[U-Boot] [PATCH] ARM: mx6: Add PCIe on SabreSDP

[Marek Vasut]

Add support for PCIe on MX6 SabreSDP board and enable the support
in the config file.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Fabio Estevam <fabio.estevam at freescale.com>
Cc: Liu Ying <Ying.Liu at freescale.com>
---
 board/freescale/mx6sabresd/mx6sabresd.c | 22 ++++++++++++++++++++++
 include/configs/mx6sabresd.h            |  9 +++++++++
 2 files changed, 31 insertions(+)

NOTE: Please schedule for 2014.07 and please test properly with _AND_ without
      PCIe card.

diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index 12d8c56..8305414 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -135,6 +135,27 @@ static void setup_spi(void)
 	imx_iomux_v3_setup_multiple_pads(ecspi1_pads, ARRAY_SIZE(ecspi1_pads));
 }
 
+#ifdef CONFIG_CMD_PCI
+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));
+
+	/* Power down the PCIe slot */
+	gpio_direction_output(IMX_GPIO_NR(3, 19), 0);
+	mdelay(25);
+	/* Power up the PCIe slot */
+	gpio_set_value(IMX_GPIO_NR(3, 19), 1);
+	mdelay(25);
+}
+#else
+static inline void setup_pcie(void) {}
+#endif
+
 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 +475,7 @@ int overwrite_console(void)
 int board_eth_init(bd_t *bis)
 {
 	setup_iomux_enet();
+	setup_pcie();
 
 	return cpu_eth_init(bis);
 }
diff --git a/include/configs/mx6sabresd.h b/include/configs/mx6sabresd.h
index 4919f53..8b94310 100644
--- a/include/configs/mx6sabresd.h
+++ b/include/configs/mx6sabresd.h
@@ -48,4 +48,13 @@
 #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)
+#endif
+
 #endif                         /* __MX6QSABRESD_CONFIG_H */
-- 
1.9.0