Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754567AbaFPIWb (ORCPT ); Mon, 16 Jun 2014 04:22:31 -0400 Received: from mail-qa0-f51.google.com ([209.85.216.51]:53752 "EHLO mail-qa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754386AbaFPIWa (ORCPT ); Mon, 16 Jun 2014 04:22:30 -0400 MIME-Version: 1.0 In-Reply-To: <1402679637-27611-2-git-send-email-markus.mayer@linaro.org> References: <1402679637-27611-1-git-send-email-markus.mayer@linaro.org> <1402679637-27611-2-git-send-email-markus.mayer@linaro.org> Date: Mon, 16 Jun 2014 10:22:29 +0200 Message-ID: Subject: Re: [PATCH v4 1/2] mmc: sdhci: Use mmc core regulator infrastucture From: Ulf Hansson To: Markus Mayer Cc: Chris Ball , Tim Kryger , Mike Looijmans , Andrew Bresticker , Linux MMC List , Linux Kernel Mailing List Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 13 June 2014 19:13, Markus Mayer wrote: > From: Tim Kryger > > Switch the common SDHCI code over to use mmc_host's regulator pointers > and remove the ones in the sdhci_host structure. Additionally, use the > common mmc_regulator_get_supply function to get the regulators and set > the ocr_avail mask. > > This change sets the ocr_avail directly based upon the voltage ranges > supported which ensures ocr_avail is set correctly while allowing the > use of regulators that can't provide exactly 1.8v, 3.0v, or 3.3v. > > Signed-off-by: Tim Kryger > Signed-off-by: Markus Mayer > Reviewed-by: Matt Porter Thanks! Applied for next. Kind regards Uffe > --- > drivers/mmc/host/sdhci.c | 97 ++++++++++++++++++----------------------------- > include/linux/mmc/sdhci.h | 3 -- > 2 files changed, 36 insertions(+), 64 deletions(-) > > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index 47055f3..ee524b0 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -1223,6 +1223,7 @@ EXPORT_SYMBOL_GPL(sdhci_set_clock); > static void sdhci_set_power(struct sdhci_host *host, unsigned char mode, > unsigned short vdd) > { > + struct mmc_host *mmc = host->mmc; > u8 pwr = 0; > > if (mode != MMC_POWER_OFF) { > @@ -1284,9 +1285,9 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned char mode, > mdelay(10); > } > > - if (host->vmmc) { > + if (!IS_ERR(mmc->supply.vmmc)) { > spin_unlock_irq(&host->lock); > - mmc_regulator_set_ocr(host->mmc, host->vmmc, vdd); > + mmc_regulator_set_ocr(host->mmc, mmc->supply.vmmc, vdd); > spin_lock_irq(&host->lock); > } > } > @@ -1440,13 +1441,15 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios) > { > unsigned long flags; > u8 ctrl; > + struct mmc_host *mmc = host->mmc; > > spin_lock_irqsave(&host->lock, flags); > > if (host->flags & SDHCI_DEVICE_DEAD) { > spin_unlock_irqrestore(&host->lock, flags); > - if (host->vmmc && ios->power_mode == MMC_POWER_OFF) > - mmc_regulator_set_ocr(host->mmc, host->vmmc, 0); > + if (!IS_ERR(mmc->supply.vmmc) && > + ios->power_mode == MMC_POWER_OFF) > + mmc_regulator_set_ocr(host->mmc, mmc->supply.vmmc, 0); > return; > } > > @@ -1707,6 +1710,7 @@ static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable) > static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, > struct mmc_ios *ios) > { > + struct mmc_host *mmc = host->mmc; > u16 ctrl; > int ret; > > @@ -1725,8 +1729,9 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, > ctrl &= ~SDHCI_CTRL_VDD_180; > sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); > > - if (host->vqmmc) { > - ret = regulator_set_voltage(host->vqmmc, 2700000, 3600000); > + if (!IS_ERR(mmc->supply.vqmmc)) { > + ret = regulator_set_voltage(mmc->supply.vqmmc, 2700000, > + 3600000); > if (ret) { > pr_warning("%s: Switching to 3.3V signalling voltage " > " failed\n", mmc_hostname(host->mmc)); > @@ -1746,8 +1751,8 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, > > return -EAGAIN; > case MMC_SIGNAL_VOLTAGE_180: > - if (host->vqmmc) { > - ret = regulator_set_voltage(host->vqmmc, > + if (!IS_ERR(mmc->supply.vqmmc)) { > + ret = regulator_set_voltage(mmc->supply.vqmmc, > 1700000, 1950000); > if (ret) { > pr_warning("%s: Switching to 1.8V signalling voltage " > @@ -1776,8 +1781,9 @@ static int sdhci_do_start_signal_voltage_switch(struct sdhci_host *host, > > return -EAGAIN; > case MMC_SIGNAL_VOLTAGE_120: > - if (host->vqmmc) { > - ret = regulator_set_voltage(host->vqmmc, 1100000, 1300000); > + if (!IS_ERR(mmc->supply.vqmmc)) { > + ret = regulator_set_voltage(mmc->supply.vqmmc, 1100000, > + 1300000); > if (ret) { > pr_warning("%s: Switching to 1.2V signalling voltage " > " failed\n", mmc_hostname(host->mmc)); > @@ -2962,25 +2968,22 @@ int sdhci_add_host(struct sdhci_host *host) > !(host->mmc->caps & MMC_CAP_NONREMOVABLE)) > mmc->caps |= MMC_CAP_NEEDS_POLL; > > + /* If there are external regulators, get them */ > + if (mmc_regulator_get_supply(mmc) == -EPROBE_DEFER) > + return -EPROBE_DEFER; > + > /* If vqmmc regulator and no 1.8V signalling, then there's no UHS */ > - host->vqmmc = regulator_get_optional(mmc_dev(mmc), "vqmmc"); > - if (IS_ERR_OR_NULL(host->vqmmc)) { > - if (PTR_ERR(host->vqmmc) < 0) { > - pr_info("%s: no vqmmc regulator found\n", > - mmc_hostname(mmc)); > - host->vqmmc = NULL; > - } > - } else { > - ret = regulator_enable(host->vqmmc); > - if (!regulator_is_supported_voltage(host->vqmmc, 1700000, > - 1950000)) > + if (!IS_ERR(mmc->supply.vqmmc)) { > + ret = regulator_enable(mmc->supply.vqmmc); > + if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 1700000, > + 1950000)) > caps[1] &= ~(SDHCI_SUPPORT_SDR104 | > SDHCI_SUPPORT_SDR50 | > SDHCI_SUPPORT_DDR50); > if (ret) { > pr_warn("%s: Failed to enable vqmmc regulator: %d\n", > mmc_hostname(mmc), ret); > - host->vqmmc = NULL; > + mmc->supply.vqmmc = NULL; > } > } > > @@ -3041,34 +3044,6 @@ int sdhci_add_host(struct sdhci_host *host) > > ocr_avail = 0; > > - host->vmmc = regulator_get_optional(mmc_dev(mmc), "vmmc"); > - if (IS_ERR_OR_NULL(host->vmmc)) { > - if (PTR_ERR(host->vmmc) < 0) { > - pr_info("%s: no vmmc regulator found\n", > - mmc_hostname(mmc)); > - host->vmmc = NULL; > - } > - } > - > -#ifdef CONFIG_REGULATOR > - /* > - * Voltage range check makes sense only if regulator reports > - * any voltage value. > - */ > - if (host->vmmc && regulator_get_voltage(host->vmmc) > 0) { > - ret = regulator_is_supported_voltage(host->vmmc, 2700000, > - 3600000); > - if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_330))) > - caps[0] &= ~SDHCI_CAN_VDD_330; > - if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_300))) > - caps[0] &= ~SDHCI_CAN_VDD_300; > - ret = regulator_is_supported_voltage(host->vmmc, 1700000, > - 1950000); > - if ((ret <= 0) || (!(caps[0] & SDHCI_CAN_VDD_180))) > - caps[0] &= ~SDHCI_CAN_VDD_180; > - } > -#endif /* CONFIG_REGULATOR */ > - > /* > * According to SD Host Controller spec v3.00, if the Host System > * can afford more than 150mA, Host Driver should set XPC to 1. Also > @@ -3077,8 +3052,8 @@ int sdhci_add_host(struct sdhci_host *host) > * value. > */ > max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT); > - if (!max_current_caps && host->vmmc) { > - u32 curr = regulator_get_current_limit(host->vmmc); > + if (!max_current_caps && !IS_ERR(mmc->supply.vmmc)) { > + u32 curr = regulator_get_current_limit(mmc->supply.vmmc); > if (curr > 0) { > > /* convert to SDHCI_MAX_CURRENT format */ > @@ -3118,8 +3093,11 @@ int sdhci_add_host(struct sdhci_host *host) > SDHCI_MAX_CURRENT_MULTIPLIER; > } > > + if (mmc->ocr_avail) > + ocr_avail &= mmc->ocr_avail; > + > if (host->ocr_mask) > - ocr_avail = host->ocr_mask; > + ocr_avail &= host->ocr_mask; > > mmc->ocr_avail = ocr_avail; > mmc->ocr_avail_sdio = ocr_avail; > @@ -3273,6 +3251,7 @@ EXPORT_SYMBOL_GPL(sdhci_add_host); > > void sdhci_remove_host(struct sdhci_host *host, int dead) > { > + struct mmc_host *mmc = host->mmc; > unsigned long flags; > > if (dead) { > @@ -3310,15 +3289,11 @@ void sdhci_remove_host(struct sdhci_host *host, int dead) > > tasklet_kill(&host->finish_tasklet); > > - if (host->vmmc) { > - regulator_disable(host->vmmc); > - regulator_put(host->vmmc); > - } > + if (!IS_ERR(mmc->supply.vmmc)) > + regulator_disable(mmc->supply.vmmc); > > - if (host->vqmmc) { > - regulator_disable(host->vqmmc); > - regulator_put(host->vqmmc); > - } > + if (!IS_ERR(mmc->supply.vqmmc)) > + regulator_disable(mmc->supply.vqmmc); > > if (host->adma_desc) > dma_free_coherent(mmc_dev(host->mmc), ADMA_SIZE, > diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h > index 08abe99..09ebe57 100644 > --- a/include/linux/mmc/sdhci.h > +++ b/include/linux/mmc/sdhci.h > @@ -104,9 +104,6 @@ struct sdhci_host { > > const struct sdhci_ops *ops; /* Low level hw interface */ > > - struct regulator *vmmc; /* Power regulator (vmmc) */ > - struct regulator *vqmmc; /* Signaling regulator (vccq) */ > - > /* Internal data */ > struct mmc_host *mmc; /* MMC structure */ > u64 dma_mask; /* custom DMA mask */ > -- > 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/