From 5a2c96a0e5d1dfc13f71b295f07be8a4b7ac8fdb Mon Sep 17 00:00:00 2001
From: Thierry Reding <treding@nvidia.com>
Date: Tue, 9 Dec 2014 22:25:17 -0700
Subject: ARM: tegra: Enable PCIe on Cardhu

The PCIe bus on Cardhu is routed to the dock connector. An ethernet NIC
is available on the dock over the PCIe bus. Enable the PCIe controller
and the network device driver so that the device can boot over the
network.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
---
 board/nvidia/cardhu/cardhu.c | 52 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

(limited to 'board/nvidia')

diff --git a/board/nvidia/cardhu/cardhu.c b/board/nvidia/cardhu/cardhu.c
index 026f45c..95c4ff2 100644
--- a/board/nvidia/cardhu/cardhu.c
+++ b/board/nvidia/cardhu/cardhu.c
@@ -9,8 +9,11 @@
 #include <dm.h>
 #include <asm/arch/pinmux.h>
 #include <asm/arch/gp_padctrl.h>
+#include <asm/arch/gpio.h>
+#include <asm/gpio.h>
 #include "pinmux-config-cardhu.h"
 #include <i2c.h>
+#include <netdev.h>
 
 #define PMU_I2C_ADDRESS		0x2D
 #define MAX_I2C_RETRY		3
@@ -83,3 +86,52 @@ void pin_mux_mmc(void)
 	board_sdmmc_voltage_init();
 }
 #endif	/* MMC */
+
+#ifdef CONFIG_PCI_TEGRA
+int tegra_pcie_board_init(void)
+{
+	struct udevice *dev;
+	u8 addr, data[1];
+	int err;
+
+	err = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, &dev);
+	if (err) {
+		debug("failed to find PMU bus\n");
+		return err;
+	}
+
+	/* TPS659110: LDO1_REG = 1.05V, ACTIVE */
+	data[0] = 0x15;
+	addr = 0x30;
+
+	err = i2c_write(dev, addr, data, 1);
+	if (err) {
+		debug("failed to set VDD supply\n");
+		return err;
+	}
+
+	/* GPIO: PEX = 3.3V */
+	err = gpio_request(GPIO_PL7, "PEX");
+	if (err < 0)
+		return err;
+
+	gpio_direction_output(GPIO_PL7, 1);
+
+	/* TPS659110: LDO2_REG = 1.05V, ACTIVE */
+	data[0] = 0x15;
+	addr = 0x31;
+
+	err = i2c_write(dev, addr, data, 1);
+	if (err) {
+		debug("failed to set AVDD supply\n");
+		return err;
+	}
+
+	return 0;
+}
+
+int board_eth_init(bd_t *bis)
+{
+	return pci_eth_init(bis);
+}
+#endif /* PCI */
-- 
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