add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/include/linux/amba/bus.h
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@@ -1,3 +1,4 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  *  linux/include/amba/bus.h
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  *
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@@ -6,10 +7,6 @@
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  *  region or that is derived from a PrimeCell.
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  *
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  *  Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
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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 version 2 as
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- * published by the Free Software Foundation.
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  */
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 #ifndef ASMARM_AMBA_H
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 #define ASMARM_AMBA_H
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 #include <linux/err.h>
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 #include <linux/resource.h>
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 #include <linux/regulator/consumer.h>
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+#include <linux/android_kabi.h>
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 #define AMBA_NR_IRQS	9
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 #define AMBA_CID	0xb105f00d
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 #define CORESIGHT_CID	0xb105900d
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+
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+/*
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+ * CoreSight Architecture specification updates the ID specification
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+ * for components on the AMBA bus. (ARM IHI 0029E)
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+ *
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+ * Bits 15:12 of the CID are the device class.
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+ *
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+ * Class 0xF remains for PrimeCell and legacy components. (AMBA_CID above)
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+ * Class 0x9 defines the component as CoreSight (CORESIGHT_CID above)
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+ * Class 0x0, 0x1, 0xB, 0xE define components that do not have driver support
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+ * at present.
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+ * Class 0x2-0x8,0xA and 0xD-0xD are presently reserved.
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+ *
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+ * Remaining CID bits stay as 0xb105-00d
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+ */
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+
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+/**
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+ * Class 0x9 components use additional values to form a Unique Component
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+ * Identifier (UCI), where peripheral ID values are identical for different
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+ * components. Passed to the amba bus code from the component driver via
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+ * the amba_id->data pointer.
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+ * @devarch	: coresight devarch register value
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+ * @devarch_mask: mask bits used for matching. 0 indicates UCI not used.
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+ * @devtype	: coresight device type value
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+ * @data	: additional driver data. As we have usurped the original
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+ *		pointer some devices may still need additional data
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+ */
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+struct amba_cs_uci_id {
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+	unsigned int devarch;
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+	unsigned int devarch_mask;
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+	unsigned int devtype;
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+	void *data;
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+};
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+
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+/* define offsets for registers used by UCI */
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+#define UCI_REG_DEVTYPE_OFFSET	0xFCC
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+#define UCI_REG_DEVARCH_OFFSET	0xFBC
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 struct clk;
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 	struct device		dev;
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 	struct resource		res;
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 	struct clk		*pclk;
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+	struct device_dma_parameters dma_parms;
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 	unsigned int		periphid;
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+	unsigned int		cid;
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+	struct amba_cs_uci_id	uci;
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 	unsigned int		irq[AMBA_NR_IRQS];
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 	char			*driver_override;
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+
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+	ANDROID_KABI_RESERVE(1);
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 };
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 struct amba_driver {
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 	struct device_driver	drv;
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 	int			(*probe)(struct amba_device *, const struct amba_id *);
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-	int			(*remove)(struct amba_device *);
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+	void			(*remove)(struct amba_device *);
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 	void			(*shutdown)(struct amba_device *);
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 	const struct amba_id	*id_table;
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+
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+	ANDROID_KABI_RESERVE(1);
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 };
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 /*