[PATCH v2 2/3] soc: mediatek: mtk-socinfo: Add driver for getting chip information
William-tw Lin
william-tw.lin at mediatek.com
Fri Sep 15 08:26:06 PDT 2023
Add driver for socinfo retrieval. This patch includes the following:
1. mtk-socinfo driver for chip info retrieval
2. Related changes to Makefile and Kconfig
Signed-off-by: William-tw Lin <william-tw.lin at mediatek.com>
---
drivers/soc/mediatek/Kconfig | 9 ++
drivers/soc/mediatek/Makefile | 1 +
drivers/soc/mediatek/mtk-socinfo.c | 166 +++++++++++++++++++++++++++++
3 files changed, 176 insertions(+)
create mode 100644 drivers/soc/mediatek/mtk-socinfo.c
diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig
index a88cf04fc803..5746d3b4c67d 100644
--- a/drivers/soc/mediatek/Kconfig
+++ b/drivers/soc/mediatek/Kconfig
@@ -91,4 +91,13 @@ config MTK_SVS
chip process corner, temperatures and other factors. Then DVFS
driver could apply SVS bank voltage to PMIC/Buck.
+config MTK_SOCINFO
+ tristate "MediaTek SOCINFO"
+ depends on MTK_EFUSE && NVMEM
+ help
+ Say y here to enable mtk socinfo information.
+ This enables a sysfs node which shows attributes of MTK soc info.
+ Information of soc info includes the manufacturer, the marketing
+ name, and the soc used.
+
endmenu
diff --git a/drivers/soc/mediatek/Makefile b/drivers/soc/mediatek/Makefile
index 9d3ce7878c5c..6830512848fd 100644
--- a/drivers/soc/mediatek/Makefile
+++ b/drivers/soc/mediatek/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_MTK_REGULATOR_COUPLER) += mtk-regulator-coupler.o
obj-$(CONFIG_MTK_MMSYS) += mtk-mmsys.o
obj-$(CONFIG_MTK_MMSYS) += mtk-mutex.o
obj-$(CONFIG_MTK_SVS) += mtk-svs.o
+obj-$(CONFIG_MTK_SOCINFO) += mtk-socinfo.o
diff --git a/drivers/soc/mediatek/mtk-socinfo.c b/drivers/soc/mediatek/mtk-socinfo.c
new file mode 100644
index 000000000000..fe5a68925f58
--- /dev/null
+++ b/drivers/soc/mediatek/mtk-socinfo.c
@@ -0,0 +1,166 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2023 MediaTek Inc.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/device.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/string.h>
+#include <linux/sys_soc.h>
+#include <linux/slab.h>
+
+#define MTK_SOCINFO_ENTRY(_soc_name, _segment_name, _marketing_name, _cell_data1, _cell_data2) {\
+ .soc_name = _soc_name, \
+ .segment_name = _segment_name, \
+ .marketing_name = _marketing_name, \
+ .cell_data = {_cell_data1, _cell_data2} \
+}
+#define CELL_NOT_USED (0xFFFFFFFF)
+#define MAX_CELLS (2)
+
+struct mtk_socinfo {
+ struct device *dev;
+ struct name_data *name_data;
+ struct socinfo_data *socinfo_data;
+};
+
+struct socinfo_data {
+ char *soc_name;
+ char *segment_name;
+ char *marketing_name;
+ u32 cell_data[MAX_CELLS];
+};
+
+const char *soc_manufacturer = "MediaTek";
+struct soc_device *soc_dev;
+char *cell_names[MAX_CELLS] = {"socinfo-data1", "socinfo-data2"};
+
+static struct socinfo_data socinfo_data_table[] = {
+ MTK_SOCINFO_ENTRY("MT8173", "MT8173V/AC", "MT8173", 0x6CA20004, 0x10000000),
+ MTK_SOCINFO_ENTRY("MT8183", "MT8183V/AZA", "Kompanio 500", 0x00010043, 0x00000840),
+ MTK_SOCINFO_ENTRY("MT8186", "MT8186GV/AZA", "Kompanio 520", 0x81861001, CELL_NOT_USED),
+ MTK_SOCINFO_ENTRY("MT8186T", "MT8186TV/AZA", "Kompanio 528", 0x81862001, CELL_NOT_USED),
+ MTK_SOCINFO_ENTRY("MT8188", "MT8188GV/AZA", "Kompanio 830", 0x81880000, 0x00000010),
+ MTK_SOCINFO_ENTRY("MT8188", "MT8188GV/HZA", "Kompanio 830", 0x81880000, 0x00000011),
+ MTK_SOCINFO_ENTRY("MT8192", "MT8192V/AZA", "Kompanio 820", 0x00001100, 0x00040080),
+ MTK_SOCINFO_ENTRY("MT8192T", "MT8192V/ATZA", "Kompanio 828", 0x00000100, 0x000400C0),
+ MTK_SOCINFO_ENTRY("MT8195", "MT8195GV/EZA", "Kompanio 1200", 0x81950300, CELL_NOT_USED),
+ MTK_SOCINFO_ENTRY("MT8195", "MT8195GV/EHZA", "Kompanio 1200", 0x81950304, CELL_NOT_USED),
+ MTK_SOCINFO_ENTRY("MT8195", "MT8195TV/EZA", "Kompanio 1380", 0x81950400, CELL_NOT_USED),
+ MTK_SOCINFO_ENTRY("MT8195", "MT8195TV/EHZA", "Kompanio 1380", 0x81950404, CELL_NOT_USED),
+};
+
+static int mtk_socinfo_create_socinfo_node(struct mtk_socinfo *mtk_socinfop)
+{
+ struct soc_device_attribute *attrs;
+ static char machine[30] = {0};
+
+ attrs = devm_kzalloc(mtk_socinfop->dev, sizeof(*attrs), GFP_KERNEL);
+ if (!attrs)
+ return -ENOMEM;
+
+ snprintf(machine, 30, "%s (%s)", mtk_socinfop->socinfo_data->marketing_name,
+ mtk_socinfop->socinfo_data->soc_name);
+ attrs->family = soc_manufacturer;
+ attrs->machine = machine;
+
+ soc_dev = soc_device_register(attrs);
+ if (IS_ERR(soc_dev))
+ return PTR_ERR(soc_dev);
+
+ dev_info(mtk_socinfop->dev, "%s SoC detected.\n", attrs->machine);
+ return 0;
+}
+
+static int mtk_socinfo_get_socinfo_data(struct mtk_socinfo *mtk_socinfop)
+{
+ unsigned int i = 0, j = 0;
+ unsigned int num_cell_data = 0;
+ u32 *cell_datap[MAX_CELLS] = { NULL };
+ size_t efuse_bytes;
+ struct nvmem_cell *cell;
+ bool match_socinfo = true;
+ int match_socinfo_index = -1;
+
+ for (i = 0; i < MAX_CELLS; i++) {
+ cell = nvmem_cell_get(mtk_socinfop->dev, cell_names[i]);
+ if (IS_ERR_OR_NULL(cell))
+ break;
+ cell_datap[i] = (u32 *)nvmem_cell_read(cell, &efuse_bytes);
+ nvmem_cell_put(cell);
+ num_cell_data++;
+ }
+
+ if (!num_cell_data)
+ return -ENOENT;
+
+ for (i = 0; i < ARRAY_SIZE(socinfo_data_table); i++) {
+ match_socinfo = true;
+ for (j = 0; j < num_cell_data; j++) {
+ if (*(cell_datap[j]) != socinfo_data_table[i].cell_data[j])
+ match_socinfo = false;
+ }
+ if (num_cell_data > 0 && match_socinfo) {
+ mtk_socinfop->socinfo_data = &(socinfo_data_table[i]);
+ match_socinfo_index = i;
+ break;
+ }
+ }
+
+ return match_socinfo_index >= 0 ? match_socinfo_index : -ENOENT;
+}
+
+static const struct of_device_id mtk_socinfo_id_table[] = {
+ { .compatible = "mediatek,socinfo" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mtk_socinfo_id_table);
+
+static int mtk_socinfo_probe(struct platform_device *pdev)
+{
+ struct mtk_socinfo *mtk_socinfop;
+ int ret = 0;
+
+ mtk_socinfop = devm_kzalloc(&pdev->dev, sizeof(*mtk_socinfop), GFP_KERNEL);
+ if (!mtk_socinfop)
+ return -ENOMEM;
+
+ mtk_socinfop->dev = &pdev->dev;
+
+ ret = mtk_socinfo_get_socinfo_data(mtk_socinfop);
+ if (ret < 0)
+ return dev_err_probe(mtk_socinfop->dev, ret, "Failed to get socinfo data\n");
+
+ ret = mtk_socinfo_create_socinfo_node(mtk_socinfop);
+ if (ret != 0)
+ return dev_err_probe(mtk_socinfop->dev, -EINVAL, "Failed to create socinfo node\n");
+
+ return 0;
+}
+
+static int mtk_socinfo_remove(struct platform_device *pdev)
+{
+ if (soc_dev)
+ soc_device_unregister(soc_dev);
+ return 0;
+}
+
+static struct platform_driver mtk_socinfo = {
+ .probe = mtk_socinfo_probe,
+ .remove = mtk_socinfo_remove,
+ .driver = {
+ .name = "mtk_socinfo",
+ .owner = THIS_MODULE,
+ .of_match_table = mtk_socinfo_id_table,
+ },
+};
+module_platform_driver(mtk_socinfo);
+MODULE_AUTHOR("William-TW LIN <william-tw.lin at mediatek.com>");
+MODULE_DESCRIPTION("Mediatek socinfo driver");
+MODULE_LICENSE("GPL");
--
2.18.0
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