Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932645AbbFELCY (ORCPT ); Fri, 5 Jun 2015 07:02:24 -0400 Received: from mga14.intel.com ([192.55.52.115]:59891 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932496AbbFELBg (ORCPT ); Fri, 5 Jun 2015 07:01:36 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,558,1427785200"; d="scan'208";a="721284718" From: Daniel Baluta To: jic23@kernel.org, pmeerw@pmeerw.net Cc: daniel.baluta@intel.com, knaack.h@gmx.de, lars@metafoo.de, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org Subject: [PATCH v2 4/6] iio: magnetometer: mmc35240: Use a smaller sleep value Date: Fri, 5 Jun 2015 14:03:13 +0300 Message-Id: <1433502195-30296-5-git-send-email-daniel.baluta@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1433502195-30296-1-git-send-email-daniel.baluta@intel.com> References: <1433502195-30296-1-git-send-email-daniel.baluta@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1124 Lines: 32 According to datasheet, Page 8, minimum wait time to complete measurement is 10ms. Adjusting this value will increase the userspace polling rate. Fixes: abeb6b1e7b ("iio: magnetometer: Add support for MEMSIC MMC35240") Signed-off-by: Daniel Baluta --- drivers/iio/magnetometer/mmc35240.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iio/magnetometer/mmc35240.c b/drivers/iio/magnetometer/mmc35240.c index 7fff38e..7bc72b3 100644 --- a/drivers/iio/magnetometer/mmc35240.c +++ b/drivers/iio/magnetometer/mmc35240.c @@ -219,7 +219,8 @@ static int mmc35240_take_measurement(struct mmc35240_data *data) return ret; if (reg_status & MMC35240_STATUS_MEAS_DONE_BIT) break; - msleep(20); + /* minimum wait time to complete measurement is 10 ms */ + usleep_range(10000, 11000); } if (tries < 0) { -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/