Merge tag 'mmc-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:

   - Add a new host cap bit and a corresponding DT property, to support
     power cycling of the card by FW at system suspend/resume.

   - Fix clock rate setting for SDIO in SDR12/SDR25 speed-mode

   - Fix switch to 1/4-bit mode at system suspend/resume for SD-combo
     cards

   - Convert the mmc-pwrseq DT bindings to the json-schema

   - Always allow the card detect uevent to be consumed by userspace

  MMC host controllers:

   - Convert a few DT bindings to the json-schema

   - mtk-sd:
      - Add support for command queue through cqhci
      - Add support for the MT6779 variant

   - renesas_sdhi_internal_dmac:
      - Fix dma unmapping in the error path

   - sdhci_am654:
      - Add support for the AM65x PG2.0 variant
      - Extend support for phys/clocks

   - sdhci-cadence:
      - Drop incorrect HW tuning for SD mode

   - sdhci-msm:
      - Add support for interconnect bandwidth scaling
      - Enable internal voltage control
      - Enable low power state for pinctrls

   - sdhci-of-at91:
      - Ludovic Desroches handovers maintenance to Eugen Hristev

   - sdhci-pci-gli:
      - Improve clock handling for GL975x

   - sdhci-pci-o2micro:
      - Add HW tuning for SDR104 mode
      - Fix support for O2 host controller Seabird1"

* tag 'mmc-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (66 commits)
  mmc: mediatek: make function msdc_cqe_disable() static
  MAINTAINERS: mmc: sdhci-of-at91: handover maintenance to Eugen Hristev
  dt-bindings: mmc: mediatek: Add document for mt6779
  mmc: mediatek: command queue support
  mmc: mediatek: refine msdc timeout api
  mmc: mediatek: add MT6779 MMC driver support
  mmc: sdhci-pci-o2micro: Add HW tuning for SDR104 mode
  mmc: sdhci-pci-o2micro: Bug fix for O2 host controller Seabird1
  mmc: via-sdmmc: use generic power management
  memstick: jmb38x_ms: use generic power management
  mmc: sdhci-cadence: do not use hardware tuning for SD mode
  mmc: sdhci-pci-gli: Set SDR104's clock to 205MHz and enable SSC for GL975x
  mmc: cqhci: Fix a print format for the task descriptor
  mmc: sdhci-of-arasan: fix timings allocation code
  mmc: sdhci: Fix a potential uninitialized variable
  dt-bindings: mmc: renesas,sdhi: convert to YAML
  dt-bindings: mmc: convert arasan sdhci bindings to yaml
  mmc: sdhci: Fix potential null pointer access while accessing vqmmc
  mmc: core: Add MMC_CAP2_FULL_PWR_CYCLE_IN_SUSPEND
  dt-bindings: mmc: Add full-pwr-cycle-in-suspend property
  ...

1 files changed, 16 insertions, 8 deletions

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 1ee866a38794..3ad394b40eb1 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -4104,7 +4104,8 @@ int sdhci_setup_host(struct sdhci_host *host)
 	unsigned int ocr_avail;
 	unsigned int override_timeout_clk;
 	u32 max_clk;
-	int ret;
+	int ret = 0;
+	bool enable_vqmmc = false;
 
 	WARN_ON(host == NULL);
 	if (host == NULL)
@@ -4118,9 +4119,12 @@ 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),
@@ -4377,7 +4381,10 @@ 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);
+			host->sdhci_core_to_disable_vqmmc = !ret;
+		}
 
 		/* If vqmmc provides no 1.8V signalling, then there's no UHS */
 		if (!regulator_is_supported_voltage(mmc->supply.vqmmc, 1700000,
@@ -4396,6 +4403,7 @@ int sdhci_setup_host(struct sdhci_host *host)
 				mmc_hostname(mmc), ret);
 			mmc->supply.vqmmc = ERR_PTR(-EINVAL);
 		}
+
 	}
 
 	if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V) {
@@ -4626,7 +4634,7 @@ int sdhci_setup_host(struct sdhci_host *host)
 	return 0;
 
 unreg:
-	if (!IS_ERR(mmc->supply.vqmmc))
+	if (host->sdhci_core_to_disable_vqmmc)
 		regulator_disable(mmc->supply.vqmmc);
 undma:
 	if (host->align_buffer)
@@ -4644,7 +4652,7 @@ void sdhci_cleanup_host(struct sdhci_host *host)
 {
 	struct mmc_host *mmc = host->mmc;
 
-	if (!IS_ERR(mmc->supply.vqmmc))
+	if (host->sdhci_core_to_disable_vqmmc)
 		regulator_disable(mmc->supply.vqmmc);
 
 	if (host->align_buffer)
@@ -4787,7 +4795,7 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
 
 	destroy_workqueue(host->complete_wq);
 
-	if (!IS_ERR(mmc->supply.vqmmc))
+	if (host->sdhci_core_to_disable_vqmmc)
 		regulator_disable(mmc->supply.vqmmc);
 
 	if (host->align_buffer)