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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/powerpc/sysdev/of_rtc.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/sysdev/of_rtc.c')
-rw-r--r--arch/powerpc/sysdev/of_rtc.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/of_rtc.c b/arch/powerpc/sysdev/of_rtc.c
new file mode 100644
index 0000000000..2211937d37
--- /dev/null
+++ b/arch/powerpc/sysdev/of_rtc.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Instantiate mmio-mapped RTC chips based on device tree information
+ *
+ * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <asm/prom.h>
+
+static __initdata struct {
+ const char *compatible;
+ char *plat_name;
+} of_rtc_table[] = {
+ { "ds1743-nvram", "rtc-ds1742" },
+};
+
+void __init of_instantiate_rtc(void)
+{
+ struct device_node *node;
+ int err;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(of_rtc_table); i++) {
+ char *plat_name = of_rtc_table[i].plat_name;
+
+ for_each_compatible_node(node, NULL,
+ of_rtc_table[i].compatible) {
+ struct resource *res;
+
+ res = kmalloc(sizeof(*res), GFP_KERNEL);
+ if (!res) {
+ printk(KERN_ERR "OF RTC: Out of memory "
+ "allocating resource structure for %pOF\n",
+ node);
+ continue;
+ }
+
+ err = of_address_to_resource(node, 0, res);
+ if (err) {
+ printk(KERN_ERR "OF RTC: Error "
+ "translating resources for %pOF\n",
+ node);
+ continue;
+ }
+
+ printk(KERN_INFO "OF_RTC: %pOF is a %s @ 0x%llx-0x%llx\n",
+ node, plat_name,
+ (unsigned long long)res->start,
+ (unsigned long long)res->end);
+ platform_device_register_simple(plat_name, -1, res, 1);
+ }
+ }
+}