[PATCH net v7 1/3] ptp: ocp: convert serial ports to array

[Vadim Fedorenko <vadfed@meta.com>]

Simplify serial port management code by using array of ports and helpers
to get the name of the port. This change is needed to make the next
patch simplier.

Signed-off-by: Vadim Fedorenko <vadfed@meta.com>
---
 drivers/ptp/ptp_ocp.c | 120 ++++++++++++++++++++----------------------
 1 file changed, 57 insertions(+), 63 deletions(-)

diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index ee2ced88ab34..46369de8e30b 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -316,6 +316,15 @@ struct ptp_ocp_serial_port {
 #define OCP_SERIAL_LEN			6
 #define OCP_SMA_NUM			4
 
+enum {
+	PORT_GNSS,
+	PORT_GNSS2,
+	PORT_MAC, /* miniature atomic clock */
+	PORT_NMEA,
+
+	__PORT_COUNT,
+};
+
 struct ptp_ocp {
 	struct pci_dev		*pdev;
 	struct device		dev;
@@ -357,10 +366,7 @@ struct ptp_ocp {
 	struct delayed_work	sync_work;
 	int			id;
 	int			n_irqs;
-	struct ptp_ocp_serial_port	gnss_port;
-	struct ptp_ocp_serial_port	gnss2_port;
-	struct ptp_ocp_serial_port	mac_port;   /* miniature atomic clock */
-	struct ptp_ocp_serial_port	nmea_port;
+	struct ptp_ocp_serial_port	port[__PORT_COUNT];
 	bool			fw_loader;
 	u8			fw_tag;
 	u16			fw_version;
@@ -655,28 +661,28 @@ static struct ocp_resource ocp_fb_resource[] = {
 		},
 	},
 	{
-		OCP_SERIAL_RESOURCE(gnss_port),
+		OCP_SERIAL_RESOURCE(port[PORT_GNSS]),
 		.offset = 0x00160000 + 0x1000, .irq_vec = 3,
 		.extra = &(struct ptp_ocp_serial_port) {
 			.baud = 115200,
 		},
 	},
 	{
-		OCP_SERIAL_RESOURCE(gnss2_port),
+		OCP_SERIAL_RESOURCE(port[PORT_GNSS2]),
 		.offset = 0x00170000 + 0x1000, .irq_vec = 4,
 		.extra = &(struct ptp_ocp_serial_port) {
 			.baud = 115200,
 		},
 	},
 	{
-		OCP_SERIAL_RESOURCE(mac_port),
+		OCP_SERIAL_RESOURCE(port[PORT_MAC]),
 		.offset = 0x00180000 + 0x1000, .irq_vec = 5,
 		.extra = &(struct ptp_ocp_serial_port) {
 			.baud = 57600,
 		},
 	},
 	{
-		OCP_SERIAL_RESOURCE(nmea_port),
+		OCP_SERIAL_RESOURCE(port[PORT_NMEA]),
 		.offset = 0x00190000 + 0x1000, .irq_vec = 10,
 	},
 	{
@@ -740,7 +746,7 @@ static struct ocp_resource ocp_art_resource[] = {
 		.offset = 0x01000000, .size = 0x10000,
 	},
 	{
-		OCP_SERIAL_RESOURCE(gnss_port),
+		OCP_SERIAL_RESOURCE(port[PORT_GNSS]),
 		.offset = 0x00160000 + 0x1000, .irq_vec = 3,
 		.extra = &(struct ptp_ocp_serial_port) {
 			.baud = 115200,
@@ -839,7 +845,7 @@ static struct ocp_resource ocp_art_resource[] = {
 		},
 	},
 	{
-		OCP_SERIAL_RESOURCE(mac_port),
+		OCP_SERIAL_RESOURCE(port[PORT_MAC]),
 		.offset = 0x00190000, .irq_vec = 7,
 		.extra = &(struct ptp_ocp_serial_port) {
 			.baud = 9600,
@@ -950,14 +956,14 @@ static struct ocp_resource ocp_adva_resource[] = {
 		.offset = 0x00220000, .size = 0x1000,
 	},
 	{
-		OCP_SERIAL_RESOURCE(gnss_port),
+		OCP_SERIAL_RESOURCE(port[PORT_GNSS]),
 		.offset = 0x00160000 + 0x1000, .irq_vec = 3,
 		.extra = &(struct ptp_ocp_serial_port) {
 			.baud = 9600,
 		},
 	},
 	{
-		OCP_SERIAL_RESOURCE(mac_port),
+		OCP_SERIAL_RESOURCE(port[PORT_MAC]),
 		.offset = 0x00180000 + 0x1000, .irq_vec = 5,
 		.extra = &(struct ptp_ocp_serial_port) {
 			.baud = 115200,
@@ -1649,6 +1655,15 @@ ptp_ocp_tod_gnss_name(int idx)
 	return gnss_name[idx];
 }
 
+static const char *
+ptp_ocp_tty_port_name(int idx)
+{
+	static const char * const tty_name[] = {
+		"GNSS", "GNSS2", "MAC", "NMEA"
+	};
+	return tty_name[idx];
+}
+
 struct ptp_ocp_nvmem_match_info {
 	struct ptp_ocp *bp;
 	const void * const tag;
@@ -3960,16 +3975,11 @@ ptp_ocp_summary_show(struct seq_file *s, void *data)
 	bp = dev_get_drvdata(dev);
 
 	seq_printf(s, "%7s: /dev/ptp%d\n", "PTP", ptp_clock_index(bp->ptp));
-	if (bp->gnss_port.line != -1)
-		seq_printf(s, "%7s: /dev/ttyS%d\n", "GNSS1",
-			   bp->gnss_port.line);
-	if (bp->gnss2_port.line != -1)
-		seq_printf(s, "%7s: /dev/ttyS%d\n", "GNSS2",
-			   bp->gnss2_port.line);
-	if (bp->mac_port.line != -1)
-		seq_printf(s, "%7s: /dev/ttyS%d\n", "MAC", bp->mac_port.line);
-	if (bp->nmea_port.line != -1)
-		seq_printf(s, "%7s: /dev/ttyS%d\n", "NMEA", bp->nmea_port.line);
+	for (i = 0; i < __PORT_COUNT; i++) {
+		if (bp->port[i].line != -1)
+			seq_printf(s, "%7s: /dev/ttyS%d\n", ptp_ocp_tty_port_name(i),
+				   bp->port[i].line);
+	}
 
 	memset(sma_val, 0xff, sizeof(sma_val));
 	if (bp->sma_map1) {
@@ -4279,7 +4289,7 @@ ptp_ocp_dev_release(struct device *dev)
 static int
 ptp_ocp_device_init(struct ptp_ocp *bp, struct pci_dev *pdev)
 {
-	int err;
+	int i, err;
 
 	mutex_lock(&ptp_ocp_lock);
 	err = idr_alloc(&ptp_ocp_idr, bp, 0, 0, GFP_KERNEL);
@@ -4292,10 +4302,10 @@ ptp_ocp_device_init(struct ptp_ocp *bp, struct pci_dev *pdev)
 
 	bp->ptp_info = ptp_ocp_clock_info;
 	spin_lock_init(&bp->lock);
-	bp->gnss_port.line = -1;
-	bp->gnss2_port.line = -1;
-	bp->mac_port.line = -1;
-	bp->nmea_port.line = -1;
+
+	for (i = 0; i < __PORT_COUNT; i++)
+		bp->port[i].line = -1;
+
 	bp->pdev = pdev;
 
 	device_initialize(&bp->dev);
@@ -4351,23 +4361,15 @@ ptp_ocp_complete(struct ptp_ocp *bp)
 {
 	struct pps_device *pps;
 	char buf[32];
+	int i;
 
-	if (bp->gnss_port.line != -1) {
-		sprintf(buf, "ttyS%d", bp->gnss_port.line);
-		ptp_ocp_link_child(bp, buf, "ttyGNSS");
-	}
-	if (bp->gnss2_port.line != -1) {
-		sprintf(buf, "ttyS%d", bp->gnss2_port.line);
-		ptp_ocp_link_child(bp, buf, "ttyGNSS2");
-	}
-	if (bp->mac_port.line != -1) {
-		sprintf(buf, "ttyS%d", bp->mac_port.line);
-		ptp_ocp_link_child(bp, buf, "ttyMAC");
-	}
-	if (bp->nmea_port.line != -1) {
-		sprintf(buf, "ttyS%d", bp->nmea_port.line);
-		ptp_ocp_link_child(bp, buf, "ttyNMEA");
+	for (i = 0; i < __PORT_COUNT; i++) {
+		if (bp->port[i].line != -1) {
+			sprintf(buf, "ttyS%d", bp->port[i].line);
+			ptp_ocp_link_child(bp, buf, ptp_ocp_tty_port_name(i));
+		}
 	}
+
 	sprintf(buf, "ptp%d", ptp_clock_index(bp->ptp));
 	ptp_ocp_link_child(bp, buf, "ptp");
 
@@ -4416,23 +4418,20 @@ ptp_ocp_info(struct ptp_ocp *bp)
 	};
 	struct device *dev = &bp->pdev->dev;
 	u32 reg;
+	int i;
 
 	ptp_ocp_phc_info(bp);
 
-	ptp_ocp_serial_info(dev, "GNSS", bp->gnss_port.line,
-			    bp->gnss_port.baud);
-	ptp_ocp_serial_info(dev, "GNSS2", bp->gnss2_port.line,
-			    bp->gnss2_port.baud);
-	ptp_ocp_serial_info(dev, "MAC", bp->mac_port.line, bp->mac_port.baud);
-	if (bp->nmea_out && bp->nmea_port.line != -1) {
-		bp->nmea_port.baud = -1;
+	for (i = 0; i < __PORT_COUNT; i++) {
+		if (i == PORT_NMEA && bp->nmea_out && bp->port[PORT_NMEA].line != -1) {
+			bp->port[PORT_NMEA].baud = -1;
 
-		reg = ioread32(&bp->nmea_out->uart_baud);
-		if (reg < ARRAY_SIZE(nmea_baud))
-			bp->nmea_port.baud = nmea_baud[reg];
-
-		ptp_ocp_serial_info(dev, "NMEA", bp->nmea_port.line,
-				    bp->nmea_port.baud);
+			reg = ioread32(&bp->nmea_out->uart_baud);
+			if (reg < ARRAY_SIZE(nmea_baud))
+				bp->port[PORT_NMEA].baud = nmea_baud[reg];
+		}
+		ptp_ocp_serial_info(dev, ptp_ocp_tty_port_name(i), bp->port[i].line,
+				    bp->port[i].baud);
 	}
 }
 
@@ -4473,14 +4472,9 @@ ptp_ocp_detach(struct ptp_ocp *bp)
 	for (i = 0; i < 4; i++)
 		if (bp->signal_out[i])
 			ptp_ocp_unregister_ext(bp->signal_out[i]);
-	if (bp->gnss_port.line != -1)
-		serial8250_unregister_port(bp->gnss_port.line);
-	if (bp->gnss2_port.line != -1)
-		serial8250_unregister_port(bp->gnss2_port.line);
-	if (bp->mac_port.line != -1)
-		serial8250_unregister_port(bp->mac_port.line);
-	if (bp->nmea_port.line != -1)
-		serial8250_unregister_port(bp->nmea_port.line);
+	for (i = 0; i < __PORT_COUNT; i++)
+		if (bp->port[i].line != -1)
+			serial8250_unregister_port(bp->port[i].line);
 	platform_device_unregister(bp->spi_flash);
 	platform_device_unregister(bp->i2c_ctrl);
 	if (bp->i2c_clk)
-- 
2.43.5