--) {
@@ -126,7 +128,7 @@ out:
 	return bytes_written;
 }
 
-static BIN_ATTR(output, S_IRUGO | S_IWUSR | S_IWGRP, NULL, output_write, 1);
+static BIN_ATTR(output, 0664, NULL, output_write, 1);
 
 static struct bin_attribute *w1_f3a_bin_attrs[] = {
 	&bin_attr_state,
diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
index 0f72df15a024..9f21fd98f799 100644
--- a/drivers/w1/slaves/w1_ds2433.c
+++ b/drivers/w1/slaves/w1_ds2433.c
@@ -42,7 +42,7 @@ struct w1_f23_data {
 	u32	validcrc;
 };
 
-/**
+/*
  * Check the file size bounds and adjusts count as needed.
  * This would not be needed if the file size didn't reset to 0 after a write.
  */
@@ -98,7 +98,8 @@ static ssize_t eeprom_read(struct file *filp, struct kobject *kobj,
 	u8 wrbuf[3];
 #endif
 
-	if ((count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE)) == 0)
+	count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE);
+	if (!count)
 		return 0;
 
 	mutex_lock(&sl->master->bus_mutex);
@@ -115,7 +116,7 @@ static ssize_t eeprom_read(struct file *filp, struct kobject *kobj,
 	}
 	memcpy(buf, &data->memory[off], count);
 
-#else 	/* CONFIG_W1_SLAVE_DS2433_CRC */
+#else	/* CONFIG_W1_SLAVE_DS2433_CRC */
 
 	/* read directly from the EEPROM */
 	if (w1_reset_select_slave(sl)) {
@@ -138,16 +139,17 @@ out_up:
 }
 
 /**
- * Writes to the scratchpad and reads it back for verification.
+ * w1_f23_write() - Writes to the scratchpad and reads it back for verification.
+ * @sl:		The slave structure
+ * @addr:	Address for the write
+ * @len:	length must be <= (W1_PAGE_SIZE - (addr & W1_PAGE_MASK))
+ * @data:	The data to write
+ *
  * Then copies the scratchpad to EEPROM.
  * The data must be on one page.
  * The master must be locked.
  *
- * @param sl	The slave structure
- * @param addr	Address for the write
- * @param len   length must be <= (W1_PAGE_SIZE - (addr & W1_PAGE_MASK))
- * @param data	The data to write
- * @return	0=Success -1=failure
+ * Return:	0=Success, -1=failure
  */
 static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
 {
@@ -207,7 +209,8 @@ static ssize_t eeprom_write(struct file *filp, struct kobject *kobj,
 	struct w1_slave *sl = kobj_to_w1_slave(kobj);
 	int addr, len, idx;
 
-	if ((count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE)) == 0)
+	count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE);
+	if (!count)
 		return 0;
 
 #ifdef CONFIG_W1_SLAVE_DS2433_CRC
diff --git a/drivers/w1/slaves/w1_ds2780.c b/drivers/w1/slaves/w1_ds2780.c
index 9dcb5a54f7fc..3cde1bb1886b 100644
--- a/drivers/w1/slaves/w1_ds2780.c
+++ b/drivers/w1/slaves/w1_ds2780.c
@@ -91,6 +91,7 @@ static ssize_t w1_slave_read(struct file *filp, struct kobject *kobj,
 			     loff_t off, size_t count)
 {
 	struct device *dev = kobj_to_dev(kobj);
+
 	return w1_ds2780_io(dev, buf, off, count, 0);
 }
 
diff --git a/drivers/w1/slaves/w1_ds2781.c b/drivers/w1/slaves/w1_ds2781.c
index 2cb7c020b607..e418484b4a49 100644
--- a/drivers/w1/slaves/w1_ds2781.c
+++ b/drivers/w1/slaves/w1_ds2781.c
@@ -88,6 +88,7 @@ static ssize_t w1_slave_read(struct file *filp, struct kobject *kobj,
 			     loff_t off, size_t count)
 {
 	struct device *dev = kobj_to_dev(kobj);
+
 	return w1_ds2781_io(dev, buf, off, count, 0);
 }
 
diff --git a/drivers/w1/slaves/w1_ds2805.c b/drivers/w1/slaves/w1_ds2805.c
index 6b5d12ba1b65..4c1a2c515317 100644
--- a/drivers/w1/slaves/w1_ds2805.c
+++ b/drivers/w1/slaves/w1_ds2805.c
@@ -264,7 +264,7 @@ out_up:
 static struct bin_attribute w1_f0d_bin_attr = {
 	.attr = {
 		.name = "eeprom",
-		.mode = S_IRUGO | S_IWUSR,
+		.mode = 0644,
 	},
 	.size = W1_F0D_EEPROM_SIZE,
 	.read = w1_f0d_read_bin,
diff --git a/drivers/w1/slaves/w1_ds28e04.c b/drivers/w1/slaves/w1_ds28e04.c
index 6cef6e2edb89..2854b8b9e93f 100644
--- a/drivers/w1/slaves/w1_ds28e04.c
+++ b/drivers/w1/slaves/w1_ds28e04.c
@@ -53,7 +53,7 @@ struct w1_f1C_data {
 	u32	validcrc;
 };
 
-/**
+/*
  * Check the file size bounds and adjusts count as needed.
  * This would not be needed if the file size didn't reset to 0 after a write.
  */
@@ -146,16 +146,17 @@ out_up:
 }
 
 /**
- * Writes to the scratchpad and reads it back for verification.
+ * w1_f1C_write() - Writes to the scratchpad and reads it back for verification.
+ * @sl:		The slave structure
+ * @addr:	Address for the write
+ * @len:	length must be <= (W1_PAGE_SIZE - (addr & W1_PAGE_MASK))
+ * @data:	The data to write
+ *
  * Then copies the scratchpad to EEPROM.
  * The data must be on one page.
  * The master must be locked.
  *
- * @param sl	The slave structure
- * @param addr	Address for the write
- * @param len   length must be <= (W1_PAGE_SIZE - (addr & W1_PAGE_MASK))
- * @param data	The data to write
- * @return	0=Success -1=failure
+ * Return:	0=Success, -1=failure
  */
 static int w1_f1C_write(struct w1_slave *sl, int addr, int len, const u8 *data)
 {
@@ -197,8 +198,10 @@ static int w1_f1C_write(struct w1_slave *sl, int addr, int len, const u8 *data)
 	wrbuf[3] = es;
 
 	for (i = 0; i < sizeof(wrbuf); ++i) {
-		/* issue 10ms strong pullup (or delay) on the last byte
-		   for writing the data from the scratchpad to EEPROM */
+		/*
+		 * issue 10ms strong pullup (or delay) on the last byte
+		 * for writing the data from the scratchpad to EEPROM
+		 */
 		if (w1_strong_pullup && i == sizeof(wrbuf)-1)
 			w1_next_pullup(sl->master, tm);
 
diff --git a/drivers/w1/slaves/w1_ds28e17.c b/drivers/w1/slaves/w1_ds28e17.c
index aed10b72fc99..52261b54d842 100644
--- a/drivers/w1/slaves/w1_ds28e17.c
+++ b/drivers/w1/slaves/w1_ds28e17.c
@@ -31,12 +31,12 @@ MODULE_ALIAS("w1-family-" __stringify(W1_FAMILY_DS28E17));
 
 /* Default I2C speed to be set when a DS28E17 is detected. */
 static int i2c_speed = 100;
-module_param_named(speed, i2c_speed, int, (S_IRUSR | S_IWUSR));
+module_param_named(speed, i2c_speed, int, 0600);
 MODULE_PARM_DESC(speed, "Default I2C speed to be set when a DS28E17 is detected");
 
 /* Default I2C stretch value to be set when a DS28E17 is detected. */
 static char i2c_stretch = 1;
-module_param_named(stretch, i2c_stretch, byte, (S_IRUSR | S_IWUSR));
+module_param_named(stretch, i2c_stretch, byte, 0600);
 MODULE_PARM_DESC(stretch, "Default I2C stretch value to be set when a DS28E17 is detected");
 
 /* DS28E17 device command codes. */
@@ -59,7 +59,7 @@ MODULE_PARM_DESC(stretch, "Default I2C stretch value to be set when a DS28E17 is
 /*
  * Maximum number of I2C bytes to transfer within one CRC16 protected onewire
  * command.
- * */
+ */
 #define W1_F19_WRITE_DATA_LIMIT 255
 
 /* Maximum number of I2C bytes to read with one onewire command. */
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index f2ae2e563dc5..9d199fed9628 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -170,7 +170,7 @@ static struct w1_family w1_default_family = {
 	.fops = &w1_default_fops,
 };
 
-static int w1_uevent(struct device *dev, struct kobj_uevent_env *env);
+static int w1_uevent(const struct device *dev, struct kobj_uevent_env *env);
 
 static struct bus_type w1_bus_type = {
 	.name = "w1",
@@ -577,11 +577,11 @@ void w1_destroy_master_attributes(struct w1_master *master)
 	sysfs_remove_group(&master->dev.kobj, &w1_master_defattr_group);
 }
 
-static int w1_uevent(struct device *dev, struct kobj_uevent_env *env)
+static int w1_uevent(const struct device *dev, struct kobj_uevent_env *env)
 {
-	struct w1_master *md = NULL;
-	struct w1_slave *sl = NULL;
-	char *event_owner, *name;
+	const struct w1_master *md = NULL;
+	const struct w1_slave *sl = NULL;
+	const char *event_owner, *name;
 	int err = 0;
 
 	if (dev->driver == &w1_master_driver) {
@@ -1166,6 +1166,8 @@ int w1_process(void *data)
 	/* remainder if it woke up early */
 	unsigned long jremain = 0;
 
+	atomic_inc(&dev->refcnt);
+
 	for (;;) {
 
 		if (!jremain && dev->search_count) {
@@ -1193,8 +1195,10 @@ int w1_process(void *data)
 		 */
 		mutex_unlock(&dev->list_mutex);
 
-		if (kthread_should_stop())
+		if (kthread_should_stop()) {
+			__set_current_state(TASK_RUNNING);
 			break;
+		}
 
 		/* Only sleep when the search is active. */
 		if (dev->search_count) {
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index b3e1792d9c49..3a71c5eb2f83 100644
--- a/drivers/w1/w1_int.c
+++ b/drivers/w1/w1_int.c
@@ -51,10 +51,9 @@ static struct w1_master *w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 	dev->search_count	= w1_search_count;
 	dev->enable_pullup	= w1_enable_pullup;
 
-	/* 1 for w1_process to decrement
-	 * 1 for __w1_remove_master_device to decrement
+	/* For __w1_remove_master_device to decrement
 	 */
-	atomic_set(&dev->refcnt, 2);
+	atomic_set(&dev->refcnt, 1);
 
 	INIT_LIST_HEAD(&dev->slist);
 	INIT_LIST_HEAD(&dev->async_list);