| From: |
| Albert Yang <yangzh0906-AT-thundersoft.com> |
| To: |
| Ulf Hansson <ulf.hansson-AT-linaro.org>, Adrian Hunter <adrian.hunter-AT-intel.com>, Rob Herring <robh-AT-kernel.org>, Krzysztof Kozlowski <krzk+dt-AT-kernel.org>, Conor Dooley <conor+dt-AT-kernel.org>, Ge Gordon <gordon.ge-AT-bst.ai>, Arnd Bergmann <arnd-AT-arndb.de> |
| Subject: |
| [PATCH v5 0/6] mmc: add support for BST C1200 SDHCI controller |
| Date: |
| Fri, 23 Jan 2026 17:53:36 +0800 |
| Message-ID: |
| <20260123095342.272505-1-yangzh0906@thundersoft.com> |
| Cc: |
| BST Linux Kernel Upstream Group <bst-upstream-AT-bstai.top>, linux-mmc-AT-vger.kernel.org, devicetree-AT-vger.kernel.org, linux-arm-kernel-AT-lists.infradead.org, linux-kernel-AT-vger.kernel.org, Albert Yang <yangzh0906-AT-thundersoft.com> |
| Archive-link: |
| Article |
This series adds MMC/eMMC controller support for Black Sesame Technologies
C1200 SoC. BST is a leading automotive-grade computing SoC provider focusing
on intelligent driving, computer vision, and AI capabilities for ADAS and
autonomous driving applications. More information: https://bst.ai
== Background ==
This is the MMC portion split from the original v4 series [1] following
feedback from Arnd Bergmann [2]. The platform support (vendor-prefix,
SoC bindings, Kconfig ARCH_BST, base DTS, defconfig ARCH_BST) has already
been merged into Linux 6.19 through the SoC tree [3].
== Series Overview ==
Patch 1: dt-bindings: mmc: add binding for BST DWCMSHC SDHCI controller
Patch 2: mmc: sdhci: allow drivers to pre-allocate bounce buffer
Patch 3: mmc: sdhci: add Black Sesame Technologies BST C1200 controller driver
Patch 4: arm64: dts: bst: enable eMMC controller in C1200 CDCU1.0 board
Patch 5: arm64: defconfig: enable BST SDHCI controller
Patch 6: MAINTAINERS: add MMC files to BST entry
== Testing ==
- checkpatch.pl: PASS (all patches)
- dt_binding_check: PASS
- dtbs_check (CHECK_DTBS=y): PASS
- Build tested with ARCH=arm64 defconfig
== Changes since v4 ==
- Split: Platform patches merged separately via SoC tree; this series is
MMC-only, submitted to MMC maintainers
DT binding (patch 1):
- Rename file from bst,dwcmshc-sdhci.yaml to bst,c1200-sdhci.yaml
- Fix example compatible string to match property definition
Driver (patch 3):
- Fix compatible string to match dt-bindings (bst,c1200-sdhci)
- Simplify clock divider calculation with clearer frequency range logic
- Add linux/bits.h and linux/bitfield.h headers
- Remove unused linux/ioport.h header
- Rename SDHCI_TUNING_COUNT to BST_TUNING_COUNT
- Rename BST_EMMC_CTRL_BIT2 to BST_EMMC_CTRL_RST_N
- Fix BST_DEFAULT_MAX_FREQ from 2MHz to 200MHz
- Convert kernel-doc to regular comments (per Adrian Hunter)
- Add sdhci_bst_free_bounce_buffer() helper (per Adrian Hunter)
== References ==
[1] v4: https://lore.kernel.org/lkml/20250923-v4-patch-final-v1-0...
[2] Split: https://lore.kernel.org/lkml/09b1318e-21dc-4354-8733-866b...
[3] Merged via soc-newsoc-6.19
Albert Yang (6):
dt-bindings: mmc: add binding for BST DWCMSHC SDHCI controller
mmc: sdhci: allow drivers to pre-allocate bounce buffer
mmc: sdhci: add Black Sesame Technologies BST C1200 controller driver
arm64: dts: bst: enable eMMC controller in C1200 CDCU1.0 board
arm64: defconfig: enable BST SDHCI controller
MAINTAINERS: add MMC files to BST entry
.../bindings/mmc/bst,c1200-sdhci.yaml | 70 +++
MAINTAINERS | 2 +
.../dts/bst/bstc1200-cdcu1.0-adas_4c2g.dts | 19 +
arch/arm64/boot/dts/bst/bstc1200.dtsi | 18 +
arch/arm64/configs/defconfig | 1 +
drivers/mmc/host/Kconfig | 14 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sdhci-of-bst.c | 521 ++++++++++++++++++
drivers/mmc/host/sdhci.c | 7 +
9 files changed, 653 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mmc/bst,c1200-sdhci.yaml
create mode 100644 drivers/mmc/host/sdhci-of-bst.c
base-commit: 0f61b1860cc3f52aef9036d7235ed1f017632193
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2.43.0
