From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Cochran Subject: [PATCH V2 0/7] support the cpts found on am335x devices Date: Mon, 15 Oct 2012 21:48:06 +0200 Message-ID: Cc: , David Miller , Cyril Chemparathy , Mugunthan V N , Sriramakrishnan A G To: Return-path: Received: from mail-wg0-f44.google.com ([74.125.82.44]:48587 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753893Ab2JOTsj (ORCPT ); Mon, 15 Oct 2012 15:48:39 -0400 Received: by mail-wg0-f44.google.com with SMTP id dr13so4753829wgb.1 for ; Mon, 15 Oct 2012 12:48:38 -0700 (PDT) Sender: netdev-owner@vger.kernel.org List-ID: This patch series, based on linux-3.7-rc1 plus the fixes I posted today, adds support for the Common Platform Time Sync (CPTS) found on the popular BeagleBone. The code enables hardware time stamping and a PTP Hardware Clock. Changes in V2 - Now uses device tree - Actually works with vanilla kernel This work has been tested using the linuxptp PTP stack, and it seems to be working quite well. One limitation of the hardware is that not possible to adjust the clock frequency. Even without with this capability, the driver will be still be useful for 802.1AS applications, since they typically use a free running clock. There is one open issue with this driver which will hopefully soon be resolved. Time stamping only works on UDP packets. Although Layer 2 is supposed to work according to the TRM, I have not yet figured out how. The UDP only works when setting an undocumented bit, so maybe someone from TI can fill me in on this. Thanks, Richard Richard Cochran (7): cpsw: rename register banks to match the reference manual cpsw: add missing fields to the CPSW_SS register bank. cpsw: correct the CPSW_PORT register bank declaration cpsw: add a common header file for regsiter declarations cpts: introduce time stamping code and a PTP hardware clock. cpsw: add a DT field for the cpts offset cpsw: use the time stamping capabilities of the cpts Documentation/devicetree/bindings/net/cpsw.txt | 11 +- arch/arm/boot/dts/am33xx.dtsi | 5 +- drivers/net/ethernet/ti/Kconfig | 8 + drivers/net/ethernet/ti/Makefile | 2 +- drivers/net/ethernet/ti/cpsw.c | 84 ++++- drivers/net/ethernet/ti/cpsw_reg.h | 81 ++++ drivers/net/ethernet/ti/cpts.c | 468 ++++++++++++++++++++++++ drivers/net/ethernet/ti/cpts.h | 148 ++++++++ include/linux/platform_data/cpsw.h | 1 + 9 files changed, 788 insertions(+), 20 deletions(-) create mode 100644 drivers/net/ethernet/ti/cpsw_reg.h create mode 100644 drivers/net/ethernet/ti/cpts.c create mode 100644 drivers/net/ethernet/ti/cpts.h -- 1.7.2.5