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Commit dcadb82a authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] rtl2832: use regmap reg cache 



Enable regmap register cache in order to reduce IO.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent e20b0cf2

drivers/media/dvb-frontends/rtl2832.c

+18 −0
Original line number Diff line number Diff line
@@ -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");