Quoting Tony Lindgren <tony@xxxxxxxxxxx>:
* Felipe Balbi <felipe.balbi@xxxxxxxxx> [090514 01:15]:
On Thu, May 14, 2009 at 03:44:14AM +0200, ext Tony Lindgren wrote:
> * Felipe Balbi <felipe.balbi@xxxxxxxxx> [090513 17:33]:
> > On Thu, May 14, 2009 at 01:46:51AM +0200, ext Andrew de Quincey wrote:
> > > Hi, I've just discovered that the patch at:
> > >
> > >
http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git;a=commitdiff;h=3eae3ea7c443fc4330574dffea65b6f2f53a2574
> > >
> > > Breaks the nokia770's framebuffer as it removes the platform data for
> > > the HWA742 LCD controller.
> > >
> > > As the patch says "Patches against the mainline tree are welcome to
> > > add back the missing functionality if needed!", I'm happy to do this.
> > >
> > > However, since I'm fairly new to the linux-omap project, is simply
> > > extracting the removed nokia770 code and generating a patch against
> > > the mainline kernel sufficient? or is there a newer style of some sort
> > > that should be adopted for this?
> >
> > You can start by generating the new patch against mainline and running
> > scripts/checkpatch.pl, then you should probably find out if there are
> > any API changes and stuff like that. Then send the patch to lkml ccing
> > linux-omap and let's see what comments do you get from those guys :-)
>
> Please change the code to pass the struct clock to
drivers/video/omap/hwa742.c
> in hwa742_platform_data. The hw742.c can just do standard
clk_enable/disable
> there. Otherwise we won't be able to get this missing part to the mainline
> kernel.
how about clkdev then ? are we gonna support that for omap1 still ?
Yeah the clkdev is there, but in the case of the LCD the clock can be
any clock, so we cannot set just one "fck" for all the omap1 LCD panels.
In this case the "bclk" is used for the LCD, but "bclk" could be used
for other devices as well, not just LCD.
Hi, is the attached patch the sort of thing you had in mind? This is
against linux-omap-2.6, latest git.
Unfortunately, both mainline linux-2.6 and linux-omap-2.6 gits lock up
on bootup before the LCD is initialised. However, the linux-omap
2.6.29 that is compiled by openembedded still boots ok, and with the
attached patch applied, the LCD works again!
I guess my next task is to figure out why the mainline kernels freeze;
I've seen that before, and it seemed to be something to do with
changes to the mcbsp support.
Reinstate HWA742 platform data for nokia 770 platform.
Signed-off-by: Andrew de Quincey <adq_dvb@xxxxxxxxxxxxx>
diff --git a/arch/arm/mach-omap1/board-nokia770.c b/arch/arm/mach-omap1/board-nokia770.c
index 8780ca6..df5f38b 100644
--- a/arch/arm/mach-omap1/board-nokia770.c
+++ b/arch/arm/mach-omap1/board-nokia770.c
@@ -33,6 +33,7 @@
#include <mach/common.h>
#include <mach/dsp_common.h>
#include <mach/omapfb.h>
+#include <mach/hwa742.h>
#include <mach/lcd_mipid.h>
#include <mach/mmc.h>
#include <mach/usb.h>
@@ -163,6 +164,26 @@ static struct spi_board_info nokia770_spi_board_info[] __initdata = {
},
};
+static struct hwa742_platform_data nokia770_hwa742_platform_data = {
+ .sys_ck = NULL,
+ .te_connected = 1,
+};
+
+static int hwa742_get_clocks(void)
+{
+ nokia770_hwa742_platform_data.sys_ck = clk_get(NULL, "bclk");
+ if (IS_ERR(nokia770_hwa742_platform_data.sys_ck)) {
+ printk(KERN_ERR "can't get HWA742 clock\n");
+ return PTR_ERR(nokia770_hwa742_platform_data.sys_ck);
+ }
+ return 0;
+}
+
+static void hwa742_dev_init(void)
+{
+ hwa742_get_clocks();
+ omapfb_set_ctrl_platform_data(&nokia770_hwa742_platform_data);
+}
/* assume no Mini-AB port */
@@ -371,6 +392,7 @@ static void __init omap_nokia770_init(void)
omap_serial_init();
omap_register_i2c_bus(1, 100, NULL, 0);
omap_dsp_init();
+ hwa742_dev_init();
ads7846_dev_init();
mipid_dev_init();
omap_usb_init(&nokia770_usb_config);
diff --git a/arch/arm/plat-omap/include/mach/hwa742.h b/arch/arm/plat-omap/include/mach/hwa742.h
index 577f492..c00e05d 100644
--- a/arch/arm/plat-omap/include/mach/hwa742.h
+++ b/arch/arm/plat-omap/include/mach/hwa742.h
@@ -2,10 +2,7 @@
#define _HWA742_H
struct hwa742_platform_data {
- void (*power_up)(struct device *dev);
- void (*power_down)(struct device *dev);
- unsigned long (*get_clock_rate)(struct device *dev);
-
+ struct clk *sys_ck;
unsigned te_connected:1;
};
diff --git a/drivers/video/omap/hwa742.c b/drivers/video/omap/hwa742.c
index 8aa6e47..1230476 100644
--- a/drivers/video/omap/hwa742.c
+++ b/drivers/video/omap/hwa742.c
@@ -133,8 +133,7 @@ struct {
struct lcd_ctrl_extif *extif;
struct lcd_ctrl *int_ctrl;
- void (*power_up)(struct device *dev);
- void (*power_down)(struct device *dev);
+ struct clk *sys_ck;
} hwa742;
struct lcd_ctrl hwa742_ctrl;
@@ -915,14 +914,13 @@ static void hwa742_suspend(void)
hwa742_set_update_mode(OMAPFB_UPDATE_DISABLED);
/* Enable sleep mode */
hwa742_write_reg(HWA742_POWER_SAVE, 1 << 1);
- if (hwa742.power_down != NULL)
- hwa742.power_down(hwa742.fbdev->dev);
+ clk_disable(hwa742.sys_ck);
}
static void hwa742_resume(void)
{
- if (hwa742.power_up != NULL)
- hwa742.power_up(hwa742.fbdev->dev);
+ clk_enable(hwa742.sys_ck);
+
/* Disable sleep mode */
hwa742_write_reg(HWA742_POWER_SAVE, 0);
while (1) {
@@ -955,14 +953,13 @@ static int hwa742_init(struct omapfb_device *fbdev, int ext_mode,
omapfb_conf = fbdev->dev->platform_data;
ctrl_conf = omapfb_conf->ctrl_platform_data;
- if (ctrl_conf == NULL || ctrl_conf->get_clock_rate == NULL) {
+ if (ctrl_conf == NULL || ctrl_conf->sys_ck == NULL) {
dev_err(fbdev->dev, "HWA742: missing platform data\n");
r = -ENOENT;
goto err1;
}
- hwa742.power_down = ctrl_conf->power_down;
- hwa742.power_up = ctrl_conf->power_up;
+ hwa742.sys_ck = ctrl_conf->sys_ck;
spin_lock_init(&hwa742.req_lock);
@@ -972,12 +969,11 @@ static int hwa742_init(struct omapfb_device *fbdev, int ext_mode,
if ((r = hwa742.extif->init(fbdev)) < 0)
goto err2;
- ext_clk = ctrl_conf->get_clock_rate(fbdev->dev);
+ ext_clk = clk_get_rate(hwa742.sys_ck);
if ((r = calc_extif_timings(ext_clk, &extif_mem_div)) < 0)
goto err3;
hwa742.extif->set_timings(&hwa742.reg_timings);
- if (hwa742.power_up != NULL)
- hwa742.power_up(fbdev->dev);
+ clk_enable(hwa742.sys_ck);
calc_hwa742_clk_rates(ext_clk, &sys_clk, &pix_clk);
if ((r = calc_extif_timings(sys_clk, &extif_mem_div)) < 0)
@@ -1040,8 +1036,7 @@ static int hwa742_init(struct omapfb_device *fbdev, int ext_mode,
return 0;
err4:
- if (hwa742.power_down != NULL)
- hwa742.power_down(fbdev->dev);
+ clk_disable(hwa742.sys_ck);
err3:
hwa742.extif->cleanup();
err2:
@@ -1055,8 +1050,7 @@ static void hwa742_cleanup(void)
hwa742_set_update_mode(OMAPFB_UPDATE_DISABLED);
hwa742.extif->cleanup();
hwa742.int_ctrl->cleanup();
- if (hwa742.power_down != NULL)
- hwa742.power_down(hwa742.fbdev->dev);
+ clk_disable(hwa742.sys_ck);
}
struct lcd_ctrl hwa742_ctrl = {
