From patchwork Wed Mar 11 10:49:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philippe Schenker X-Patchwork-Id: 243522 List-Id: U-Boot discussion From: philippe.schenker at toradex.com (Philippe Schenker) Date: Wed, 11 Mar 2020 11:49:47 +0100 Subject: [PATCH v2 2/2] config: apalis-imx8: Enable FEC TXC delay In-Reply-To: <20200311104947.26999-1-philippe.schenker@toradex.com> References: <20200311104947.26999-1-philippe.schenker@toradex.com> Message-ID: <20200311104947.26999-2-philippe.schenker@toradex.com> define FEC_ENET_ENABLE_TXC_DELAY to enable the delay on TXC line on the MAC. This has to be done in order to meet RGMII specs. According to RGMII specs the clock should get delayed so the edges of the clock are preferrably in the middle of the edges of data-lines so they can be sampled properly. Our PHY expects the MAC to delay TXC line, as it is also written in the spec. This patch makes sure the TXC delay on the FEC is enabled Signed-off-by: Philippe Schenker --- Changes in v2: - Entered a 'why' description in patch 'config: apalis-imx8: Enable FEC TXC delay' include/configs/apalis-imx8.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/configs/apalis-imx8.h b/include/configs/apalis-imx8.h index bea035c3e23..40037157339 100644 --- a/include/configs/apalis-imx8.h +++ b/include/configs/apalis-imx8.h @@ -24,6 +24,7 @@ /* Networking */ #define FEC_QUIRK_ENET_MAC +#define FEC_ENET_ENABLE_TXC_DELAY #define CONFIG_TFTP_TSIZE