1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/boards/zii-imx7d-dev/lowlevel.c b/arch/arm/boards/zii-imx7d-dev/lowlevel.c
new file mode 100644
index 0000000000..d7f8feb951
--- /dev/null
+++ b/arch/arm/boards/zii-imx7d-dev/lowlevel.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Copyright (C) 2018 Zodiac Inflight Innovation
+ * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
+ */
+
+#include <debug_ll.h>
+#include <io.h>
+#include <common.h>
+#include <linux/sizes.h>
+#include <mach/generic.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <mach/imx7-ccm-regs.h>
+#include <mach/iomux-mx7.h>
+#include <mach/debug_ll.h>
+#include <asm/cache.h>
+#include <mach/esdctl.h>
+
+extern char __dtb_imx7d_zii_rpu2_start[];
+
+static inline void setup_uart(void)
+{
+	void __iomem *iomux = IOMEM(MX7_IOMUXC_BASE_ADDR);
+	void __iomem *ccm   = IOMEM(MX7_CCM_BASE_ADDR);
+
+	writel(CCM_CCGR_SETTINGn_NEEDED(0),
+	       ccm + CCM_CCGRn_CLR(CCM_CCGR_UART2));
+	writel(CCM_TARGET_ROOTn_ENABLE | UART2_CLK_ROOT__OSC_24M,
+	       ccm + CCM_TARGET_ROOTn(UART2_CLK_ROOT));
+	writel(CCM_CCGR_SETTINGn_NEEDED(0),
+	       ccm + CCM_CCGRn_SET(CCM_CCGR_UART2));
+
+	mx7_setup_pad(iomux, MX7D_PAD_UART2_TX_DATA__UART2_DCE_TX);
+
+	imx7_uart_setup_ll();
+
+	putc_ll('>');
+}
+
+ENTRY_FUNCTION(start_zii_imx7d_dev, r0, r1, r2)
+{
+	imx7_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	imx7d_barebox_entry(__dtb_imx7d_zii_rpu2_start + get_runtime_offset());
+}