[v5] LoongArch: Add Loongson-2K BMC support

[PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver

Posted by Binbin Zhou 3 months, 3 weeks ago

The Loongson-2K Board Management Controller provides an PCIe interface
to the host to access the feature implemented in the BMC.

The BMC is assembled on a server similar to the server machine with
Loongson-3 CPU. It supports multiple sub-devices like DRM and IPMI.

Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Co-developed-by: Chong Qiao <qiaochong@loongson.cn>
Signed-off-by: Chong Qiao <qiaochong@loongson.cn>
Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
---
 drivers/mfd/Kconfig         |  11 +++
 drivers/mfd/Makefile        |   2 +
 drivers/mfd/ls2k-bmc-core.c | 156 ++++++++++++++++++++++++++++++++++++
 3 files changed, 169 insertions(+)
 create mode 100644 drivers/mfd/ls2k-bmc-core.c

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 96992af22565..a1081c4211b0 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2389,6 +2389,18 @@ config MFD_INTEL_M10_BMC_PMCI
 	  additional drivers must be enabled in order to use the functionality
 	  of the device.
 
+config MFD_LS2K_BMC_CORE
+	bool "Loongson-2K Board Management Controller Support"
+	select MFD_CORE
+	help
+	  Say yes here to add support for the Loongson-2K BMC which is a Board
+	  Management Controller connected to the PCIe bus. The device supports
+	  multiple sub-devices like display and IPMI. This driver provides common
+	  support for accessing the devices.
+
+	  The display is enabled by default in the driver, while the IPMI interface
+	  is enabled independently through the IPMI_LS2K option in the IPMI section.
+
 config MFD_QNAP_MCU
 	tristate "QNAP microcontroller unit core driver"
 	depends on SERIAL_DEV_BUS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 5e5cc279af60..6bad54edca34 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -282,6 +282,8 @@ obj-$(CONFIG_MFD_INTEL_M10_BMC_CORE)   += intel-m10-bmc-core.o
 obj-$(CONFIG_MFD_INTEL_M10_BMC_SPI)    += intel-m10-bmc-spi.o
 obj-$(CONFIG_MFD_INTEL_M10_BMC_PMCI)   += intel-m10-bmc-pmci.o
 
+obj-$(CONFIG_MFD_LS2K_BMC_CORE)		+= ls2k-bmc-core.o
+
 obj-$(CONFIG_MFD_ATC260X)	+= atc260x-core.o
 obj-$(CONFIG_MFD_ATC260X_I2C)	+= atc260x-i2c.o
 
diff --git a/drivers/mfd/ls2k-bmc-core.c b/drivers/mfd/ls2k-bmc-core.c
new file mode 100644
index 000000000000..9ee1edf286e7
--- /dev/null
+++ b/drivers/mfd/ls2k-bmc-core.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Loongson-2K Board Management Controller (BMC) Core Driver.
+ *
+ * Copyright (C) 2024-2025 Loongson Technology Corporation Limited.
+ *
+ * Authors:
+ *	Chong Qiao <qiaochong@loongson.cn>
+ *	Binbin Zhou <zhoubinbin@loongson.cn>
+ */
+
+#include <linux/aperture.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/platform_data/simplefb.h>
+#include <linux/platform_device.h>
+
+/* LS2K BMC resources */
+#define LS2K_DISPLAY_RES_START		(SZ_16M + SZ_2M)
+#define LS2K_IPMI_RES_SIZE		0x1C
+#define LS2K_IPMI0_RES_START		(SZ_16M + 0xF00000)
+#define LS2K_IPMI1_RES_START		(LS2K_IPMI0_RES_START + LS2K_IPMI_RES_SIZE)
+#define LS2K_IPMI2_RES_START		(LS2K_IPMI1_RES_START + LS2K_IPMI_RES_SIZE)
+#define LS2K_IPMI3_RES_START		(LS2K_IPMI2_RES_START + LS2K_IPMI_RES_SIZE)
+#define LS2K_IPMI4_RES_START		(LS2K_IPMI3_RES_START + LS2K_IPMI_RES_SIZE)
+
+static struct resource ls2k_display_resources[] = {
+	DEFINE_RES_MEM_NAMED(LS2K_DISPLAY_RES_START, SZ_4M, "simpledrm-res"),
+};
+
+static struct resource ls2k_ipmi0_resources[] = {
+	DEFINE_RES_MEM_NAMED(LS2K_IPMI0_RES_START, LS2K_IPMI_RES_SIZE, "ipmi0-res"),
+};
+
+static struct resource ls2k_ipmi1_resources[] = {
+	DEFINE_RES_MEM_NAMED(LS2K_IPMI1_RES_START, LS2K_IPMI_RES_SIZE, "ipmi1-res"),
+};
+
+static struct resource ls2k_ipmi2_resources[] = {
+	DEFINE_RES_MEM_NAMED(LS2K_IPMI2_RES_START, LS2K_IPMI_RES_SIZE, "ipmi2-res"),
+};
+
+static struct resource ls2k_ipmi3_resources[] = {
+	DEFINE_RES_MEM_NAMED(LS2K_IPMI3_RES_START, LS2K_IPMI_RES_SIZE, "ipmi3-res"),
+};
+
+static struct resource ls2k_ipmi4_resources[] = {
+	DEFINE_RES_MEM_NAMED(LS2K_IPMI4_RES_START, LS2K_IPMI_RES_SIZE, "ipmi4-res"),
+};
+
+static struct mfd_cell ls2k_bmc_cells[] = {
+	MFD_CELL_RES("simple-framebuffer", ls2k_display_resources),
+	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi0_resources),
+	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi1_resources),
+	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi2_resources),
+	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi3_resources),
+	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi4_resources),
+};
+
+/*
+ * Currently the Loongson-2K BMC hardware does not have an I2C interface to adapt to the
+ * resolution. We set the resolution by presetting "video=1280x1024-16@2M" to the BMC memory.
+ */
+static int ls2k_bmc_parse_mode(struct pci_dev *pdev, struct simplefb_platform_data *pd)
+{
+	char *mode;
+	int depth, ret;
+
+	/* The last 16M of PCI BAR0 is used to store the resolution string. */
+	mode = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0) + SZ_16M, SZ_16M);
+	if (!mode)
+		return -ENOMEM;
+
+	/* The resolution field starts with the flag "video=". */
+	if (!strncmp(mode, "video=", 6))
+		mode = mode + 6;
+
+	ret = kstrtoint(strsep(&mode, "x"), 10, &pd->width);
+	if (ret)
+		return ret;
+
+	ret = kstrtoint(strsep(&mode, "-"), 10, &pd->height);
+	if (ret)
+		return ret;
+
+	ret = kstrtoint(strsep(&mode, "@"), 10, &depth);
+	if (ret)
+		return ret;
+
+	pd->stride = pd->width * depth / 8;
+	pd->format = depth == 32 ? "a8r8g8b8" : "r5g6b5";
+
+	return 0;
+}
+
+static int ls2k_bmc_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct simplefb_platform_data pd;
+	resource_size_t base;
+	int ret;
+
+	ret = pci_enable_device(dev);
+	if (ret)
+		return ret;
+
+	ret = ls2k_bmc_parse_mode(dev, &pd);
+	if (ret)
+		goto disable_pci;
+
+	ls2k_bmc_cells[0].platform_data = &pd;
+	ls2k_bmc_cells[0].pdata_size = sizeof(pd);
+	base = dev->resource[0].start + LS2K_DISPLAY_RES_START;
+
+	/* Remove conflicting efifb device */
+	ret = aperture_remove_conflicting_devices(base, SZ_4M, "simple-framebuffer");
+	if (ret) {
+		dev_err(&dev->dev, "Failed to removed firmware framebuffers: %d\n", ret);
+		goto disable_pci;
+	}
+
+	return devm_mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO,
+				    ls2k_bmc_cells, ARRAY_SIZE(ls2k_bmc_cells),
+				    &dev->resource[0], 0, NULL);
+
+disable_pci:
+	pci_disable_device(dev);
+	return ret;
+}
+
+static void ls2k_bmc_remove(struct pci_dev *dev)
+{
+	pci_disable_device(dev);
+}
+
+static struct pci_device_id ls2k_bmc_devices[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x1a05) },
+	{ }
+};
+MODULE_DEVICE_TABLE(pci, ls2k_bmc_devices);
+
+static struct pci_driver ls2k_bmc_driver = {
+	.name = "ls2k-bmc",
+	.id_table = ls2k_bmc_devices,
+	.probe = ls2k_bmc_probe,
+	.remove = ls2k_bmc_remove,
+};
+module_pci_driver(ls2k_bmc_driver);
+
+MODULE_DESCRIPTION("Loongson-2K BMC Core driver");
+MODULE_AUTHOR("Loongson Technology Corporation Limited");
+MODULE_LICENSE("GPL");
-- 
2.47.1

Re: [PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver

Posted by kernel test robot 3 months, 2 weeks ago

Hi Binbin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 8ffcb7560b4a15faf821df95e3ab532b2b020f8c]

url:    https://github.com/intel-lab-lkp/linux/commits/Binbin-Zhou/mfd-ls2kbmc-Introduce-Loongson-2K-BMC-core-driver/20250620-100856
base:   8ffcb7560b4a15faf821df95e3ab532b2b020f8c
patch link:    https://lore.kernel.org/r/82cbc8558f15981e0953ab229d2afcc5501f982c.1750301674.git.zhoubinbin%40loongson.cn
patch subject: [PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver
config: x86_64-randconfig-123-20250621 (https://download.01.org/0day-ci/archive/20250621/202506210652.ipUFDU5B-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250621/202506210652.ipUFDU5B-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506210652.ipUFDU5B-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/mfd/ls2k-bmc-core.c:75:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected char *mode @@     got void [noderef] __iomem * @@
   drivers/mfd/ls2k-bmc-core.c:75:14: sparse:     expected char *mode
   drivers/mfd/ls2k-bmc-core.c:75:14: sparse:     got void [noderef] __iomem *

vim +75 drivers/mfd/ls2k-bmc-core.c

    64	
    65	/*
    66	 * Currently the Loongson-2K BMC hardware does not have an I2C interface to adapt to the
    67	 * resolution. We set the resolution by presetting "video=1280x1024-16@2M" to the BMC memory.
    68	 */
    69	static int ls2k_bmc_parse_mode(struct pci_dev *pdev, struct simplefb_platform_data *pd)
    70	{
    71		char *mode;
    72		int depth, ret;
    73	
    74		/* The last 16M of PCI BAR0 is used to store the resolution string. */
  > 75		mode = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0) + SZ_16M, SZ_16M);
    76		if (!mode)
    77			return -ENOMEM;
    78	
    79		/* The resolution field starts with the flag "video=". */
    80		if (!strncmp(mode, "video=", 6))
    81			mode = mode + 6;
    82	
    83		ret = kstrtoint(strsep(&mode, "x"), 10, &pd->width);
    84		if (ret)
    85			return ret;
    86	
    87		ret = kstrtoint(strsep(&mode, "-"), 10, &pd->height);
    88		if (ret)
    89			return ret;
    90	
    91		ret = kstrtoint(strsep(&mode, "@"), 10, &depth);
    92		if (ret)
    93			return ret;
    94	
    95		pd->stride = pd->width * depth / 8;
    96		pd->format = depth == 32 ? "a8r8g8b8" : "r5g6b5";
    97	
    98		return 0;
    99	}
   100	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver

Posted by Corey Minyard 3 months, 2 weeks ago

On Fri, Jun 20, 2025 at 10:06:27AM +0800, Binbin Zhou wrote:
> The Loongson-2K Board Management Controller provides an PCIe interface
> to the host to access the feature implemented in the BMC.
> 
> The BMC is assembled on a server similar to the server machine with
> Loongson-3 CPU. It supports multiple sub-devices like DRM and IPMI.
> 
> Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
> Co-developed-by: Chong Qiao <qiaochong@loongson.cn>
> Signed-off-by: Chong Qiao <qiaochong@loongson.cn>
> Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
> ---
>  drivers/mfd/Kconfig         |  11 +++
>  drivers/mfd/Makefile        |   2 +
>  drivers/mfd/ls2k-bmc-core.c | 156 ++++++++++++++++++++++++++++++++++++
>  3 files changed, 169 insertions(+)
>  create mode 100644 drivers/mfd/ls2k-bmc-core.c
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 96992af22565..a1081c4211b0 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -2389,6 +2389,18 @@ config MFD_INTEL_M10_BMC_PMCI
>  	  additional drivers must be enabled in order to use the functionality
>  	  of the device.
>  
> +config MFD_LS2K_BMC_CORE
> +	bool "Loongson-2K Board Management Controller Support"
> +	select MFD_CORE

Also, from the recent bug report, this is missing a depends on PCI.

> +	help
> +	  Say yes here to add support for the Loongson-2K BMC which is a Board
> +	  Management Controller connected to the PCIe bus. The device supports
> +	  multiple sub-devices like display and IPMI. This driver provides common
> +	  support for accessing the devices.
> +
> +	  The display is enabled by default in the driver, while the IPMI interface
> +	  is enabled independently through the IPMI_LS2K option in the IPMI section.
> +
>  config MFD_QNAP_MCU
>  	tristate "QNAP microcontroller unit core driver"
>  	depends on SERIAL_DEV_BUS
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index 5e5cc279af60..6bad54edca34 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -282,6 +282,8 @@ obj-$(CONFIG_MFD_INTEL_M10_BMC_CORE)   += intel-m10-bmc-core.o
>  obj-$(CONFIG_MFD_INTEL_M10_BMC_SPI)    += intel-m10-bmc-spi.o
>  obj-$(CONFIG_MFD_INTEL_M10_BMC_PMCI)   += intel-m10-bmc-pmci.o
>  
> +obj-$(CONFIG_MFD_LS2K_BMC_CORE)		+= ls2k-bmc-core.o
> +
>  obj-$(CONFIG_MFD_ATC260X)	+= atc260x-core.o
>  obj-$(CONFIG_MFD_ATC260X_I2C)	+= atc260x-i2c.o
>  
> diff --git a/drivers/mfd/ls2k-bmc-core.c b/drivers/mfd/ls2k-bmc-core.c
> new file mode 100644
> index 000000000000..9ee1edf286e7
> --- /dev/null
> +++ b/drivers/mfd/ls2k-bmc-core.c
> @@ -0,0 +1,156 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Loongson-2K Board Management Controller (BMC) Core Driver.
> + *
> + * Copyright (C) 2024-2025 Loongson Technology Corporation Limited.
> + *
> + * Authors:
> + *	Chong Qiao <qiaochong@loongson.cn>
> + *	Binbin Zhou <zhoubinbin@loongson.cn>
> + */
> +
> +#include <linux/aperture.h>
> +#include <linux/errno.h>
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/mfd/core.h>
> +#include <linux/module.h>
> +#include <linux/pci.h>
> +#include <linux/pci_ids.h>
> +#include <linux/platform_data/simplefb.h>
> +#include <linux/platform_device.h>
> +
> +/* LS2K BMC resources */
> +#define LS2K_DISPLAY_RES_START		(SZ_16M + SZ_2M)
> +#define LS2K_IPMI_RES_SIZE		0x1C
> +#define LS2K_IPMI0_RES_START		(SZ_16M + 0xF00000)
> +#define LS2K_IPMI1_RES_START		(LS2K_IPMI0_RES_START + LS2K_IPMI_RES_SIZE)
> +#define LS2K_IPMI2_RES_START		(LS2K_IPMI1_RES_START + LS2K_IPMI_RES_SIZE)
> +#define LS2K_IPMI3_RES_START		(LS2K_IPMI2_RES_START + LS2K_IPMI_RES_SIZE)
> +#define LS2K_IPMI4_RES_START		(LS2K_IPMI3_RES_START + LS2K_IPMI_RES_SIZE)
> +
> +static struct resource ls2k_display_resources[] = {
> +	DEFINE_RES_MEM_NAMED(LS2K_DISPLAY_RES_START, SZ_4M, "simpledrm-res"),
> +};
> +
> +static struct resource ls2k_ipmi0_resources[] = {
> +	DEFINE_RES_MEM_NAMED(LS2K_IPMI0_RES_START, LS2K_IPMI_RES_SIZE, "ipmi0-res"),
> +};
> +
> +static struct resource ls2k_ipmi1_resources[] = {
> +	DEFINE_RES_MEM_NAMED(LS2K_IPMI1_RES_START, LS2K_IPMI_RES_SIZE, "ipmi1-res"),
> +};
> +
> +static struct resource ls2k_ipmi2_resources[] = {
> +	DEFINE_RES_MEM_NAMED(LS2K_IPMI2_RES_START, LS2K_IPMI_RES_SIZE, "ipmi2-res"),
> +};
> +
> +static struct resource ls2k_ipmi3_resources[] = {
> +	DEFINE_RES_MEM_NAMED(LS2K_IPMI3_RES_START, LS2K_IPMI_RES_SIZE, "ipmi3-res"),
> +};
> +
> +static struct resource ls2k_ipmi4_resources[] = {
> +	DEFINE_RES_MEM_NAMED(LS2K_IPMI4_RES_START, LS2K_IPMI_RES_SIZE, "ipmi4-res"),
> +};
> +
> +static struct mfd_cell ls2k_bmc_cells[] = {
> +	MFD_CELL_RES("simple-framebuffer", ls2k_display_resources),
> +	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi0_resources),
> +	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi1_resources),
> +	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi2_resources),
> +	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi3_resources),
> +	MFD_CELL_RES("ls2k-ipmi-si", ls2k_ipmi4_resources),
> +};
> +
> +/*
> + * Currently the Loongson-2K BMC hardware does not have an I2C interface to adapt to the
> + * resolution. We set the resolution by presetting "video=1280x1024-16@2M" to the BMC memory.
> + */
> +static int ls2k_bmc_parse_mode(struct pci_dev *pdev, struct simplefb_platform_data *pd)
> +{
> +	char *mode;
> +	int depth, ret;
> +
> +	/* The last 16M of PCI BAR0 is used to store the resolution string. */
> +	mode = devm_ioremap(&pdev->dev, pci_resource_start(pdev, 0) + SZ_16M, SZ_16M);
> +	if (!mode)
> +		return -ENOMEM;
> +
> +	/* The resolution field starts with the flag "video=". */
> +	if (!strncmp(mode, "video=", 6))
> +		mode = mode + 6;
> +
> +	ret = kstrtoint(strsep(&mode, "x"), 10, &pd->width);
> +	if (ret)
> +		return ret;
> +
> +	ret = kstrtoint(strsep(&mode, "-"), 10, &pd->height);
> +	if (ret)
> +		return ret;
> +
> +	ret = kstrtoint(strsep(&mode, "@"), 10, &depth);
> +	if (ret)
> +		return ret;
> +
> +	pd->stride = pd->width * depth / 8;
> +	pd->format = depth == 32 ? "a8r8g8b8" : "r5g6b5";
> +
> +	return 0;
> +}
> +
> +static int ls2k_bmc_probe(struct pci_dev *dev, const struct pci_device_id *id)
> +{
> +	struct simplefb_platform_data pd;
> +	resource_size_t base;
> +	int ret;
> +
> +	ret = pci_enable_device(dev);
> +	if (ret)
> +		return ret;
> +
> +	ret = ls2k_bmc_parse_mode(dev, &pd);
> +	if (ret)
> +		goto disable_pci;
> +
> +	ls2k_bmc_cells[0].platform_data = &pd;
> +	ls2k_bmc_cells[0].pdata_size = sizeof(pd);
> +	base = dev->resource[0].start + LS2K_DISPLAY_RES_START;
> +
> +	/* Remove conflicting efifb device */
> +	ret = aperture_remove_conflicting_devices(base, SZ_4M, "simple-framebuffer");
> +	if (ret) {
> +		dev_err(&dev->dev, "Failed to removed firmware framebuffers: %d\n", ret);
> +		goto disable_pci;
> +	}
> +
> +	return devm_mfd_add_devices(&dev->dev, PLATFORM_DEVID_AUTO,
> +				    ls2k_bmc_cells, ARRAY_SIZE(ls2k_bmc_cells),
> +				    &dev->resource[0], 0, NULL);
> +
> +disable_pci:
> +	pci_disable_device(dev);
> +	return ret;
> +}
> +
> +static void ls2k_bmc_remove(struct pci_dev *dev)
> +{
> +	pci_disable_device(dev);
> +}
> +
> +static struct pci_device_id ls2k_bmc_devices[] = {
> +	{ PCI_DEVICE(PCI_VENDOR_ID_LOONGSON, 0x1a05) },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(pci, ls2k_bmc_devices);
> +
> +static struct pci_driver ls2k_bmc_driver = {
> +	.name = "ls2k-bmc",
> +	.id_table = ls2k_bmc_devices,
> +	.probe = ls2k_bmc_probe,
> +	.remove = ls2k_bmc_remove,
> +};
> +module_pci_driver(ls2k_bmc_driver);
> +
> +MODULE_DESCRIPTION("Loongson-2K BMC Core driver");
> +MODULE_AUTHOR("Loongson Technology Corporation Limited");
> +MODULE_LICENSE("GPL");
> -- 
> 2.47.1
>

Re: [PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver

Posted by kernel test robot 3 months, 2 weeks ago

Hi Binbin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 8ffcb7560b4a15faf821df95e3ab532b2b020f8c]

url:    https://github.com/intel-lab-lkp/linux/commits/Binbin-Zhou/mfd-ls2kbmc-Introduce-Loongson-2K-BMC-core-driver/20250620-100856
base:   8ffcb7560b4a15faf821df95e3ab532b2b020f8c
patch link:    https://lore.kernel.org/r/82cbc8558f15981e0953ab229d2afcc5501f982c.1750301674.git.zhoubinbin%40loongson.cn
patch subject: [PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver
config: x86_64-buildonly-randconfig-003-20250621 (https://download.01.org/0day-ci/archive/20250621/202506210231.ZWWNhofU-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250621/202506210231.ZWWNhofU-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506210231.ZWWNhofU-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/mfd/ls2k-bmc-core.c:152:1: warning: data definition has no type or storage class
     152 | module_pci_driver(ls2k_bmc_driver);
         | ^~~~~~~~~~~~~~~~~
   drivers/mfd/ls2k-bmc-core.c:152:1: error: type defaults to 'int' in declaration of 'module_pci_driver' [-Werror=implicit-int]
>> drivers/mfd/ls2k-bmc-core.c:152:1: warning: parameter names (without types) in function declaration
   drivers/mfd/ls2k-bmc-core.c:146:26: warning: 'ls2k_bmc_driver' defined but not used [-Wunused-variable]
     146 | static struct pci_driver ls2k_bmc_driver = {
         |                          ^~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +152 drivers/mfd/ls2k-bmc-core.c

   145	
   146	static struct pci_driver ls2k_bmc_driver = {
   147		.name = "ls2k-bmc",
   148		.id_table = ls2k_bmc_devices,
   149		.probe = ls2k_bmc_probe,
   150		.remove = ls2k_bmc_remove,
   151	};
 > 152	module_pci_driver(ls2k_bmc_driver);
   153	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver

Posted by kernel test robot 3 months, 2 weeks ago

Hi Binbin,

kernel test robot noticed the following build errors:

[auto build test ERROR on 8ffcb7560b4a15faf821df95e3ab532b2b020f8c]

url:    https://github.com/intel-lab-lkp/linux/commits/Binbin-Zhou/mfd-ls2kbmc-Introduce-Loongson-2K-BMC-core-driver/20250620-100856
base:   8ffcb7560b4a15faf821df95e3ab532b2b020f8c
patch link:    https://lore.kernel.org/r/82cbc8558f15981e0953ab229d2afcc5501f982c.1750301674.git.zhoubinbin%40loongson.cn
patch subject: [PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20250621/202506210204.LVZc2VG2-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250621/202506210204.LVZc2VG2-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506210204.LVZc2VG2-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

>> drivers/mfd/ls2k-bmc-core.c:152:1: warning: data definition has no type or storage class
     152 | module_pci_driver(ls2k_bmc_driver);
         | ^~~~~~~~~~~~~~~~~
>> drivers/mfd/ls2k-bmc-core.c:152:1: error: type defaults to 'int' in declaration of 'module_pci_driver' [-Wimplicit-int]
>> drivers/mfd/ls2k-bmc-core.c:152:1: error: parameter names (without types) in function declaration [-Wdeclaration-missing-parameter-type]
>> drivers/mfd/ls2k-bmc-core.c:146:26: warning: 'ls2k_bmc_driver' defined but not used [-Wunused-variable]
     146 | static struct pci_driver ls2k_bmc_driver = {
         |                          ^~~~~~~~~~~~~~~


vim +152 drivers/mfd/ls2k-bmc-core.c

   145	
 > 146	static struct pci_driver ls2k_bmc_driver = {
   147		.name = "ls2k-bmc",
   148		.id_table = ls2k_bmc_devices,
   149		.probe = ls2k_bmc_probe,
   150		.remove = ls2k_bmc_remove,
   151	};
 > 152	module_pci_driver(ls2k_bmc_driver);
   153	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

[PATCH v5 1/3] mfd: ls2kbmc: Introduce Loongson-2K BMC core driver
[PATCH v5 2/3] mfd: ls2kbmc: Add Loongson-2K BMC reset function support
[PATCH v5 3/3] ipmi: Add Loongson-2K BMC support