Merge tag 'mmc-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Fix a few memoryleaks
   - Minor improvements to the card initialization sequence
   - Partially support sleepy GPIO controllers for pwrseq eMMC

  MMC host:
   - alcor: Work with multiple-entry sglists
   - alcor: Enable DMA for writes
   - meson-gx: Improve tuning support
   - meson-gx: Avoid clock glitch when switching to DDR modes
   - meson-gx: Disable unreliable HS400 mode
   - mmci: Minor updates for support of HW busy detection
   - mmci: Support data transfers for the stm32_sdmmc variant
   - mmci: Restructure code to better support different variants
   - mtk-sd: Add support for version found on MT7620 family SOCs
   - mtk-sd: Add support for the MT8516 version
   - mtk-sd: Add Chaotian Jing as the maintainer
   - sdhci: Reorganize request-code to convert from tasklet to workqueue
   - sdhci_am654: Stabilize support for lower speed modes
   - sdhci-esdhc-imx: Add HS400 support for iMX7ULP
   - sdhci-esdhc-imx: Add support for iMX7ULP version
   - sdhci-of-arasan: Allow to disable DCMDs via DT for CQE
   - sdhci-of-esdhc: Add support for the ls1028a version
   - sdhci-of-esdhc: Several fixups for errata
   - sdhci-pci: Fix BYT OCP setting
   - sdhci-pci: Add support for Intel CML
   - sdhci-tegra: Add support for system suspend/resume
   - sdhci-tegra: Add CQE support for Tegra186 WAR
   - sdhci-tegra: Add support for Tegra194
   - sdhci-tegra: Update HW tuning process

  MEMSTICK:
   - I volunteered to help as a maintainer for the memstick subsystem,
     which is reflected by an update to the MAINTAINERS file. Changes
     are funneled through my MMC git and we will use the linux-mmc
     mailing list.

  MEMSTICK host:
   - A few minor cleanups"

* tag 'mmc-v5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (87 commits)
  mmc: sdhci-pci: Fix BYT OCP setting
  dt-bindings: mmc: add DT bindings for ls1028a eSDHC host controller
  mmc: alcor: Drop pointer to mmc_host from alcor_sdmmc_host
  mmc: mtk-sd: select REGULATOR
  mmc: mtk-sd: enable internal card-detect logic.
  mmc: mtk-sd: add support for config found in mt7620 family SOCs.
  mmc: mtk-sd: don't hard-code interrupt trigger type
  mmc: core: Fix tag set memory leak
  dt-bindings: mmc: Add support for MT8516 to mtk-sd
  mmc: mmci: Prevent polling for busy detection in IRQ context
  mmc: mmci: Cleanup mmci_cmd_irq() for busy detect
  mmc: usdhi6rol0: mark expected switch fall-throughs
  mmc: core: Verify SD bus width
  mmc: sdhci-esdhc-imx: Add HS400 support for iMX7ULP
  mmc: sdhci-esdhc-imx: add pm_qos to interact with cpuidle
  dt-bindings: mmc: fsl-imx-esdhc: add imx7ulp compatible string
  mmc: meson-gx: add signal resampling tuning
  mmc: meson-gx: remove Rx phase tuning
  mmc: meson-gx: avoid clock glitch when switching to DDR modes
  mmc: meson-gx: disable HS400
  ...

1 files changed, 38 insertions, 3 deletions

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 8dbbc1f62b70..c391510e9ef4 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -14,6 +14,7 @@
 #include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/pm_qos.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/sdio.h>
@@ -73,6 +74,7 @@
 #define ESDHC_STROBE_DLL_CTRL_ENABLE	(1 << 0)
 #define ESDHC_STROBE_DLL_CTRL_RESET	(1 << 1)
 #define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT	3
+#define ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT	(4 << 20)
 
 #define ESDHC_STROBE_DLL_STATUS		0x74
 #define ESDHC_STROBE_DLL_STS_REF_LOCK	(1 << 1)
@@ -156,6 +158,8 @@
 #define ESDHC_FLAG_HS400_ES		BIT(11)
 /* The IP has Host Controller Interface for Command Queuing */
 #define ESDHC_FLAG_CQHCI		BIT(12)
+/* need request pmqos during low power */
+#define ESDHC_FLAG_PMQOS		BIT(13)
 
 struct esdhc_soc_data {
 	u32 flags;
@@ -204,6 +208,12 @@ static const struct esdhc_soc_data usdhc_imx7d_data = {
 			| ESDHC_FLAG_HS400,
 };
 
+static struct esdhc_soc_data usdhc_imx7ulp_data = {
+	.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
+			| ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
+			| ESDHC_FLAG_PMQOS | ESDHC_FLAG_HS400,
+};
+
 static struct esdhc_soc_data usdhc_imx8qxp_data = {
 	.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 			| ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
@@ -229,6 +239,7 @@ struct pltfm_imx_data {
 		WAIT_FOR_INT,        /* sent CMD12, waiting for response INT */
 	} multiblock_status;
 	u32 is_ddr;
+	struct pm_qos_request pm_qos_req;
 };
 
 static const struct platform_device_id imx_esdhc_devtype[] = {
@@ -257,6 +268,7 @@ static const struct of_device_id imx_esdhc_dt_ids[] = {
 	{ .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, },
 	{ .compatible = "fsl,imx6ull-usdhc", .data = &usdhc_imx6ull_data, },
 	{ .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, },
+	{ .compatible = "fsl,imx7ulp-usdhc", .data = &usdhc_imx7ulp_data, },
 	{ .compatible = "fsl,imx8qxp-usdhc", .data = &usdhc_imx8qxp_data, },
 	{ /* sentinel */ }
 };
@@ -983,15 +995,19 @@ static void esdhc_set_strobe_dll(struct sdhci_host *host)
 	/* force a reset on strobe dll */
 	writel(ESDHC_STROBE_DLL_CTRL_RESET,
 		host->ioaddr + ESDHC_STROBE_DLL_CTRL);
+	/* clear the reset bit on strobe dll before any setting */
+	writel(0, host->ioaddr + ESDHC_STROBE_DLL_CTRL);
+
 	/*
 	 * enable strobe dll ctrl and adjust the delay target
 	 * for the uSDHC loopback read clock
 	 */
 	v = ESDHC_STROBE_DLL_CTRL_ENABLE |
+		ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT |
 		(7 << ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT);
 	writel(v, host->ioaddr + ESDHC_STROBE_DLL_CTRL);
-	/* wait 1us to make sure strobe dll status register stable */
-	udelay(1);
+	/* wait 5us to make sure strobe dll status register stable */
+	udelay(5);
 	v = readl(host->ioaddr + ESDHC_STROBE_DLL_STATUS);
 	if (!(v & ESDHC_STROBE_DLL_STS_REF_LOCK))
 		dev_warn(mmc_dev(host->mmc),
@@ -1436,6 +1452,10 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	imx_data->socdata = of_id ? of_id->data : (struct esdhc_soc_data *)
 						  pdev->id_entry->driver_data;
 
+	if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
+		pm_qos_add_request(&imx_data->pm_qos_req,
+			PM_QOS_CPU_DMA_LATENCY, 0);
+
 	imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
 	if (IS_ERR(imx_data->clk_ipg)) {
 		err = PTR_ERR(imx_data->clk_ipg);
@@ -1557,6 +1577,8 @@ disable_ipg_clk:
 disable_per_clk:
 	clk_disable_unprepare(imx_data->clk_per);
 free_sdhci:
+	if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
+		pm_qos_remove_request(&imx_data->pm_qos_req);
 	sdhci_pltfm_free(pdev);
 	return err;
 }
@@ -1578,6 +1600,9 @@ static int sdhci_esdhc_imx_remove(struct platform_device *pdev)
 	clk_disable_unprepare(imx_data->clk_ipg);
 	clk_disable_unprepare(imx_data->clk_ahb);
 
+	if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
+		pm_qos_remove_request(&imx_data->pm_qos_req);
+
 	sdhci_pltfm_free(pdev);
 
 	return 0;
@@ -1649,6 +1674,9 @@ static int sdhci_esdhc_runtime_suspend(struct device *dev)
 	}
 	clk_disable_unprepare(imx_data->clk_ahb);
 
+	if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
+		pm_qos_remove_request(&imx_data->pm_qos_req);
+
 	return ret;
 }
 
@@ -1659,9 +1687,13 @@ static int sdhci_esdhc_runtime_resume(struct device *dev)
 	struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 	int err;
 
+	if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
+		pm_qos_add_request(&imx_data->pm_qos_req,
+			PM_QOS_CPU_DMA_LATENCY, 0);
+
 	err = clk_prepare_enable(imx_data->clk_ahb);
 	if (err)
-		return err;
+		goto remove_pm_qos_request;
 
 	if (!sdhci_sdio_irq_enabled(host)) {
 		err = clk_prepare_enable(imx_data->clk_per);
@@ -1690,6 +1722,9 @@ disable_per_clk:
 		clk_disable_unprepare(imx_data->clk_per);
 disable_ahb_clk:
 	clk_disable_unprepare(imx_data->clk_ahb);
+remove_pm_qos_request:
+	if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
+		pm_qos_remove_request(&imx_data->pm_qos_req);
 	return err;
 }
 #endif