diff options
| author | Mattias Nilsson <mattias.i.nilsson@stericsson.com> | 2012-03-08 14:02:20 +0100 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-03-16 19:45:33 +0100 |
| commit | bc628fd19d2d1d053b88fa225bb599be026c048b (patch) | |
| tree | d314ae4ddcb2804f68179c98a17581b33356fe96 /drivers | |
| parent | 3c3e489831b601e566f6bc47e711f5847fb93dff (diff) | |
mfd: Make use of the ab8500 firmware read-modify-write service
This patch updates the AB8500 driver to make use of the I2C
read-modify-write service in the PRCMU firmware.
Signed-off-by: Mattias Nilsson <mattias.i.nilsson@stericsson.com>
Reviewed-by: Mattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/ab8500-core.c | 37 | ||||
| -rw-r--r-- | drivers/mfd/ab8500-i2c.c | 15 |
2 files changed, 37 insertions, 15 deletions
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c index c637c8d2e7d..1f08704f7ae 100644 --- a/drivers/mfd/ab8500-core.c +++ b/drivers/mfd/ab8500-core.c @@ -201,29 +201,38 @@ static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank, u8 reg, u8 bitmask, u8 bitvalues) { int ret; - u8 data; /* put the u8 bank and u8 reg together into a an u16. * bank on higher 8 bits and reg in lower */ u16 addr = ((u16)bank) << 8 | reg; mutex_lock(&ab8500->lock); - ret = ab8500->read(ab8500, addr); - if (ret < 0) { - dev_err(ab8500->dev, "failed to read reg %#x: %d\n", - addr, ret); - goto out; - } + if (ab8500->write_masked == NULL) { + u8 data; - data = (u8)ret; - data = (~bitmask & data) | (bitmask & bitvalues); + ret = ab8500->read(ab8500, addr); + if (ret < 0) { + dev_err(ab8500->dev, "failed to read reg %#x: %d\n", + addr, ret); + goto out; + } - ret = ab8500->write(ab8500, addr, data); - if (ret < 0) - dev_err(ab8500->dev, "failed to write reg %#x: %d\n", - addr, ret); + data = (u8)ret; + data = (~bitmask & data) | (bitmask & bitvalues); + + ret = ab8500->write(ab8500, addr, data); + if (ret < 0) + dev_err(ab8500->dev, "failed to write reg %#x: %d\n", + addr, ret); - dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, data); + dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, + data); + goto out; + } + ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues); + if (ret < 0) + dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr, + ret); out: mutex_unlock(&ab8500->lock); return ret; diff --git a/drivers/mfd/ab8500-i2c.c b/drivers/mfd/ab8500-i2c.c index 70a16ae856a..b83045f102b 100644 --- a/drivers/mfd/ab8500-i2c.c +++ b/drivers/mfd/ab8500-i2c.c @@ -11,7 +11,7 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/mfd/abx500/ab8500.h> -#include <linux/mfd/db8500-prcmu.h> +#include <linux/mfd/dbx500-prcmu.h> static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data) { @@ -23,6 +23,18 @@ static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data) return ret; } +static int ab8500_i2c_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask, + u8 data) +{ + int ret; + + ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data, + &mask, 1); + if (ret < 0) + dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); + return ret; +} + static int ab8500_i2c_read(struct ab8500 *ab8500, u16 addr) { int ret; @@ -59,6 +71,7 @@ static int __devinit ab8500_i2c_probe(struct platform_device *plf) ab8500->read = ab8500_i2c_read; ab8500->write = ab8500_i2c_write; + ab8500->write_masked = ab8500_i2c_write_masked; platform_set_drvdata(plf, ab8500); |