diff options
| -rw-r--r-- | drivers/mfd/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/mfd/wm831x-core.c | 89 | ||||
| -rw-r--r-- | drivers/mfd/wm831x-i2c.c | 68 | ||||
| -rw-r--r-- | drivers/mfd/wm831x-spi.c | 60 | ||||
| -rw-r--r-- | include/linux/mfd/wm831x/core.h | 9 |
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 *)® - - 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 |