add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/clocksource/sh_mtu2.c
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@@ -1,16 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0
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 /*
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  * SuperH Timer Support - MTU2
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  *
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  *  Copyright (C) 2009 Magnus Damm
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  */
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 #include <linux/clk.h>
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@@ -30,6 +22,10 @@
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 #include <linux/sh_timer.h>
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 #include <linux/slab.h>
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 #include <linux/spinlock.h>
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+
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+#ifdef CONFIG_SUPERH
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+#include <asm/platform_early.h>
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+#endif
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 struct sh_mtu2_device;
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@@ -301,12 +297,12 @@
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 static void sh_mtu2_clock_event_suspend(struct clock_event_device *ced)
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 {
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-	pm_genpd_syscore_poweroff(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);
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+	dev_pm_genpd_suspend(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);
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 }
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 static void sh_mtu2_clock_event_resume(struct clock_event_device *ced)
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 {
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-	pm_genpd_syscore_poweron(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);
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+	dev_pm_genpd_resume(&ced_to_sh_mtu2(ced)->mtu->pdev->dev);
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 }
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 static void sh_mtu2_register_clockevent(struct sh_mtu2_channel *ch,
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@@ -336,12 +332,13 @@
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 	return 0;
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 }
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+static const unsigned int sh_mtu2_channel_offsets[] = {
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+	0x300, 0x380, 0x000,
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+};
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+
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 static int sh_mtu2_setup_channel(struct sh_mtu2_channel *ch, unsigned int index,
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 				 struct sh_mtu2_device *mtu)
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 {
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-	static const unsigned int channel_offsets[] = {
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-		0x300, 0x380, 0x000,
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-	};
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 	char name[6];
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 	int irq;
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 	int ret;
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@@ -364,7 +361,7 @@
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 		return ret;
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 	}
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-	ch->base = mtu->mapbase + channel_offsets[index];
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+	ch->base = mtu->mapbase + sh_mtu2_channel_offsets[index];
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 	ch->index = index;
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 	return sh_mtu2_register(ch, dev_name(&mtu->pdev->dev));
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@@ -380,7 +377,7 @@
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 		return -ENXIO;
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 	}
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-	mtu->mapbase = ioremap_nocache(res->start, resource_size(res));
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+	mtu->mapbase = ioremap(res->start, resource_size(res));
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 	if (mtu->mapbase == NULL)
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 		return -ENXIO;
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@@ -416,7 +413,12 @@
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 	}
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 	/* Allocate and setup the channels. */
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-	mtu->num_channels = 3;
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+	ret = platform_irq_count(pdev);
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+	if (ret < 0)
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+		goto err_unmap;
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+
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+	mtu->num_channels = min_t(unsigned int, ret,
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+				  ARRAY_SIZE(sh_mtu2_channel_offsets));
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 	mtu->channels = kcalloc(mtu->num_channels, sizeof(*mtu->channels),
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 				GFP_KERNEL);
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@@ -450,7 +452,7 @@
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 	struct sh_mtu2_device *mtu = platform_get_drvdata(pdev);
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 	int ret;
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-	if (!is_early_platform_device(pdev)) {
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+	if (!is_sh_early_platform_device(pdev)) {
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 		pm_runtime_set_active(&pdev->dev);
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 		pm_runtime_enable(&pdev->dev);
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 	}
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@@ -470,7 +472,7 @@
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 		pm_runtime_idle(&pdev->dev);
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 		return ret;
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 	}
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-	if (is_early_platform_device(pdev))
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+	if (is_sh_early_platform_device(pdev))
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 		return 0;
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477
 
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  out:
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@@ -519,7 +521,10 @@
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 	platform_driver_unregister(&sh_mtu2_device_driver);
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 }
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-early_platform_init("earlytimer", &sh_mtu2_device_driver);
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+#ifdef CONFIG_SUPERH
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+sh_early_platform_init("earlytimer", &sh_mtu2_device_driver);
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+#endif
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+
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 subsys_initcall(sh_mtu2_init);
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 module_exit(sh_mtu2_exit);
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