add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/macintosh/via-pmu.c
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@@ -50,9 +50,9 @@
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 #include <linux/of_address.h>
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 #include <linux/of_irq.h>
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 #include <linux/uaccess.h>
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+#include <linux/pgtable.h>
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 #include <asm/machdep.h>
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 #include <asm/io.h>
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-#include <asm/pgtable.h>
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 #include <asm/sections.h>
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 #include <asm/irq.h>
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 #ifdef CONFIG_PPC_PMAC
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@@ -74,9 +74,6 @@
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 /* Some compile options */
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 #undef DEBUG_SLEEP
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-
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-/* Misc minor number allocated for /dev/pmu */
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-#define PMU_MINOR		154
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 /* How many iterations between battery polls */
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 #define BATTERY_POLLING_COUNT	2
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@@ -212,7 +209,7 @@
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 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
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 static int pmu_battery_proc_show(struct seq_file *m, void *v);
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 static void pmu_pass_intr(unsigned char *data, int len);
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-static const struct file_operations pmu_options_proc_fops;
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+static const struct proc_ops pmu_options_proc_ops;
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 #ifdef CONFIG_ADB
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 const struct adb_driver via_pmu_driver = {
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@@ -318,8 +315,8 @@
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 			PMU_INT_ADB |
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 			PMU_INT_TICK;
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-	if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
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-	    || of_device_is_compatible(vias->parent, "ohare")))
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+	if (of_node_name_eq(vias->parent, "ohare") ||
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+	    of_device_is_compatible(vias->parent, "ohare"))
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 		pmu_kind = PMU_OHARE_BASED;
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 	else if (of_device_is_compatible(vias->parent, "paddington"))
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 		pmu_kind = PMU_PADDINGTON_BASED;
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@@ -573,7 +570,7 @@
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 		proc_pmu_irqstats = proc_create_single("interrupts", 0,
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 				proc_pmu_root, pmu_irqstats_proc_show);
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 		proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
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-						&pmu_options_proc_fops);
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+						&pmu_options_proc_ops);
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 	}
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 	return 0;
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 }
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@@ -974,13 +971,12 @@
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 	return fcount;
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 }
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-static const struct file_operations pmu_options_proc_fops = {
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-	.owner		= THIS_MODULE,
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-	.open		= pmu_options_proc_open,
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-	.read		= seq_read,
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-	.llseek		= seq_lseek,
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-	.release	= single_release,
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-	.write		= pmu_options_proc_write,
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+static const struct proc_ops pmu_options_proc_ops = {
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+	.proc_open	= pmu_options_proc_open,
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+	.proc_read	= seq_read,
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+	.proc_lseek	= seq_lseek,
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+	.proc_release	= single_release,
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+	.proc_write	= pmu_options_proc_write,
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 };
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 #ifdef CONFIG_ADB
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@@ -1464,7 +1460,7 @@
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 		pmu_pass_intr(data, len);
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 		/* len == 6 is probably a bad check. But how do I
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 		 * know what PMU versions send what events here? */
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-		if (len == 6) {
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+		if (IS_ENABLED(CONFIG_ADB_PMU_EVENT) && len == 6) {
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 			via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
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 			via_pmu_event(PMU_EVT_LID, data[1]&1);
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 		}
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@@ -1735,6 +1731,39 @@
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 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
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 	    (on ? PMU_POW_ON : PMU_POW_OFF));
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 	pmu_wait_complete(&req);
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+}
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+
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+/* Offset between Unix time (1970-based) and Mac time (1904-based) */
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+#define RTC_OFFSET	2082844800
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+
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+time64_t pmu_get_time(void)
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+{
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+	struct adb_request req;
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+	u32 now;
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+
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+	if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
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+		return 0;
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+	pmu_wait_complete(&req);
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+	if (req.reply_len != 4)
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+		pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
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+	now = (req.reply[0] << 24) + (req.reply[1] << 16) +
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+	      (req.reply[2] << 8) + req.reply[3];
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+	return (time64_t)now - RTC_OFFSET;
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+}
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+
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+int pmu_set_rtc_time(struct rtc_time *tm)
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+{
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+	u32 now;
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+	struct adb_request req;
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+
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+	now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);
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+	if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
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+	                now >> 24, now >> 16, now >> 8, now) < 0)
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+		return -ENXIO;
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+	pmu_wait_complete(&req);
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+	if (req.reply_len != 0)
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+		pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
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+	return 0;
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 }
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 void
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@@ -2155,8 +2184,6 @@
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 	if (count < 1 || !pp)
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 		return -EINVAL;
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-	if (!access_ok(VERIFY_WRITE, buf, count))
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-		return -EFAULT;
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 	spin_lock_irqsave(&pp->lock, flags);
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 	add_wait_queue(&pp->wait, &wait);