[PATCH v4] can: mcp251xfd: replace sizeof(u32) with val_bytes in regmap

[PATCH v4] can: mcp251xfd: replace sizeof(u32) with val_bytes in regmap

[Su Yanjun]

The sizeof(u32) is hardcoded. It's better to use the config value in
regmap.

It increases the size of target object, but it's flexible when new mcp chip
need other val_bytes.

Signed-off-by: Su Yanjun <suyanjun218@gmail.com>
---
 drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
index f07e8b737d31..3dde52669343 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
@@ -1308,6 +1308,7 @@ mcp251xfd_tef_obj_read(const struct mcp251xfd_priv *priv,
 		       const u8 offset, const u8 len)
 {
 	const struct mcp251xfd_tx_ring *tx_ring = priv->tx;
+	int val_bytes = regmap_get_val_bytes(priv->map_rx);
 
 	if (IS_ENABLED(CONFIG_CAN_MCP251XFD_SANITY) &&
 	    (offset > tx_ring->obj_num ||
@@ -1322,7 +1323,7 @@ mcp251xfd_tef_obj_read(const struct mcp251xfd_priv *priv,
 	return regmap_bulk_read(priv->map_rx,
 				mcp251xfd_get_tef_obj_addr(offset),
 				hw_tef_obj,
-				sizeof(*hw_tef_obj) / sizeof(u32) * len);
+				sizeof(*hw_tef_obj) / val_bytes * len);
 }
 
 static int mcp251xfd_handle_tefif(struct mcp251xfd_priv *priv)
@@ -1511,11 +1512,12 @@ mcp251xfd_rx_obj_read(const struct mcp251xfd_priv *priv,
 		      const u8 offset, const u8 len)
 {
 	int err;
+	int val_bytes = regmap_get_val_bytes(priv->map_rx);
 
 	err = regmap_bulk_read(priv->map_rx,
 			       mcp251xfd_get_rx_obj_addr(ring, offset),
 			       hw_rx_obj,
-			       len * ring->obj_size / sizeof(u32));
+			       len * ring->obj_size / val_bytes);
 
 	return err;
 }
@@ -2139,6 +2141,7 @@ static irqreturn_t mcp251xfd_irq(int irq, void *dev_id)
 	struct mcp251xfd_priv *priv = dev_id;
 	irqreturn_t handled = IRQ_NONE;
 	int err;
+	int val_bytes = regmap_get_val_bytes(priv->map_reg);
 
 	if (priv->rx_int)
 		do {
@@ -2162,7 +2165,7 @@ static irqreturn_t mcp251xfd_irq(int irq, void *dev_id)
 		err = regmap_bulk_read(priv->map_reg, MCP251XFD_REG_INT,
 				       &priv->regs_status,
 				       sizeof(priv->regs_status) /
-				       sizeof(u32));
+				       val_bytes);
 		if (err)
 			goto out_fail;
 
-- 
2.25.1

Re: [PATCH v4] can: mcp251xfd: replace sizeof(u32) with val_bytes in regmap

[Marc Kleine-Budde]

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On Fri, Jan 22, 2021 at 04:13:34PM +0800, Su Yanjun wrote:
> The sizeof(u32) is hardcoded. It's better to use the config value in
> regmap.
> 
> It increases the size of target object, but it's flexible when new mcp chip
> need other val_bytes.
> 
> Signed-off-by: Su Yanjun <suyanjun218@gmail.com>

Applied to linux-can-next/testing.

Thanks,
Marc

-- 
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