[PATCH V5 09/19] net: ks8851: Use 16-bit read of RXFC register
From: Marek Vasut <marex@denx.de>
Date: 2020-05-14 00:08:20
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
The RXFC register is the only one being read using 8-bit accessors. To make it easier to support the 16-bit accesses used by the parallel bus variant of KS8851, use 16-bit accessor to read RXFC register as well as neighboring RXFCTR register. Remove ks8851_rdreg8() as it is not used anywhere anymore. There should be no functional change. Signed-off-by: Marek Vasut <marex@denx.de> Cc: David S. Miller <davem@davemloft.net> Cc: Lukas Wunner <lukas@wunner.de> Cc: Petr Stetiar <redacted> Cc: YueHaibing <redacted> --- V2: No change V3: No change V4: Drop the NOTE from the comment, the performance is OK V5: No change --- drivers/net/ethernet/micrel/ks8851.c | 17 +---------------- 1 file changed, 1 insertion(+), 16 deletions(-)
diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c
index bb2f0dc8214d..b9820068c839 100644
--- a/drivers/net/ethernet/micrel/ks8851.c
+++ b/drivers/net/ethernet/micrel/ks8851.c@@ -236,21 +236,6 @@ static void ks8851_rdreg(struct ks8851_net *ks, unsigned op, memcpy(rxb, trx + 2, rxl); } -/** - * ks8851_rdreg8 - read 8 bit register from device - * @ks: The chip information - * @reg: The register address - * - * Read a 8bit register from the chip, returning the result -*/ -static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) -{ - u8 rxb[1]; - - ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); - return rxb[0]; -} - /** * ks8851_rdreg16 - read 16 bit register from device * @ks: The chip information
@@ -470,7 +455,7 @@ static void ks8851_rx_pkts(struct ks8851_net *ks) unsigned rxstat; u8 *rxpkt; - rxfc = ks8851_rdreg8(ks, KS_RXFC); + rxfc = (ks8851_rdreg16(ks, KS_RXFCTR) >> 8) & 0xff; netif_dbg(ks, rx_status, ks->netdev, "%s: %d packets\n", __func__, rxfc);
--
2.25.1