[PATCH 00/17] Add Renesas RZ/G3L SD/eMMC support

[PATCH 00/17] Add Renesas RZ/G3L SD/eMMC support

[Biju]

From: Biju Das <biju.das.jz@bp.renesas.com>

RZ/G3L SoC has:

Channel 0 supports SD and eMMC (including HS400/HS400ES).
Channel 1 supports SD and eMMC (except for HS400).
Channel 2 supports SD.

The SoC supports a maximum frequency of 150 MHz. The SD0 interface does
not support IOVS and PWEN in the SDHI register (no internal regulator),
unlike SD1 and SD2. It has an internal divider for all modes except HS400.
It also has a 2048-bit divider compared to 512 on others. Moreover
RZ/G3L supports HS400 enhanced strobe mode.

Biju Das (17):
  dt-bindings: mmc: renesas,sdhi: Document RZ/G3L (r9a08g046) SoC
  clk: renesas: r9a08g046: Add clock and reset entries for SDHI
  pinctrl: renesas: rzg2l: Add SD channel POC support for RZ/G3L
  mmc: renesas_sdhi: Fix whitespace alignment in struct
    renesas_sdhi_of_data
  mmc: renesas_sdhi_internal_dmac: Fix whitespace alignment in struct
    initializer
  mmc: renesas_sdhi: Introduce renesas_sdhi_hw_info to abstract clock
    mask
  mmc: renesas_sdhi: Add max_divider to renesas_sdhi_hw_info
  mmc: renesas_sdhi: Add tuning_delay hw_info flag
  mmc: renesas_sdhi: Add internal_divider hw_info flag for clk rate
    adjustment
  mmc: renesas_sdhi: Add optional axis/axim reset controls
  mmc: renesas_sdhi: Add RZ/G3L SDHI support
  mmc: renesas_sdhi: Save and restore IOVS across suspend/resume
  mmc: renesas_sdhi: Add RZ/G3L HS400 support
  mmc: renesas_sdhi: Add HS400 enhanced strobe support for RZ/G3L
  arm64: dts: renesas: r9a08g046: Add SDHI nodes for RZ/G3L SoC and
    SDHI1 pincontrol on SMARC EVK
  arm64: dts: renesas: rzg3l-smarc-som: Enable SD/eMMC on SDHI0
  arm64: dts: renesas: rzg3l-smarc-som: Enable SDHI2

 .../devicetree/bindings/mmc/renesas,sdhi.yaml | 101 ++++++--
 arch/arm64/boot/dts/renesas/r9a08g046.dtsi    |  73 +++++-
 .../boot/dts/renesas/r9a08g046l48-smarc.dts   |  89 +++++++
 .../boot/dts/renesas/rzg3l-smarc-som.dtsi     | 199 +++++++++++++++
 drivers/clk/renesas/r9a08g046-cpg.c           |  92 +++++++
 drivers/mmc/host/renesas_sdhi.h               |  25 +-
 drivers/mmc/host/renesas_sdhi_core.c          | 226 +++++++++++++-----
 drivers/mmc/host/renesas_sdhi_internal_dmac.c |  71 +++++-
 drivers/mmc/host/renesas_sdhi_sys_dmac.c      |  67 ++++--
 drivers/pinctrl/renesas/pinctrl-rzg2l.c       |  74 ++++--
 10 files changed, 889 insertions(+), 128 deletions(-)

-- 
2.43.0

[PATCH 01/17] dt-bindings: mmc: renesas,sdhi: Document RZ/G3L (r9a08g046) SoC

[Biju]

From: Biju Das <biju.das.jz@bp.renesas.com>

Document the RZ/G3L (r9a08g046) SDHI controller. The RZ/G3L SDHI
controller is similar to RZ/G2L but has five clocks (core, clkh,
cd, aclk, aclkm) and three resets (rst, axim, axis), so update the
clocks/clock-names maximum to 5 and resets/reset-names maximum to 3.
It has an internal divider for all modes except HS400, and a 2048-bit
divider compared to 512 on others.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
 .../devicetree/bindings/mmc/renesas,sdhi.yaml | 101 +++++++++++++-----
 1 file changed, 75 insertions(+), 26 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/renesas,sdhi.yaml b/Documentation/devicetree/bindings/mmc/renesas,sdhi.yaml
index 4d66966ce290..16cb395403f6 100644
--- a/Documentation/devicetree/bindings/mmc/renesas,sdhi.yaml
+++ b/Documentation/devicetree/bindings/mmc/renesas,sdhi.yaml
@@ -18,6 +18,7 @@ properties:
           - renesas,sdhi-r7s9210 # SH-Mobile AG5
           - renesas,sdhi-r8a73a4 # R-Mobile APE6
           - renesas,sdhi-r8a7740 # R-Mobile A1
+          - renesas,sdhi-r9a08g046 # RZ/G3L
           - renesas,sdhi-r9a09g057 # RZ/V2H(P)
           - renesas,sdhi-sh73a0  # R-Mobile APE6
       - items:
@@ -86,11 +87,11 @@ properties:
 
   clocks:
     minItems: 1
-    maxItems: 4
+    maxItems: 5
 
   clock-names:
     minItems: 1
-    maxItems: 4
+    maxItems: 5
 
   dmas:
     minItems: 4
@@ -116,7 +117,12 @@ properties:
     maxItems: 1
 
   resets:
-    maxItems: 1
+    minItems: 1
+    maxItems: 3
+
+  reset-names:
+    minItems: 1
+    maxItems: 3
 
   pinctrl-0:
     minItems: 1
@@ -155,60 +161,101 @@ allOf:
         properties:
           compatible:
             contains:
-              enum:
-                - renesas,sdhi-r9a09g057
-                - renesas,rzg2l-sdhi
+              const: renesas,sdhi-r9a08g046
       then:
         properties:
           clocks:
             items:
               - description: IMCLK, SDHI channel main clock1.
               - description: CLK_HS, SDHI channel High speed clock which operates
-                             4 times that of SDHI channel main clock1.
+                             2 times that of SDHI channel main clock1.
               - description: IMCLK2, SDHI channel main clock2. When this clock is
                              turned off, external SD card detection cannot be
                              detected.
-              - description: ACLK, SDHI channel bus clock.
+              - description: ACLK/IACLKS, SDHI channel bus clock.
+              - description: IACLKM, SDHI channel bus clock m.
           clock-names:
             items:
               - const: core
               - const: clkh
               - const: cd
               - const: aclk
+              - const: aclkm
+          resets:
+            items:
+              - description: rst, Core reset.
+              - description: axim, SDHI axi bus reset m.
+              - description: axis, SDHI axi bus reset s.
+          reset-names:
+            items:
+              - const: rst
+              - const: axim
+              - const: axis
         required:
           - clock-names
           - resets
+          - reset-names
       else:
         if:
           properties:
             compatible:
               contains:
                 enum:
-                  - renesas,rcar-gen2-sdhi
-                  - renesas,rcar-gen3-sdhi
-                  - renesas,rcar-gen4-sdhi
+                  - renesas,sdhi-r9a09g057
+                  - renesas,rzg2l-sdhi
         then:
           properties:
             clocks:
-              minItems: 1
-              maxItems: 3
-            clock-names:
-              minItems: 1
-              uniqueItems: true
               items:
-                - const: core
-                - enum: [ clkh, cd ]
-                - const: cd
-        else:
-          properties:
-            clocks:
-              minItems: 1
-              maxItems: 2
+                - description: IMCLK, SDHI channel main clock1.
+                - description: CLK_HS, SDHI channel High speed clock which operates
+                               4 times that of SDHI channel main clock1.
+                - description: IMCLK2, SDHI channel main clock2. When this clock is
+                               turned off, external SD card detection cannot be
+                               detected.
+                - description: ACLK, SDHI channel bus clock.
             clock-names:
-              minItems: 1
               items:
                 - const: core
+                - const: clkh
                 - const: cd
+                - const: aclk
+            resets:
+              maxItems: 1
+          required:
+            - clock-names
+            - resets
+        else:
+          if:
+            properties:
+              compatible:
+                contains:
+                  enum:
+                    - renesas,rcar-gen2-sdhi
+                    - renesas,rcar-gen3-sdhi
+                    - renesas,rcar-gen4-sdhi
+          then:
+            properties:
+              clocks:
+                minItems: 1
+                maxItems: 3
+              clock-names:
+                minItems: 1
+                uniqueItems: true
+                items:
+                  - const: core
+                  - enum: [ clkh, cd ]
+                  - const: cd
+          else:
+            properties:
+              clocks:
+                minItems: 1
+                maxItems: 2
+              clock-names:
+                minItems: 1
+                items:
+                  - const: core
+                  - const: cd
 
   - if:
       properties:
@@ -247,7 +294,9 @@ allOf:
       properties:
         compatible:
           contains:
-            const: renesas,sdhi-r9a09g057
+            enum:
+              - renesas,sdhi-r9a08g046
+              - renesas,sdhi-r9a09g057
     then:
       properties:
         vqmmc-regulator:
-- 
2.43.0

Re: [PATCH 01/17] dt-bindings: mmc: renesas,sdhi: Document RZ/G3L (r9a08g046) SoC

[Conor Dooley]

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Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

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Re: [PATCH 00/17] Add Renesas RZ/G3L SD/eMMC support

[Wolfram Sang]

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On Sat, May 30, 2026 at 05:07:54PM +0100, Biju wrote:
> From: Biju Das <biju.das.jz@bp.renesas.com>
> 
> RZ/G3L SoC has:
> 
> Channel 0 supports SD and eMMC (including HS400/HS400ES).
> Channel 1 supports SD and eMMC (except for HS400).
> Channel 2 supports SD.
> 
> The SoC supports a maximum frequency of 150 MHz. The SD0 interface does
> not support IOVS and PWEN in the SDHI register (no internal regulator),
> unlike SD1 and SD2. It has an internal divider for all modes except HS400.
> It also has a 2048-bit divider compared to 512 on others. Moreover
> RZ/G3L supports HS400 enhanced strobe mode.

Sigh, so many HW changes again...

I want to review it but I won't have time before the next merge window
ends. In the meantime, could you resend the series properly in just one
thread, please? From patch 14 on, it gets messy...


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RE: [PATCH 00/17] Add Renesas RZ/G3L SD/eMMC support

[Biju Das]

Hi Wolfram,

Thanks for the feedback.

> -----Original Message-----
> From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Sent: 02 June 2026 22:02
> Subject: Re: [PATCH 00/17] Add Renesas RZ/G3L SD/eMMC support
> 
> On Sat, May 30, 2026 at 05:07:54PM +0100, Biju wrote:
> > From: Biju Das <biju.das.jz@bp.renesas.com>
> >
> > RZ/G3L SoC has:
> >
> > Channel 0 supports SD and eMMC (including HS400/HS400ES).
> > Channel 1 supports SD and eMMC (except for HS400).
> > Channel 2 supports SD.
> >
> > The SoC supports a maximum frequency of 150 MHz. The SD0 interface
> > does not support IOVS and PWEN in the SDHI register (no internal
> > regulator), unlike SD1 and SD2. It has an internal divider for all modes except HS400.
> > It also has a 2048-bit divider compared to 512 on others. Moreover
> > RZ/G3L supports HS400 enhanced strobe mode.
> 
> Sigh, so many HW changes again...
> 
> I want to review it but I won't have time before the next merge window ends. In the meantime, could
> you resend the series properly in just one thread, please? From patch 14 on, it gets messy...


Sorry about that. I will send v2 with tags collected for binding patch.

Cheers,
Biju