Commit 5555309c authored by Michael Krufky's avatar Michael Krufky Committed by Mauro Carvalho Chehab
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V4L/DVB (7383): tda18271: add attach-time parameter to limit i2c transfer size 



Add attach-time parameter, "small_i2c" to limit i2c transfer size to write
at most 16 registers at a time during initialization.

Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent ab8b870e

drivers/media/dvb/frontends/tda18271-common.c

+6 −1
Original line number Diff line number Diff line
@@ -311,6 +311,11 @@ int tda18271_init_regs(struct dvb_frontend *fe) 
	regs[R_EB22] = 0x48;

	regs[R_EB23] = 0xb0;



	if (priv->small_i2c) {

		tda18271_write_regs(fe, 0x00, 0x10);

		tda18271_write_regs(fe, 0x10, 0x10);

		tda18271_write_regs(fe, 0x20, 0x07);

	} else

		tda18271_write_regs(fe, 0x00, TDA18271_NUM_REGS);



	/* setup agc1 gain */

drivers/media/dvb/frontends/tda18271-fe.c

+3 −0
Original line number Diff line number Diff line
@@ -1081,6 +1081,9 @@ struct dvb_frontend *tda18271_attach(struct dvb_frontend *fe, u8 addr, 


		fe->tuner_priv = priv;



		if (cfg)

			priv->small_i2c = cfg->small_i2c;



		if (tda18271_get_id(fe) < 0)

			goto fail;

drivers/media/dvb/frontends/tda18271-priv.h

+1 −0
Original line number Diff line number Diff line
@@ -110,6 +110,7 @@ struct tda18271_priv { 


	unsigned int tm_rfcal;

	unsigned int cal_initialized:1;

	unsigned int small_i2c:1;



	struct tda18271_map_layout *maps;

	struct tda18271_std_map std;

drivers/media/dvb/frontends/tda18271.h

+3 −0
Original line number Diff line number Diff line
@@ -58,6 +58,9 @@ struct tda18271_config { 


	/* use i2c gate provided by analog or digital demod */

	enum tda18271_i2c_gate gate;



	/* some i2c providers cant write all 39 registers at once */

	unsigned int small_i2c:1;

};



#if defined(CONFIG_DVB_TDA18271) || (defined(CONFIG_DVB_TDA18271_MODULE) && defined(MODULE))