Platform data support is retained.
of_property_read_u64_array() isn't used yet as it's not in yet.
Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
---
since v2:
- Don't use of_property_read_u64_array() yet.
drivers/media/i2c/smiapp/smiapp-core.c | 114 +++++++++++++++++++++++++++++++-
1 file changed, 112 insertions(+), 2 deletions(-)
diff --git a/drivers/media/i2c/smiapp/smiapp-core.c
b/drivers/media/i2c/smiapp/smiapp-core.c
index b02fa64..465c42f 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -25,11 +25,13 @@
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/module.h>
+#include <linux/of_gpio.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/smiapp.h>
#include <linux/v4l2-mediabus.h>
#include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
#include "smiapp.h"
@@ -2921,19 +2923,121 @@ static int smiapp_resume(struct device *dev)
#endif /* CONFIG_PM */
+static struct smiapp_platform_data *smiapp_get_pdata(struct device *dev)
+{
+ struct smiapp_platform_data *pdata;
+ struct v4l2_of_endpoint bus_cfg;
+ struct device_node *ep;
+ struct property *prop;
+ __be32 *val;
+ uint32_t asize;
+ unsigned int i;
+ int rval;
+
+ if (!dev->of_node)
+ return dev->platform_data;
+
+ ep = of_graph_get_next_endpoint(dev->of_node, NULL);
+ if (!ep)
+ return NULL;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ rval = -ENOMEM;
+ goto out_err;
+ }
+
+ v4l2_of_parse_endpoint(ep, &bus_cfg);
+
+ switch (bus_cfg.bus_type) {
+ case V4L2_MBUS_CSI2:
+ pdata->csi_signalling_mode = SMIAPP_CSI_SIGNALLING_MODE_CSI2;
+ break;
+ /* FIXME: add CCP2 support. */
+ default:
+ rval = -EINVAL;
+ goto out_err;
+ }
+
+ pdata->lanes = bus_cfg.bus.mipi_csi2.num_data_lanes;
+ dev_dbg(dev, "lanes %u\n", pdata->lanes);
+
+ /* xshutdown GPIO is optional */
+ pdata->xshutdown = of_get_named_gpio(dev->of_node, "reset-gpios", 0);
+
+ /* NVM size is not mandatory */
+ of_property_read_u32(dev->of_node, "nokia,nvm-size",
+ &pdata->nvm_size);
+
+ rval = of_property_read_u32(dev->of_node, "clock-frequency",
+ &pdata->ext_clk);
+ if (rval) {
+ dev_warn(dev, "can't get clock-frequency\n");
+ goto out_err;
+ }
+
+ dev_dbg(dev, "reset %d, nvm %d, clk %d, csi %d\n", pdata->xshutdown,
+ pdata->nvm_size, pdata->ext_clk, pdata->csi_signalling_mode);
+
+ rval = of_get_property(
+ dev->of_node, "link-frequency", &asize) ? 0 : -ENOENT;
+ if (rval) {
+ dev_warn(dev, "can't get link-frequency array size\n");
+ goto out_err;
+ }
+
+ pdata->op_sys_clock = devm_kzalloc(dev, asize, GFP_KERNEL);
+ if (!pdata->op_sys_clock) {
+ rval = -ENOMEM;
+ goto out_err;
+ }
+
+ asize /= sizeof(*pdata->op_sys_clock);
+ /*
+ * Read a 64-bit array --- this will be replaced with a
+ * of_property_read_u64_array() once it's merged.
+ */
+ prop = of_find_property(dev->of_node, "link-frequency", NULL);
+ if (!prop)
+ goto out_err;
+ if (!prop->value)
+ goto out_err;
+ if (asize * sizeof(*pdata->op_sys_clock) > prop->length)
+ goto out_err;
+ val = prop->value;
+ if (IS_ERR(val))
+ goto out_err;
+
+ for (i = 0; i < asize; i++)
+ pdata->op_sys_clock[i] = of_read_number(val + i * 2, 2);
+
+ for (; asize > 0; asize--)
+ dev_dbg(dev, "freq %d: %lld\n", asize - 1,
+ pdata->op_sys_clock[asize - 1]);
+
+ of_node_put(ep);
+ return pdata;
+
+out_err:
+ of_node_put(ep);
+ return NULL;
+}
+
static int smiapp_probe(struct i2c_client *client,
const struct i2c_device_id *devid)
{
struct smiapp_sensor *sensor;
+ struct smiapp_platform_data *pdata = smiapp_get_pdata(&client->dev);
+ int rval;
- if (client->dev.platform_data == NULL)
+ if (pdata == NULL)
return -ENODEV;
sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
if (sensor == NULL)
return -ENOMEM;
- sensor->platform_data = client->dev.platform_data;
+ sensor->platform_data = pdata;
mutex_init(&sensor->mutex);
mutex_init(&sensor->power_mutex);
sensor->src = &sensor->ssds[sensor->ssds_used];
@@ -2992,6 +3096,11 @@ static int smiapp_remove(struct i2c_client *client)
return 0;
}
+static const struct of_device_id smiapp_of_table[] = {
+ { .compatible = "nokia,smia" },
+ { },
+};
+
static const struct i2c_device_id smiapp_id_table[] = {
{ SMIAPP_NAME, 0 },
{ },
@@ -3005,6 +3114,7 @@ static const struct dev_pm_ops smiapp_pm_ops = {
static struct i2c_driver smiapp_i2c_driver = {
.driver = {
+ .of_match_table = smiapp_of_table,
.name = SMIAPP_NAME,
.pm = &smiapp_pm_ops,
},
--
1.7.10.4
--
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