Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

Pull MIPS updates from Ralf Baechle:
 "This is the main pull request for 3.17.  It contains:

   - misc Cavium Octeon, BCM47xx, BCM63xx and Alchemy  updates
   - MIPS ptrace updates and cleanups
   - various fixes that will also go to -stable
   - a number of cleanups and small non-critical fixes.
   - NUMA support for the Loongson 3.
   - more support for MSA
   - support for MAAR
   - various FP enhancements and fixes"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits)
  MIPS: jz4740: remove unnecessary null test before debugfs_remove
  MIPS: Octeon: remove unnecessary null test before debugfs_remove_recursive
  MIPS: ZBOOT: implement stack protector in compressed boot phase
  MIPS: mipsreg: remove duplicate MIPS_CONF4_FTLBSETS_SHIFT
  MIPS: Bonito64: remove a duplicate define
  MIPS: Malta: initialise MAARs
  MIPS: Initialise MAARs
  MIPS: detect presence of MAARs
  MIPS: define MAAR register accessors & bits
  MIPS: mark MSA experimental
  MIPS: Don't build MSA support unless it can be used
  MIPS: consistently clear MSA flags when starting & copying threads
  MIPS: 16 byte align MSA vector context
  MIPS: disable preemption whilst initialising MSA
  MIPS: ensure MSA gets disabled during boot
  MIPS: fix read_msa_* & write_msa_* functions on non-MSA toolchains
  MIPS: fix MSA context for tasks which don't use FP first
  MIPS: init upper 64b of vector registers when MSA is first used
  MIPS: save/disable MSA in lose_fpu
  MIPS: preserve scalar FP CSR when switching vector context
  ...

3 files changed, 63 insertions, 58 deletions

diff --git a/drivers/video/fbdev/au1100fb.c b/drivers/video/fbdev/au1100fb.c
index 372d4aea9d1c..0676746ec68c 100644
--- a/drivers/video/fbdev/au1100fb.c
+++ b/drivers/video/fbdev/au1100fb.c
@@ -41,6 +41,7 @@
  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
+#include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
@@ -113,7 +114,7 @@ static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 	case VESA_NO_BLANKING:
 		/* Turn on panel */
 		fbdev->regs->lcd_control |= LCD_CONTROL_GO;
-		au_sync();
+		wmb(); /* drain writebuffer */
 		break;
 
 	case VESA_VSYNC_SUSPEND:
@@ -121,7 +122,7 @@ static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
 	case VESA_POWERDOWN:
 		/* Turn off panel */
 		fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
-		au_sync();
+		wmb(); /* drain writebuffer */
 		break;
 	default:
 		break;
@@ -434,7 +435,7 @@ static int au1100fb_drv_probe(struct platform_device *dev)
 	struct au1100fb_device *fbdev = NULL;
 	struct resource *regs_res;
 	unsigned long page;
-	u32 sys_clksrc;
+	struct clk *c;
 
 	/* Allocate new device private */
 	fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
@@ -473,6 +474,13 @@ static int au1100fb_drv_probe(struct platform_device *dev)
 	print_dbg("Register memory map at %p", fbdev->regs);
 	print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
 
+	c = clk_get(NULL, "lcd_intclk");
+	if (!IS_ERR(c)) {
+		fbdev->lcdclk = c;
+		clk_set_rate(c, 48000000);
+		clk_prepare_enable(c);
+	}
+
 	/* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
 	fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
 		  	(fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
@@ -506,10 +514,6 @@ static int au1100fb_drv_probe(struct platform_device *dev)
 	print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
 	print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
 
-	/* Setup LCD clock to AUX (48 MHz) */
-	sys_clksrc = au_readl(SYS_CLKSRC) & ~(SYS_CS_ML_MASK | SYS_CS_DL | SYS_CS_CL);
-	au_writel((sys_clksrc | (1 << SYS_CS_ML_BIT)), SYS_CLKSRC);
-
 	/* load the panel info into the var struct */
 	au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
 	au1100fb_var.xres = fbdev->panel->xres;
@@ -546,6 +550,10 @@ static int au1100fb_drv_probe(struct platform_device *dev)
 	return 0;
 
 failed:
+	if (fbdev->lcdclk) {
+		clk_disable_unprepare(fbdev->lcdclk);
+		clk_put(fbdev->lcdclk);
+	}
 	if (fbdev->fb_mem) {
 		dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
 				     fbdev->fb_phys);
@@ -576,11 +584,15 @@ int au1100fb_drv_remove(struct platform_device *dev)
 
 	fb_dealloc_cmap(&fbdev->info.cmap);
 
+	if (fbdev->lcdclk) {
+		clk_disable_unprepare(fbdev->lcdclk);
+		clk_put(fbdev->lcdclk);
+	}
+
 	return 0;
 }
 
 #ifdef CONFIG_PM
-static u32 sys_clksrc;
 static struct au1100fb_regs fbregs;
 
 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
@@ -590,14 +602,11 @@ int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
 	if (!fbdev)
 		return 0;
 
-	/* Save the clock source state */
-	sys_clksrc = au_readl(SYS_CLKSRC);
-
 	/* Blank the LCD */
 	au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
 
-	/* Stop LCD clocking */
-	au_writel(sys_clksrc & ~SYS_CS_ML_MASK, SYS_CLKSRC);
+	if (fbdev->lcdclk)
+		clk_disable(fbdev->lcdclk);
 
 	memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
 
@@ -613,8 +622,8 @@ int au1100fb_drv_resume(struct platform_device *dev)
 
 	memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
 
-	/* Restart LCD clocking */
-	au_writel(sys_clksrc, SYS_CLKSRC);
+	if (fbdev->lcdclk)
+		clk_enable(fbdev->lcdclk);
 
 	/* Unblank the LCD */
 	au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
diff --git a/drivers/video/fbdev/au1100fb.h b/drivers/video/fbdev/au1100fb.h
index 12d9642d5465..9af19939a9c6 100644
--- a/drivers/video/fbdev/au1100fb.h
+++ b/drivers/video/fbdev/au1100fb.h
@@ -109,6 +109,7 @@ struct au1100fb_device {
 	size_t	      		fb_len;
 	dma_addr_t    		fb_phys;
 	int			panel_idx;
+	struct clk		*lcdclk;
 };
 
 /********************************************************************/
diff --git a/drivers/video/fbdev/au1200fb.c b/drivers/video/fbdev/au1200fb.c
index 4cfba78a1458..40494dbdf519 100644
--- a/drivers/video/fbdev/au1200fb.c
+++ b/drivers/video/fbdev/au1200fb.c
@@ -30,6 +30,7 @@
  *  675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/kernel.h>
@@ -330,9 +331,8 @@ struct panel_settings
 	uint32 mode_pwmhi;
 	uint32 mode_outmask;
 	uint32 mode_fifoctrl;
-	uint32 mode_toyclksrc;
 	uint32 mode_backlight;
-	uint32 mode_auxpll;
+	uint32 lcdclk;
 #define Xres min_xres
 #define Yres min_yres
 	u32	min_xres;		/* Minimum horizontal resolution */
@@ -379,9 +379,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x00000000,
 		.mode_outmask	= 0x00FFFFFF,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 8, /* 96MHz AUXPLL */
+		.lcdclk		= 96,
 		320, 320,
 		240, 240,
 	},
@@ -407,9 +406,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x00000000,
 		.mode_outmask	= 0x00FFFFFF,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 8, /* 96MHz AUXPLL */
+		.lcdclk		= 96,
 		640, 480,
 		640, 480,
 	},
@@ -435,9 +433,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x00000000,
 		.mode_outmask	= 0x00FFFFFF,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 8, /* 96MHz AUXPLL */
+		.lcdclk		= 96,
 		800, 800,
 		600, 600,
 	},
@@ -463,9 +460,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x00000000,
 		.mode_outmask	= 0x00FFFFFF,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 6, /* 72MHz AUXPLL */
+		.lcdclk		= 72,
 		1024, 1024,
 		768, 768,
 	},
@@ -491,9 +487,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x00000000,
 		.mode_outmask	= 0x00FFFFFF,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 10, /* 120MHz AUXPLL */
+		.lcdclk		= 120,
 		1280, 1280,
 		1024, 1024,
 	},
@@ -519,9 +514,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x03400000, /* SCB 0x0 */
 		.mode_outmask	= 0x00FFFFFF,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 8, /* 96MHz AUXPLL */
+		.lcdclk		= 96,
 		1024, 1024,
 		768, 768,
 	},
@@ -550,9 +544,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x03400000,
 		.mode_outmask	= 0x00fcfcfc,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 8, /* 96MHz AUXPLL */
+		.lcdclk		= 96,
 		640, 480,
 		640, 480,
 	},
@@ -581,9 +574,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x03400000,
 		.mode_outmask	= 0x00fcfcfc,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 8, /* 96MHz AUXPLL */
+		.lcdclk		= 96, /* 96MHz AUXPLL */
 		320, 320,
 		240, 240,
 	},
@@ -612,9 +604,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x03400000,
 		.mode_outmask	= 0x00fcfcfc,
 		.mode_fifoctrl	= 0x2f2f2f2f,
-		.mode_toyclksrc	= 0x00000004, /* AUXPLL directly */
 		.mode_backlight	= 0x00000000,
-		.mode_auxpll		= 8, /* 96MHz AUXPLL */
+		.lcdclk		= 96,
 		856, 856,
 		480, 480,
 	},
@@ -646,9 +637,8 @@ static struct panel_settings known_lcd_panels[] =
 		.mode_pwmhi		= 0x00000000,
 		.mode_outmask		= 0x00FFFFFF,
 		.mode_fifoctrl		= 0x2f2f2f2f,
-		.mode_toyclksrc		= 0x00000004, /* AUXPLL directly */
 		.mode_backlight		= 0x00000000,
-		.mode_auxpll		= (48/12) * 2,
+		.lcdclk			= 96,
 		800, 800,
 		480, 480,
 	},
@@ -764,7 +754,7 @@ static int au1200_setlocation (struct au1200fb_device *fbdev, int plane,
 
 	/* Disable the window while making changes, then restore WINEN */
 	winenable = lcd->winenable & (1 << plane);
-	au_sync();
+	wmb(); /* drain writebuffer */
 	lcd->winenable &= ~(1 << plane);
 	lcd->window[plane].winctrl0 = winctrl0;
 	lcd->window[plane].winctrl1 = winctrl1;
@@ -772,7 +762,7 @@ static int au1200_setlocation (struct au1200fb_device *fbdev, int plane,
 	lcd->window[plane].winbuf1 = fbdev->fb_phys;
 	lcd->window[plane].winbufctrl = 0; /* select winbuf0 */
 	lcd->winenable |= winenable;
-	au_sync();
+	wmb(); /* drain writebuffer */
 
 	return 0;
 }
@@ -788,22 +778,21 @@ static void au1200_setpanel(struct panel_settings *newpanel,
 	/* Make sure all windows disabled */
 	winenable = lcd->winenable;
 	lcd->winenable = 0;
-	au_sync();
+	wmb(); /* drain writebuffer */
 	/*
 	 * Ensure everything is disabled before reconfiguring
 	 */
 	if (lcd->screen & LCD_SCREEN_SEN) {
 		/* Wait for vertical sync period */
 		lcd->intstatus = LCD_INT_SS;
-		while ((lcd->intstatus & LCD_INT_SS) == 0) {
-			au_sync();
-		}
+		while ((lcd->intstatus & LCD_INT_SS) == 0)
+			;
 
 		lcd->screen &= ~LCD_SCREEN_SEN;	/*disable the controller*/
 
 		do {
 			lcd->intstatus = lcd->intstatus; /*clear interrupts*/
-			au_sync();
+			wmb(); /* drain writebuffer */
 		/*wait for controller to shut down*/
 		} while ((lcd->intstatus & LCD_INT_SD) == 0);
 
@@ -829,11 +818,17 @@ static void au1200_setpanel(struct panel_settings *newpanel,
 	 */
 	if (!(panel->mode_clkcontrol & LCD_CLKCONTROL_EXT))
 	{
-		uint32 sys_clksrc;
-		au_writel(panel->mode_auxpll, SYS_AUXPLL);
-		sys_clksrc = au_readl(SYS_CLKSRC) & ~0x0000001f;
-		sys_clksrc |= panel->mode_toyclksrc;
-		au_writel(sys_clksrc, SYS_CLKSRC);
+		struct clk *c = clk_get(NULL, "lcd_intclk");
+		long r, pc = panel->lcdclk * 1000000;
+
+		if (!IS_ERR(c)) {
+			r = clk_round_rate(c, pc);
+			if ((pc - r) < (pc / 10)) {	/* 10% slack */
+				clk_set_rate(c, r);
+				clk_prepare_enable(c);
+			}
+			clk_put(c);
+		}
 	}
 
 	/*
@@ -847,7 +842,7 @@ static void au1200_setpanel(struct panel_settings *newpanel,
 	lcd->pwmhi = panel->mode_pwmhi;
 	lcd->outmask = panel->mode_outmask;
 	lcd->fifoctrl = panel->mode_fifoctrl;
-	au_sync();
+	wmb(); /* drain writebuffer */
 
 	/* fixme: Check window settings to make sure still valid
 	 * for new geometry */
@@ -863,7 +858,7 @@ static void au1200_setpanel(struct panel_settings *newpanel,
 	 * Re-enable screen now that it is configured
 	 */
 	lcd->screen |= LCD_SCREEN_SEN;
-	au_sync();
+	wmb(); /* drain writebuffer */
 
 	/* Call init of panel */
 	if (pd->panel_init)
@@ -956,7 +951,7 @@ static void au1200_setmode(struct au1200fb_device *fbdev)
 		| LCD_WINCTRL2_SCY_1
 		) ;
 	lcd->winenable |= win->w[plane].mode_winenable;
-	au_sync();
+	wmb(); /* drain writebuffer */
 }
 
 
@@ -1270,7 +1265,7 @@ static void set_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata)
 
 	if (pdata->flags & SCREEN_MASK)
 		lcd->colorkeymsk = pdata->mask;
-	au_sync();
+	wmb(); /* drain writebuffer */
 }
 
 static void get_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata)
@@ -1288,7 +1283,7 @@ static void get_global(u_int cmd, struct au1200_lcd_global_regs_t *pdata)
 	hi1 = (lcd->pwmhi >> 16) + 1;
 	divider = (lcd->pwmdiv & 0x3FFFF) + 1;
 	pdata->brightness = ((hi1 << 8) / divider) - 1;
-	au_sync();
+	wmb(); /* drain writebuffer */
 }
 
 static void set_window(unsigned int plane,
@@ -1387,7 +1382,7 @@ static void set_window(unsigned int plane,
 		val |= (pdata->enable & 1) << plane;
 		lcd->winenable = val;
 	}
-	au_sync();
+	wmb(); /* drain writebuffer */
 }
 
 static void get_window(unsigned int plane,
@@ -1414,7 +1409,7 @@ static void get_window(unsigned int plane,
 	pdata->ram_array_mode = (lcd->window[plane].winctrl2 & LCD_WINCTRL2_RAM) >> 21;
 
 	pdata->enable = (lcd->winenable >> plane) & 1;
-	au_sync();
+	wmb(); /* drain writebuffer */
 }
 
 static int au1200fb_ioctl(struct fb_info *info, unsigned int cmd,
@@ -1511,7 +1506,7 @@ static irqreturn_t au1200fb_handle_irq(int irq, void* dev_id)
 {
 	/* Nothing to do for now, just clear any pending interrupt */
 	lcd->intstatus = lcd->intstatus;
-	au_sync();
+	wmb(); /* drain writebuffer */
 
 	return IRQ_HANDLED;
 }
@@ -1809,7 +1804,7 @@ static int au1200fb_drv_suspend(struct device *dev)
 	au1200_setpanel(NULL, pd);
 
 	lcd->outmask = 0;
-	au_sync();
+	wmb(); /* drain writebuffer */
 
 	return 0;
 }