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| author |   Antti Palosaari <crope@iki.fi> | 2014-12-14 16:23:28 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-02-03 16:10:54 -0200 |
| commit | dcadb82a7a1d844f79c83578b5d2840fdb2a3ddd (patch) | |
| tree | 855b5ed3c1867a7a93980454d64ddef5939e4379 /drivers/media | |
| parent | [media] rtl28xxu: add support for RTL2832U/RTL2832 PID filter (diff) | |
| download | linux-dev-dcadb82a7a1d844f79c83578b5d2840fdb2a3ddd.tar.xz linux-dev-dcadb82a7a1d844f79c83578b5d2840fdb2a3ddd.zip | |
[media] rtl2832: use regmap reg cache
Enable regmap register cache in order to reduce IO.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c index e59765fa8e7c..66f915dd24a6 100644 --- a/drivers/media/dvb-frontends/rtl2832.c +++ b/drivers/media/dvb-frontends/rtl2832.c @@ -986,6 +986,22 @@ static struct dvb_frontend_ops rtl2832_ops = { .read_ber = rtl2832_read_ber, }; +static bool rtl2832_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case 0x305: + case 0x33c: + case 0x34e: + case 0x351: + case 0x40c ... 0x40d: + return true; + default: + break; + } + + return false; +} + /* * We implement own I2C access routines for regmap in order to get manual access * to I2C adapter lock, which is needed for I2C mux adapter. @@ -1240,9 +1256,11 @@ static int rtl2832_probe(struct i2c_client *client, static const struct regmap_config regmap_config = { .reg_bits = 8, .val_bits = 8, + .volatile_reg = rtl2832_volatile_reg, .max_register = 5 * 0x100, .ranges = regmap_range_cfg, .num_ranges = ARRAY_SIZE(regmap_range_cfg), + .cache_type = REGCACHE_RBTREE, }; dev_dbg(&client->dev, "\n"); |