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slimbus: core: add support to device tree helper 

This patch adds support to parse slim devices from device tree.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviwed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Srinivas Kandagatla 2017-12-11 23:42:59 +00:00 committed by Greg Kroah-Hartman
parent 46a2bb5a7f
commit 7588a511bd
1 changed files with 50 additions and 0 deletions
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50
drivers/slimbus/core.c
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@ -8,6 +8,7 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/idr.h>
#include <linux/of.h>
#include <linux/slimbus.h>
#include "slimbus.h"
@ -113,6 +114,9 @@ static int slim_add_device(struct slim_controller *ctrl,
sbdev->dev.driver = NULL;
sbdev->ctrl = ctrl;
if (node)
sbdev->dev.of_node = of_node_get(node);
dev_set_name(&sbdev->dev, "%x:%x:%x:%x",
sbdev->e_addr.manf_id,
sbdev->e_addr.prod_code,
@ -143,6 +147,50 @@ static struct slim_device *slim_alloc_device(struct slim_controller *ctrl,
return sbdev;
}
static void of_register_slim_devices(struct slim_controller *ctrl)
{
struct device *dev = ctrl->dev;
struct device_node *node;
if (!ctrl->dev->of_node)
return;
for_each_child_of_node(ctrl->dev->of_node, node) {
struct slim_device *sbdev;
struct slim_eaddr e_addr;
const char *compat = NULL;
int reg[2], ret;
int manf_id, prod_code;
compat = of_get_property(node, "compatible", NULL);
if (!compat)
continue;
ret = sscanf(compat, "slim%x,%x", &manf_id, &prod_code);
if (ret != 2) {
dev_err(dev, "Manf ID & Product code not found %s\n",
compat);
continue;
}
ret = of_property_read_u32_array(node, "reg", reg, 2);
if (ret) {
dev_err(dev, "Device and Instance id not found:%d\n",
ret);
continue;
}
e_addr.dev_index = reg[0];
e_addr.instance = reg[1];
e_addr.manf_id = manf_id;
e_addr.prod_code = prod_code;
sbdev = slim_alloc_device(ctrl, &e_addr, node);
if (!sbdev)
continue;
}
}
/*
* slim_register_controller() - Controller bring-up and registration.
*
@ -174,6 +222,8 @@ int slim_register_controller(struct slim_controller *ctrl)
dev_dbg(ctrl->dev, "Bus [%s] registered:dev:%p\n",
ctrl->name, ctrl->dev);
of_register_slim_devices(ctrl);
return 0;
}
EXPORT_SYMBOL_GPL(slim_register_controller);