From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751599AbaLPAWw (ORCPT ); Mon, 15 Dec 2014 19:22:52 -0500 Received: from mail-ie0-f178.google.com ([209.85.223.178]:48068 "EHLO mail-ie0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751457AbaLPAWa (ORCPT ); Mon, 15 Dec 2014 19:22:30 -0500 From: Doug Anderson To: Ulf Hansson , Heiko Stuebner , Jaehoon Chung , Seungwon Jeon Cc: Mark Brown , Alexandru Stan , Alim Akhtar , Sonny Rao , Andrew Bresticker , linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Doug Anderson , chris@printf.net, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/3] mmc: dw_mmc: Use mmc_regulator_set_vqmmc in start_signal_voltage_switch Date: Mon, 15 Dec 2014 16:22:19 -0800 Message-Id: <1418689340-29517-2-git-send-email-dianders@chromium.org> X-Mailer: git-send-email 2.2.0.rc0.207.ga3a616c In-Reply-To: <1418689340-29517-1-git-send-email-dianders@chromium.org> References: <1418689340-29517-1-git-send-email-dianders@chromium.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We've introduced a new helper in the MMC core: mmc_regulator_set_vqmmc(). Let's use this in dw_mmc. Using this new helper has some advantages: 1. We get the mmc_regulator_set_vqmmc() behavior of trying to match VQMMC and VMMC when the signal voltage is 3.3V. This ensures max compatibility. 2. We get rid of a few more warnings when probing unsupported voltages. 3. We get rid of some non-dw_mmc specific code in dw_mmc. Signed-off-by: Doug Anderson --- Changes in v3: - Continue to check for errors if VQMMC is not an error as per Andrew. Changes in v2: None drivers/mmc/host/dw_mmc.c | 17 ++++++----------- 1 file changed, 6 insertions(+), 11 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 67c0451..b3993d4 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1160,7 +1160,6 @@ static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) struct dw_mci *host = slot->host; u32 uhs; u32 v18 = SDMMC_UHS_18V << slot->id; - int min_uv, max_uv; int ret; /* @@ -1169,22 +1168,18 @@ static int dw_mci_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios) * does no harm but you need to set the regulator directly. Try both. */ uhs = mci_readl(host, UHS_REG); - if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) { - min_uv = 2700000; - max_uv = 3600000; + if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) uhs &= ~v18; - } else { - min_uv = 1700000; - max_uv = 1950000; + else uhs |= v18; - } + if (!IS_ERR(mmc->supply.vqmmc)) { - ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv); + ret = mmc_regulator_set_vqmmc(mmc, ios); if (ret) { dev_dbg(&mmc->class_dev, - "Regulator set error %d: %d - %d\n", - ret, min_uv, max_uv); + "Regulator set error %d - %s V\n", + ret, uhs & v18 ? "1.8" : "3.3"); return ret; } } -- 2.2.0.rc0.207.ga3a616c