| Message ID | cover.1746581751.git.zhoubinbin@loongson.cn |
|---|---|
| Headers | show |
| Series | LoongArch: Introduce the Loongson-2K MMC host controller driver | expand |
On Wed, May 07, 2025 at 03:28:05PM +0800, Binbin Zhou wrote: > Add the Loongson-2K SoC's SD/SDIO/eMMC controller binding with DT schema > format using json-schema. > > Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> > --- > .../bindings/mmc/loongson,ls2k-mmc.yaml | 69 +++++++++++++++++++ > MAINTAINERS | 6 ++ > 2 files changed, 75 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mmc/loongson,ls2k-mmc.yaml > > diff --git a/Documentation/devicetree/bindings/mmc/loongson,ls2k-mmc.yaml b/Documentation/devicetree/bindings/mmc/loongson,ls2k-mmc.yaml > new file mode 100644 > index 000000000000..97a0853399f1 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mmc/loongson,ls2k-mmc.yaml > @@ -0,0 +1,69 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mmc/loongson,ls2k-mmc.yaml# Filename matching a compatible please. Otherwise this looks okay to me. > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: The SD/SDIO/eMMC host controller for Loongson-2K family SoCs > + > +description: > + The MMC host controller on the Loongson-2K0500/2K1000 (using an externally > + shared apbdma controller) provides the SD and SDIO device interfaces. > + > +maintainers: > + - Binbin Zhou <zhoubinbin@loongson.cn> > + > +allOf: > + - $ref: mmc-controller.yaml# > + > +properties: > + compatible: > + enum: > + - loongson,ls2k0500-mmc > + - loongson,ls2k1000-mmc > + > + reg: > + items: > + - description: Loongson-2K MMC controller registers. > + - description: APB DMA config register for Loongson-2K MMC controller. > + > + interrupts: > + maxItems: 1 > + > + clocks: > + maxItems: 1 > + > + dmas: > + maxItems: 1 > + > + dma-names: > + const: rx-tx > + > +required: > + - compatible > + - reg > + - interrupts > + - clocks > + - dmas > + - dma-names > + > +unevaluatedProperties: false > + > +examples: > + - | > + #include <dt-bindings/gpio/gpio.h> > + #include <dt-bindings/interrupt-controller/irq.h> > + #include <dt-bindings/clock/loongson,ls2k-clk.h> > + > + mmc@1fe2c000 { > + compatible = "loongson,ls2k1000-mmc"; > + reg = <0x1fe2c000 0x68>, > + <0x1fe00438 0x8>; > + interrupt-parent = <&liointc0>; > + interrupts = <31 IRQ_TYPE_LEVEL_HIGH>; > + clocks = <&clk LOONGSON2_APB_CLK>; > + dmas = <&apbdma1 0>; > + dma-names = "rx-tx"; > + bus-width = <4>; > + cd-gpios = <&gpio0 22 GPIO_ACTIVE_LOW>; > + }; > diff --git a/MAINTAINERS b/MAINTAINERS > index 96b827049501..5bf74aa63299 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -13935,6 +13935,12 @@ S: Maintained > F: Documentation/devicetree/bindings/hwinfo/loongson,ls2k-chipid.yaml > F: drivers/soc/loongson/loongson2_guts.c > > +LOONGSON-2 SOC SERIES MMC/SD/SDIO CONTROLLER DRIVER > +M: Binbin Zhou <zhoubinbin@loongson.cn> > +L: linux-mmc@vger.kernel.org > +S: Maintained > +F: Documentation/devicetree/bindings/mmc/loongson,ls2k-mmc.yaml > + > LOONGSON-2 SOC SERIES PM DRIVER > M: Yinbo Zhu <zhuyinbo@loongson.cn> > L: linux-pm@vger.kernel.org > -- > 2.47.1 >
Hi all: This patchset introduce the MMC host controller on Loongson-2K series CPUs. They are similar, except for the interface characteristics and the use of DMA engine, specifically, the Loongson-2K0500/Loongson-2K1000 use an externally shared APBDMA engine, while the Loongson-2K2000 uses an internally exclusive DMA. Based on this, I'm splitting the driver into two patches. List of the patchset: Patch1: bindings for Loongson-2K0500/Loongson-2K1000; Patch2: driver for MMC controller using externally shared APBDMA engine; Patch3: bindings for Loongson-2K2000; Patch4: driver for MMC controller using internally exclusive DMA. Thanks. ------- V2: patch(1/4): - Add reg define for each reg entry. patch(2/4): - Put all code in the c-file; - Use mmc_from_priv() instead of host->mmc; - Use sdio_signal_irq() instead of mmc_signal_sdio_irq(); - Use devm_mmc_alloc_host() instead of mmc_alloc_host(); - Use mmc_regulator_get_supply(); patch(4/4): - Add fix_cmd_interrupt function which is needed by Loongson-2K2000. Link to V1: https://lore.kernel.org/linux-mmc/cover.1744273956.git.zhoubinbin@loongson.cn/ Binbin Zhou (4): dt-bindings: mmc: Add Loongson-2K SD/SDIO/eMMC controller binding mmc: loongson2: Add Loongson-2K SD/SDIO controller driver dt-bindings: mmc: loongson,ls2k-mmc: Add compatible for Loongson-2K2000 mmc: loongson2: Add Loongson-2K2000 SD/SDIO/eMMC controller driver .../bindings/mmc/loongson,ls2k-mmc.yaml | 112 ++ MAINTAINERS | 7 + drivers/mmc/host/Kconfig | 13 + drivers/mmc/host/Makefile | 1 + drivers/mmc/host/loongson2-mmc.c | 1007 +++++++++++++++++ 5 files changed, 1140 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/loongson,ls2k-mmc.yaml create mode 100644 drivers/mmc/host/loongson2-mmc.c base-commit: 9e12816f9a6195f1f5b7c5dc2e388c2458411b97