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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/mach-clps711x/board-dt.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-clps711x/board-dt.c')
-rw-r--r--arch/arm/mach-clps711x/board-dt.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/arm/mach-clps711x/board-dt.c b/arch/arm/mach-clps711x/board-dt.c
new file mode 100644
index 000000000..0b22a12e7
--- /dev/null
+++ b/arch/arm/mach-clps711x/board-dt.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Author: Alexander Shiyan <shc_work@mail.ru>, 2016
+ */
+
+#include <linux/io.h>
+#include <linux/of_fdt.h>
+#include <linux/platform_device.h>
+#include <linux/random.h>
+#include <linux/sizes.h>
+
+#include <linux/mfd/syscon/clps711x.h>
+
+#include <asm/system_info.h>
+#include <asm/system_misc.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#define CLPS711X_VIRT_BASE IOMEM(0xfeff4000)
+#define CLPS711X_PHYS_BASE (0x80000000)
+# define SYSFLG1 (0x0140)
+# define HALT (0x0800)
+# define UNIQID (0x2440)
+# define RANDID0 (0x2700)
+# define RANDID1 (0x2704)
+# define RANDID2 (0x2708)
+# define RANDID3 (0x270c)
+
+static struct map_desc clps711x_io_desc __initdata = {
+ .virtual = (unsigned long)CLPS711X_VIRT_BASE,
+ .pfn = __phys_to_pfn(CLPS711X_PHYS_BASE),
+ .length = 48 * SZ_1K,
+ .type = MT_DEVICE,
+};
+
+static void __init clps711x_map_io(void)
+{
+ iotable_init(&clps711x_io_desc, 1);
+}
+
+static const struct resource clps711x_cpuidle_res =
+ DEFINE_RES_MEM(CLPS711X_PHYS_BASE + HALT, SZ_128);
+
+static void __init clps711x_init(void)
+{
+ u32 id[5];
+
+ id[0] = readl(CLPS711X_VIRT_BASE + UNIQID);
+ id[1] = readl(CLPS711X_VIRT_BASE + RANDID0);
+ id[2] = readl(CLPS711X_VIRT_BASE + RANDID1);
+ id[3] = readl(CLPS711X_VIRT_BASE + RANDID2);
+ id[4] = readl(CLPS711X_VIRT_BASE + RANDID3);
+ system_rev = SYSFLG1_VERID(readl(CLPS711X_VIRT_BASE + SYSFLG1));
+
+ add_device_randomness(id, sizeof(id));
+
+ system_serial_low = id[0];
+
+ platform_device_register_simple("clps711x-cpuidle", PLATFORM_DEVID_NONE,
+ &clps711x_cpuidle_res, 1);
+}
+
+static void clps711x_restart(enum reboot_mode mode, const char *cmd)
+{
+ soft_restart(0);
+}
+
+static const char *const clps711x_compat[] __initconst = {
+ "cirrus,ep7209",
+ NULL
+};
+
+DT_MACHINE_START(CLPS711X_DT, "Cirrus Logic CLPS711X (Device Tree Support)")
+ .dt_compat = clps711x_compat,
+ .map_io = clps711x_map_io,
+ .init_late = clps711x_init,
+ .restart = clps711x_restart,
+MACHINE_END