[media] em28xx: implement FE set_lna() callback (13a5336e) · Commits · 戴 / test

drivers/media/usb/em28xx/em28xx-dvb.c

+36 −5

Original line number	Diff line number	Diff line
		@@ -81,6 +81,7 @@ struct em28xx_dvb {
		int (gate_ctrl)(struct dvb_frontend , int);
		struct semaphore pll_mutex;
		bool dont_attach_fe1;
		int lna_gpio;
		};


		@@ -568,6 +569,33 @@ static void pctv_520e_init(struct em28xx *dev)
		i2c_master_send(&dev->i2c_client, regs[i].r, regs[i].len);
		};

		static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe, int val)
		{
		struct em28xx *dev = fe->dvb->priv;
		#ifdef CONFIG_GPIOLIB
		struct em28xx_dvb *dvb = dev->dvb;
		int ret;
		unsigned long flags;

		if (val)
		flags = GPIOF_OUT_INIT_LOW;
		else
		flags = GPIOF_OUT_INIT_HIGH;

		ret = gpio_request_one(dvb->lna_gpio, flags, NULL);
		if (ret)
		em28xx_errdev("gpio request failed %d\n", ret);
		else
		gpio_free(dvb->lna_gpio);

		return ret;
		#else
		dev_warn(&dev->udev->dev, "%s: LNA control is disabled\n",
		KBUILD_MODNAME);
		return 0;
		#endif
		}

		static int em28xx_mt352_terratec_xs_init(struct dvb_frontend *fe)
		{
		/* Values extracted from a USB trace of the Terratec Windows driver */
		@@ -809,7 +837,7 @@ static void em28xx_unregister_dvb(struct em28xx_dvb *dvb)

		static int em28xx_dvb_init(struct em28xx *dev)
		{
		int result = 0, mfe_shared = 0, gpio_chip_base;
		int result = 0, mfe_shared = 0;
		struct em28xx_dvb *dvb;

		if (!dev->board.has_dvb) {
		@@ -958,7 +986,7 @@ static int em28xx_dvb_init(struct em28xx *dev)
		dvb->fe[0] = dvb_attach(cxd2820r_attach,
		&em28xx_cxd2820r_config,
		&dev->i2c_adap,
		&gpio_chip_base);
		&dvb->lna_gpio);
		if (dvb->fe[0]) {
		/* FE 0 attach tuner */
		if (!dvb_attach(tda18271_attach,
		@@ -973,15 +1001,18 @@ static int em28xx_dvb_init(struct em28xx *dev)
		}
		}

		#ifdef CONFIG_GPIOLIB
		/* enable LNA for DVB-T, DVB-T2 and DVB-C */
		result = gpio_request_one(gpio_chip_base, GPIOF_INIT_LOW,
		"LNA");
		result = gpio_request_one(dvb->lna_gpio, GPIOF_OUT_INIT_LOW,
		NULL);
		if (result)
		em28xx_errdev("gpio request failed %d\n", result);
		else
		gpio_free(gpio_chip_base);
		gpio_free(dvb->lna_gpio);

		result = 0; /* continue even set LNA fails */
		#endif
		dvb->fe[0]->ops.set_lna = em28xx_pctv_290e_set_lna;
		break;
		case EM2884_BOARD_HAUPPAUGE_WINTV_HVR_930C:
		{

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