5.5-stable patches

added patches:
	mmc-sdhci-of-esdhc-fix-esdhc_reset-for-different-controller-versions.patch

diff --git a/queue-5.5/mmc-sdhci-of-esdhc-fix-esdhc_reset-for-different-controller-versions.patch b/queue-5.5/mmc-sdhci-of-esdhc-fix-esdhc_reset-for-different-controller-versions.patch
new file mode 100644 (file)
index 0000000..d21c636
--- /dev/null
+++ b/queue-5.5/mmc-sdhci-of-esdhc-fix-esdhc_reset-for-different-controller-versions.patch
@@ -0,0 +1,90 @@
+From 2aa3d826adb578b26629a79b775a552cfe3fedf7 Mon Sep 17 00:00:00 2001
+From: Yangbo Lu <yangbo.lu@nxp.com>
+Date: Wed, 8 Jan 2020 12:07:12 +0800
+Subject: mmc: sdhci-of-esdhc: fix esdhc_reset() for different controller versions
+
+From: Yangbo Lu <yangbo.lu@nxp.com>
+
+commit 2aa3d826adb578b26629a79b775a552cfe3fedf7 upstream.
+
+This patch is to fix operating in esdhc_reset() for different
+controller versions, and to add bus-width restoring after data
+reset for eSDHC (verdor version <= 2.2).
+
+Also add annotation for understanding.
+
+Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
+Acked-by: Adrian Hunter <adrian.hunter@intel.com>
+Link: https://lore.kernel.org/r/20200108040713.38888-1-yangbo.lu@nxp.com
+Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/mmc/host/sdhci-of-esdhc.c |   43 ++++++++++++++++++++++++++++++++++----
+ 1 file changed, 39 insertions(+), 4 deletions(-)
+
+--- a/drivers/mmc/host/sdhci-of-esdhc.c
++++ b/drivers/mmc/host/sdhci-of-esdhc.c
+@@ -758,23 +758,58 @@ static void esdhc_reset(struct sdhci_hos
+ {
+       struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+       struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
+-      u32 val;
++      u32 val, bus_width = 0;
+ 
++      /*
++       * Add delay to make sure all the DMA transfers are finished
++       * for quirk.
++       */
+       if (esdhc->quirk_delay_before_data_reset &&
+           (mask & SDHCI_RESET_DATA) &&
+           (host->flags & SDHCI_REQ_USE_DMA))
+               mdelay(5);
+ 
++      /*
++       * Save bus-width for eSDHC whose vendor version is 2.2
++       * or lower for data reset.
++       */
++      if ((mask & SDHCI_RESET_DATA) &&
++          (esdhc->vendor_ver <= VENDOR_V_22)) {
++              val = sdhci_readl(host, ESDHC_PROCTL);
++              bus_width = val & ESDHC_CTRL_BUSWIDTH_MASK;
++      }
++
+       sdhci_reset(host, mask);
+ 
+-      sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
+-      sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
++      /*
++       * Restore bus-width setting and interrupt registers for eSDHC
++       * whose vendor version is 2.2 or lower for data reset.
++       */
++      if ((mask & SDHCI_RESET_DATA) &&
++          (esdhc->vendor_ver <= VENDOR_V_22)) {
++              val = sdhci_readl(host, ESDHC_PROCTL);
++              val &= ~ESDHC_CTRL_BUSWIDTH_MASK;
++              val |= bus_width;
++              sdhci_writel(host, val, ESDHC_PROCTL);
++
++              sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
++              sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
++      }
+ 
+-      if (mask & SDHCI_RESET_ALL) {
++      /*
++       * Some bits have to be cleaned manually for eSDHC whose spec
++       * version is higher than 3.0 for all reset.
++       */
++      if ((mask & SDHCI_RESET_ALL) &&
++          (esdhc->spec_ver >= SDHCI_SPEC_300)) {
+               val = sdhci_readl(host, ESDHC_TBCTL);
+               val &= ~ESDHC_TB_EN;
+               sdhci_writel(host, val, ESDHC_TBCTL);
+ 
++              /*
++               * Initialize eSDHC_DLLCFG1[DLL_PD_PULSE_STRETCH_SEL] to
++               * 0 for quirk.
++               */
+               if (esdhc->quirk_unreliable_pulse_detection) {
+                       val = sdhci_readl(host, ESDHC_DLLCFG1);
+                       val &= ~ESDHC_DLL_PD_PULSE_STRETCH_SEL;

diff --git a/queue-5.5/series b/queue-5.5/series
index ddaac75ac85ebd36f161106333ba54b53eff2816..880b5b3a60d1f83c79199ef5eb516268e2cde336 100644 (file)
--- a/queue-5.5/series
+++ b/queue-5.5/series
@@ -171,3 +171,4 @@ remoteproc-fix-null-pointer-dereference-in-rproc_virtio_notify.patch
 crypto-rng-fix-a-refcounting-bug-in-crypto_rng_reset.patch
 crypto-mxs-dcp-fix-scatterlist-linearization-for-hash.patch
 io_uring-honor-original-task-rlimit_fsize.patch
+mmc-sdhci-of-esdhc-fix-esdhc_reset-for-different-controller-versions.patch