Merge branch 'akpm'

* akpm: (182 commits)
  fbdev: bf54x-lq043fb: use kzalloc over kmalloc/memset
  fbdev: *bfin*: fix __dev{init,exit} markings
  fbdev: *bfin*: drop unnecessary calls to memset
  fbdev: bfin-t350mcqb-fb: drop unused local variables
  fbdev: blackfin has __raw I/O accessors, so use them in fb.h
  fbdev: s1d13xxxfb: add accelerated bitblt functions
  tcx: use standard fields for framebuffer physical address and length
  fbdev: add support for handoff from firmware to hw framebuffers
  intelfb: fix a bug when changing video timing
  fbdev: use framebuffer_release() for freeing fb_info structures
  radeon: P2G2CLK_ALWAYS_ONb tested twice, should 2nd be P2G2CLK_DAC_ALWAYS_ONb?
  s3c-fb: CPUFREQ frequency scaling support
  s3c-fb: fix resource releasing on error during probing
  carminefb: fix possible access beyond end of carmine_modedb[]
  acornfb: remove fb_mmap function
  mb862xxfb: use CONFIG_OF instead of CONFIG_PPC_OF
  mb862xxfb: restrict compliation of platform driver to PPC
  Samsung SoC Framebuffer driver: add Alpha Channel support
  atmel-lcdc: fix pixclock upper bound detection
  offb: use framebuffer_alloc() to allocate fb_info struct
  ...

Manually fix up conflicts due to kmemcheck in mm/slab.c

1 files changed, 65 insertions, 2 deletions

diff --git a/drivers/video/s3c2410fb.c b/drivers/video/s3c2410fb.c
index b0b4513ba53..7da0027e240 100644
--- a/drivers/video/s3c2410fb.c
+++ b/drivers/video/s3c2410fb.c
@@ -24,6 +24,7 @@
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
+#include <linux/cpufreq.h>
 
 #include <asm/io.h>
 #include <asm/div64.h>
@@ -89,7 +90,7 @@ static void s3c2410fb_set_lcdaddr(struct fb_info *info)
 static unsigned int s3c2410fb_calc_pixclk(struct s3c2410fb_info *fbi,
 					  unsigned long pixclk)
 {
-	unsigned long clk = clk_get_rate(fbi->clk);
+	unsigned long clk = fbi->clk_rate;
 	unsigned long long div;
 
 	/* pixclk is in picoseconds, our clock is in Hz
@@ -758,6 +759,57 @@ static irqreturn_t s3c2410fb_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_CPU_FREQ
+
+static int s3c2410fb_cpufreq_transition(struct notifier_block *nb,
+					unsigned long val, void *data)
+{
+	struct cpufreq_freqs *freqs = data;
+	struct s3c2410fb_info *info;
+	struct fb_info *fbinfo;
+	long delta_f;
+
+	info = container_of(nb, struct s3c2410fb_info, freq_transition);
+	fbinfo = platform_get_drvdata(to_platform_device(info->dev));
+
+	/* work out change, <0 for speed-up */
+	delta_f = info->clk_rate - clk_get_rate(info->clk);
+
+	if ((val == CPUFREQ_POSTCHANGE && delta_f > 0) ||
+	    (val == CPUFREQ_PRECHANGE && delta_f < 0)) {
+		info->clk_rate = clk_get_rate(info->clk);
+		s3c2410fb_activate_var(fbinfo);
+	}
+
+	return 0;
+}
+
+static inline int s3c2410fb_cpufreq_register(struct s3c2410fb_info *info)
+{
+	info->freq_transition.notifier_call = s3c2410fb_cpufreq_transition;
+
+	return cpufreq_register_notifier(&info->freq_transition,
+					 CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+static inline void s3c2410fb_cpufreq_deregister(struct s3c2410fb_info *info)
+{
+	cpufreq_unregister_notifier(&info->freq_transition,
+				    CPUFREQ_TRANSITION_NOTIFIER);
+}
+
+#else
+static inline int s3c2410fb_cpufreq_register(struct s3c2410fb_info *info)
+{
+	return 0;
+}
+
+static inline void s3c2410fb_cpufreq_deregister(struct s3c2410fb_info *info)
+{
+}
+#endif
+
+
 static char driver_name[] = "s3c2410fb";
 
 static int __init s3c24xxfb_probe(struct platform_device *pdev,
@@ -875,6 +927,8 @@ static int __init s3c24xxfb_probe(struct platform_device *pdev,
 
 	msleep(1);
 
+	info->clk_rate = clk_get_rate(info->clk);
+
 	/* find maximum required memory size for display */
 	for (i = 0; i < mach_info->num_displays; i++) {
 		unsigned long smem_len = mach_info->displays[i].xres;
@@ -904,11 +958,17 @@ static int __init s3c24xxfb_probe(struct platform_device *pdev,
 
 	s3c2410fb_check_var(&fbinfo->var, fbinfo);
 
+	ret = s3c2410fb_cpufreq_register(info);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to register cpufreq\n");
+		goto free_video_memory;
+	}
+
 	ret = register_framebuffer(fbinfo);
 	if (ret < 0) {
 		printk(KERN_ERR "Failed to register framebuffer device: %d\n",
 			ret);
-		goto free_video_memory;
+		goto free_cpufreq;
 	}
 
 	/* create device files */
@@ -922,6 +982,8 @@ static int __init s3c24xxfb_probe(struct platform_device *pdev,
 
 	return 0;
 
+ free_cpufreq:
+	s3c2410fb_cpufreq_deregister(info);
 free_video_memory:
 	s3c2410fb_unmap_video_memory(fbinfo);
 release_clock:
@@ -961,6 +1023,7 @@ static int s3c2410fb_remove(struct platform_device *pdev)
 	int irq;
 
 	unregister_framebuffer(fbinfo);
+	s3c2410fb_cpufreq_deregister(info);
 
 	s3c2410fb_lcd_enable(info, 0);
 	msleep(1);