diff mbox series

[net-next,v4,09/17] net: dsa: microchip: add support for regmap_access_tables

Message ID 20220826105634.3855578-10-o.rempel@pengutronix.de (mailing list archive)
State Accepted
Commit ec6ba50c65c1e30218f69055a556bdd133af6da5
Delegated to: Netdev Maintainers
Headers show
Series net: dsa: microchip: add error handling and register access validation | expand

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Context Check Description
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, 100 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Oleksij Rempel Aug. 26, 2022, 10:56 a.m. UTC 
This is complex driver with support for different chips with different
layouts. To detect at least some bugs earlier, we should validate register
accesses by using regmap_access_table support.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
---
 drivers/net/dsa/microchip/ksz_common.h | 46 +++++++++++++++++++++++---
 drivers/net/dsa/microchip/ksz_spi.c    |  3 ++
 2 files changed, 45 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 62b9499afca58..4491cedd32c32 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -62,6 +62,8 @@  struct ksz_chip_data {
 	bool supports_rgmii[KSZ_MAX_NUM_PORTS];
 	bool internal_phy[KSZ_MAX_NUM_PORTS];
 	bool gbit_capable[KSZ_MAX_NUM_PORTS];
+	const struct regmap_access_table *wr_table;
+	const struct regmap_access_table *rd_table;
 };
 
 struct ksz_port {
@@ -333,6 +335,10 @@  static inline int ksz_read8(struct ksz_device *dev, u32 reg, u8 *val)
 	unsigned int value;
 	int ret = regmap_read(dev->regmap[0], reg, &value);
 
+	if (ret)
+		dev_err(dev->dev, "can't read 8bit reg: 0x%x %pe\n", reg,
+			ERR_PTR(ret));
+
 	*val = value;
 	return ret;
 }
@@ -342,6 +348,10 @@  static inline int ksz_read16(struct ksz_device *dev, u32 reg, u16 *val)
 	unsigned int value;
 	int ret = regmap_read(dev->regmap[1], reg, &value);
 
+	if (ret)
+		dev_err(dev->dev, "can't read 16bit reg: 0x%x %pe\n", reg,
+			ERR_PTR(ret));
+
 	*val = value;
 	return ret;
 }
@@ -351,6 +361,10 @@  static inline int ksz_read32(struct ksz_device *dev, u32 reg, u32 *val)
 	unsigned int value;
 	int ret = regmap_read(dev->regmap[2], reg, &value);
 
+	if (ret)
+		dev_err(dev->dev, "can't read 32bit reg: 0x%x %pe\n", reg,
+			ERR_PTR(ret));
+
 	*val = value;
 	return ret;
 }
@@ -361,7 +375,10 @@  static inline int ksz_read64(struct ksz_device *dev, u32 reg, u64 *val)
 	int ret;
 
 	ret = regmap_bulk_read(dev->regmap[2], reg, value, 2);
-	if (!ret)
+	if (ret)
+		dev_err(dev->dev, "can't read 64bit reg: 0x%x %pe\n", reg,
+			ERR_PTR(ret));
+	else
 		*val = (u64)value[0] << 32 | value[1];
 
 	return ret;
@@ -369,17 +386,38 @@  static inline int ksz_read64(struct ksz_device *dev, u32 reg, u64 *val)
 
 static inline int ksz_write8(struct ksz_device *dev, u32 reg, u8 value)
 {
-	return regmap_write(dev->regmap[0], reg, value);
+	int ret;
+
+	ret = regmap_write(dev->regmap[0], reg, value);
+	if (ret)
+		dev_err(dev->dev, "can't write 8bit reg: 0x%x %pe\n", reg,
+			ERR_PTR(ret));
+
+	return ret;
 }
 
 static inline int ksz_write16(struct ksz_device *dev, u32 reg, u16 value)
 {
-	return regmap_write(dev->regmap[1], reg, value);
+	int ret;
+
+	ret = regmap_write(dev->regmap[1], reg, value);
+	if (ret)
+		dev_err(dev->dev, "can't write 16bit reg: 0x%x %pe\n", reg,
+			ERR_PTR(ret));
+
+	return ret;
 }
 
 static inline int ksz_write32(struct ksz_device *dev, u32 reg, u32 value)
 {
-	return regmap_write(dev->regmap[2], reg, value);
+	int ret;
+
+	ret = regmap_write(dev->regmap[2], reg, value);
+	if (ret)
+		dev_err(dev->dev, "can't write 32bit reg: 0x%x %pe\n", reg,
+			ERR_PTR(ret));
+
+	return ret;
 }
 
 static inline int ksz_write64(struct ksz_device *dev, u32 reg, u64 value)
diff --git a/drivers/net/dsa/microchip/ksz_spi.c b/drivers/net/dsa/microchip/ksz_spi.c
index 746b725b09ec4..44c2d99124066 100644
--- a/drivers/net/dsa/microchip/ksz_spi.c
+++ b/drivers/net/dsa/microchip/ksz_spi.c
@@ -66,7 +66,10 @@  static int ksz_spi_probe(struct spi_device *spi)
 	for (i = 0; i < ARRAY_SIZE(ksz8795_regmap_config); i++) {
 		rc = regmap_config[i];
 		rc.lock_arg = &dev->regmap_mutex;
+		rc.wr_table = chip->wr_table;
+		rc.rd_table = chip->rd_table;
 		dev->regmap[i] = devm_regmap_init_spi(spi, &rc);
+
 		if (IS_ERR(dev->regmap[i])) {
 			ret = PTR_ERR(dev->regmap[i]);
 			dev_err(&spi->dev,