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soc: qcom: smd: Implement id_table driver matching 

Implement a id_table based driver maching mechanism for drivers that
binds to fixed channels and doesn't need any additional configuration,
e.g. IPCRTR and DIAG.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Andy Gross <agross@codeaurora.org>
This commit is contained in:
Bjorn Andersson 2015-08-28 10:39:20 -07:00 committed by Andy Gross
parent f1fed8c054
commit 1a7caca20e
2 changed files with 29 additions and 7 deletions
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25
drivers/soc/qcom/smd.c
View File

@ -727,6 +727,19 @@ static struct qcom_smd_driver *to_smd_driver(struct device *dev)
static int qcom_smd_dev_match(struct device *dev, struct device_driver *drv)
{
struct qcom_smd_device *qsdev = to_smd_device(dev);
struct qcom_smd_driver *qsdrv = container_of(drv, struct qcom_smd_driver, driver);
const struct qcom_smd_id *match = qsdrv->smd_match_table;
const char *name = qsdev->channel->name;
if (match) {
while (match->name[0]) {
if (!strcmp(match->name, name))
return 1;
match++;
}
}
return of_driver_match_device(dev, drv);
}
@ -880,19 +893,17 @@ static int qcom_smd_create_device(struct qcom_smd_channel *channel)
if (channel->qsdev)
return -EEXIST;
node = qcom_smd_match_channel(edge->of_node, channel->name);
if (!node) {
dev_dbg(smd->dev, "no match for '%s'\n", channel->name);
return -ENXIO;
}
dev_dbg(smd->dev, "registering '%s'\n", channel->name);
qsdev = kzalloc(sizeof(*qsdev), GFP_KERNEL);
if (!qsdev)
return -ENOMEM;
dev_set_name(&qsdev->dev, "%s.%s", edge->of_node->name, node->name);
node = qcom_smd_match_channel(edge->of_node, channel->name);
dev_set_name(&qsdev->dev, "%s.%s",
edge->of_node->name,
node ? node->name : channel->name);
qsdev->dev.parent = smd->dev;
qsdev->dev.bus = &qcom_smd_bus;
qsdev->dev.release = qcom_smd_release_device;

11
include/linux/soc/qcom/smd.h
View File

@ -8,6 +8,14 @@ struct qcom_smd;
struct qcom_smd_channel;
struct qcom_smd_lookup;
/**
* struct qcom_smd_id - struct used for matching a smd device
* @name: name of the channel
*/
struct qcom_smd_id {
char name[20];
};
/**
* struct qcom_smd_device - smd device struct
* @dev: the device struct
@ -21,6 +29,7 @@ struct qcom_smd_device {
/**
* struct qcom_smd_driver - smd driver struct
* @driver: underlying device driver
* @smd_match_table: static channel match table
* @probe: invoked when the smd channel is found
* @remove: invoked when the smd channel is closed
* @callback: invoked when an inbound message is received on the channel,
@ -29,6 +38,8 @@ struct qcom_smd_device {
*/
struct qcom_smd_driver {
struct device_driver driver;
const struct qcom_smd_id *smd_match_table;
int (*probe)(struct qcom_smd_device *dev);
void (*remove)(struct qcom_smd_device *dev);
int (*callback)(struct qcom_smd_device *, const void *, size_t);