add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/video/fbdev/pxafb.c
..
..
@@ -597,7 +597,7 @@
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 	return 0;
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 }
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-static struct fb_ops pxafb_ops = {
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+static const struct fb_ops pxafb_ops = {
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 	.owner		= THIS_MODULE,
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 	.fb_check_var	= pxafb_check_var,
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 	.fb_set_par	= pxafb_set_par,
..
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@@ -865,7 +865,7 @@
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 	return 0;
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 }
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-static struct fb_ops overlay_fb_ops = {
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+static const struct fb_ops overlay_fb_ops = {
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 	.owner			= THIS_MODULE,
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 	.fb_open		= overlayfb_open,
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 	.fb_release		= overlayfb_release,
..
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@@ -1614,7 +1614,7 @@
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 		 */
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 		if (old_state != C_DISABLE_PM)
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 			break;
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-		/* fall through */
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+		fallthrough;
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 	case C_ENABLE:
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 		/*
..
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@@ -1674,24 +1674,6 @@
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 		fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) |
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 				  LCCR3_PixClkDiv(pcd);
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 		set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
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-		break;
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-	}
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-	return 0;
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-}
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-
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-static int
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-pxafb_freq_policy(struct notifier_block *nb, unsigned long val, void *data)
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-{
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-	struct pxafb_info *fbi = TO_INF(nb, freq_policy);
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-	struct fb_var_screeninfo *var = &fbi->fb.var;
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-	struct cpufreq_policy *policy = data;
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-
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-	switch (val) {
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-	case CPUFREQ_ADJUST:
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-		pr_debug("min dma period: %d ps, "
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-			"new clock %d kHz\n", pxafb_display_dma_period(var),
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-			policy->max);
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-		/* TODO: fill in min/max values */
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 		break;
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 	}
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 	return 0;
..
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@@ -2068,7 +2050,7 @@
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 #define pxafb_setup_options()		(0)
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 module_param_string(options, g_options, sizeof(g_options), 0);
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-MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.txt)");
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+MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.rst)");
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 #endif
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 #else
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@@ -2255,7 +2237,6 @@
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 {
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 	struct pxafb_info *fbi;
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 	struct pxafb_mach_info *inf, *pdata;
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-	struct resource *r;
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 	int i, irq, ret;
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 	dev_dbg(&dev->dev, "pxafb_probe\n");
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@@ -2321,17 +2302,10 @@
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 		fbi->lcd_supply = NULL;
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 	}
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-	r = platform_get_resource(dev, IORESOURCE_MEM, 0);
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-	if (r == NULL) {
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-		dev_err(&dev->dev, "no I/O memory resource defined\n");
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-		ret = -ENODEV;
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-		goto failed;
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-	}
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-
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-	fbi->mmio_base = devm_ioremap_resource(&dev->dev, r);
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+	fbi->mmio_base = devm_platform_ioremap_resource(dev, 0);
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 	if (IS_ERR(fbi->mmio_base)) {
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 		dev_err(&dev->dev, "failed to get I/O memory\n");
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-		ret = -EBUSY;
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+		ret = PTR_ERR(fbi->mmio_base);
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 		goto failed;
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 	}
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..
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@@ -2400,11 +2374,8 @@
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 #ifdef CONFIG_CPU_FREQ
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 	fbi->freq_transition.notifier_call = pxafb_freq_transition;
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-	fbi->freq_policy.notifier_call = pxafb_freq_policy;
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 	cpufreq_register_notifier(&fbi->freq_transition,
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 				CPUFREQ_TRANSITION_NOTIFIER);
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-	cpufreq_register_notifier(&fbi->freq_policy,
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-				CPUFREQ_POLICY_NOTIFIER);
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 #endif
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 	/*