Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel

9 files changed, 96 insertions, 71 deletions

diff --git a/arch/arm/common/clkdev.c b/arch/arm/common/clkdev.c
index 1037bba18329..5589444ff437 100644
--- a/arch/arm/common/clkdev.c
+++ b/arch/arm/common/clkdev.c
@@ -62,9 +62,8 @@ static struct clk *clk_find(const char *dev_id, const char *con_id)
         return clk;
 }
 
-struct clk *clk_get(struct device *dev, const char *con_id)
+struct clk *clk_get_sys(const char *dev_id, const char *con_id)
 {
-        const char *dev_id = dev ? dev_name(dev) : NULL;
         struct clk *clk;
 
         mutex_lock(&clocks_mutex);
@@ -75,6 +74,14 @@ struct clk *clk_get(struct device *dev, const char *con_id)
 
         return clk ? clk : ERR_PTR(-ENOENT);
 }
+EXPORT_SYMBOL(clk_get_sys);
+
+struct clk *clk_get(struct device *dev, const char *con_id)
+{
+        const char *dev_id = dev ? dev_name(dev) : NULL;
+
+        return clk_get_sys(dev_id, con_id);
+}
 EXPORT_SYMBOL(clk_get);
 
 void clk_put(struct clk *clk)
diff --git a/arch/arm/mach-imx/generic.c b/arch/arm/mach-imx/generic.c
index 887cb21f75b0..05f1739ee127 100644
--- a/arch/arm/mach-imx/generic.c
+++ b/arch/arm/mach-imx/generic.c
@@ -29,7 +29,6 @@
 #include <linux/string.h>
 
 #include <asm/errno.h>
-#include <mach/imxfb.h>
 #include <mach/hardware.h>
 #include <mach/imx-regs.h>
 
@@ -245,43 +244,8 @@ void __init imx_set_mmc_info(struct imxmmc_platform_data *info)
         imx_mmc_device.dev.platform_data = info;
 }
 
-static struct imx_fb_platform_data imx_fb_info;
-
-void __init set_imx_fb_info(struct imx_fb_platform_data *hard_imx_fb_info)
-{
-        memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imx_fb_platform_data));
-}
-
-static struct resource imxfb_resources[] = {
-        [0] = {
-                .start  = 0x00205000,
-                .end    = 0x002050FF,
-                .flags  = IORESOURCE_MEM,
-        },
-        [1] = {
-                .start  = LCDC_INT,
-                .end    = LCDC_INT,
-                .flags  = IORESOURCE_IRQ,
-        },
-};
-
-static u64 fb_dma_mask = ~(u64)0;
-
-static struct platform_device imxfb_device = {
-        .name           = "imx-fb",
-        .id             = 0,
-        .dev            = {
-                .platform_data  = &imx_fb_info,
-                .dma_mask       = &fb_dma_mask,
-                .coherent_dma_mask = 0xffffffff,
-        },
-        .num_resources  = ARRAY_SIZE(imxfb_resources),
-        .resource       = imxfb_resources,
-};
-
 static struct platform_device *devices[] __initdata = {
         &imx_mmc_device,
-        &imxfb_device,
 };
 
 static struct map_desc imx_io_desc[] __initdata = {
diff --git a/arch/arm/mach-mx2/Makefile b/arch/arm/mach-mx2/Makefile
index 6e1a2bffc812..950649a91540 100644
--- a/arch/arm/mach-mx2/Makefile
+++ b/arch/arm/mach-mx2/Makefile
@@ -4,7 +4,7 @@
 
 # Object file lists.
 
-obj-y   :=  system.o generic.o devices.o serial.o
+obj-y   :=  generic.o devices.o serial.o
 
 obj-$(CONFIG_MACH_MX21) += clock_imx21.o
 
diff --git a/arch/arm/mach-mx2/devices.c b/arch/arm/mach-mx2/devices.c
index f81aa8a8fbb4..a0f1b3674327 100644
--- a/arch/arm/mach-mx2/devices.c
+++ b/arch/arm/mach-mx2/devices.c
@@ -229,7 +229,6 @@ struct platform_device mxc_nand_device = {
         .resource = mxc_nand_resources,
 };
 
-#ifdef CONFIG_FB_IMX
 /*
  * lcdc:
  * - i.MX1: the basic controller
@@ -259,7 +258,6 @@ struct platform_device mxc_fb_device = {
                 .coherent_dma_mask = 0xFFFFFFFF,
         },
 };
-#endif
 
 #ifdef CONFIG_MACH_MX27
 static struct resource mxc_fec_resources[] = {
diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile
index 564fd4ebf38a..055406312b69 100644
--- a/arch/arm/plat-mxc/Makefile
+++ b/arch/arm/plat-mxc/Makefile
@@ -3,7 +3,7 @@
 #
 
 # Common support
-obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o
+obj-y := irq.o clock.o gpio.o time.o devices.o cpu.o system.o
 
 obj-$(CONFIG_ARCH_MX1) += iomux-mx1-mx2.o dma-mx1-mx2.o
 obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o
diff --git a/arch/arm/plat-mxc/include/mach/system.h b/arch/arm/plat-mxc/include/mach/system.h
index cd03ebaa49bc..e56241af870e 100644
--- a/arch/arm/plat-mxc/include/mach/system.h
+++ b/arch/arm/plat-mxc/include/mach/system.h
@@ -26,9 +26,6 @@ static inline void arch_idle(void)
         cpu_do_idle();
 }
 
-static inline void arch_reset(char mode, const char *cmd)
-{
-        cpu_reset(0);
-}
+void arch_reset(char mode, const char *cmd);
 
 #endif /* __ASM_ARCH_MXC_SYSTEM_H__ */
diff --git a/arch/arm/mach-mx2/system.c b/arch/arm/plat-mxc/system.c
index 92c79d4bd162..79c37577c916 100644
--- a/arch/arm/mach-mx2/system.c
+++ b/arch/arm/plat-mxc/system.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2000 Deep Blue Solutions Ltd
  * Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
  * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ * Copyright 2009 Ilya Yanok, Emcraft Systems Ltd, yanok@emcraft.com
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -22,42 +23,45 @@
 #include <linux/kernel.h>
 #include <linux/clk.h>
 #include <linux/io.h>
+#include <linux/err.h>
+#include <linux/delay.h>
 
 #include <mach/hardware.h>
 #include <asm/proc-fns.h>
 #include <asm/system.h>
 
-/*
- * Put the CPU into idle mode. It is called by default_idle()
- * in process.c file.
- */
-void arch_idle(void)
-{
-        /*
-         * This should do all the clock switching
-         * and wait for interrupt tricks.
-         */
-        cpu_do_idle();
-}
-
-#define WDOG_WCR_REG                    IO_ADDRESS(WDOG_BASE_ADDR)
-#define WDOG_WCR_SRS                    (1 << 4)
+#ifdef CONFIG_ARCH_MX1
+#define WDOG_WCR_REG            IO_ADDRESS(WDT_BASE_ADDR)
+#define WDOG_WCR_ENABLE         (1 << 0)
+#else
+#define WDOG_WCR_REG            IO_ADDRESS(WDOG_BASE_ADDR)
+#define WDOG_WCR_ENABLE         (1 << 2)
+#endif
 
 /*
  * Reset the system. It is called by machine_restart().
  */
 void arch_reset(char mode, const char *cmd)
 {
-        struct clk *clk;
+        if (!cpu_is_mx1()) {
+                struct clk *clk;
 
-        clk = clk_get(NULL, "wdog_clk");
-        if (!clk) {
-                printk(KERN_ERR"Cannot activate the watchdog. Giving up\n");
-                return;
+                clk = clk_get_sys("imx-wdt.0", NULL);
+                if (!IS_ERR(clk))
+                        clk_enable(clk);
         }
 
-        clk_enable(clk);
-
         /* Assert SRS signal */
-        __raw_writew(__raw_readw(WDOG_WCR_REG) & ~WDOG_WCR_SRS, WDOG_WCR_REG);
+        __raw_writew(WDOG_WCR_ENABLE, WDOG_WCR_REG);
+
+        /* wait for reset to assert... */
+        mdelay(500);
+
+        printk(KERN_ERR "Watchdog reset failed to assert reset\n");
+
+        /* delay to allow the serial port to show the message */
+        mdelay(50);
+
+        /* we'll take a jump through zero as a poor second */
+        cpu_reset(0);
 }
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index bd1cb75cd14b..15a0ee6d8e23 100644
--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c
@@ -26,9 +26,11 @@
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/cpufreq.h>
+#include <linux/clk.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
+#include <linux/math64.h>
 
 #include <mach/imxfb.h>
 
@@ -141,6 +143,7 @@ struct imxfb_rgb {
 struct imxfb_info {
         struct platform_device  *pdev;
         void __iomem            *regs;
+        struct clk              *clk;
 
         u_int                   max_bpp;
         u_int                   max_xres;
@@ -324,7 +327,7 @@ static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
                 break;
         case 16:
         default:
-                if (readl(fbi->regs + LCDC_PCR) & PCR_TFT)
+                if (fbi->pcr & PCR_TFT)
                         rgb = &def_rgb_16_tft;
                 else
                         rgb = &def_rgb_16_stn;
@@ -403,6 +406,8 @@ static void imxfb_enable_controller(struct imxfb_info *fbi)
 
         writel(RMCR_LCDC_EN, fbi->regs + LCDC_RMCR);
 
+        clk_enable(fbi->clk);
+
         if (fbi->backlight_power)
                 fbi->backlight_power(1);
         if (fbi->lcd_power)
@@ -418,6 +423,8 @@ static void imxfb_disable_controller(struct imxfb_info *fbi)
         if (fbi->lcd_power)
                 fbi->lcd_power(0);
 
+        clk_disable(fbi->clk);
+
         writel(0, fbi->regs + LCDC_RMCR);
 }
 
@@ -461,6 +468,9 @@ static struct fb_ops imxfb_ops = {
 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
 {
         struct imxfb_info *fbi = info->par;
+        unsigned int pcr, lcd_clk;
+        unsigned long long tmp;
+
         pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
                 var->xres, var->hsync_len,
                 var->left_margin, var->right_margin);
@@ -507,7 +517,23 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf
 
         writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
                         fbi->regs + LCDC_SIZE);
-        writel(fbi->pcr, fbi->regs + LCDC_PCR);
+
+        lcd_clk = clk_get_rate(fbi->clk);
+        tmp = var->pixclock * (unsigned long long)lcd_clk;
+        do_div(tmp, 1000000);
+        if (do_div(tmp, 1000000) > 500000)
+                tmp++;
+        pcr = (unsigned int)tmp;
+        if (--pcr > 0x3F) {
+                pcr = 0x3F;
+                printk(KERN_WARNING "Must limit pixel clock to %uHz\n",
+                                lcd_clk / pcr);
+        }
+
+        /* add sync polarities */
+        pcr |= fbi->pcr & ~0x3F;
+
+        writel(pcr, fbi->regs + LCDC_PCR);
         writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
         writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
         writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
@@ -649,6 +675,13 @@ static int __init imxfb_probe(struct platform_device *pdev)
                 goto failed_req;
         }
 
+        fbi->clk = clk_get(&pdev->dev, NULL);
+        if (IS_ERR(fbi->clk)) {
+                ret = PTR_ERR(fbi->clk);;
+                dev_err(&pdev->dev, "unable to get clock: %d\n", ret);
+                goto failed_getclock;
+        }
+
         fbi->regs = ioremap(res->start, resource_size(res));
         if (fbi->regs == NULL) {
                 printk(KERN_ERR"Cannot map frame buffer registers\n");
@@ -717,6 +750,8 @@ failed_platform_init:
                 dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
                         fbi->map_dma);
 failed_map:
+        clk_put(fbi->clk);
+failed_getclock:
         iounmap(fbi->regs);
 failed_ioremap:
         release_mem_region(res->start, res->end - res->start);
@@ -751,6 +786,9 @@ static int __devexit imxfb_remove(struct platform_device *pdev)
 
         iounmap(fbi->regs);
         release_mem_region(res->start, res->end - res->start + 1);
+        clk_disable(fbi->clk);
+        clk_put(fbi->clk);
+
         platform_set_drvdata(pdev, NULL);
 
         return 0;
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 778777316ea4..1db9bbf444a3 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -125,4 +125,21 @@ int clk_set_parent(struct clk *clk, struct clk *parent);
  */
 struct clk *clk_get_parent(struct clk *clk);
 
+/**
+ * clk_get_sys - get a clock based upon the device name
+ * @dev_id: device name
+ * @con_id: connection ID
+ *
+ * Returns a struct clk corresponding to the clock producer, or
+ * valid IS_ERR() condition containing errno.  The implementation
+ * uses @dev_id and @con_id to determine the clock consumer, and
+ * thereby the clock producer. In contrast to clk_get() this function
+ * takes the device name instead of the device itself for identification.
+ *
+ * Drivers must assume that the clock source is not enabled.
+ *
+ * clk_get_sys should not be called from within interrupt context.
+ */
+struct clk *clk_get_sys(const char *dev_id, const char *con_id);
+
 #endif