diff mbox series

[RFC,net-next,01/17] net: dsa: microchip: ksz9477: cleanup the ksz9477_switch_detect

Message ID 20220527070358.25490-2-arun.ramadoss@microchip.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net: dsa: microchip: common spi probe for the ksz series switches | expand

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netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 11 of 11 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 75 lines checked
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netdev/source_inline success Was 0 now: 0

Commit Message

Arun Ramadoss May 27, 2022, 7:03 a.m. UTC 
The ksz9477_switch_detect performs the detecting the chip id from the
location 0x00 and also check gigabit compatibility check & number of
ports based on the register global_options0. To prepare the common ksz
switch detect function, routine other than chip id read is moved to
ksz9477_switch_init.

Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
---
 drivers/net/dsa/microchip/ksz9477.c | 48 +++++++++++++----------------
 1 file changed, 22 insertions(+), 26 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index ab40b700cf1a..7afc06681c02 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1362,12 +1362,30 @@  static u32 ksz9477_get_port_addr(int port, int offset)
 
 static int ksz9477_switch_detect(struct ksz_device *dev)
 {
-	u8 data8;
-	u8 id_hi;
-	u8 id_lo;
 	u32 id32;
 	int ret;
 
+	/* read chip id */
+	ret = ksz_read32(dev, REG_CHIP_ID0__1, &id32);
+	if (ret)
+		return ret;
+
+	dev_dbg(dev->dev, "Switch detect: ID=%08x\n", id32);
+
+	dev->chip_id = id32 & 0x00FFFF00;
+
+	return 0;
+}
+
+static int ksz9477_switch_init(struct ksz_device *dev)
+{
+	u8 data8;
+	int ret;
+
+	dev->ds->ops = &ksz9477_switch_ops;
+
+	dev->port_mask = (1 << dev->info->port_cnt) - 1;
+
 	/* turn off SPI DO Edge select */
 	ret = ksz_read8(dev, REG_SW_GLOBAL_SERIAL_CTRL_0, &data8);
 	if (ret)
@@ -1378,10 +1396,6 @@  static int ksz9477_switch_detect(struct ksz_device *dev)
 	if (ret)
 		return ret;
 
-	/* read chip id */
-	ret = ksz_read32(dev, REG_CHIP_ID0__1, &id32);
-	if (ret)
-		return ret;
 	ret = ksz_read8(dev, REG_GLOBAL_OPTIONS, &data8);
 	if (ret)
 		return ret;
@@ -1392,10 +1406,7 @@  static int ksz9477_switch_detect(struct ksz_device *dev)
 	/* Default capability is gigabit capable. */
 	dev->features = GBIT_SUPPORT;
 
-	dev_dbg(dev->dev, "Switch detect: ID=%08x%02x\n", id32, data8);
-	id_hi = (u8)(id32 >> 16);
-	id_lo = (u8)(id32 >> 8);
-	if ((id_lo & 0xf) == 3) {
+	if (dev->chip_id == KSZ9893_CHIP_ID) {
 		/* Chip is from KSZ9893 design. */
 		dev_info(dev->dev, "Found KSZ9893\n");
 		dev->features |= IS_9893;
@@ -1413,21 +1424,6 @@  static int ksz9477_switch_detect(struct ksz_device *dev)
 		if (!(data8 & SW_GIGABIT_ABLE))
 			dev->features &= ~GBIT_SUPPORT;
 	}
-
-	/* Change chip id to known ones so it can be matched against them. */
-	id32 = (id_hi << 16) | (id_lo << 8);
-
-	dev->chip_id = id32;
-
-	return 0;
-}
-
-static int ksz9477_switch_init(struct ksz_device *dev)
-{
-	dev->ds->ops = &ksz9477_switch_ops;
-
-	dev->port_mask = (1 << dev->info->port_cnt) - 1;
-
 	return 0;
 }