1 files changed, 46 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0802-mmc-sdhci-iproc-Fix-vmmc-regulators-on-iProc.patch b/target/linux/bcm27xx/patches-4.19/950-0802-mmc-sdhci-iproc-Fix-vmmc-regulators-on-iProc.patch
new file mode 100644
index 0000000000..5046fc91e9
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0802-mmc-sdhci-iproc-Fix-vmmc-regulators-on-iProc.patch
@@ -0,0 +1,46 @@
+From 5ee0de9d7abd644d4cb678fe26ac5130a1a8075f Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Fri, 2 Aug 2019 15:20:11 +0100
+Subject: [PATCH] mmc: sdhci-iproc: Fix vmmc regulators on iProc
+
+The Linux support for controlling card power via regulators appears to
+be contentious. I would argue that the default behaviour is contrary to
+the SDHCI spec - turning off the power writes a reserved value to the
+SD Bus Voltage Select field of the Power Control Register, which
+seems to kill the Arasan/iProc controller - but fortunately there is a
+hook in sdhci_ops to override the behaviour. Borrow the implementation
+from sdhci_arasan_set_power.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/mmc/host/sdhci-iproc.c | 12 ++++++++++++
+ 1 file changed, 12 insertions(+)
+
+--- a/drivers/mmc/host/sdhci-iproc.c
++++ b/drivers/mmc/host/sdhci-iproc.c
+@@ -162,6 +162,17 @@ static void sdhci_iproc_writeb(struct sd
+ 	sdhci_iproc_writel(host, newval, reg & ~3);
+ }
+ 
++static void sdhci_iproc_set_power(struct sdhci_host *host, unsigned char mode,
++				  unsigned short vdd)
++{
++	if (!IS_ERR(host->mmc->supply.vmmc)) {
++		struct mmc_host *mmc = host->mmc;
++
++		mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
++	}
++	sdhci_set_power_noreg(host, mode, vdd);
++}
++
+ static const struct sdhci_ops sdhci_iproc_ops = {
+ 	.set_clock = sdhci_set_clock,
+ 	.get_max_clock = sdhci_pltfm_clk_get_max_clock,
+@@ -178,6 +189,7 @@ static const struct sdhci_ops sdhci_ipro
+ 	.write_w = sdhci_iproc_writew,
+ 	.write_b = sdhci_iproc_writeb,
+ 	.set_clock = sdhci_set_clock,
++	.set_power = sdhci_iproc_set_power,
+ 	.get_max_clock = sdhci_pltfm_clk_get_max_clock,
+ 	.set_bus_width = sdhci_set_bus_width,
+ 	.reset = sdhci_reset,