From patchwork Mon Jun 8 09:59:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 11592977 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8BD7C159A for ; Mon, 8 Jun 2020 09:59:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 738A4206A4 for ; Mon, 8 Jun 2020 09:59:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729271AbgFHJ7u (ORCPT ); Mon, 8 Jun 2020 05:59:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729294AbgFHJ7p (ORCPT ); Mon, 8 Jun 2020 05:59:45 -0400 Received: from michel.telenet-ops.be (michel.telenet-ops.be [IPv6:2a02:1800:110:4::f00:18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 48521C08C5CA for ; Mon, 8 Jun 2020 02:59:44 -0700 (PDT) Received: from ramsan ([IPv6:2a02:1810:ac12:ed60:c85f:a5bf:b1bd:702b]) by michel.telenet-ops.be with bizsmtp id oZzi2200A0R8aca06Zziol; Mon, 08 Jun 2020 11:59:42 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan with esmtp (Exim 4.90_1) (envelope-from ) id 1jiEZC-0007P0-Ak; Mon, 08 Jun 2020 11:59:42 +0200 Received: from geert by rox.of.borg with local (Exim 4.90_1) (envelope-from ) id 1jiEZC-0007x4-8K; Mon, 08 Jun 2020 11:59:42 +0200 From: Geert Uytterhoeven To: Mark Brown Cc: Chris Brandt , linux-spi@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-sh@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 0/8] spi: rspi: Bit rate improvements Date: Mon, 8 Jun 2020 11:59:32 +0200 Message-Id: <20200608095940.30516-1-geert+renesas@glider.be> X-Mailer: git-send-email 2.17.1 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Hi Mark, This patch series contains several improvements for the Renesas SPI/QSPI driver related to bit rate configuration. This has been tested on RSK+RZA1 (RSPI) and R-Car M2-W/Koelsch (QSPI), using a scope and logic analyzer, except for the by-one divider on QSPI. This has not been tested on legacy SuperH, due to lack of hardware. Thanks for your comments! Geert Uytterhoeven (8): spi: rspi: Remove useless .set_config_register() check spi: rspi: Use requested instead of maximum bit rate spi: rspi: Clean up Bit Rate Division Setting handling spi: rspi: Increase bit rate accuracy on RZ/A spi: rspi: Increase bit rate range for RSPI on SH spi: rspi: Increase bit rate range for QSPI spi: rspi: Fill in spi_transfer.effective_speed_hz spi: rspi: Fill in controller speed limits drivers/spi/spi-rspi.c | 101 ++++++++++++++++++++++++++++------------- 1 file changed, 69 insertions(+), 32 deletions(-)