From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from metis.ext.pengutronix.de ([92.198.50.35]:56010 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751675AbbHLKNo (ORCPT ); Wed, 12 Aug 2015 06:13:44 -0400 From: Markus Pargmann To: Mark Brown , Jonathan Cameron Cc: Srinivas Pandruvada , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de, Markus Pargmann Subject: [PATCH 09/20] regmap: _regmap_raw_write fix for busses without write() Date: Wed, 12 Aug 2015 12:12:34 +0200 Message-Id: <1439374365-20623-10-git-send-email-mpa@pengutronix.de> In-Reply-To: <1439374365-20623-1-git-send-email-mpa@pengutronix.de> References: <1439374365-20623-1-git-send-email-mpa@pengutronix.de> Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org Some busses don't have a write() function defined. However we can use reg_write() in special cases. This patch adds support for reg_write() and throws errors if it was unsuccessful. Signed-off-by: Markus Pargmann --- drivers/base/regmap/regmap.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 510dab052a95..78eb96288a68 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1229,6 +1229,11 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg, } } + if (!map->bus->write && val_len == map->format.val_bytes) { + ret = _regmap_bus_reg_write(map, reg, *(unsigned int *)val); + return ret; + } + range = _regmap_range_lookup(map, reg); if (range) { int val_num = val_len / map->format.val_bytes; @@ -1340,7 +1345,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg, * send the work_buf directly, otherwise try to do a gather * write. */ - if (val == work_val) { + if (val == work_val && map->bus->write) { ret = map->bus->write(map->bus_context, map->work_buf, map->format.reg_bytes + map->format.pad_bytes + @@ -1354,7 +1359,7 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg, val, val_len); /* If that didn't work fall back on linearising by hand. */ - if (ret == -ENOTSUPP) { + if (ret == -ENOTSUPP && map->bus->write) { len = map->format.reg_bytes + map->format.pad_bytes + val_len; buf = kzalloc(len, GFP_KERNEL); -- 2.4.6