summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/mfd/Kconfig2
-rw-r--r--drivers/mfd/wm831x-core.c89
-rw-r--r--drivers/mfd/wm831x-i2c.c68
-rw-r--r--drivers/mfd/wm831x-spi.c60
-rw-r--r--include/linux/mfd/wm831x/core.h9
5 files changed, 58 insertions, 170 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 21574bdf485f..cfae5c594d24 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -404,6 +404,7 @@ config MFD_WM831X_I2C
bool "Support Wolfson Microelectronics WM831x/2x PMICs with I2C"
select MFD_CORE
select MFD_WM831X
+ select REGMAP_I2C
depends on I2C=y && GENERIC_HARDIRQS
help
Support for the Wolfson Microelecronics WM831x and WM832x PMICs
@@ -415,6 +416,7 @@ config MFD_WM831X_SPI
bool "Support Wolfson Microelectronics WM831x/2x PMICs with SPI"
select MFD_CORE
select MFD_WM831X
+ select REGMAP_SPI
depends on SPI_MASTER && GENERIC_HARDIRQS
help
Support for the Wolfson Microelecronics WM831x and WM832x PMICs
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 282e76ab678f..578e0c2ad82b 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -18,6 +18,7 @@
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/slab.h>
+#include <linux/err.h>
#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/pdata.h>
@@ -160,29 +161,6 @@ int wm831x_reg_unlock(struct wm831x *wm831x)
}
EXPORT_SYMBOL_GPL(wm831x_reg_unlock);
-static int wm831x_read(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *dest)
-{
- int ret, i;
- u16 *buf = dest;
-
- BUG_ON(bytes % 2);
- BUG_ON(bytes <= 0);
-
- ret = wm831x->read_dev(wm831x, reg, bytes, dest);
- if (ret < 0)
- return ret;
-
- for (i = 0; i < bytes / 2; i++) {
- buf[i] = be16_to_cpu(buf[i]);
-
- dev_vdbg(wm831x->dev, "Read %04x from R%d(0x%x)\n",
- buf[i], reg + i, reg + i);
- }
-
- return 0;
-}
-
/**
* wm831x_reg_read: Read a single WM831x register.
*
@@ -191,14 +169,10 @@ static int wm831x_read(struct wm831x *wm831x, unsigned short reg,
*/
int wm831x_reg_read(struct wm831x *wm831x, unsigned short reg)
{
- unsigned short val;
+ unsigned int val;
int ret;
- mutex_lock(&wm831x->io_lock);
-
- ret = wm831x_read(wm831x, reg, 2, &val);
-
- mutex_unlock(&wm831x->io_lock);
+ ret = regmap_read(wm831x->regmap, reg, &val);
if (ret < 0)
return ret;
@@ -218,15 +192,7 @@ EXPORT_SYMBOL_GPL(wm831x_reg_read);
int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
int count, u16 *buf)
{
- int ret;
-
- mutex_lock(&wm831x->io_lock);
-
- ret = wm831x_read(wm831x, reg, count * 2, buf);
-
- mutex_unlock(&wm831x->io_lock);
-
- return ret;
+ return regmap_bulk_read(wm831x->regmap, reg, buf, count);
}
EXPORT_SYMBOL_GPL(wm831x_bulk_read);
@@ -234,7 +200,7 @@ static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
int bytes, void *src)
{
u16 *buf = src;
- int i;
+ int i, ret;
BUG_ON(bytes % 2);
BUG_ON(bytes <= 0);
@@ -245,11 +211,10 @@ static int wm831x_write(struct wm831x *wm831x, unsigned short reg,
dev_vdbg(wm831x->dev, "Write %04x to R%d(0x%x)\n",
buf[i], reg + i, reg + i);
-
- buf[i] = cpu_to_be16(buf[i]);
+ ret = regmap_write(wm831x->regmap, reg + i, buf[i]);
}
- return wm831x->write_dev(wm831x, reg, bytes, src);
+ return 0;
}
/**
@@ -286,20 +251,14 @@ int wm831x_set_bits(struct wm831x *wm831x, unsigned short reg,
unsigned short mask, unsigned short val)
{
int ret;
- u16 r;
mutex_lock(&wm831x->io_lock);
- ret = wm831x_read(wm831x, reg, 2, &r);
- if (ret < 0)
- goto out;
-
- r &= ~mask;
- r |= val & mask;
-
- ret = wm831x_write(wm831x, reg, 2, &r);
+ if (!wm831x_reg_locked(wm831x, reg))
+ ret = regmap_update_bits(wm831x->regmap, reg, mask, val);
+ else
+ ret = -EPERM;
-out:
mutex_unlock(&wm831x->io_lock);
return ret;
@@ -1292,6 +1251,12 @@ static struct mfd_cell backlight_devs[] = {
},
};
+struct regmap_config wm831x_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 16,
+};
+EXPORT_SYMBOL_GPL(wm831x_regmap_config);
+
/*
* Instantiate the generic non-control parts of the device.
*/
@@ -1309,7 +1274,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
- goto err;
+ goto err_regmap;
}
switch (ret) {
case 0x6204:
@@ -1318,20 +1283,20 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
default:
dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
ret = -EINVAL;
- goto err;
+ goto err_regmap;
}
ret = wm831x_reg_read(wm831x, WM831X_REVISION);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read revision: %d\n", ret);
- goto err;
+ goto err_regmap;
}
rev = (ret & WM831X_PARENT_REV_MASK) >> WM831X_PARENT_REV_SHIFT;
ret = wm831x_reg_read(wm831x, WM831X_RESET_ID);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read device ID: %d\n", ret);
- goto err;
+ goto err_regmap;
}
/* Some engineering samples do not have the ID set, rely on
@@ -1406,7 +1371,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
default:
dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
ret = -EINVAL;
- goto err;
+ goto err_regmap;
}
/* This will need revisiting in future but is OK for all
@@ -1420,7 +1385,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
ret = wm831x_reg_read(wm831x, WM831X_SECURITY_KEY);
if (ret < 0) {
dev_err(wm831x->dev, "Failed to read security key: %d\n", ret);
- goto err;
+ goto err_regmap;
}
if (ret != 0) {
dev_warn(wm831x->dev, "Security key had non-zero value %x\n",
@@ -1433,7 +1398,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
ret = pdata->pre_init(wm831x);
if (ret != 0) {
dev_err(wm831x->dev, "pre_init() failed: %d\n", ret);
- goto err;
+ goto err_regmap;
}
}
@@ -1456,7 +1421,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
ret = wm831x_irq_init(wm831x, irq);
if (ret != 0)
- goto err;
+ goto err_regmap;
wm831x_auxadc_init(wm831x);
@@ -1552,8 +1517,9 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
err_irq:
wm831x_irq_exit(wm831x);
-err:
+err_regmap:
mfd_remove_devices(wm831x->dev);
+ regmap_exit(wm831x->regmap);
kfree(wm831x);
return ret;
}
@@ -1565,6 +1531,7 @@ void wm831x_device_exit(struct wm831x *wm831x)
if (wm831x->irq_base)
free_irq(wm831x->irq_base + WM831X_IRQ_AUXADC_DATA, wm831x);
wm831x_irq_exit(wm831x);
+ regmap_exit(wm831x->regmap);
kfree(wm831x);
}
diff --git a/drivers/mfd/wm831x-i2c.c b/drivers/mfd/wm831x-i2c.c
index a06cbc739716..3ec6085d5fc0 100644
--- a/drivers/mfd/wm831x-i2c.c
+++ b/drivers/mfd/wm831x-i2c.c
@@ -18,67 +18,17 @@
#include <linux/delay.h>
#include <linux/mfd/core.h>
#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/regmap.h>
#include <linux/mfd/wm831x/core.h>
#include <linux/mfd/wm831x/pdata.h>
-static int wm831x_i2c_read_device(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *dest)
-{
- struct i2c_client *i2c = wm831x->control_data;
- int ret;
- u16 r = cpu_to_be16(reg);
-
- ret = i2c_master_send(i2c, (unsigned char *)&r, 2);
- if (ret < 0)
- return ret;
- if (ret != 2)
- return -EIO;
-
- ret = i2c_master_recv(i2c, dest, bytes);
- if (ret < 0)
- return ret;
- if (ret != bytes)
- return -EIO;
- return 0;
-}
-
-/* Currently we allocate the write buffer on the stack; this is OK for
- * small writes - if we need to do large writes this will need to be
- * revised.
- */
-static int wm831x_i2c_write_device(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *src)
-{
- struct i2c_client *i2c = wm831x->control_data;
- struct i2c_msg xfer[2];
- int ret;
-
- reg = cpu_to_be16(reg);
-
- xfer[0].addr = i2c->addr;
- xfer[0].flags = 0;
- xfer[0].len = 2;
- xfer[0].buf = (char *)&reg;
-
- xfer[1].addr = i2c->addr;
- xfer[1].flags = I2C_M_NOSTART;
- xfer[1].len = bytes;
- xfer[1].buf = (char *)src;
-
- ret = i2c_transfer(i2c->adapter, xfer, 2);
- if (ret < 0)
- return ret;
- if (ret != 2)
- return -EIO;
-
- return 0;
-}
-
static int wm831x_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm831x *wm831x;
+ int ret;
wm831x = kzalloc(sizeof(struct wm831x), GFP_KERNEL);
if (wm831x == NULL)
@@ -86,9 +36,15 @@ static int wm831x_i2c_probe(struct i2c_client *i2c,
i2c_set_clientdata(i2c, wm831x);
wm831x->dev = &i2c->dev;
- wm831x->control_data = i2c;
- wm831x->read_dev = wm831x_i2c_read_device;
- wm831x->write_dev = wm831x_i2c_write_device;
+
+ wm831x->regmap = regmap_init_i2c(i2c, &wm831x_regmap_config);
+ if (IS_ERR(wm831x->regmap)) {
+ ret = PTR_ERR(wm831x->regmap);
+ dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
+ ret);
+ kfree(wm831x);
+ return ret;
+ }
return wm831x_device_init(wm831x, id->driver_data, i2c->irq);
}
diff --git a/drivers/mfd/wm831x-spi.c b/drivers/mfd/wm831x-spi.c
index eed8e4f7a5a1..dbe11472afce 100644
--- a/drivers/mfd/wm831x-spi.c
+++ b/drivers/mfd/wm831x-spi.c
@@ -16,58 +16,16 @@
#include <linux/module.h>
#include <linux/pm.h>
#include <linux/spi/spi.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
#include <linux/mfd/wm831x/core.h>
-static int wm831x_spi_read_device(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *dest)
-{
- u16 tx_val;
- u16 *d = dest;
- int r, ret;
-
- /* Go register at a time */
- for (r = reg; r < reg + (bytes / 2); r++) {
- tx_val = r | 0x8000;
-
- ret = spi_write_then_read(wm831x->control_data,
- (u8 *)&tx_val, 2, (u8 *)d, 2);
- if (ret != 0)
- return ret;
-
- *d = be16_to_cpu(*d);
-
- d++;
- }
-
- return 0;
-}
-
-static int wm831x_spi_write_device(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *src)
-{
- struct spi_device *spi = wm831x->control_data;
- u16 *s = src;
- u16 data[2];
- int ret, r;
-
- /* Go register at a time */
- for (r = reg; r < reg + (bytes / 2); r++) {
- data[0] = r;
- data[1] = *s++;
-
- ret = spi_write(spi, (char *)&data, sizeof(data));
- if (ret != 0)
- return ret;
- }
-
- return 0;
-}
-
static int __devinit wm831x_spi_probe(struct spi_device *spi)
{
struct wm831x *wm831x;
enum wm831x_parent type;
+ int ret;
/* Currently SPI support for ID tables is unmerged, we're faking it */
if (strcmp(spi->modalias, "wm8310") == 0)
@@ -98,9 +56,15 @@ static int __devinit wm831x_spi_probe(struct spi_device *spi)
dev_set_drvdata(&spi->dev, wm831x);
wm831x->dev = &spi->dev;
- wm831x->control_data = spi;
- wm831x->read_dev = wm831x_spi_read_device;
- wm831x->write_dev = wm831x_spi_write_device;
+
+ wm831x->regmap = regmap_init_spi(wm831x->dev, &wm831x_regmap_config);
+ if (IS_ERR(wm831x->regmap)) {
+ ret = PTR_ERR(wm831x->regmap);
+ dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
+ ret);
+ kfree(wm831x);
+ return ret;
+ }
return wm831x_device_init(wm831x, type, spi->irq);
}
diff --git a/include/linux/mfd/wm831x/core.h b/include/linux/mfd/wm831x/core.h
index 8dda8ded5cda..44acdb25681b 100644
--- a/include/linux/mfd/wm831x/core.h
+++ b/include/linux/mfd/wm831x/core.h
@@ -18,6 +18,7 @@
#include <linux/completion.h>
#include <linux/interrupt.h>
#include <linux/list.h>
+#include <linux/regmap.h>
/*
* Register values.
@@ -361,12 +362,8 @@ struct wm831x {
struct mutex io_lock;
struct device *dev;
- int (*read_dev)(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *dest);
- int (*write_dev)(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *src);
- void *control_data;
+ struct regmap *regmap;
int irq; /* Our chip IRQ */
struct mutex irq_lock;
@@ -416,4 +413,6 @@ int wm831x_irq_init(struct wm831x *wm831x, int irq);
void wm831x_irq_exit(struct wm831x *wm831x);
void wm831x_auxadc_init(struct wm831x *wm831x);
+extern struct regmap_config wm831x_regmap_config;
+
#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-19 22:02:57 +0000