Add description for resets/reset-names.
Cc: <[email protected]> # v5.4+
Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC")
Signed-off-by: Wenbin Mei <[email protected]>
Tested-by: Frank Wunderlich <[email protected]>
---
Documentation/devicetree/bindings/mmc/mtk-sd.txt | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
index 8a532f4453f2..09aecec47003 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.txt
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
@@ -49,6 +49,8 @@ Optional properties:
error caused by stop clock(fifo full)
Valid range = [0:0x7]. if not present, default value is 0.
applied to compatible "mediatek,mt2701-mmc".
+- resets: Phandle and reset specifier pair to softreset line of MSDC IP.
+- reset-names: Should be "hrst".
Examples:
mmc0: mmc@11230000 {
--
2.18.0
This commit adds reset node for mmc device.
Cc: <[email protected]> # v5.4+
Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC")
Signed-off-by: Wenbin Mei <[email protected]>
Tested-by: Frank Wunderlich <[email protected]>
---
arch/arm64/boot/dts/mediatek/mt7622.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
index 1a39e0ef776b..5b9ec032ce8d 100644
--- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
@@ -686,6 +686,8 @@
clocks = <&pericfg CLK_PERI_MSDC30_0_PD>,
<&topckgen CLK_TOP_MSDC50_0_SEL>;
clock-names = "source", "hclk";
+ resets = <&pericfg MT7622_PERI_MSDC0_SW_RST>;
+ reset-names = "hrst";
status = "disabled";
};
--
2.18.0
This patch fixs eMMC-Access on mt7622/Bpi-64.
Before we got these Errors on mounting eMMC ion R64:
[ 48.664925] blk_update_request: I/O error, dev mmcblk0, sector 204800 op 0x1:(WRITE)
flags 0x800 phys_seg 1 prio class 0
[ 48.676019] Buffer I/O error on dev mmcblk0p1, logical block 0, lost sync page write
This patch adds a optional reset management for msdc.
Sometimes the bootloader does not bring msdc register
to default state, so need reset the msdc controller.
Cc: <[email protected]> # v5.4+
Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC")
Signed-off-by: Wenbin Mei <[email protected]>
Tested-by: Frank Wunderlich <[email protected]>
---
drivers/mmc/host/mtk-sd.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 39e7fc54c438..fc97d5bf3a20 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -22,6 +22,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
+#include <linux/reset.h>
#include <linux/mmc/card.h>
#include <linux/mmc/core.h>
@@ -434,6 +435,7 @@ struct msdc_host {
struct msdc_save_para save_para; /* used when gate HCLK */
struct msdc_tune_para def_tune_para; /* default tune setting */
struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */
+ struct reset_control *reset;
};
static const struct mtk_mmc_compatible mt8135_compat = {
@@ -1516,6 +1518,12 @@ static void msdc_init_hw(struct msdc_host *host)
u32 val;
u32 tune_reg = host->dev_comp->pad_tune_reg;
+ if (host->reset) {
+ reset_control_assert(host->reset);
+ usleep_range(10, 50);
+ reset_control_deassert(host->reset);
+ }
+
/* Configure to MMC/SD mode, clock free running */
sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN);
@@ -2273,6 +2281,11 @@ static int msdc_drv_probe(struct platform_device *pdev)
if (IS_ERR(host->src_clk_cg))
host->src_clk_cg = NULL;
+ host->reset = devm_reset_control_get_optional_exclusive(&pdev->dev,
+ "hrst");
+ if (IS_ERR(host->reset))
+ return PTR_ERR(host->reset);
+
host->irq = platform_get_irq(pdev, 0);
if (host->irq < 0) {
ret = -EINVAL;
--
2.18.0
Hi,
it looks like you still miss a blank line between subject and your text in cover-letter
regards Frank
> Betreff: [v4, 0/3] mmc: mediatek: add optional reset property mmc: mediatek: add optional module reset property arm64: dts: mt7622: add reset node for mmc device Documentation/devicetree/bindings/mmc/mtk-sd.txt | 2 ++ arch/arm64/boot/dts/mediatek/mt7622.dtsi | 2 ++ drivers/mmc/host/mtk-sd.c | 13 +++++++++++++ 3 files changed, 17 insertions(+)
>
> --
> 2.18.0
It would be good to provide a list of the changes, so that one can easily
understand what's the difference between v3 and v4. On a quick glimpse I didn't
see any changes.
Regards,
Matthias
On 13/08/2020 11:06, Wenbin Mei wrote:
> --
> 2.18.0
>
Sorry for the inconvenience, there is no changes between V3 and V4, V3
is wrong with my subject line, and V4 fix it.
On Thu, 2020-08-13 at 15:54 +0200, Matthias Brugger wrote:
> It would be good to provide a list of the changes, so that one can easily
> understand what's the difference between v3 and v4. On a quick glimpse I didn't
> see any changes.
>
> Regards,
> Matthias
>
> On 13/08/2020 11:06, Wenbin Mei wrote:
> > --
> > 2.18.0
> >