ARM: mx6: Add PCIe on SabreSDP

Add support for PCIe on MX6 SabreSDP board and enable the support
in the config file.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Liu Ying <Ying.Liu@freescale.com>

board/freescale/mx6sabresd/mx6sabresd.c

@@ -135,6 +135,16 @@ static void setup_spi(void)
 	imx_iomux_v3_setup_multiple_pads(ecspi1_pads, ARRAY_SIZE(ecspi1_pads));
 }
 
+iomux_v3_cfg_t const pcie_pads[] = {
+	MX6_PAD_EIM_D19__GPIO3_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL),	/* POWER */
+	MX6_PAD_GPIO_17__GPIO7_IO12 | MUX_PAD_CTRL(NO_PAD_CTRL),	/* RESET */
+};
+
+static void setup_pcie(void)
+{
+	imx_iomux_v3_setup_multiple_pads(pcie_pads, ARRAY_SIZE(pcie_pads));
+}
+
 iomux_v3_cfg_t const di0_pads[] = {
 	MX6_PAD_DI0_DISP_CLK__IPU1_DI0_DISP_CLK,	/* DISP0_CLK */
 	MX6_PAD_DI0_PIN2__IPU1_DI0_PIN02,		/* DISP0_HSYNC */
@@ -454,6 +464,7 @@ int overwrite_console(void)
 int board_eth_init(bd_t *bis)
 {
 	setup_iomux_enet();
+	setup_pcie();
 
 	return cpu_eth_init(bis);
 }

include/configs/mx6sabresd.h

@@ -48,4 +48,14 @@
 #define CONFIG_IPUV3_CLK 260000000
 #define CONFIG_IMX_HDMI
 
+#define CONFIG_CMD_PCI
+#ifdef CONFIG_CMD_PCI
+#define CONFIG_PCI
+#define CONFIG_PCI_PNP
+#define CONFIG_PCI_SCAN_SHOW
+#define CONFIG_PCIE_IMX
+#define CONFIG_PCIE_IMX_PERST_GPIO	IMX_GPIO_NR(7, 12)
+#define CONFIG_PCIE_IMX_POWER_GPIO	IMX_GPIO_NR(3, 19)
+#endif
+
 #endif                         /* __MX6QSABRESD_CONFIG_H */