C++ IMX_GPIO_NR函数代码示例

static void ov5640_mipi_camera_io_init(void)
{
	IOMUX_SETUP(mipi_pads);

	pr_info("%s\n", __func__);
	mipi_pwm = pwm_request(2, "mipi_clock");
	if (IS_ERR(mipi_pwm)) {
		pr_err("unable to request PWM for mipi_clock\n");
	} else {
		unsigned period = 1000/22;
		pr_info("got pwm for mipi_clock\n");
		pwm_config(mipi_pwm, period >> 1, period);
		pwm_enable(mipi_pwm);
	}

	camera_reset(IMX_GPIO_NR(6, 9), 1, IMX_GPIO_NR(2, 5), IMX_GPIO_NR(6, 11));
/* for mx6dl, mipi virtual channel 1 connect to csi 1*/
	if (cpu_is_mx6dl())
		mxc_iomux_set_gpr_register(13, 3, 3, 1);
}

static void wand_suspend_exit(void) {
	gpio_direction_output(IMX_GPIO_NR(2, 8), 1);
	gpio_direction_output(IMX_GPIO_NR(2, 9), 1);
	gpio_direction_output(IMX_GPIO_NR(2, 10), 1);
	gpio_direction_output(IMX_GPIO_NR(2, 11), 1);

	gpio_direction_output(WAND_WL_RST_N, 1);
	if (wand_revision == WAND_REV_C1) {
		gpio_set_value(WAND_BT_WAKE_C1, 1);
		gpio_direction_output(WAND_WL_REF_ON_C1, 1);
	} else {
		gpio_direction_output(WAND_WL_REF_ON_AB, 1);
		gpio_set_value(WAND_BT_WAKE_AB, 1);
        }
	gpio_direction_output(WAND_WL_REG_ON, 1);

	gpio_set_value(WAND_WL_WAKE, 1);

	gpio_set_value(WAND_USB_HOST_PWR_EN, 1);
}

int board_mmc_getcd(struct mmc *mmc)
{
	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
	int ret = 0;

	switch (cfg->esdhc_base) {
	case USDHC2_BASE_ADDR:
		gpio_direction_input(IMX_GPIO_NR(1, 4));
		ret = !gpio_get_value(IMX_GPIO_NR(1, 4));
		break;
	case USDHC4_BASE_ADDR:
		gpio_direction_input(IMX_GPIO_NR(2, 6));
		ret = !gpio_get_value(IMX_GPIO_NR(2, 6));
		break;
	default:
		printf("Bad USDHC interface\n");
	}

	return ret;
}

static int pca100_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
		void *data)
{
	int ret;

	ret = request_irq(gpio_to_irq(IMX_GPIO_NR(3, 29)), detect_irq,
			  IRQF_TRIGGER_FALLING, "imx-mmc-detect", data);
	if (ret)
		printk(KERN_ERR
			"pca100: Failed to request irq for sd/mmc detection\n");

	return ret;
}

int board_ehci_hcd_init(int port)
{
	if (port == 0) {
		/* USB OTG PWRON */
		imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX53_PAD_GPIO_4__GPIO1_4,
					PAD_CTL_PKE | PAD_CTL_DSE_HIGH));
		gpio_direction_output(IMX_GPIO_NR(1, 4), 0);

		/* USB OTG Over Current */
		imx_iomux_v3_setup_pad(MX53_PAD_GPIO_18__GPIO7_13);
	} else if (port == 1) {
		/* USB Host PWRON */
		imx_iomux_v3_setup_pad(NEW_PAD_CTRL(MX53_PAD_GPIO_2__GPIO1_2,
					PAD_CTL_PKE | PAD_CTL_DSE_HIGH));
		gpio_direction_output(IMX_GPIO_NR(1, 2), 0);

		/* USB Host Over Current */
		imx_iomux_v3_setup_pad(MX53_PAD_GPIO_3__USBOH3_USBH1_OC);
	}

	return 0;
}

static void setup_display(void)
{
	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
	int reg;

	enable_ipu_clock();
	imx_setup_hdmi();
	/* Turn on LDB0,IPU,IPU DI0 clocks */
	reg = __raw_readl(&mxc_ccm->CCGR3);
	reg |= MXC_CCM_CCGR3_LDB_DI0_MASK;
	writel(reg, &mxc_ccm->CCGR3);

	/* set LDB0, LDB1 clk select to 011/011 */
	reg = readl(&mxc_ccm->cs2cdr);
	reg &= ~(MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_MASK
		 |MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_MASK);
	reg |= (3<<MXC_CCM_CS2CDR_LDB_DI0_CLK_SEL_OFFSET)
	      |(3<<MXC_CCM_CS2CDR_LDB_DI1_CLK_SEL_OFFSET);
	writel(reg, &mxc_ccm->cs2cdr);

	reg = readl(&mxc_ccm->cscmr2);
	reg |= MXC_CCM_CSCMR2_LDB_DI0_IPU_DIV;
	writel(reg, &mxc_ccm->cscmr2);

	reg = readl(&mxc_ccm->chsccdr);
	reg |= (CHSCCDR_CLK_SEL_LDB_DI0
		<<MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_OFFSET);
	writel(reg, &mxc_ccm->chsccdr);

	reg = IOMUXC_GPR2_BGREF_RRMODE_EXTERNAL_RES
	     |IOMUXC_GPR2_DI1_VS_POLARITY_ACTIVE_HIGH
	     |IOMUXC_GPR2_DI0_VS_POLARITY_ACTIVE_LOW
	     |IOMUXC_GPR2_BIT_MAPPING_CH1_SPWG
	     |IOMUXC_GPR2_DATA_WIDTH_CH1_18BIT
	     |IOMUXC_GPR2_BIT_MAPPING_CH0_SPWG
	     |IOMUXC_GPR2_DATA_WIDTH_CH0_18BIT
	     |IOMUXC_GPR2_LVDS_CH1_MODE_DISABLED
	     |IOMUXC_GPR2_LVDS_CH0_MODE_ENABLED_DI0;
	writel(reg, &iomux->gpr[2]);

	reg = readl(&iomux->gpr[3]);
	reg = (reg & ~IOMUXC_GPR3_LVDS0_MUX_CTL_MASK)
	    | (IOMUXC_GPR3_MUX_SRC_IPU1_DI0
	       <<IOMUXC_GPR3_LVDS0_MUX_CTL_OFFSET);
	writel(reg, &iomux->gpr[3]);

	/* LVDS Backlight GPIO on LVDS connector - output low */
	SETUP_IOMUX_PAD(PAD_SD2_CLK__GPIO1_IO10 | DIO_PAD_CFG);
	gpio_direction_output(IMX_GPIO_NR(1, 10), 0);
}

int board_early_init_f(void)
{
	setup_iomux_uart();
	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);

	/* Enable PERI_3V3, which is used by SD2, ENET, LVDS, BT */
	imx_iomux_v3_setup_multiple_pads(peri_3v3_pads,
					 ARRAY_SIZE(peri_3v3_pads));

	/* Active high for ncp692 */
	gpio_direction_output(IMX_GPIO_NR(4, 16) , 1);

	return 0;
}

static void __init mx27pdk_init(void)
{
	int ret;
	imx27_soc_init();

	mxc_gpio_setup_multiple_pins(mx27pdk_pins, ARRAY_SIZE(mx27pdk_pins),
		"mx27pdk");
	mx27_3ds_sdhc1_enable_level_translator();
	imx27_add_imx_uart0(&uart_pdata);
	imx27_add_fec(NULL);
	imx27_add_imx_keypad(&mx27_3ds_keymap_data);
	imx27_add_mxc_mmc(0, &sdhc1_pdata);
	imx27_add_imx2_wdt();
	otg_phy_init();

	if (otg_mode_host) {
		otg_pdata.otg = imx_otg_ulpi_create(ULPI_OTG_DRVVBUS |
				ULPI_OTG_DRVVBUS_EXT);

		if (otg_pdata.otg)
			imx27_add_mxc_ehci_otg(&otg_pdata);
	}

	if (!otg_mode_host)
		imx27_add_fsl_usb2_udc(&otg_device_pdata);

	imx27_add_spi_imx1(&spi2_pdata);
	imx27_add_spi_imx0(&spi1_pdata);
	mx27_3ds_spi_devs[0].irq = gpio_to_irq(PMIC_INT);
	spi_register_board_info(mx27_3ds_spi_devs,
						ARRAY_SIZE(mx27_3ds_spi_devs));

	if (mxc_expio_init(MX27_CS5_BASE_ADDR, IMX_GPIO_NR(3, 28)))
		pr_warn("Init of the debugboard failed, all devices on the debugboard are unusable.\n");
	imx27_add_imx_i2c(0, &mx27_3ds_i2c0_data);
	platform_add_devices(devices, ARRAY_SIZE(devices));
	imx27_add_imx_fb(&mx27_3ds_fb_data);

	ret = gpio_request_array(mx27_3ds_camera_gpios,
				 ARRAY_SIZE(mx27_3ds_camera_gpios));
	if (ret) {
		pr_err("Failed to request camera gpios");
		iclink_ov2640.power = NULL;
	}

	imx27_add_mx2_camera(&mx27_3ds_cam_pdata);
	imx27_add_imx_ssi(0, &mx27_3ds_ssi_pdata);

	imx_add_platform_device("imx_mc13783", 0, NULL, 0, NULL, 0);
}

int board_recovery_init_f(void)
{
    gpio_direction_input(IMX_GPIO_NR(3, 16));
    if (!gpio_get_value(IMX_GPIO_NR(3, 16))) {
        puts("RECOVERY SWITCH PRESSED\n");
        puts("trying to assume sensible defaults\n");

        setenv("bootdelay", "30");
        setenv("recovery", "1");

        /* these have to be set before setup_display() */
        setenv("hdmi_xres", "640");
        setenv("hdmi_yres", "480");
        setenv("hdmi_refresh", "60");

        /* prevent a misconfigured preboot from breaking recovery */
        setenv("preboot", "usb start");
    } else {
        setenv("recovery", "0");
    }

    return 0;
}

void do_enable_lvds(struct lcd_panel_info_t const *dev)
{
	enable_lcdif_clock(dev->lcdif_base_addr);
	enable_lvds(dev->lcdif_base_addr);

	imx_iomux_v3_setup_multiple_pads(lvds_ctrl_pads,
							ARRAY_SIZE(lvds_ctrl_pads));

#ifdef CONFIG_MAX7310_IOEXP
	/* LVDS Enable pin */
	gpio_exp_direction_output(LVDS_EN_PIN , 1);
#endif

	/* Set Brightness to high */
	gpio_direction_output(IMX_GPIO_NR(6, 3) , 1);
}

static void __init pcm038_init(void)
{
	imx27_soc_init();

	mxc_gpio_setup_multiple_pins(pcm038_pins, ARRAY_SIZE(pcm038_pins),
			"PCM038");

	pcm038_init_sram();

	imx27_add_imx_uart0(&uart_pdata);
	imx27_add_imx_uart1(&uart_pdata);
	imx27_add_imx_uart2(&uart_pdata);

	mxc_gpio_mode(PE16_AF_OWIRE);
	imx27_add_mxc_nand(&pcm038_nand_board_info);

	/* only the i2c master 1 is used on this CPU card */
	i2c_register_board_info(1, pcm038_i2c_devices,
				ARRAY_SIZE(pcm038_i2c_devices));

	imx27_add_imx_i2c(1, &pcm038_i2c1_data);

	/* PE18 for user-LED D40 */
	mxc_gpio_mode(GPIO_PORTE | 18 | GPIO_GPIO | GPIO_OUT);

	mxc_gpio_mode(GPIO_PORTD | 28 | GPIO_GPIO | GPIO_OUT);

	/* MC13783 IRQ */
	mxc_gpio_mode(GPIO_PORTB | 23 | GPIO_GPIO | GPIO_IN);

	imx27_add_spi_imx0(&pcm038_spi0_data);
	pcm038_spi_board_info[0].irq = gpio_to_irq(IMX_GPIO_NR(2, 23));
	spi_register_board_info(pcm038_spi_board_info,
				ARRAY_SIZE(pcm038_spi_board_info));

	imx27_add_mxc_ehci_hs(2, &usbh2_pdata);

	imx27_add_fec(NULL);
	platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
	imx27_add_imx2_wdt();
	imx27_add_mxc_w1();

#ifdef CONFIG_MACH_PCM970_BASEBOARD
	pcm970_baseboard_init();
#endif
}

/*
 * Board specific initialization.
 */
static void __init mx35_3ds_init(void)
{
	struct platform_device *imx35_fb_pdev;

	imx35_soc_init();

	mxc_iomux_v3_setup_multiple_pads(mx35pdk_pads, ARRAY_SIZE(mx35pdk_pads));

	imx35_add_fec(NULL);
	imx35_add_imx2_wdt();
	imx35_add_mxc_rtc();
	platform_add_devices(devices, ARRAY_SIZE(devices));

	imx35_add_imx_uart0(&uart_pdata);

	if (otg_mode_host)
		imx35_add_mxc_ehci_otg(&otg_pdata);

	imx35_add_mxc_ehci_hs(&usb_host_pdata);

	if (!otg_mode_host)
		imx35_add_fsl_usb2_udc(&usb_otg_pdata);

	imx35_add_mxc_nand(&mx35pdk_nand_board_info);
	imx35_add_sdhci_esdhc_imx(0, NULL);

	if (mxc_expio_init(MX35_CS5_BASE_ADDR, IMX_GPIO_NR(1, 1)))
		pr_warn("Init of the debugboard failed, all "
				"devices on the debugboard are unusable.\n");
	imx35_add_imx_i2c0(&mx35_3ds_i2c0_data);

	i2c_register_board_info(
		0, i2c_devices_3ds, ARRAY_SIZE(i2c_devices_3ds));

	imx35_add_ipu_core();
	platform_device_register(&mx35_3ds_ov2640);
	imx35_3ds_init_camera();

	imx35_fb_pdev = imx35_add_mx3_sdc_fb(&mx3fb_pdata);
	mx35_3ds_lcd.dev.parent = &imx35_fb_pdev->dev;
	platform_device_register(&mx35_3ds_lcd);

	imx35_3ds_init_mc13892();
}

static inline void tx51_fec_init(void)
{
	int i;

	/* Configure LAN8700 pads as GPIO and set up
	 * necessary strap options for PHY
	 */
	for (i = 0; i < ARRAY_SIZE(tx51_fec_gpios); i++) {
		struct tx51_fec_gpio_setup *gs = &tx51_fec_gpios[i];

		gpio_direction_output(IMX_GPIO_NR(gs->group, gs->shift ), gs->level);
		mxc_iomux_v3_setup_pad(gs->pad);
	}

	/*
	 *Turn on phy power, leave in reset state
	 */
	gpio_set_value(TX51_FEC_PHY_PWR, 1);

	/*
	 * Wait some time to let the phy activate the internal regulator
	 */
	mdelay(10);

	/*
	 * Deassert reset, phy latches the rest of bootstrap pins
	 */
	gpio_set_value(TX51_FEC_PHY_RST, 1);

	/* LAN7800 has an internal Power On Reset (POR) signal (OR'ed with
	 * the external RESET signal) which is deactivated 21ms after
	 * power on and latches the strap options.
	 * Delay for 22ms to ensure, that the internal POR is inactive
	 * before reconfiguring the strap pins.
	 */
	mdelay(22);

	/*
	 * The phy is ready, now configure imx51 pads for fec operation
	 */
	mxc_iomux_v3_setup_multiple_pads(tx51_fec_pads,
			ARRAY_SIZE(tx51_fec_pads));
}

static int imx51_babbage_xload_init_devices(void)
{
	static int spi0_chipselects[] = {
		IMX_GPIO_NR(4, 25),
	};

	static struct spi_imx_master spi0_pdata = {
		.chipselect = spi0_chipselects,
		.num_chipselect = ARRAY_SIZE(spi0_chipselects),
	};

	static const struct spi_board_info spi0_devices[] = {
		{
			.name		= "mtd_dataflash",
			.chip_select	= 0,
			.max_speed_hz	= 25 * 1000 * 1000,
			.bus_num	= 0,
		},
	};

static void setup_spi(void)
{
#ifdef CONFIG_TARGET_ZC5202
	gpio_request(IMX_GPIO_NR(5, 17), "spi_cs0");
	gpio_request(IMX_GPIO_NR(5, 9), "spi_cs1");
	gpio_direction_output(IMX_GPIO_NR(5, 17), 1);
	gpio_direction_output(IMX_GPIO_NR(5, 9), 1);
	imx_iomux_v3_setup_multiple_pads(ecspi1_pads, ARRAY_SIZE(ecspi1_pads));
#endif

	gpio_request(IMX_GPIO_NR(3, 20), "spi4_cs0");
	gpio_direction_output(IMX_GPIO_NR(3, 20), 1);
	imx_iomux_v3_setup_multiple_pads(ecspi4_pads, ARRAY_SIZE(ecspi4_pads));

	enable_spi_clk(true, 3);
}