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video, sm501: add OF binding to support SM501 

- add binding to OF, compatible name "smi,sm501"

Signed-off-by: Heiko Schocher <hs@denx.de>
cc: linux-fbdev@vger.kernel.org
cc: devicetree-discuss@ozlabs.org
cc: Ben Dooks <ben@simtec.co.uk>
cc: Vincent Sanders <vince@simtec.co.uk>
cc: Samuel Ortiz <sameo@linux.intel.com>
cc: linux-kernel@vger.kernel.org
cc: Randy Dunlap <rdunlap@xenotime.net>
cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Heiko Schocher 2011-01-26 07:21:30 +00:00 committed by Paul Mundt
parent e6a0498071
commit 4295f9bf74
3 changed files with 81 additions and 4 deletions
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34
Documentation/powerpc/dts-bindings/sm501.txt Normal file
View File

@ -0,0 +1,34 @@
* SM SM501
The SM SM501 is a LCD controller, with proper hardware, it can also
drive DVI monitors.
Required properties:
- compatible : should be "smi,sm501".
- reg : contain two entries:
- First entry: System Configuration register
- Second entry: IO space (Display Controller register)
- interrupts : SMI interrupt to the cpu should be described here.
- interrupt-parent : the phandle for the interrupt controller that
services interrupts for this device.
Optional properties:
- mode : select a video mode:
<xres>x<yres>[-<bpp>][@<refresh>]
- edid : verbatim EDID data block describing attached display.
Data from the detailed timing descriptor will be used to
program the display controller.
- little-endian: availiable on big endian systems, to
set different foreign endian.
- big-endian: availiable on little endian systems, to
set different foreign endian.
Example for MPC5200:
display@1,0 {
compatible = "smi,sm501";
reg = <1 0x00000000 0x00800000
1 0x03e00000 0x00200000>;
interrupts = <1 1 3>;
mode = "640x480-32@60";
edid = [edid-data];
};

9
drivers/mfd/sm501.c
View File

@ -1377,7 +1377,7 @@ static int __devinit sm501_init_dev(struct sm501_devdata *sm)
sm501_register_gpio(sm);
}
if (pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
if (pdata && pdata->gpio_i2c != NULL && pdata->gpio_i2c_nr > 0) {
if (!sm501_gpio_isregistered(sm))
dev_err(sm->dev, "no gpio available for i2c gpio.\n");
else
@ -1422,6 +1422,7 @@ static int __devinit sm501_plat_probe(struct platform_device *dev)
sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (sm->io_res == NULL || sm->mem_res == NULL) {
dev_err(&dev->dev, "failed to get IO resource\n");
ret = -ENOENT;
@ -1735,10 +1736,16 @@ static struct pci_driver sm501_pci_driver = {
MODULE_ALIAS("platform:sm501");
static struct of_device_id __devinitdata of_sm501_match_tbl[] = {
{ .compatible = "smi,sm501", },
{ /* end */ }
};
static struct platform_driver sm501_plat_driver = {
.driver = {
.name = "sm501",
.owner = THIS_MODULE,
.of_match_table = of_sm501_match_tbl,
},
.probe = sm501_plat_probe,
.remove = sm501_plat_remove,

42
drivers/video/sm501fb.c
View File

@ -1729,6 +1729,15 @@ static int sm501fb_init_fb(struct fb_info *fb,
FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
#if defined(CONFIG_OF)
#ifdef __BIG_ENDIAN
if (of_get_property(info->dev->parent->of_node, "little-endian", NULL))
fb->flags |= FBINFO_FOREIGN_ENDIAN;
#else
if (of_get_property(info->dev->parent->of_node, "big-endian", NULL))
fb->flags |= FBINFO_FOREIGN_ENDIAN;
#endif
#endif
/* fixed data */
fb->fix.type = FB_TYPE_PACKED_PIXELS;
@ -1765,14 +1774,17 @@ static int sm501fb_init_fb(struct fb_info *fb,
fb->var.xres_virtual = fb->var.xres;
fb->var.yres_virtual = fb->var.yres;
} else {
if (info->edid_data)
if (info->edid_data) {
ret = fb_find_mode(&fb->var, fb, fb_mode,
fb->monspecs.modedb,
fb->monspecs.modedb_len,
&sm501_default_mode, default_bpp);
else
/* edid_data is no longer needed, free it */
kfree(info->edid_data);
} else {
ret = fb_find_mode(&fb->var, fb,
NULL, NULL, 0, NULL, 8);
}
switch (ret) {
case 1:
@ -1933,8 +1945,32 @@ static int __devinit sm501fb_probe(struct platform_device *pdev)
}
if (info->pdata == NULL) {
dev_info(dev, "using default configuration data\n");
int found = 0;
#if defined(CONFIG_OF)
struct device_node *np = pdev->dev.parent->of_node;
const u8 *prop;
const char *cp;
int len;
info->pdata = &sm501fb_def_pdata;
if (np) {
/* Get EDID */
cp = of_get_property(np, "mode", &len);
if (cp)
strcpy(fb_mode, cp);
prop = of_get_property(np, "edid", &len);
if (prop && len == EDID_LENGTH) {
info->edid_data = kmemdup(prop, EDID_LENGTH,
GFP_KERNEL);
if (info->edid_data)
found = 1;
}
}
#endif
if (!found) {
dev_info(dev, "using default configuration data\n");
info->pdata = &sm501fb_def_pdata;
}
}
/* probe for the presence of each panel */