Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

serial: sh-sci: Add OF support

Browse source 
Extend the driver to with support for SCIx device tree bindings. A
minimal set of features is supported, additional properties can be added
later should the need to describe more device features arise.

Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Bastian Hecht 2013-12-06 10:59:54 +01:00 • committed by Simon Horman
parent 334bc11880
commit 20bdcab826
1 changed files with 98 additions and 3 deletions

101
drivers/tty/serial/sh-sci.c
View file

@ -39,6 +39,7 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/notifier.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/scatterlist.h>
@ -2415,6 +2416,83 @@ static int sci_remove(struct platform_device *dev)
return 0;
}
struct sci_port_info {
unsigned int type;
unsigned int regtype;
};
static const struct of_device_id of_sci_match[] = {
{
.compatible = "renesas,scif",
.data = (void *)&(const struct sci_port_info) {
.type = PORT_SCIF,
.regtype = SCIx_SH4_SCIF_REGTYPE,
},
}, {
.compatible = "renesas,scifa",
.data = (void *)&(const struct sci_port_info) {
.type = PORT_SCIFA,
.regtype = SCIx_SCIFA_REGTYPE,
},
}, {
.compatible = "renesas,scifb",
.data = (void *)&(const struct sci_port_info) {
.type = PORT_SCIFB,
.regtype = SCIx_SCIFB_REGTYPE,
},
}, {
.compatible = "renesas,hscif",
.data = (void *)&(const struct sci_port_info) {
.type = PORT_HSCIF,
.regtype = SCIx_HSCIF_REGTYPE,
},
}, {
/* Terminator */
},
};
MODULE_DEVICE_TABLE(of, of_sci_match);
static struct plat_sci_port *
sci_parse_dt(struct platform_device *pdev, unsigned int *dev_id)
{
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *match;
const struct sci_port_info *info;
struct plat_sci_port *p;
int id;
if (!IS_ENABLED(CONFIG_OF) || !np)
return NULL;
match = of_match_node(of_sci_match, pdev->dev.of_node);
if (!match)
return NULL;
info = match->data;
p = devm_kzalloc(&pdev->dev, sizeof(struct plat_sci_port), GFP_KERNEL);
if (!p) {
dev_err(&pdev->dev, "failed to allocate DT config data\n");
return NULL;
}
/* Get the line number for the aliases node. */
id = of_alias_get_id(np, "serial");
if (id < 0) {
dev_err(&pdev->dev, "failed to get alias id (%d)\n", id);
return NULL;
}
*dev_id = id;
p->flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
p->type = info->type;
p->regtype = info->regtype;
p->scscr = SCSCR_RE | SCSCR_TE;
return p;
}
static int sci_probe_single(struct platform_device *dev,
unsigned int index,
struct plat_sci_port *p,
@ -2447,8 +2525,9 @@ static int sci_probe_single(struct platform_device *dev,
static int sci_probe(struct platform_device *dev)
{
struct plat_sci_port *p = dev_get_platdata(&dev->dev);
struct sci_port *sp = &sci_ports[dev->id];
struct plat_sci_port *p;
struct sci_port *sp;
unsigned int dev_id;
int ret;
/*
@ -2459,9 +2538,24 @@ static int sci_probe(struct platform_device *dev)
if (is_early_platform_device(dev))
return sci_probe_earlyprintk(dev);
if (dev->dev.of_node) {
p = sci_parse_dt(dev, &dev_id);
if (p == NULL)
return -EINVAL;
} else {
p = dev->dev.platform_data;
if (p == NULL) {
dev_err(&dev->dev, "no platform data supplied\n");
return -EINVAL;
}
dev_id = dev->id;
}
sp = &sci_ports[dev_id];
platform_set_drvdata(dev, sp);
ret = sci_probe_single(dev, dev->id, p, sp);
ret = sci_probe_single(dev, dev_id, p, sp);
if (ret)
return ret;
@ -2513,6 +2607,7 @@ static struct platform_driver sci_driver = {
.name = "sh-sci",
.owner = THIS_MODULE,
.pm = &sci_dev_pm_ops,
.of_match_table = of_match_ptr(of_sci_match),
},
};