NFC: nfcmrvl: add platform_data and DT configuration
Declare nfcmrvl platform_data structure and few DT parameters
for nfcmrvl driver.
Signed-off-by: Vincent Cuissard <cuissard@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/nfc/nfcmrvl/main.c b/drivers/nfc/nfcmrvl/main.c
index 708aad2..e317a69a 100644
--- a/drivers/nfc/nfcmrvl/main.c
+++ b/drivers/nfc/nfcmrvl/main.c
@@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/gpio.h>
#include <linux/delay.h>
+#include <linux/of_gpio.h>
#include <linux/nfc.h>
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>
@@ -65,7 +66,7 @@
if (!test_bit(NFCMRVL_NCI_RUNNING, &priv->flags))
return -EBUSY;
- if (priv->hci_muxed) {
+ if (priv->config.hci_muxed) {
unsigned char *hdr;
unsigned char len = skb->len;
@@ -92,9 +93,9 @@
};
struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,
- struct nfcmrvl_if_ops *ops,
- struct device *dev,
- unsigned int flags)
+ struct nfcmrvl_if_ops *ops,
+ struct device *dev,
+ struct nfcmrvl_platform_data *pdata)
{
struct nfcmrvl_private *priv;
int rc;
@@ -108,23 +109,24 @@
priv->drv_data = drv_data;
priv->if_ops = ops;
priv->dev = dev;
- priv->hci_muxed = (flags & NFCMRVL_DEV_FLAG_HCI_MUXED) ? 1 : 0;
- priv->reset_n_io = NFCMRVL_DEV_FLAG_GET_RESET_N_IO(flags);
- if (priv->reset_n_io) {
+ memcpy(&priv->config, pdata, sizeof(*pdata));
+
+ if (priv->config.reset_n_io) {
rc = devm_gpio_request_one(dev,
- priv->reset_n_io,
+ priv->config.reset_n_io,
GPIOF_OUT_INIT_LOW,
"nfcmrvl_reset_n");
if (rc < 0)
nfc_err(dev, "failed to request reset_n io\n");
}
- if (priv->hci_muxed)
+ if (priv->config.hci_muxed)
headroom = NFCMRVL_HCI_EVENT_HEADER_SIZE;
protocols = NFC_PROTO_JEWEL_MASK
- | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
+ | NFC_PROTO_MIFARE_MASK
+ | NFC_PROTO_FELICA_MASK
| NFC_PROTO_ISO14443_MASK
| NFC_PROTO_ISO14443_B_MASK
| NFC_PROTO_NFC_DEP_MASK;
@@ -169,7 +171,7 @@
int nfcmrvl_nci_recv_frame(struct nfcmrvl_private *priv, struct sk_buff *skb)
{
- if (priv->hci_muxed) {
+ if (priv->config.hci_muxed) {
if (skb->data[0] == NFCMRVL_HCI_EVENT_CODE &&
skb->data[1] == NFCMRVL_HCI_NFC_EVENT_CODE) {
/* Data packet, let's extract NCI payload */
@@ -200,15 +202,51 @@
* To be improved.
*/
- if (priv->reset_n_io) {
+ if (priv->config.reset_n_io) {
nfc_info(priv->dev, "reset the chip\n");
- gpio_set_value(priv->reset_n_io, 0);
+ gpio_set_value(priv->config.reset_n_io, 0);
usleep_range(5000, 10000);
- gpio_set_value(priv->reset_n_io, 1);
+ gpio_set_value(priv->config.reset_n_io, 1);
} else
nfc_info(priv->dev, "no reset available on this interface\n");
}
+#ifdef CONFIG_OF
+
+int nfcmrvl_parse_dt(struct device_node *node,
+ struct nfcmrvl_platform_data *pdata)
+{
+ int reset_n_io;
+
+ reset_n_io = of_get_named_gpio(node, "reset-n-io", 0);
+ if (reset_n_io < 0) {
+ pr_info("no reset-n-io config\n");
+ reset_n_io = 0;
+ } else if (!gpio_is_valid(reset_n_io)) {
+ pr_err("invalid reset-n-io GPIO\n");
+ return reset_n_io;
+ }
+ pdata->reset_n_io = reset_n_io;
+
+ if (of_find_property(node, "hci-muxed", NULL))
+ pdata->hci_muxed = 1;
+ else
+ pdata->hci_muxed = 0;
+
+ return 0;
+}
+
+#else
+
+int nfcmrvl_parse_dt(struct device_node *node,
+ struct nfcmrvl_platform_data *pdata)
+{
+ return -ENODEV;
+}
+
+#endif
+EXPORT_SYMBOL_GPL(nfcmrvl_parse_dt);
+
MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell NFC driver ver " VERSION);
MODULE_VERSION(VERSION);
