NFC: nfcmrvl: Add setup handler

Marvell nfc device provides support for external coexistance
control. It allows Device Host to inhibit the NFCC from polling
when required by asserting a GPIO pin. A second pin allows the
DH to have feedback on the current NFCC state.

The required configuration for this feature is done in setup
handler.
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/nfcmrvl/main.c

@@ -66,10 +66,25 @@ static int nfcmrvl_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
 	return priv->if_ops->nci_send(priv, skb);
 }
 
+static int nfcmrvl_nci_setup(struct nci_dev *ndev)
+{
+	__u8 val;
+
+	val = NFCMRVL_GPIO_PIN_NFC_NOT_ALLOWED;
+	nci_set_config(ndev, NFCMRVL_NOT_ALLOWED_ID, 1, &val);
+	val = NFCMRVL_GPIO_PIN_NFC_ACTIVE;
+	nci_set_config(ndev, NFCMRVL_ACTIVE_ID, 1, &val);
+	val = NFCMRVL_EXT_COEX_ENABLE;
+	nci_set_config(ndev, NFCMRVL_EXT_COEX_ID, 1, &val);
+
+	return 0;
+}
+
 static struct nci_ops nfcmrvl_nci_ops = {
 	.open = nfcmrvl_nci_open,
 	.close = nfcmrvl_nci_close,
 	.send = nfcmrvl_nci_send,
+	.setup = nfcmrvl_nci_setup,
 };
 
 struct nfcmrvl_private *nfcmrvl_nci_register_dev(void *drv_data,

drivers/nfc/nfcmrvl/nfcmrvl.h

@@ -19,6 +19,12 @@
 /* Define private flags: */
 #define NFCMRVL_NCI_RUNNING			1
 
+#define NFCMRVL_EXT_COEX_ID			0xE0
+#define NFCMRVL_NOT_ALLOWED_ID			0xE1
+#define NFCMRVL_ACTIVE_ID			0xE2
+#define NFCMRVL_EXT_COEX_ENABLE			1
+#define NFCMRVL_GPIO_PIN_NFC_NOT_ALLOWED	0xA
+#define NFCMRVL_GPIO_PIN_NFC_ACTIVE		0xB
 #define NFCMRVL_NCI_MAX_EVENT_SIZE		260
 
 struct nfcmrvl_private {