[PATCH 8/8] rockchip: Enable PCIe/M.2 on rock960 board

[Jagan Teki]

Due to some on board limitation rock960 PCIe
works only with 1.8V IO domain.

So, this patch enables grf io_sel explicitly
to make PCIe/M.2 to work.

rock960 => pci
Scanning PCI devices on bus 0
BusDevFun  VendorId   DeviceId   Device Class       Sub-Class
_____________________________________________________________
00.00.00   0x1d87     0x0100     Bridge device           0x04
rock960 => nvme scan
rock960 => nvme dev

IDE device 0: Vendor: 0x144d Rev: 4L1QCXB7 Prod: S35FNX0J623292
            Type: Hard Disk
            Capacity: 122104.3 MB = 119.2 GB (250069680 x 512)

Cc: Tom Cubie <tom at radxa.com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 board/vamrs/rock960_rk3399/rock960-rk3399.c | 20 ++++++++++++++++++++
 configs/rock960-rk3399_defconfig            |  5 +++++
 2 files changed, 25 insertions(+)

diff --git a/board/vamrs/rock960_rk3399/rock960-rk3399.c b/board/vamrs/rock960_rk3399/rock960-rk3399.c
index 68a127b9ac..98d62e89ca 100644
--- a/board/vamrs/rock960_rk3399/rock960-rk3399.c
+++ b/board/vamrs/rock960_rk3399/rock960-rk3399.c
@@ -2,3 +2,23 @@
 /*
  * Copyright (C) 2018 Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
  */
+
+#include <common.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch-rockchip/clock.h>
+#include <asm/arch-rockchip/grf_rk3399.h>
+#include <asm/arch-rockchip/hardware.h>
+
+#ifdef CONFIG_MISC_INIT_R
+int misc_init_r(void)
+{
+	struct rk3399_grf_regs *grf =
+	    syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+
+	/* BT565 is in 1.8v domain */
+	rk_setreg(&grf->io_vsel, BIT(0));
+
+	return 0;
+}
+#endif
diff --git a/configs/rock960-rk3399_defconfig b/configs/rock960-rk3399_defconfig
index c4e954731a..cb1ec3c26b 100644
--- a/configs/rock960-rk3399_defconfig
+++ b/configs/rock960-rk3399_defconfig
@@ -9,6 +9,7 @@ CONFIG_DEBUG_UART_BASE=0xFF1A0000
 CONFIG_DEBUG_UART_CLOCK=24000000
 CONFIG_DEBUG_UART=y
 CONFIG_DEFAULT_FDT_FILE="rockchip/rk3399-rock960.dtb"
+CONFIG_MISC_INIT_R=y
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 # CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
 CONFIG_SPL_STACK_R=y
@@ -19,6 +20,7 @@ CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_USB=y
+CONFIG_CMD_PCI=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_TIME=y
 CONFIG_CMD_PMIC=y
@@ -36,10 +38,13 @@ CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_MMC_SDHCI_ROCKCHIP=y
 CONFIG_DM_ETH=y
+CONFIG_NVME=y
+CONFIG_PCI=y
 CONFIG_PMIC_RK8XX=y
 CONFIG_REGULATOR_PWM=y
 CONFIG_REGULATOR_RK8XX=y
 CONFIG_PWM_ROCKCHIP=y
+CONFIG_DM_RESET=y
 CONFIG_BAUDRATE=1500000
 CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_SYSRESET=y
-- 
2.17.1