add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/video/fbdev/s3c-fb.c
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..
@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /* linux/drivers/video/s3c-fb.c
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  *
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  * Copyright 2008 Openmoko Inc.
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@@ -6,10 +7,6 @@
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  *      http://armlinux.simtec.co.uk/
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  *
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  * Samsung SoC Framebuffer driver
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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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 #include <linux/kernel.h>
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@@ -287,7 +284,7 @@
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 		/* 666 with one bit alpha/transparency */
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 		var->transp.offset	= 18;
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 		var->transp.length	= 1;
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-		/* drop through */
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+		fallthrough;
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 	case 18:
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 		var->bits_per_pixel	= 32;
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..
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@@ -315,7 +312,7 @@
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 	case 25:
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 		var->transp.length	= var->bits_per_pixel - 24;
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 		var->transp.offset	= 24;
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-		/* drop through */
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+		fallthrough;
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 	case 24:
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 		/* our 24bpp is unpacked, so 32bpp */
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 		var->bits_per_pixel	= 32;
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@@ -812,7 +809,7 @@
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 	case FB_BLANK_POWERDOWN:
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 		wincon &= ~WINCONx_ENWIN;
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 		sfb->enabled &= ~(1 << index);
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-		/* fall through to FB_BLANK_NORMAL */
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+		fallthrough;	/* to FB_BLANK_NORMAL */
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 	case FB_BLANK_NORMAL:
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 		/* disable the DMA and display 0x0 (black) */
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@@ -1038,7 +1035,7 @@
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 	return ret;
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 }
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-static struct fb_ops s3c_fb_ops = {
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+static const struct fb_ops s3c_fb_ops = {
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 	.owner		= THIS_MODULE,
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 	.fb_check_var	= s3c_fb_check_var,
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 	.fb_set_par	= s3c_fb_set_par,
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@@ -1105,14 +1102,14 @@
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 	dev_dbg(sfb->dev, "want %u bytes for window\n", size);
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-	fbi->screen_base = dma_alloc_wc(sfb->dev, size, &map_dma, GFP_KERNEL);
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-	if (!fbi->screen_base)
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+	fbi->screen_buffer = dma_alloc_wc(sfb->dev, size, &map_dma, GFP_KERNEL);
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+	if (!fbi->screen_buffer)
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 		return -ENOMEM;
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 	dev_dbg(sfb->dev, "mapped %x to %p\n",
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-		(unsigned int)map_dma, fbi->screen_base);
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+		(unsigned int)map_dma, fbi->screen_buffer);
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1111
 
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-	memset(fbi->screen_base, 0x0, size);
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+	memset(fbi->screen_buffer, 0x0, size);
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 	fbi->fix.smem_start = map_dma;
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 	return 0;
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@@ -1129,9 +1126,9 @@
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 {
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 	struct fb_info *fbi = win->fbinfo;
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-	if (fbi->screen_base)
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+	if (fbi->screen_buffer)
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 		dma_free_wc(sfb->dev, PAGE_ALIGN(fbi->fix.smem_len),
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-		            fbi->screen_base, fbi->fix.smem_start);
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+			    fbi->screen_buffer, fbi->fix.smem_start);
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 }
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 /**
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@@ -1189,10 +1186,8 @@
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 	fbinfo = framebuffer_alloc(sizeof(struct s3c_fb_win) +
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 				   palette_size * sizeof(u32), sfb->dev);
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-	if (!fbinfo) {
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-		dev_err(sfb->dev, "failed to allocate framebuffer\n");
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-		return -ENOENT;
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-	}
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+	if (!fbinfo)
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+		return -ENOMEM;
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 	windata = sfb->pdata->win[win_no];
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 	initmode = *sfb->pdata->vtiming;
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@@ -1416,8 +1411,7 @@
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 	pm_runtime_enable(sfb->dev);
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	sfb->regs = devm_ioremap_resource(dev, res);
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+	sfb->regs = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(sfb->regs)) {
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 		ret = PTR_ERR(sfb->regs);
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 		goto err_lcd_clk;