Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=72e3524c0b591c30c3a2e2058dd78327ec99efed
Commit: 72e3524c0b591c30c3a2e2058dd78327ec99efed
Parent: a6dba20c5c7b3a18d69bcbd60a1d2ebc0536f0ce
Author: Russell King <[EMAIL PROTECTED]>
AuthorDate: Mon Aug 20 10:18:42 2007 +0100
Committer: Russell King <[EMAIL PROTECTED]>
CommitDate: Fri Oct 12 21:14:56 2007 +0100
[ARM] pxa: update pxafb to use clk support
Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
drivers/video/pxafb.c | 36 +++++++++++++++++++++++-------------
drivers/video/pxafb.h | 1 +
2 files changed, 24 insertions(+), 13 deletions(-)
diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c
index a280a52..f9b12ab 100644
--- a/drivers/video/pxafb.c
+++ b/drivers/video/pxafb.c
@@ -37,6 +37,8 @@
#include <linux/cpufreq.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+#include <linux/err.h>
#include <asm/hardware.h>
#include <asm/io.h>
@@ -506,15 +508,15 @@ static struct fb_ops pxafb_ops = {
*
* Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used
below.
*/
-static inline unsigned int get_pcd(unsigned int pixclock)
+static inline unsigned int get_pcd(struct pxafb_info *fbi, unsigned int
pixclock)
{
unsigned long long pcd;
/* FIXME: Need to take into account Double Pixel Clock mode
- * (DPC) bit? or perhaps set it based on the various clock
- * speeds */
-
- pcd = (unsigned long long)get_lcdclk_frequency_10khz() * pixclock;
+ * (DPC) bit? or perhaps set it based on the various clock
+ * speeds */
+ pcd = (unsigned long long)(clk_get_rate(fbi->clk) / 10000);
+ pcd *= pixclock;
do_div(pcd, 100000000 * 2);
/* no need for this, since we should subtract 1 anyway. they cancel */
/* pcd += 1; */ /* make up for integer math truncations */
@@ -523,19 +525,21 @@ static inline unsigned int get_pcd(unsigned int pixclock)
/*
* Some touchscreens need hsync information from the video driver to
- * function correctly. We export it here.
+ * function correctly. We export it here. Note that 'hsync_time' and
+ * the value returned from pxafb_get_hsync_time() is the *reciprocal*
+ * of the hsync period in seconds.
*/
static inline void set_hsync_time(struct pxafb_info *fbi, unsigned int pcd)
{
- unsigned long long htime;
+ unsigned long htime;
if ((pcd == 0) || (fbi->fb.var.hsync_len == 0)) {
fbi->hsync_time=0;
return;
}
- htime = (unsigned long long)get_lcdclk_frequency_10khz() * 10000;
- do_div(htime, pcd * fbi->fb.var.hsync_len);
+ htime = clk_get_rate(fbi->clk) / (pcd * fbi->fb.var.hsync_len);
+
fbi->hsync_time = htime;
}
@@ -560,7 +564,7 @@ static int pxafb_activate_var(struct fb_var_screeninfo
*var, struct pxafb_info *
{
struct pxafb_lcd_reg new_regs;
u_long flags;
- u_int lines_per_panel, pcd = get_pcd(var->pixclock);
+ u_int lines_per_panel, pcd = get_pcd(fbi, var->pixclock);
pr_debug("pxafb: Configuring PXA LCD\n");
@@ -803,7 +807,7 @@ static void pxafb_enable_controller(struct pxafb_info *fbi)
pr_debug("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3);
/* enable LCD controller clock */
- pxa_set_cken(CKEN_LCD, 1);
+ clk_enable(fbi->clk);
/* Sequence from 11.7.10 */
LCCR3 = fbi->reg_lccr3;
@@ -840,7 +844,7 @@ static void pxafb_disable_controller(struct pxafb_info *fbi)
remove_wait_queue(&fbi->ctrlr_wait, &wait);
/* disable LCD controller clock */
- pxa_set_cken(CKEN_LCD, 0);
+ clk_disable(fbi->clk);
}
/*
@@ -994,7 +998,7 @@ pxafb_freq_transition(struct notifier_block *nb, unsigned
long val, void *data)
break;
case CPUFREQ_POSTCHANGE:
- pcd = get_pcd(fbi->fb.var.pixclock);
+ pcd = get_pcd(fbi, fbi->fb.var.pixclock);
set_hsync_time(fbi, pcd);
fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) |
LCCR3_PixClkDiv(pcd);
set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE);
@@ -1119,6 +1123,12 @@ static struct pxafb_info * __init
pxafb_init_fbinfo(struct device *dev)
memset(fbi, 0, sizeof(struct pxafb_info));
fbi->dev = dev;
+ fbi->clk = clk_get(dev, "LCDCLK");
+ if (IS_ERR(fbi->clk)) {
+ kfree(fbi);
+ return NULL;
+ }
+
strcpy(fbi->fb.fix.id, PXA_NAME);
fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS;
diff --git a/drivers/video/pxafb.h b/drivers/video/pxafb.h
index 7499a1c..f8605b8 100644
--- a/drivers/video/pxafb.h
+++ b/drivers/video/pxafb.h
@@ -40,6 +40,7 @@ struct pxafb_dma_descriptor {
struct pxafb_info {
struct fb_info fb;
struct device *dev;
+ struct clk *clk;
/*
* These are the addresses we mapped
-
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