1 files changed, 98 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mach-imx51.c b/arch/arm/mach-imx/mach-imx51.c
new file mode 100644
index 000000000..8b748a185
--- /dev/null
+++ b/arch/arm/mach-imx/mach-imx51.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2011 Linaro Ltd.
+ */
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+
+#include "common.h"
+#include "hardware.h"
+
+static void __init imx51_init_early(void)
+{
+	mxc_set_cpu_type(MXC_CPU_MX51);
+}
+
+/*
+ * The MIPI HSC unit has been removed from the i.MX51 Reference Manual by
+ * the Freescale marketing division. However this did not remove the
+ * hardware from the chip which still needs to be configured for proper
+ * IPU support.
+ */
+#define MX51_MIPI_HSC_BASE 0x83fdc000
+static void __init imx51_ipu_mipi_setup(void)
+{
+	void __iomem *hsc_addr;
+
+	hsc_addr = ioremap(MX51_MIPI_HSC_BASE, SZ_16K);
+	WARN_ON(!hsc_addr);
+
+	/* setup MIPI module to legacy mode */
+	imx_writel(0xf00, hsc_addr);
+
+	/* CSI mode: reserved; DI control mode: legacy (from Freescale BSP) */
+	imx_writel(imx_readl(hsc_addr + 0x800) | 0x30ff, hsc_addr + 0x800);
+
+	iounmap(hsc_addr);
+}
+
+static void __init imx51_m4if_setup(void)
+{
+	void __iomem *m4if_base;
+	struct device_node *np;
+
+	np = of_find_compatible_node(NULL, NULL, "fsl,imx51-m4if");
+	if (!np)
+		return;
+
+	m4if_base = of_iomap(np, 0);
+	of_node_put(np);
+	if (!m4if_base) {
+		pr_err("Unable to map M4IF registers\n");
+		return;
+	}
+
+	/*
+	 * Configure VPU and IPU with higher priorities
+	 * in order to avoid artifacts during video playback
+	 */
+	writel_relaxed(0x00000203, m4if_base + 0x40);
+	writel_relaxed(0x00000000, m4if_base + 0x44);
+	writel_relaxed(0x00120125, m4if_base + 0x9c);
+	writel_relaxed(0x001901A3, m4if_base + 0x48);
+	iounmap(m4if_base);
+}
+
+static void __init imx51_dt_init(void)
+{
+	imx51_ipu_mipi_setup();
+	imx_src_init();
+	imx51_m4if_setup();
+	imx5_pmu_init();
+	imx_aips_allow_unprivileged_access("fsl,imx51-aipstz");
+}
+
+static void __init imx51_init_late(void)
+{
+	mx51_neon_fixup();
+	imx51_pm_init();
+}
+
+static const char * const imx51_dt_board_compat[] __initconst = {
+	"fsl,imx51",
+	NULL
+};
+
+DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
+	.init_early	= imx51_init_early,
+	.init_machine	= imx51_dt_init,
+	.init_late	= imx51_init_late,
+	.dt_compat	= imx51_dt_board_compat,
+MACHINE_END