From: Adrian Hunter <adrian.hunter@intel.com>
To: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>,
ulf.hansson@linaro.org, robh+dt@kernel.org
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
Vijay Viswanath <vviswana@codeaurora.org>
Subject: Re: [PATCH V1 3/3] mmc: sdhci: Allow platform controlled voltage switching
Date: Tue, 19 May 2020 09:06:43 +0300 [thread overview]
Message-ID: <480cc8ee-27ae-2538-68d6-c382dbaca6bb@intel.com> (raw)
In-Reply-To: <1589541535-8523-4-git-send-email-vbadigan@codeaurora.org>
On 15/05/20 2:18 pm, Veerabhadrarao Badiganti wrote:
> From: Vijay Viswanath <vviswana@codeaurora.org>
>
> If vendor platform drivers are controlling whole logic of voltage
> switching, then sdhci driver no need control vqmmc regulator.
> So skip enabling/disable vqmmc from SDHC driver.
>
> Signed-off-by: Vijay Viswanath <vviswana@codeaurora.org>
> Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
> ---
> drivers/mmc/host/sdhci.c | 32 +++++++++++++++++++-------------
> drivers/mmc/host/sdhci.h | 1 +
> 2 files changed, 20 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index 1bb6b67..c010823 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -4098,6 +4098,7 @@ int sdhci_setup_host(struct sdhci_host *host)
> unsigned int override_timeout_clk;
> u32 max_clk;
> int ret;
> + bool enable_vqmmc = false;
>
> WARN_ON(host == NULL);
> if (host == NULL)
> @@ -4111,9 +4112,12 @@ int sdhci_setup_host(struct sdhci_host *host)
> * the host can take the appropriate action if regulators are not
> * available.
> */
> - ret = mmc_regulator_get_supply(mmc);
> - if (ret)
> - return ret;
> + if (!mmc->supply.vqmmc) {
> + ret = mmc_regulator_get_supply(mmc);
> + if (ret)
> + return ret;
> + enable_vqmmc = true;
> + }
>
> DBG("Version: 0x%08x | Present: 0x%08x\n",
> sdhci_readw(host, SDHCI_HOST_VERSION),
> @@ -4373,7 +4377,15 @@ int sdhci_setup_host(struct sdhci_host *host)
> mmc->caps |= MMC_CAP_NEEDS_POLL;
>
> if (!IS_ERR(mmc->supply.vqmmc)) {
> - ret = regulator_enable(mmc->supply.vqmmc);
> + if (enable_vqmmc) {
> + ret = regulator_enable(mmc->supply.vqmmc);
> + if (ret) {
> + pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
> + mmc_hostname(mmc), ret);
> + mmc->supply.vqmmc = ERR_PTR(-EINVAL);
> + }
> + host->vqmmc_enabled = !ret;
> + }
>
> /* If vqmmc provides no 1.8V signalling, then there's no UHS */
> if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 1700000,
> @@ -4386,12 +4398,6 @@ int sdhci_setup_host(struct sdhci_host *host)
> if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 2700000,
> 3600000))
> host->flags &= ~SDHCI_SIGNALING_330;
> -
> - if (ret) {
> - pr_warn("%s: Failed to enable vqmmc regulator: %d\n",
> - mmc_hostname(mmc), ret);
> - mmc->supply.vqmmc = ERR_PTR(-EINVAL);
> - }
> }
>
> if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) {
> @@ -4625,7 +4631,7 @@ int sdhci_setup_host(struct sdhci_host *host)
> return 0;
>
> unreg:
> - if (!IS_ERR(mmc->supply.vqmmc))
> + if (host->vqmmc_enabled)
> regulator_disable(mmc->supply.vqmmc);
> undma:
> if (host->align_buffer)
> @@ -4643,7 +4649,7 @@ void sdhci_cleanup_host(struct sdhci_host *host)
> {
> struct mmc_host *mmc = host->mmc;
>
> - if (!IS_ERR(mmc->supply.vqmmc))
> + if (host->vqmmc_enabled)
> regulator_disable(mmc->supply.vqmmc);
>
> if (host->align_buffer)
> @@ -4780,7 +4786,7 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
>
> destroy_workqueue(host->complete_wq);
>
> - if (!IS_ERR(mmc->supply.vqmmc))
> + if (host->vqmmc_enabled)
> regulator_disable(mmc->supply.vqmmc);
>
> if (host->align_buffer)
> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> index 8d2a096..24d27e1 100644
> --- a/drivers/mmc/host/sdhci.h
> +++ b/drivers/mmc/host/sdhci.h
> @@ -570,6 +570,7 @@ struct sdhci_host {
> u32 caps1; /* CAPABILITY_1 */
> bool read_caps; /* Capability flags have been read */
>
> + bool vqmmc_enabled; /* Vqmmc is enabled */
Last time around there was dissatisfaction with this variable name. Perhaps
change it to sdhci_core_to_disable_vqmmc
> unsigned int ocr_avail_sdio; /* OCR bit masks */
> unsigned int ocr_avail_sd;
> unsigned int ocr_avail_mmc;
>
next prev parent reply other threads:[~2020-05-19 6:06 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-15 11:18 [PATCH V1 0/3] Internal voltage control for qcom SDHC Veerabhadrarao Badiganti
2020-05-15 11:18 ` [PATCH V1 1/3] dt-bindings: mmc: Supply max load for mmc supplies Veerabhadrarao Badiganti
2020-05-15 11:18 ` [PATCH V1 2/3] mmc: sdhci-msm: Use internal voltage control Veerabhadrarao Badiganti
2020-05-18 19:57 ` Bjorn Andersson
2020-05-19 3:11 ` Bjorn Andersson
2020-05-20 11:16 ` Veerabhadrarao Badiganti
2020-05-21 18:21 ` Bjorn Andersson
2020-05-15 11:18 ` [PATCH V1 3/3] mmc: sdhci: Allow platform controlled voltage switching Veerabhadrarao Badiganti
2020-05-19 6:06 ` Adrian Hunter [this message]
2020-05-20 11:19 ` Veerabhadrarao Badiganti
2020-05-21 15:23 ` [PATCH V2 0/3] Internal voltage control for qcom SDHC Veerabhadrarao Badiganti
2020-05-21 15:23 ` [PATCH V2 1/3] dt-bindings: mmc: Supply max load for mmc supplies Veerabhadrarao Badiganti
2020-05-28 23:23 ` Rob Herring
2020-05-21 15:23 ` [PATCH V2 2/3] mmc: sdhci-msm: Use internal voltage control Veerabhadrarao Badiganti
2020-05-21 19:07 ` Bjorn Andersson
2020-05-22 13:27 ` Veerabhadrarao Badiganti
2020-05-22 17:04 ` Bjorn Andersson
2020-05-28 7:13 ` Veerabhadrarao Badiganti
2020-05-21 15:23 ` [PATCH V2 3/3] mmc: sdhci: Allow platform controlled voltage switching Veerabhadrarao Badiganti
2020-05-25 5:42 ` Adrian Hunter
2020-06-02 10:47 ` [PATCH V3 0/3] Internal voltage control for qcom SDHC Veerabhadrarao Badiganti
2020-06-02 10:47 ` [PATCH V3 1/3] dt-bindings: mmc: Supply max load for mmc supplies Veerabhadrarao Badiganti
2020-06-09 23:02 ` Rob Herring
2020-06-10 10:00 ` Mark Brown
2020-06-02 10:47 ` [PATCH V3 2/3] mmc: sdhci: Allow platform controlled voltage switching Veerabhadrarao Badiganti
2020-06-02 10:47 ` [PATCH V3 3/3] mmc: sdhci-msm: Use internal voltage control Veerabhadrarao Badiganti
2020-06-09 3:34 ` Veerabhadrarao Badiganti
2020-06-16 15:36 ` [PATCH V4 0/2] Internal voltage control for qcom SDHC Veerabhadrarao Badiganti
2020-06-16 15:36 ` [PATCH V4 1/2] mmc: sdhci: Allow platform controlled voltage switching Veerabhadrarao Badiganti
2020-06-16 15:36 ` [PATCH V4 2/2] mmc: sdhci-msm: Use internal voltage control Veerabhadrarao Badiganti
2020-06-17 9:34 ` Ulf Hansson
2020-06-17 12:45 ` Veerabhadrarao Badiganti
2020-06-17 14:16 ` Ulf Hansson
2020-06-18 6:30 ` Veerabhadrarao Badiganti
2020-06-23 13:34 ` [PATCH V5 0/3] Internal voltage control for qcom SDHC Veerabhadrarao Badiganti
2020-06-23 13:34 ` [PATCH V5 1/3] mmc: sdhci: Allow platform controlled voltage switching Veerabhadrarao Badiganti
2020-06-23 13:34 ` [PATCH V5 2/3] mmc: core: Set default power mode in mmc_alloc_host Veerabhadrarao Badiganti
2020-06-23 13:34 ` [PATCH V5 3/3] mmc: sdhci-msm: Use internal voltage control Veerabhadrarao Badiganti
2020-07-06 14:49 ` [PATCH V5 0/3] Internal voltage control for qcom SDHC Ulf Hansson
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