diff options
| -rw-r--r-- | Documentation/devicetree/bindings/hwinfo/via,vt8500-scc-id.yaml | 37 | ||||
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/soc/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/soc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/soc/fsl/qe/qe_ic.c | 5 | ||||
| -rw-r--r-- | drivers/soc/vt8500/Kconfig | 19 | ||||
| -rw-r--r-- | drivers/soc/vt8500/Makefile | 2 | ||||
| -rw-r--r-- | drivers/soc/vt8500/wmt-socinfo.c | 125 |
8 files changed, 187 insertions, 5 deletions
diff --git a/Documentation/devicetree/bindings/hwinfo/via,vt8500-scc-id.yaml b/Documentation/devicetree/bindings/hwinfo/via,vt8500-scc-id.yaml new file mode 100644 index 000000000000..b0f425a4a882 --- /dev/null +++ b/Documentation/devicetree/bindings/hwinfo/via,vt8500-scc-id.yaml @@ -0,0 +1,37 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwinfo/via,vt8500-scc-id.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: VIA/WonderMedia SoC system configuration information + +maintainers: + - Alexey Charkov <alchark@gmail.com> + +description: + The system configuration controller on VIA/WonderMedia SoC's contains a chip + identifier and revision used to differentiate between different hardware + versions of on-chip IP blocks having their own peculiarities which may or + may not be captured by their respective DT compatible strings + +properties: + compatible: + items: + - const: via,vt8500-scc-id + + reg: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + chipid@d8120000 { + compatible = "via,vt8500-scc-id"; + reg = <0xd8120000 0x4>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index bd1fce741296..8ab070582af9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3428,6 +3428,7 @@ M: Alexey Charkov <alchark@gmail.com> M: Krzysztof Kozlowski <krzk@kernel.org> L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers) S: Odd Fixes +F: Documentation/devicetree/bindings/hwinfo/via,vt8500-scc-id.yaml F: Documentation/devicetree/bindings/i2c/i2c-wmt.txt F: arch/arm/boot/dts/vt8500/ F: arch/arm/mach-vt8500/ @@ -3436,6 +3437,7 @@ F: drivers/i2c/busses/i2c-viai2c-wmt.c F: drivers/mmc/host/wmt-sdmmc.c F: drivers/pwm/pwm-vt8500.c F: drivers/rtc/rtc-vt8500.c +F: drivers/soc/vt8500/ F: drivers/tty/serial/vt8500_serial.c F: drivers/video/fbdev/vt8500lcdfb.* F: drivers/video/fbdev/wm8505fb* diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index 6a8daeb8c4b9..37ca3f094f89 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -28,6 +28,7 @@ source "drivers/soc/tegra/Kconfig" source "drivers/soc/ti/Kconfig" source "drivers/soc/ux500/Kconfig" source "drivers/soc/versatile/Kconfig" +source "drivers/soc/vt8500/Kconfig" source "drivers/soc/xilinx/Kconfig" endmenu diff --git a/drivers/soc/Makefile b/drivers/soc/Makefile index 2037a8695cb2..777255401252 100644 --- a/drivers/soc/Makefile +++ b/drivers/soc/Makefile @@ -34,4 +34,5 @@ obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-y += ti/ obj-$(CONFIG_ARCH_U8500) += ux500/ obj-y += versatile/ +obj-y += vt8500/ obj-y += xilinx/ diff --git a/drivers/soc/fsl/qe/qe_ic.c b/drivers/soc/fsl/qe/qe_ic.c index 77bf0e83ffcc..7eab15553f2f 100644 --- a/drivers/soc/fsl/qe/qe_ic.c +++ b/drivers/soc/fsl/qe/qe_ic.c @@ -232,11 +232,6 @@ static inline void qe_ic_write(__be32 __iomem *base, unsigned int reg, iowrite32be(value, base + (reg >> 2)); } -static inline struct qe_ic *qe_ic_from_irq(unsigned int virq) -{ - return irq_get_chip_data(virq); -} - static inline struct qe_ic *qe_ic_from_irq_data(struct irq_data *d) { return irq_data_get_irq_chip_data(d); diff --git a/drivers/soc/vt8500/Kconfig b/drivers/soc/vt8500/Kconfig new file mode 100644 index 000000000000..b4cc0ba1128b --- /dev/null +++ b/drivers/soc/vt8500/Kconfig @@ -0,0 +1,19 @@ +# SPDX-License-Identifier: GPL-2.0-only + +if ARCH_VT8500 || COMPILE_TEST + +menu "VIA/WonderMedia SoC drivers" + +config WMT_SOCINFO + bool "VIA/WonderMedia SoC Information driver" + default ARCH_VT8500 + select SOC_BUS + help + Say yes to support decoding of VIA/WonderMedia system configuration + register information. This currently includes just the chip ID register + which helps identify the exact hardware revision of the SoC the kernel + is running on (to know if any revision-specific quirks are required) + +endmenu + +endif diff --git a/drivers/soc/vt8500/Makefile b/drivers/soc/vt8500/Makefile new file mode 100644 index 000000000000..05964c5f2890 --- /dev/null +++ b/drivers/soc/vt8500/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_WMT_SOCINFO) += wmt-socinfo.o diff --git a/drivers/soc/vt8500/wmt-socinfo.c b/drivers/soc/vt8500/wmt-socinfo.c new file mode 100644 index 000000000000..461f8c1ae56e --- /dev/null +++ b/drivers/soc/vt8500/wmt-socinfo.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 2025 Alexey Charkov <alchark@gmail.com> + * Based on aspeed-socinfo.c + */ + +#include <linux/dev_printk.h> +#include <linux/device.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/sys_soc.h> + +static const struct { + const char *name; + const u32 id; +} chip_id_table[] = { + /* VIA */ + { "VT8420", 0x3300 }, + { "VT8430", 0x3357 }, + { "VT8500", 0x3400 }, + + /* WonderMedia */ + { "WM8425", 0x3429 }, + { "WM8435", 0x3437 }, + { "WM8440", 0x3451 }, + { "WM8505", 0x3426 }, + { "WM8650", 0x3465 }, + { "WM8750", 0x3445 }, + { "WM8850", 0x3481 }, + { "WM8880", 0x3498 }, +}; + +static const char *sccid_to_name(u32 sccid) +{ + u32 id = sccid >> 16; + unsigned int i; + + for (i = 0 ; i < ARRAY_SIZE(chip_id_table) ; ++i) { + if (chip_id_table[i].id == id) + return chip_id_table[i].name; + } + + return "Unknown"; +} + +static int wmt_socinfo_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct soc_device_attribute *attrs; + struct soc_device *soc_dev; + char letter, digit; + void __iomem *reg; + u32 sccid; + + reg = devm_of_iomap(&pdev->dev, np, 0, NULL); + if (IS_ERR(reg)) + return PTR_ERR(reg); + + sccid = readl(reg); + + attrs = devm_kzalloc(&pdev->dev, sizeof(*attrs), GFP_KERNEL); + if (!attrs) + return -ENOMEM; + + /* + * Machine: VIA APC Rock + * Family: WM8850 + * Revision: A2 + * SoC ID: raw silicon revision id (34810103 in hexadecimal) + */ + + attrs->family = sccid_to_name(sccid); + + letter = (sccid >> 8) & 0xf; + letter = (letter - 1) + 'A'; + digit = sccid & 0xff; + digit = (digit - 1) + '0'; + attrs->revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "%c%c", letter, digit); + + attrs->soc_id = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%08x", sccid); + + if (!attrs->revision || !attrs->soc_id) + return -ENOMEM; + + soc_dev = soc_device_register(attrs); + if (IS_ERR(soc_dev)) + return PTR_ERR(soc_dev); + + dev_info(&pdev->dev, + "VIA/WonderMedia %s rev %s (%s)\n", + attrs->family, + attrs->revision, + attrs->soc_id); + + platform_set_drvdata(pdev, soc_dev); + return 0; +} + +static void wmt_socinfo_remove(struct platform_device *pdev) +{ + struct soc_device *soc_dev = platform_get_drvdata(pdev); + + soc_device_unregister(soc_dev); +} + +static const struct of_device_id wmt_socinfo_ids[] = { + { .compatible = "via,vt8500-scc-id" }, + { /* Sentinel */ }, +}; + +static struct platform_driver wmt_socinfo = { + .probe = wmt_socinfo_probe, + .remove = wmt_socinfo_remove, + .driver = { + .name = "wmt-socinfo", + .of_match_table = wmt_socinfo_ids, + }, +}; +module_platform_driver(wmt_socinfo); + +MODULE_AUTHOR("Alexey Charkov <alchark@gmail.com>"); +MODULE_DESCRIPTION("VIA/WonderMedia socinfo driver"); +MODULE_LICENSE("GPL"); |