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ARM: OMAP2+: Add minimal 8250 support for GPMC

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Just initialize things using the bootloader timings like
we've been doing for the legacy booting too. It should be
possible to patch in the GPMC timings for the based on the
TL16CP743C/TL16C754C manual at:

http://www.ti.com/lit/ds/slls644g/slls644g.pdf

Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2013-10-11 09:21:26 -07:00
parent 79b39f7918
commit f2bf0e72d0
1 changed files with 38 additions and 0 deletions
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38
arch/arm/mach-omap2/gpmc.c
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@ -1521,6 +1521,42 @@ static int gpmc_probe_generic_child(struct platform_device *pdev,
return ret;
}
/*
* REVISIT: Add timing support from slls644g.pdf
*/
static int gpmc_probe_8250(struct platform_device *pdev,
struct device_node *child)
{
struct resource res;
unsigned long base;
int ret, cs;
if (of_property_read_u32(child, "reg", &cs) < 0) {
dev_err(&pdev->dev, "%s has no 'reg' property\n",
child->full_name);
return -ENODEV;
}
if (of_address_to_resource(child, 0, &res) < 0) {
dev_err(&pdev->dev, "%s has malformed 'reg' property\n",
child->full_name);
return -ENODEV;
}
ret = gpmc_cs_request(cs, resource_size(&res), &base);
if (ret < 0) {
dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs);
return ret;
}
if (of_platform_device_create(child, NULL, &pdev->dev))
return 0;
dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name);
return -ENODEV;
}
static int gpmc_probe_dt(struct platform_device *pdev)
{
int ret;
@ -1564,6 +1600,8 @@ static int gpmc_probe_dt(struct platform_device *pdev)
else if (of_node_cmp(child->name, "ethernet") == 0 ||
of_node_cmp(child->name, "nor") == 0)
ret = gpmc_probe_generic_child(pdev, child);
else if (of_node_cmp(child->name, "8250") == 0)
ret = gpmc_probe_8250(pdev, child);
if (WARN(ret < 0, "%s: probing gpmc child %s failed\n",
__func__, child->full_name))