linux-kernel - [PATCH v4] can: mcp251xfd: replace sizeof(u32) with val

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Message-Id: <20210122081334.213957-1-suyanjun218@gmail.com>
Date:   Fri, 22 Jan 2021 16:13:34 +0800
From:   Su Yanjun <suyanjun218@...il.com>
To:     mkl@...gutronix.de, manivannan.sadhasivam@...aro.org,
        thomas.kopp@...rochip.com, wg@...ndegger.com, davem@...emloft.net,
        kuba@...nel.org, lgirdwood@...il.com, broonie@...nel.org
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Su Yanjun <suyanjun218@...il.com>
Subject: [PATCH v4] can: mcp251xfd: replace sizeof(u32) with val_bytes in regmap

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@...il.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