summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/arm/common/clkdev.c11
-rw-r--r--arch/arm/mach-imx/generic.c36
-rw-r--r--arch/arm/mach-mx2/Makefile2
-rw-r--r--arch/arm/mach-mx2/devices.c2
-rw-r--r--arch/arm/plat-mxc/Makefile2
-rw-r--r--arch/arm/plat-mxc/include/mach/system.h5
-rw-r--r--arch/arm/plat-mxc/system.c (renamed from arch/arm/mach-mx2/system.c)50
-rw-r--r--drivers/video/imxfb.c42
-rw-r--r--include/linux/clk.h17
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
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 11:55:17 +0000