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[v2,0/3] StarFive's SDIO/eMMC driver support

Message ID 20221227122227.460921-1-william.qiu@starfivetech.com
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Series StarFive's SDIO/eMMC driver support | expand

Message

William Qiu Dec. 27, 2022, 12:22 p.m. UTC
Hi,

This patchset adds initial rudimentary support for the StarFive
designware mobile storage host controller driver. And this driver will
be used in StarFive's VisionFive 2 board. The main purpose of adding
this driver is to accommodate the ultra-high speed mode of eMMC.

The last patch should be applied after the patchset [1]:
[1] https://lore.kernel.org/all/20221118011714.70877-1-hal.feng@starfivetech.com/

Changes since v1:
- Renamed the dt-binding 'starfive,jh7110-sdio.yaml' to 'starfive,jh7110-mmc.yaml'.
- Changed the type of 'starfive,syscon' and modify its description.
- Deleted unused head files like '#include <linux/gpio.h>'.
- Added comment for the 'rise_point' and 'fall_point'.
- Changed the API 'num_caps' to 'common_caps'.
- Changed the node name 'sys_syscon' to 'syscon'.
- Changed the node name 'sdio' to 'mmc'.

The patch series is based on v6.1-rc5.

William Qiu (3):
  dt-bindings: mmc: Add bindings for StarFive
  mmc: starfive: Add sdio/emmc driver support
  riscv: dts: starfive: Add mmc node

 .../bindings/mmc/starfive,jh7110-mmc.yaml     |  72 +++++++
 MAINTAINERS                                   |   6 +
 .../jh7110-starfive-visionfive-v2.dts         |  25 +++
 arch/riscv/boot/dts/starfive/jh7110.dtsi      |  38 ++++
 drivers/mmc/host/Kconfig                      |  10 +
 drivers/mmc/host/Makefile                     |   1 +
 drivers/mmc/host/dw_mmc-starfive.c            | 185 ++++++++++++++++++
 7 files changed, 337 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
 create mode 100644 drivers/mmc/host/dw_mmc-starfive.c

--
2.34.1

Comments

William Qiu Dec. 28, 2022, 10:40 a.m. UTC | #1
On 2022/12/27 21:05, Krzysztof Kozlowski wrote:
> On 27/12/2022 13:22, William Qiu wrote:
>> Add documentation to describe StarFive
>> designware mobile storage host controller driver.
> 
> Please wrap commit message according to Linux coding style / submission
> process (neither too early nor over the limit):
> https://elixir.bootlin.com/linux/v5.18-rc4/source/Documentation/process/submitting-patches.rst#L586
> 
> The subject is a bit redundant and not precise. No need to mention
> "bindings" twice but "StarFive" is really too generic. Do you add now
> all possible devices from StarFive? I see only one. Rephrase (use git
> log to find examples).
> 

Will update

>> 
>> Signed-off-by: William Qiu <william.qiu@starfivetech.com>
>> ---
>>  .../bindings/mmc/starfive,jh7110-mmc.yaml     | 72 +++++++++++++++++++
>>  1 file changed, 72 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
>> 
>> diff --git a/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml b/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
>> new file mode 100644
>> index 000000000000..430dd5f24933
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
>> @@ -0,0 +1,72 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mmc/starfive,jh7110-mmc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: StarFive Designware Mobile Storage Host Controller
>> +
>> +description:
>> +  StarFive uses the Synopsys designware mobile storage host controller
>> +  to interface a SoC with storage medium such as eMMC or SD/MMC cards.
>> +
>> +allOf:
>> +  - $ref: synopsys-dw-mshc-common.yaml#
>> +
>> +maintainers:
>> +  - William Qiu <william.qiu@starfivetech.com>
>> +
>> +properties:
>> +  compatible:
>> +    const: starfive,jh7110-mmc
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    items:
>> +      - description: biu clock
>> +      - description: ciu clock
>> +
>> +  clock-names:
>> +    items:
>> +      - const: biu
>> +      - const: ciu
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  starfive,syscon:
> 
> Name is not specific enough. What is syscon? Any syscon? This needs to
> be specific.
> 

Will update.

>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>> +    description:
>> +      arg0:arg0 is syscon.
> 
> What is syscon?
> 

Will update.

>> +      arg1:arg1 is syscon register offset, used to enable MMC function.
> 
> Describe the argument, not what it is used for, e.g. "offset of XXX YYY ZZZ"
> 
>> +      arg2:arg2 is used to enable the register shift of the MMC function.
>> +      arg3:arg3 is used to enable the register mask of the MMC function.
> 
> That's not how the phandle array is described. Instead:
> 
> https://elixir.bootlin.com/linux/v5.18-rc1/source/Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml#L42
> 

Hi Krzysztof,

Thank you for taking time to review and provide helpful comments for this patch.
I will fix all the above issues in the next version.

Best Regards,
William Qiu

> 
> 
> Best regards,
> Krzysztof
>
William Qiu Jan. 6, 2023, 8:44 a.m. UTC | #2
On 2022/12/27 20:22, William Qiu wrote:
> Hi,
> 
> This patchset adds initial rudimentary support for the StarFive
> designware mobile storage host controller driver. And this driver will
> be used in StarFive's VisionFive 2 board. The main purpose of adding
> this driver is to accommodate the ultra-high speed mode of eMMC.
> 
> The last patch should be applied after the patchset [1]:
> [1] https://lore.kernel.org/all/20221118011714.70877-1-hal.feng@starfivetech.com/
> 
> Changes since v1:
> - Renamed the dt-binding 'starfive,jh7110-sdio.yaml' to 'starfive,jh7110-mmc.yaml'.
> - Changed the type of 'starfive,syscon' and modify its description.
> - Deleted unused head files like '#include <linux/gpio.h>'.
> - Added comment for the 'rise_point' and 'fall_point'.
> - Changed the API 'num_caps' to 'common_caps'.
> - Changed the node name 'sys_syscon' to 'syscon'.
> - Changed the node name 'sdio' to 'mmc'.
> 
> The patch series is based on v6.1-rc5.
> 
> William Qiu (3):
>   dt-bindings: mmc: Add bindings for StarFive
>   mmc: starfive: Add sdio/emmc driver support
>   riscv: dts: starfive: Add mmc node
> 
>  .../bindings/mmc/starfive,jh7110-mmc.yaml     |  72 +++++++
>  MAINTAINERS                                   |   6 +
>  .../jh7110-starfive-visionfive-v2.dts         |  25 +++
>  arch/riscv/boot/dts/starfive/jh7110.dtsi      |  38 ++++
>  drivers/mmc/host/Kconfig                      |  10 +
>  drivers/mmc/host/Makefile                     |   1 +
>  drivers/mmc/host/dw_mmc-starfive.c            | 185 ++++++++++++++++++
>  7 files changed, 337 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
>  create mode 100644 drivers/mmc/host/dw_mmc-starfive.c
> 
> --
> 2.34.1
> 

Hi Rob/Jaehoon,

Could you please help to review and provide comments on this patch series?
Thank you in advance.

Best regards,
William Qiu