* [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension
@ 2018-04-20 17:32 Liming Sun
2018-04-20 17:32 ` [PATCH 2/2] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
2018-04-23 9:31 ` [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension Ulf Hansson
0 siblings, 2 replies; 4+ messages in thread
From: Liming Sun @ 2018-04-20 17:32 UTC (permalink / raw)
To: Ulf Hansson, Rob Herring, Mark Rutland, Jaehoon Chung,
Catalin Marinas, Will Deacon
Cc: Liming Sun, linux-mmc, devicetree, linux-kernel
This commit adds extension to the dw_mmc driver for Mellanox BlueField
SoC. It updates the UHS_REG_EXT register to bring up the eMMC card on
this SoC.
Signed-off-by: Liming Sun <lsun@mellanox.com>
---
.../devicetree/bindings/mmc/bluefield-dw-mshc.txt | 29 +++++++++
drivers/mmc/host/Kconfig | 9 +++
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/dw_mmc-bluefield.c | 72 ++++++++++++++++++++++
4 files changed, 111 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt
create mode 100644 drivers/mmc/host/dw_mmc-bluefield.c
diff --git a/Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt
new file mode 100644
index 0000000..ee0dd61
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt
@@ -0,0 +1,29 @@
+* Mellanox Bluefield SoC specific extensions to the Synopsys Designware
+ Mobile Storage Host Controller
+
+Read synopsys-dw-mshc.txt for more details
+
+The Synopsys designware mobile storage host controller is used to interface
+a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
+differences between the core Synopsys dw mshc controller properties described
+by synopsys-dw-mshc.txt and the properties used by the Mellanox Bluefield SoC
+specific extensions to the Synopsys Designware Mobile Storage Host Controller.
+
+Required Properties:
+
+* compatible: should be one of the following.
+ - "mellanox,bluefield-dw-mshc": for controllers with Mellanox Bluefield SoC
+ specific extensions.
+
+Example:
+
+ /* Mellanox Bluefield SoC MMC */
+ dwmmc0@4,0 {
+ compatible = "mellanox,bluefield-dw-mshc";
+ reg = <4 0x8000 0x400>;
+ interrupts = <32>;
+ fifo-depth = <0x100>;
+ clock-frequency = <24000000>;
+ bus-width = <8>;
+ cap-mmc-highspeed;
+ };
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 9589f9c..26ac6b5 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -717,6 +717,15 @@ config MMC_DW_K3
Synopsys DesignWare Memory Card Interface driver. Select this option
for platforms based on Hisilicon K3 SoC's.
+config MMC_DW_BLUEFIELD
+ tristate "BlueField specific extensions for Synopsys DW Memory Card Interface"
+ depends on MMC_DW
+ select MMC_DW_PLTFM
+ help
+ This selects support for Mellanox BlueField SoC specific extensions to
+ the Synopsys DesignWare Memory Card Interface driver. Select this
+ option for platforms based on Mellanox BlueField SoC's.
+
config MMC_DW_PCI
tristate "Synopsys Designware MCI support on PCI bus"
depends on MMC_DW && PCI
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 6aead24..267b3f1 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_MMC_DW_K3) += dw_mmc-k3.o
obj-$(CONFIG_MMC_DW_PCI) += dw_mmc-pci.o
obj-$(CONFIG_MMC_DW_ROCKCHIP) += dw_mmc-rockchip.o
obj-$(CONFIG_MMC_DW_ZX) += dw_mmc-zx.o
+obj-$(CONFIG_MMC_DW_BLUEFIELD) += dw_mmc-bluefield.o
obj-$(CONFIG_MMC_SH_MMCIF) += sh_mmcif.o
obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
obj-$(CONFIG_MMC_VUB300) += vub300.o
diff --git a/drivers/mmc/host/dw_mmc-bluefield.c b/drivers/mmc/host/dw_mmc-bluefield.c
new file mode 100644
index 0000000..12067b1
--- /dev/null
+++ b/drivers/mmc/host/dw_mmc-bluefield.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Mellanox Technologies.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/of.h>
+
+#include "dw_mmc.h"
+#include "dw_mmc-pltfm.h"
+
+static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios)
+{
+ u32 regs;
+
+ /* Set drive=4 (bit 29:23) and sample=2 (bit 22:16) in UHS_REG_EXT. */
+ regs = mci_readl(host, UHS_REG_EXT);
+ regs = (regs & ~0x3F100000 & ~0x7F0000) | (4 << 23) | (2 << 16);
+ mci_writel(host, UHS_REG_EXT, regs);
+}
+
+static const struct dw_mci_drv_data bluefield_drv_data = {
+ .set_ios = dw_mci_bluefield_set_ios
+};
+
+static const struct of_device_id dw_mci_bluefield_match[] = {
+ { .compatible = "mellanox,bluefield-dw-mshc",
+ .data = &bluefield_drv_data },
+ {},
+};
+MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
+
+static int dw_mci_bluefield_probe(struct platform_device *pdev)
+{
+ const struct dw_mci_drv_data *drv_data = NULL;
+ const struct of_device_id *match;
+
+ if (pdev->dev.of_node) {
+ match = of_match_node(dw_mci_bluefield_match,
+ pdev->dev.of_node);
+ drv_data = match->data;
+ }
+
+ return dw_mci_pltfm_register(pdev, drv_data);
+}
+
+static struct platform_driver dw_mci_bluefield_pltfm_driver = {
+ .probe = dw_mci_bluefield_probe,
+ .remove = dw_mci_pltfm_remove,
+ .driver = {
+ .name = "dwmmc_bluefield",
+ .of_match_table = dw_mci_bluefield_match,
+ .pm = &dw_mci_pltfm_pmops,
+ },
+};
+
+module_platform_driver(dw_mci_bluefield_pltfm_driver);
+
+MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
+MODULE_AUTHOR("Mellanox Technologies");
+MODULE_LICENSE("GPL v2");
--
1.8.3.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] arm64: defconfig: Enable dw_mmc-bluefield driver
2018-04-20 17:32 [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension Liming Sun
@ 2018-04-20 17:32 ` Liming Sun
2018-04-23 9:31 ` [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension Ulf Hansson
1 sibling, 0 replies; 4+ messages in thread
From: Liming Sun @ 2018-04-20 17:32 UTC (permalink / raw)
To: Ulf Hansson, Rob Herring, Mark Rutland, Jaehoon Chung,
Catalin Marinas, Will Deacon
Cc: Liming Sun, linux-mmc, devicetree, linux-kernel
This patch updates arm64 defconfig to enable dw_mmc-bluefield,
which is a driver extension of Synopsys Designware MMC for the
Mellanox BlueField Soc.
Signed-off-by: Liming Sun <lsun@mellanox.com>
---
arch/arm64/configs/defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index ecf6137..43464ab 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -487,6 +487,7 @@ CONFIG_MMC_DW=y
CONFIG_MMC_DW_EXYNOS=y
CONFIG_MMC_DW_K3=y
CONFIG_MMC_DW_ROCKCHIP=y
+CONFIG_MMC_DW_BLUEFIELD=y
CONFIG_MMC_SUNXI=y
CONFIG_MMC_BCM2835=y
CONFIG_MMC_SDHCI_XENON=y
--
1.8.3.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension
2018-04-20 17:32 [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension Liming Sun
2018-04-20 17:32 ` [PATCH 2/2] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
@ 2018-04-23 9:31 ` Ulf Hansson
2018-04-23 15:17 ` Liming Sun
1 sibling, 1 reply; 4+ messages in thread
From: Ulf Hansson @ 2018-04-23 9:31 UTC (permalink / raw)
To: Liming Sun
Cc: Rob Herring, Mark Rutland, Jaehoon Chung, Catalin Marinas,
Will Deacon, linux-mmc, devicetree, Linux Kernel Mailing List
On 20 April 2018 at 19:32, Liming Sun <lsun@mellanox.com> wrote:
> This commit adds extension to the dw_mmc driver for Mellanox BlueField
> SoC. It updates the UHS_REG_EXT register to bring up the eMMC card on
> this SoC.
>
> Signed-off-by: Liming Sun <lsun@mellanox.com>
> ---
> .../devicetree/bindings/mmc/bluefield-dw-mshc.txt | 29 +++++++++
Please move changes to DT docs into a separate patch.
Otherwise this looks good to me.
Kind regards
Uffe
> drivers/mmc/host/Kconfig | 9 +++
> drivers/mmc/host/Makefile | 1 +
> drivers/mmc/host/dw_mmc-bluefield.c | 72 ++++++++++++++++++++++
> 4 files changed, 111 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt
> create mode 100644 drivers/mmc/host/dw_mmc-bluefield.c
>
> diff --git a/Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt
> new file mode 100644
> index 0000000..ee0dd61
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt
> @@ -0,0 +1,29 @@
> +* Mellanox Bluefield SoC specific extensions to the Synopsys Designware
> + Mobile Storage Host Controller
> +
> +Read synopsys-dw-mshc.txt for more details
> +
> +The Synopsys designware mobile storage host controller is used to interface
> +a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
> +differences between the core Synopsys dw mshc controller properties described
> +by synopsys-dw-mshc.txt and the properties used by the Mellanox Bluefield SoC
> +specific extensions to the Synopsys Designware Mobile Storage Host Controller.
> +
> +Required Properties:
> +
> +* compatible: should be one of the following.
> + - "mellanox,bluefield-dw-mshc": for controllers with Mellanox Bluefield SoC
> + specific extensions.
> +
> +Example:
> +
> + /* Mellanox Bluefield SoC MMC */
> + dwmmc0@4,0 {
> + compatible = "mellanox,bluefield-dw-mshc";
> + reg = <4 0x8000 0x400>;
> + interrupts = <32>;
> + fifo-depth = <0x100>;
> + clock-frequency = <24000000>;
> + bus-width = <8>;
> + cap-mmc-highspeed;
> + };
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 9589f9c..26ac6b5 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -717,6 +717,15 @@ config MMC_DW_K3
> Synopsys DesignWare Memory Card Interface driver. Select this option
> for platforms based on Hisilicon K3 SoC's.
>
> +config MMC_DW_BLUEFIELD
> + tristate "BlueField specific extensions for Synopsys DW Memory Card Interface"
> + depends on MMC_DW
> + select MMC_DW_PLTFM
> + help
> + This selects support for Mellanox BlueField SoC specific extensions to
> + the Synopsys DesignWare Memory Card Interface driver. Select this
> + option for platforms based on Mellanox BlueField SoC's.
> +
> config MMC_DW_PCI
> tristate "Synopsys Designware MCI support on PCI bus"
> depends on MMC_DW && PCI
> diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> index 6aead24..267b3f1 100644
> --- a/drivers/mmc/host/Makefile
> +++ b/drivers/mmc/host/Makefile
> @@ -55,6 +55,7 @@ obj-$(CONFIG_MMC_DW_K3) += dw_mmc-k3.o
> obj-$(CONFIG_MMC_DW_PCI) += dw_mmc-pci.o
> obj-$(CONFIG_MMC_DW_ROCKCHIP) += dw_mmc-rockchip.o
> obj-$(CONFIG_MMC_DW_ZX) += dw_mmc-zx.o
> +obj-$(CONFIG_MMC_DW_BLUEFIELD) += dw_mmc-bluefield.o
> obj-$(CONFIG_MMC_SH_MMCIF) += sh_mmcif.o
> obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
> obj-$(CONFIG_MMC_VUB300) += vub300.o
> diff --git a/drivers/mmc/host/dw_mmc-bluefield.c b/drivers/mmc/host/dw_mmc-bluefield.c
> new file mode 100644
> index 0000000..12067b1
> --- /dev/null
> +++ b/drivers/mmc/host/dw_mmc-bluefield.c
> @@ -0,0 +1,72 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2018 Mellanox Technologies.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/io.h>
> +#include <linux/irq.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
> +#include <linux/mmc/host.h>
> +#include <linux/mmc/mmc.h>
> +#include <linux/of.h>
> +
> +#include "dw_mmc.h"
> +#include "dw_mmc-pltfm.h"
> +
> +static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios)
> +{
> + u32 regs;
> +
> + /* Set drive=4 (bit 29:23) and sample=2 (bit 22:16) in UHS_REG_EXT. */
> + regs = mci_readl(host, UHS_REG_EXT);
> + regs = (regs & ~0x3F100000 & ~0x7F0000) | (4 << 23) | (2 << 16);
> + mci_writel(host, UHS_REG_EXT, regs);
> +}
> +
> +static const struct dw_mci_drv_data bluefield_drv_data = {
> + .set_ios = dw_mci_bluefield_set_ios
> +};
> +
> +static const struct of_device_id dw_mci_bluefield_match[] = {
> + { .compatible = "mellanox,bluefield-dw-mshc",
> + .data = &bluefield_drv_data },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
> +
> +static int dw_mci_bluefield_probe(struct platform_device *pdev)
> +{
> + const struct dw_mci_drv_data *drv_data = NULL;
> + const struct of_device_id *match;
> +
> + if (pdev->dev.of_node) {
> + match = of_match_node(dw_mci_bluefield_match,
> + pdev->dev.of_node);
> + drv_data = match->data;
> + }
> +
> + return dw_mci_pltfm_register(pdev, drv_data);
> +}
> +
> +static struct platform_driver dw_mci_bluefield_pltfm_driver = {
> + .probe = dw_mci_bluefield_probe,
> + .remove = dw_mci_pltfm_remove,
> + .driver = {
> + .name = "dwmmc_bluefield",
> + .of_match_table = dw_mci_bluefield_match,
> + .pm = &dw_mci_pltfm_pmops,
> + },
> +};
> +
> +module_platform_driver(dw_mci_bluefield_pltfm_driver);
> +
> +MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
> +MODULE_AUTHOR("Mellanox Technologies");
> +MODULE_LICENSE("GPL v2");
> --
> 1.8.3.1
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension
2018-04-23 9:31 ` [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension Ulf Hansson
@ 2018-04-23 15:17 ` Liming Sun
0 siblings, 0 replies; 4+ messages in thread
From: Liming Sun @ 2018-04-23 15:17 UTC (permalink / raw)
To: Ulf Hansson
Cc: Rob Herring, Mark Rutland, Jaehoon Chung, Catalin Marinas,
Will Deacon, linux-mmc, devicetree, Linux Kernel Mailing List
Thanks Uffe. I'll submit patch 2 as suggested.
Best regards,
Liming
> -----Original Message-----
> From: Ulf Hansson [mailto:ulf.hansson@linaro.org]
> Sent: Monday, April 23, 2018 5:32 AM
> To: Liming Sun <lsun@mellanox.com>
> Cc: Rob Herring <robh+dt@kernel.org>; Mark Rutland
> <mark.rutland@arm.com>; Jaehoon Chung <jh80.chung@samsung.com>;
> Catalin Marinas <catalin.marinas@arm.com>; Will Deacon
> <will.deacon@arm.com>; linux-mmc@vger.kernel.org;
> devicetree@vger.kernel.org; Linux Kernel Mailing List <linux-
> kernel@vger.kernel.org>
> Subject: Re: [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension
>
> On 20 April 2018 at 19:32, Liming Sun <lsun@mellanox.com> wrote:
> > This commit adds extension to the dw_mmc driver for Mellanox BlueField
> > SoC. It updates the UHS_REG_EXT register to bring up the eMMC card on
> > this SoC.
> >
> > Signed-off-by: Liming Sun <lsun@mellanox.com>
> > ---
> > .../devicetree/bindings/mmc/bluefield-dw-mshc.txt | 29 +++++++++
>
> Please move changes to DT docs into a separate patch.
>
> Otherwise this looks good to me.
>
> Kind regards
> Uffe
>
> > drivers/mmc/host/Kconfig | 9 +++
> > drivers/mmc/host/Makefile | 1 +
> > drivers/mmc/host/dw_mmc-bluefield.c | 72
> ++++++++++++++++++++++
> > 4 files changed, 111 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/mmc/bluefield-
> dw-mshc.txt
> > create mode 100644 drivers/mmc/host/dw_mmc-bluefield.c
> >
> > diff --git a/Documentation/devicetree/bindings/mmc/bluefield-dw-
> mshc.txt b/Documentation/devicetree/bindings/mmc/bluefield-dw-
> mshc.txt
> > new file mode 100644
> > index 0000000..ee0dd61
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/mmc/bluefield-dw-mshc.txt
> > @@ -0,0 +1,29 @@
> > +* Mellanox Bluefield SoC specific extensions to the Synopsys Designware
> > + Mobile Storage Host Controller
> > +
> > +Read synopsys-dw-mshc.txt for more details
> > +
> > +The Synopsys designware mobile storage host controller is used to
> interface
> > +a SoC with storage medium such as eMMC or SD/MMC cards. This file
> documents
> > +differences between the core Synopsys dw mshc controller properties
> described
> > +by synopsys-dw-mshc.txt and the properties used by the Mellanox
> Bluefield SoC
> > +specific extensions to the Synopsys Designware Mobile Storage Host
> Controller.
> > +
> > +Required Properties:
> > +
> > +* compatible: should be one of the following.
> > + - "mellanox,bluefield-dw-mshc": for controllers with Mellanox Bluefield
> SoC
> > + specific extensions.
> > +
> > +Example:
> > +
> > + /* Mellanox Bluefield SoC MMC */
> > + dwmmc0@4,0 {
> > + compatible = "mellanox,bluefield-dw-mshc";
> > + reg = <4 0x8000 0x400>;
> > + interrupts = <32>;
> > + fifo-depth = <0x100>;
> > + clock-frequency = <24000000>;
> > + bus-width = <8>;
> > + cap-mmc-highspeed;
> > + };
> > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> > index 9589f9c..26ac6b5 100644
> > --- a/drivers/mmc/host/Kconfig
> > +++ b/drivers/mmc/host/Kconfig
> > @@ -717,6 +717,15 @@ config MMC_DW_K3
> > Synopsys DesignWare Memory Card Interface driver. Select this
> option
> > for platforms based on Hisilicon K3 SoC's.
> >
> > +config MMC_DW_BLUEFIELD
> > + tristate "BlueField specific extensions for Synopsys DW Memory Card
> Interface"
> > + depends on MMC_DW
> > + select MMC_DW_PLTFM
> > + help
> > + This selects support for Mellanox BlueField SoC specific extensions to
> > + the Synopsys DesignWare Memory Card Interface driver. Select this
> > + option for platforms based on Mellanox BlueField SoC's.
> > +
> > config MMC_DW_PCI
> > tristate "Synopsys Designware MCI support on PCI bus"
> > depends on MMC_DW && PCI
> > diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
> > index 6aead24..267b3f1 100644
> > --- a/drivers/mmc/host/Makefile
> > +++ b/drivers/mmc/host/Makefile
> > @@ -55,6 +55,7 @@ obj-$(CONFIG_MMC_DW_K3) += dw_mmc-
> k3.o
> > obj-$(CONFIG_MMC_DW_PCI) += dw_mmc-pci.o
> > obj-$(CONFIG_MMC_DW_ROCKCHIP) += dw_mmc-rockchip.o
> > obj-$(CONFIG_MMC_DW_ZX) += dw_mmc-zx.o
> > +obj-$(CONFIG_MMC_DW_BLUEFIELD) += dw_mmc-bluefield.o
> > obj-$(CONFIG_MMC_SH_MMCIF) += sh_mmcif.o
> > obj-$(CONFIG_MMC_JZ4740) += jz4740_mmc.o
> > obj-$(CONFIG_MMC_VUB300) += vub300.o
> > diff --git a/drivers/mmc/host/dw_mmc-bluefield.c
> b/drivers/mmc/host/dw_mmc-bluefield.c
> > new file mode 100644
> > index 0000000..12067b1
> > --- /dev/null
> > +++ b/drivers/mmc/host/dw_mmc-bluefield.c
> > @@ -0,0 +1,72 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (C) 2018 Mellanox Technologies.
> > + *
> > + * This program is free software; you can redistribute it and/or modify
> > + * it under the terms of the GNU General Public License as published by
> > + * the Free Software Foundation; either version 2 of the License, or
> > + * (at your option) any later version.
> > + */
> > +
> > +#include <linux/module.h>
> > +#include <linux/io.h>
> > +#include <linux/irq.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/pm_runtime.h>
> > +#include <linux/mmc/host.h>
> > +#include <linux/mmc/mmc.h>
> > +#include <linux/of.h>
> > +
> > +#include "dw_mmc.h"
> > +#include "dw_mmc-pltfm.h"
> > +
> > +static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct
> mmc_ios *ios)
> > +{
> > + u32 regs;
> > +
> > + /* Set drive=4 (bit 29:23) and sample=2 (bit 22:16) in UHS_REG_EXT. */
> > + regs = mci_readl(host, UHS_REG_EXT);
> > + regs = (regs & ~0x3F100000 & ~0x7F0000) | (4 << 23) | (2 << 16);
> > + mci_writel(host, UHS_REG_EXT, regs);
> > +}
> > +
> > +static const struct dw_mci_drv_data bluefield_drv_data = {
> > + .set_ios = dw_mci_bluefield_set_ios
> > +};
> > +
> > +static const struct of_device_id dw_mci_bluefield_match[] = {
> > + { .compatible = "mellanox,bluefield-dw-mshc",
> > + .data = &bluefield_drv_data },
> > + {},
> > +};
> > +MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
> > +
> > +static int dw_mci_bluefield_probe(struct platform_device *pdev)
> > +{
> > + const struct dw_mci_drv_data *drv_data = NULL;
> > + const struct of_device_id *match;
> > +
> > + if (pdev->dev.of_node) {
> > + match = of_match_node(dw_mci_bluefield_match,
> > + pdev->dev.of_node);
> > + drv_data = match->data;
> > + }
> > +
> > + return dw_mci_pltfm_register(pdev, drv_data);
> > +}
> > +
> > +static struct platform_driver dw_mci_bluefield_pltfm_driver = {
> > + .probe = dw_mci_bluefield_probe,
> > + .remove = dw_mci_pltfm_remove,
> > + .driver = {
> > + .name = "dwmmc_bluefield",
> > + .of_match_table = dw_mci_bluefield_match,
> > + .pm = &dw_mci_pltfm_pmops,
> > + },
> > +};
> > +
> > +module_platform_driver(dw_mci_bluefield_pltfm_driver);
> > +
> > +MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
> > +MODULE_AUTHOR("Mellanox Technologies");
> > +MODULE_LICENSE("GPL v2");
> > --
> > 1.8.3.1
> >
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-04-23 15:17 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-20 17:32 [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension Liming Sun
2018-04-20 17:32 ` [PATCH 2/2] arm64: defconfig: Enable dw_mmc-bluefield driver Liming Sun
2018-04-23 9:31 ` [PATCH 1/2] mmc: dw_mmc-bluefield: Add driver extension Ulf Hansson
2018-04-23 15:17 ` Liming Sun
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