From: Simon Horman Date: Thu, 5 Sep 2019 15:10:58 +0000 (+0200) Subject: ravb: remove undocumented endianness selection X-Git-Tag: v5.4-rc1~131^2~64^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2d957a7e2a9b74eaa3243e1254724878825f95d2;p=thirdparty%2Fkernel%2Flinux.git ravb: remove undocumented endianness selection This patch removes the use of the undocumented BOC bit of the CCC register. Current documentation for EtherAVB (ravb) describes the offset of what the driver uses as the BOC bit as reserved and that only a value of 0 should be written. After some internal investigation with Renesas it remains unclear why this driver accesses these fields but regardless of what the historical reasons are the current code is considered incorrect. Based on work by Kazuya Mizuguchi Signed-off-by: Simon Horman Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h index 70eeceb7f8aef..bdb051f04b0c9 100644 --- a/drivers/net/ethernet/renesas/ravb.h +++ b/drivers/net/ethernet/renesas/ravb.h @@ -216,7 +216,6 @@ enum CCC_BIT { CCC_CSEL_HPB = 0x00010000, CCC_CSEL_ETH_TX = 0x00020000, CCC_CSEL_GMII_REF = 0x00030000, - CCC_BOC = 0x00100000, /* Undocumented? */ CCC_LBME = 0x01000000, }; diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index 4d1f274cded03..b538cc6fdbb70 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -447,12 +447,6 @@ static int ravb_dmac_init(struct net_device *ndev) ravb_ring_format(ndev, RAVB_BE); ravb_ring_format(ndev, RAVB_NC); -#if defined(__LITTLE_ENDIAN) - ravb_modify(ndev, CCC, CCC_BOC, 0); -#else - ravb_modify(ndev, CCC, CCC_BOC, CCC_BOC); -#endif - /* Set AVB RX */ ravb_write(ndev, RCR_EFFS | RCR_ENCF | RCR_ETS0 | RCR_ESF | 0x18000000, RCR);