Try slower SDIO

patches/openwrt/hack/0010-Try-slower-SDIO.patch

+From 42c09ae1d68d558bdc1f81062b2d0937290584a8 Mon Sep 17 00:00:00 2001
+From: Michal Hrusecky <Michal@Hrusecky.net>
+Date: Sun, 24 Feb 2019 13:26:17 +0100
+Subject: [PATCH] Try slower SDIO
+
+---
+ .../patches-4.14/666-Slow-down-SDIO.patch     | 46 +++++++++++++++++++
+ 1 file changed, 46 insertions(+)
+ create mode 100644 target/linux/mvebu/patches-4.14/666-Slow-down-SDIO.patch
+
+diff --git a/target/linux/mvebu/patches-4.14/666-Slow-down-SDIO.patch b/target/linux/mvebu/patches-4.14/666-Slow-down-SDIO.patch
+new file mode 100644
+index 0000000000..d91a0aae46
+--- /dev/null
++++ b/target/linux/mvebu/patches-4.14/666-Slow-down-SDIO.patch
+@@ -0,0 +1,46 @@
++From 07e2e362bb3b7e8f854e839807b1725dbce3c50c Mon Sep 17 00:00:00 2001
++From: Tomas Hlavacek <tmshlvck@gmail.com>
++Date: Sun, 24 Feb 2019 00:22:39 +0100
++Subject: [PATCH] Slow down SDIO
++
++---
++ drivers/mmc/core/sdio.c | 19 ++++++++++++-------
++ 1 file changed, 12 insertions(+), 7 deletions(-)
++
++diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
++index d8e17ea6126d..a2534e27e4bf 100644
++--- a/drivers/mmc/core/sdio.c
+++++ b/drivers/mmc/core/sdio.c
++@@ -160,17 +160,22 @@ static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
++ 				goto out;
++ 
++ 			if (mmc_host_uhs(card->host)) {
++-				if (data & SDIO_UHS_DDR50)
++-					card->sw_caps.sd3_bus_mode
++-						|= SD_MODE_UHS_DDR50;
++-
++-				if (data & SDIO_UHS_SDR50)
+++				if (data & SDIO_UHS_DDR50) {
+++					printk("%s card report SDIO_UHS_DDR50\n", __func__);
+++					card->sw_caps.sd3_bus_mode
+++						|= SD_MODE_UHS_DDR50;
+++				}
+++
+++				if (data & SDIO_UHS_SDR50) {
+++					printk("%s card report SDIO_UHS_SDR50\n", __func__);
++ 					card->sw_caps.sd3_bus_mode
++ 						|= SD_MODE_UHS_SDR50;
+++				}
++ 
++ 				if (data & SDIO_UHS_SDR104)
++-					card->sw_caps.sd3_bus_mode
++-						|= SD_MODE_UHS_SDR104;
+++					printk("%s card report SDIO_UHS_SDR104\n", __func__);
+++					/*card->sw_caps.sd3_bus_mode
+++						|= SD_MODE_UHS_SDR104;*/
++ 			}
++ 
++ 			ret = mmc_io_rw_direct(card, 0, 0,
++-- 
++2.19.1
++
+-- 
+2.20.1
+