From patchwork Mon Feb 14 07:19:05 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philip Rakity X-Patchwork-Id: 554291 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p1E7KJB5020011 for ; Mon, 14 Feb 2011 07:25:23 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751983Ab1BNHZP (ORCPT ); Mon, 14 Feb 2011 02:25:15 -0500 Received: from na3sys009aog110.obsmtp.com ([74.125.149.203]:50527 "EHLO na3sys009aog110.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751367Ab1BNHZP convert rfc822-to-8bit (ORCPT ); Mon, 14 Feb 2011 02:25:15 -0500 Received: from source ([65.219.4.130]) (using TLSv1) by na3sys009aob110.postini.com ([74.125.148.12]) with SMTP ID DSNKTVjY2jTiJ5x06R9YGVOzg41+xbkokvFD@postini.com; Sun, 13 Feb 2011 23:25:14 PST Received: from SC-vEXCH3.marvell.com ([10.93.76.133]) by sc-owa02.marvell.com ([10.93.76.22]) with mapi; Sun, 13 Feb 2011 23:19:08 -0800 From: Philip Rakity To: "linux-mmc@vger.kernel.org" CC: Mark Brown Date: Sun, 13 Feb 2011 23:19:05 -0800 Subject: [PATCH 4/4] sdhci: sdhci-pxa.c: add callback for signaling for DDR Thread-Topic: [PATCH 4/4] sdhci: sdhci-pxa.c: add callback for signaling for DDR Thread-Index: AcvMF3duDH8pnSSbR9mxN81YmKVlLQ== Message-ID: <30F8ED01-C591-4D70-BAE1-B96F396E4431@marvell.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US MIME-Version: 1.0 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Mon, 14 Feb 2011 07:25:23 +0000 (UTC) diff --git a/drivers/mmc/host/sdhci-pxa.c b/drivers/mmc/host/sdhci-pxa.c index 3d01f94..8527ac1 100644 --- a/drivers/mmc/host/sdhci-pxa.c +++ b/drivers/mmc/host/sdhci-pxa.c @@ -101,8 +101,25 @@ static unsigned int get_f_max_clock(struct sdhci_host *host) return pxa->pdata->max_speed; } +static unsigned int set_signaling_voltage(struct sdhci_host *host, + unsigned int ddr) +{ + u16 con; + + pr_debug("%s:%s\n", __func__, mmc_hostname(host->mmc)); + /* + * Set V18_EN -- DDR does not work without this. + * does not change signaling voltage + */ + con = readw(host->ioaddr + SDHCI_HOST_CONTROL_2); + con |= SDCTRL_2_SDH_V18_EN; + writew(con, host->ioaddr + SDHCI_HOST_CONTROL_2); + return 0; +} + static struct sdhci_ops sdhci_pxa_ops = { .platform_reset_exit = platform_reset_exit, + .set_signaling_voltage = set_signaling_voltage, .get_f_max_clock = NULL, };