From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754685AbcK1TSG (ORCPT ); Mon, 28 Nov 2016 14:18:06 -0500 Received: from skprod3.natinst.com ([130.164.80.24]:57577 "EHLO ni.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751654AbcK1TRf (ORCPT ); Mon, 28 Nov 2016 14:17:35 -0500 From: Zach Brown To: CC: , , , Subject: [PATCH v3 0/2] mmc: sdhci-pci: Use ACPI to set max frequency of sdio host controller Date: Mon, 28 Nov 2016 13:16:37 -0600 Message-ID: <1480360599-13295-1-git-send-email-zach.brown@ni.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-11-28_15:,, signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609300000 definitions=main-1611280310 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On some boards, max SDIO frequency is limited by trace lengths and other layout choices. We would like a way to specify this limitation so the driver can behave accordingly. This patch set assumes that the limitation has been reported in an ACPI table which the driver can check to get the max frequency. The first patch creates a PCI ID and support for the Intel byt sdio where NI is the subvendor. If CONFIG_ACPI is set, the second patch uses the ACPI table to set f_max during the new ni_byt_sdio_probe_slot. rv2: * Use acpi_evaluate_integer() instead of acpi_get_handle()/acpi_evaluate_object() pv1: * Removed redundant comment * Print info message if MXFQ not found in acpi table pv2: * Changed info message to error message if MXFQ not found * Replaced ni_byt_sdio_probe_slot with one of two versions depending on whether CONFIG_ACPI is set. pv3: * Replaced the two versions of ni_byt_sdio_probe_slot with new version that calls ni_set_max_freq. * Created ni_set_max_freq which sets the slot's max_freq if CONFIG_ACPI is set. Zach Brown (2): mmc: sdhci-pci: Add PCI ID for Intel byt sdio host controller sub-vended by NI mmc: sdhci-pci: Use ACPI to get max frequency for Intel byt sdio controller sub-vended by NI drivers/mmc/host/sdhci-pci-core.c | 56 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) -- 2.7.4