add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/spi/spi-s3c24xx.c
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@@ -1,12 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright (c) 2006 Ben Dooks
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  * Copyright 2006-2009 Simtec Electronics
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  *	Ben Dooks <ben@simtec.co.uk>
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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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 */
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 #include <linux/spinlock.h>
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@@ -23,16 +19,15 @@
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 #include <linux/spi/spi.h>
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 #include <linux/spi/spi_bitbang.h>
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 #include <linux/spi/s3c24xx.h>
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+#include <linux/spi/s3c24xx-fiq.h>
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 #include <linux/module.h>
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-
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-#include <plat/regs-spi.h>
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24
 
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 #include <asm/fiq.h>
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-#include "spi-s3c24xx-fiq.h"
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+#include "spi-s3c24xx-regs.h"
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 /**
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- * s3c24xx_spi_devstate - per device data
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+ * struct s3c24xx_spi_devstate - per device data
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  * @hz: Last frequency calculated for @sppre field.
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  * @mode: Last mode setting for the @spcon field.
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  * @spcon: Value to write to the SPCON register.
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@@ -231,23 +226,8 @@
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 struct spi_fiq_code {
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 	u32	length;
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 	u32	ack_offset;
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-	u8	data[0];
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+	u8	data[];
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 };
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-
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-extern struct spi_fiq_code s3c24xx_spi_fiq_txrx;
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-extern struct spi_fiq_code s3c24xx_spi_fiq_tx;
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-extern struct spi_fiq_code s3c24xx_spi_fiq_rx;
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-
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-/**
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- * ack_bit - turn IRQ into IRQ acknowledgement bit
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- * @irq: The interrupt number
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- *
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- * Returns the bit to write to the interrupt acknowledge register.
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- */
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-static inline u32 ack_bit(unsigned int irq)
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-{
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-	return 1 << (irq - IRQ_EINT0);
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-}
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 /**
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  * s3c24xx_spi_tryfiq - attempt to claim and setup FIQ for transfer
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@@ -265,6 +245,7 @@
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 	struct pt_regs regs;
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 	enum spi_fiq_mode mode;
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 	struct spi_fiq_code *code;
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+	u32 *ack_ptr = NULL;
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 	int ret;
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 	if (!hw->fiq_claimed) {
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@@ -287,13 +268,10 @@
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 	regs.uregs[fiq_rrx]  = (long)hw->rx;
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 	regs.uregs[fiq_rtx]  = (long)hw->tx + 1;
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 	regs.uregs[fiq_rcount] = hw->len - 1;
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-	regs.uregs[fiq_rirq] = (long)S3C24XX_VA_IRQ;
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 	set_fiq_regs(&regs);
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 	if (hw->fiq_mode != mode) {
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-		u32 *ack_ptr;
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-
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 		hw->fiq_mode = mode;
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 		switch (mode) {
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@@ -313,12 +291,10 @@
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 		BUG_ON(!code);
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 		ack_ptr = (u32 *)&code->data[code->ack_offset];
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-		*ack_ptr = ack_bit(hw->irq);
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-
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 		set_fiq_handler(&code->data, code->length);
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 	}
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-	s3c24xx_set_fiq(hw->irq, true);
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+	s3c24xx_set_fiq(hw->irq, ack_ptr, true);
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 	hw->fiq_mode = mode;
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 	hw->fiq_inuse = 1;
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@@ -491,7 +467,6 @@
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 	struct s3c2410_spi_info *pdata;
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 	struct s3c24xx_spi *hw;
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 	struct spi_master *master;
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-	struct resource *res;
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 	int err = 0;
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 	master = spi_alloc_master(&pdev->dev, sizeof(struct s3c24xx_spi));
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@@ -540,8 +515,7 @@
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 	dev_dbg(hw->dev, "bitbang at %p\n", &hw->bitbang);
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 	/* find and map our resources */
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	hw->regs = devm_ioremap_resource(&pdev->dev, res);
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+	hw->regs = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(hw->regs)) {
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 		err = PTR_ERR(hw->regs);
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 		goto err_no_pdata;
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@@ -549,7 +523,6 @@
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 	hw->irq = platform_get_irq(pdev, 0);
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 	if (hw->irq < 0) {
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-		dev_err(&pdev->dev, "No IRQ specified\n");
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 		err = -ENOENT;
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 		goto err_no_pdata;
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 	}