From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: [PATCH-RFC 0/3] mmc: switch to 1-bit mode which stopping clocks. Date: Wed, 28 Jan 2015 10:35:24 +1100 Message-ID: <20150127233118.32160.11899.stgit@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Tony Lindgren , Ulf Hansson Cc: GTA04 owners , linux-omap@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Andreas Fenkart List-Id: linux-mmc@vger.kernel.org An mmc/sdio host which is expecting interrupts from an SDIO card should not turn off clocks unless the bus is configured to a width of 1-bit. In 4-bit mode interrupts may not be generated without the clock. This series fixes omap_hsmmc to set 1-bit mode when appropriate and so allows my wifi chip to work much better. This is an RFC. The code seems to work, but I feel it could be structured better (so that other drivers can share more of it), and I need to convince myself there is no room for races. Thanks, NeilBrown --- NeilBrown (3): mmc: core: allow non-blocking form of mmc_claim_host mmc: core: export functions for setting bus width. mmc: omap_hsmmc: switch to 1-bit before turning off clocks if interrupts expected. drivers/mmc/core/core.c | 4 ++- drivers/mmc/core/sdio.c | 8 +++--- drivers/mmc/host/omap_hsmmc.c | 55 ++++++++++++++++++++++++++++++++++++++++- include/linux/mmc/host.h | 4 +++ 4 files changed, 64 insertions(+), 7 deletions(-) -- Signature