From mboxrd@z Thu Jan 1 00:00:00 1970 From: mpa@pengutronix.de (Markus Pargmann) Date: Wed, 12 Aug 2015 12:12:35 +0200 Subject: [PATCH 10/20] regmap: _regmap_raw_multi_reg_write: Add reg_write() support In-Reply-To: <1439374365-20623-1-git-send-email-mpa@pengutronix.de> References: <1439374365-20623-1-git-send-email-mpa@pengutronix.de> Message-ID: <1439374365-20623-11-git-send-email-mpa@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Define a fallback for busses which do not define a write() function. Instead we write one register at a time using reg_write(). Without this patch, _regmap_raw_multi_reg_write would break as it tries to call bus->write() without checking if it exists before. Signed-off-by: Markus Pargmann --- drivers/base/regmap/regmap.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 78eb96288a68..87f15fb60bc5 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1778,6 +1778,20 @@ static int _regmap_raw_multi_reg_write(struct regmap *map, if (!len) return -EINVAL; + /* + * If bus->write is not supported we have to use reg_write for each + * register value. + */ + if (!map->bus->write) { + for (i = 0; i < num_regs; i++) { + ret = map->reg_write(map, regs[i].reg, regs[i].def); + if (ret) + return ret; + } + + return 0; + } + buf = kzalloc(len, GFP_KERNEL); if (!buf) return -ENOMEM; -- 2.4.6