The Qualcomm socinfo provides a number of additional attributes,
add these to the socinfo driver and expose them via debugfs
functionality.

Signed-off-by: Vaishali Thakkar <vaishali.thak...@linaro.org>
---
Changes since v1:
        - Remove unnecessary debugfs dir creation check
        - Align ifdefs to left
        - Fix function signatures for debugfs init/exit
---
 drivers/soc/qcom/socinfo.c | 198 +++++++++++++++++++++++++++++++++++++
 1 file changed, 198 insertions(+)

diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
index 02078049fac7..5f4bef216ae1 100644
--- a/drivers/soc/qcom/socinfo.c
+++ b/drivers/soc/qcom/socinfo.c
@@ -4,6 +4,7 @@
  * Copyright (c) 2017-2019, Linaro Ltd.
  */
 
+#include <linux/debugfs.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
@@ -29,6 +30,28 @@
  */
 #define SMEM_HW_SW_BUILD_ID            137
 
+#ifdef CONFIG_DEBUG_FS
+/* pmic model info */
+static const char *const pmic_model[] = {
+       [0]  = "Unknown PMIC model",
+       [9]  = "PM8994",
+       [11] = "PM8916",
+       [13] = "PM8058",
+       [14] = "PM8028",
+       [15] = "PM8901",
+       [16] = "PM8027",
+       [17] = "ISL9519",
+       [18] = "PM8921",
+       [19] = "PM8018",
+       [20] = "PM8015",
+       [21] = "PM8014",
+       [22] = "PM8821",
+       [23] = "PM8038",
+       [24] = "PM8922",
+       [25] = "PM8917",
+};
+#endif /* CONFIG_DEBUG_FS */
+
 /* Socinfo SMEM item structure */
 struct socinfo {
        __le32 fmt;
@@ -70,6 +93,10 @@ struct socinfo {
 struct qcom_socinfo {
        struct soc_device *soc_dev;
        struct soc_device_attribute attr;
+#ifdef CONFIG_DEBUG_FS
+       struct dentry *dbg_root;
+#endif /* CONFIG_DEBUG_FS */
+       struct socinfo *socinfo;
 };
 
 struct soc_of_id {
@@ -133,6 +160,171 @@ static const char *socinfo_machine(struct device *dev, 
unsigned int id)
        return NULL;
 }
 
+#ifdef CONFIG_DEBUG_FS
+
+#define UINT_SHOW(name, attr)                                          \
+static int qcom_show_##name(struct seq_file *seq, void *p)             \
+{                                                                      \
+       struct socinfo *socinfo = seq->private;                         \
+       seq_printf(seq, "%u\n", le32_to_cpu(socinfo->attr));            \
+       return 0;                                                       \
+}                                                                      \
+static int qcom_open_##name(struct inode *inode, struct file *file)    \
+{                                                                      \
+       return single_open(file, qcom_show_##name, inode->i_private);   \
+}                                                                      \
+                                                                       \
+static const struct file_operations qcom_ ##name## _ops = {            \
+       .open = qcom_open_##name,                                       \
+       .read = seq_read,                                               \
+       .llseek = seq_lseek,                                            \
+       .release = single_release,                                      \
+}
+
+#define DEBUGFS_UINT_ADD(name)                                         \
+       debugfs_create_file(__stringify(name), 0400,                    \
+                           qcom_socinfo->dbg_root,                     \
+                           qcom_socinfo->socinfo, &qcom_ ##name## _ops)
+
+#define HEX_SHOW(name, attr)                                           \
+static int qcom_show_##name(struct seq_file *seq, void *p)             \
+{                                                                      \
+       struct socinfo *socinfo = seq->private;                         \
+       seq_printf(seq, "0x%x\n", le32_to_cpu(socinfo->attr));          \
+       return 0;                                                       \
+}                                                                      \
+static int qcom_open_##name(struct inode *inode, struct file *file)    \
+{                                                                      \
+       return single_open(file, qcom_show_##name, inode->i_private);   \
+}                                                                      \
+                                                                       \
+static const struct file_operations qcom_ ##name## _ops = {            \
+       .open = qcom_open_##name,                                       \
+       .read = seq_read,                                               \
+       .llseek = seq_lseek,                                            \
+       .release = single_release,                                      \
+}
+
+#define DEBUGFS_HEX_ADD(name)                                          \
+       debugfs_create_file(__stringify(name), 0400,                    \
+                           qcom_socinfo->dbg_root,                     \
+                           qcom_socinfo->socinfo, &qcom_ ##name## _ops)
+
+
+#define QCOM_OPEN(name, _func)                                         \
+static int qcom_open_##name(struct inode *inode, struct file *file)    \
+{                                                                      \
+       return single_open(file, _func, inode->i_private);              \
+}                                                                      \
+                                                                       \
+static const struct file_operations qcom_ ##name## _ops = {            \
+       .open = qcom_open_##name,                                       \
+       .read = seq_read,                                               \
+       .llseek = seq_lseek,                                            \
+       .release = single_release,                                      \
+}
+
+#define DEBUGFS_ADD(name)                                              \
+       debugfs_create_file(__stringify(name), 0400,                    \
+                           qcom_socinfo->dbg_root,                     \
+                           qcom_socinfo->socinfo, &qcom_ ##name## _ops)
+
+
+static int qcom_show_build_id(struct seq_file *seq, void *p)
+{
+       struct socinfo *socinfo = seq->private;
+
+       seq_printf(seq, "%s\n", socinfo->build_id);
+
+       return 0;
+}
+
+static int qcom_show_accessory_chip(struct seq_file *seq, void *p)
+{
+       struct socinfo *socinfo = seq->private;
+
+       seq_printf(seq, "%d\n", le32_to_cpu(socinfo->accessory_chip));
+
+       return 0;
+}
+
+static int qcom_show_platform_subtype(struct seq_file *seq, void *p)
+{
+       struct socinfo *socinfo = seq->private;
+       int subtype = le32_to_cpu(socinfo->hw_plat_subtype);
+
+       if (subtype < 0)
+               return -EINVAL;
+
+       seq_printf(seq, "%u\n", subtype);
+
+       return 0;
+}
+
+static int qcom_show_pmic_model(struct seq_file *seq, void *p)
+{
+       struct socinfo *socinfo = seq->private;
+       int model = SOCINFO_MINOR(le32_to_cpu(socinfo->pmic_model));
+
+       if (model < 0)
+               return -EINVAL;
+
+       seq_printf(seq, "%s\n", pmic_model[model]);
+
+       return 0;
+}
+
+static int qcom_show_pmic_die_revision(struct seq_file *seq, void *p)
+{
+       struct socinfo *socinfo = seq->private;
+
+       seq_printf(seq, "%u.%u\n",
+                  SOCINFO_MAJOR(le32_to_cpu(socinfo->pmic_die_rev)),
+                  SOCINFO_MINOR(le32_to_cpu(socinfo->pmic_die_rev)));
+
+       return 0;
+}
+
+UINT_SHOW(raw_version, raw_ver);
+UINT_SHOW(hardware_platform, hw_plat);
+UINT_SHOW(platform_version, plat_ver);
+UINT_SHOW(foundry_id, foundry_id);
+HEX_SHOW(chip_family, chip_family);
+HEX_SHOW(raw_device_family, raw_device_family);
+HEX_SHOW(raw_device_number, raw_device_num);
+QCOM_OPEN(build_id, qcom_show_build_id);
+QCOM_OPEN(accessory_chip, qcom_show_accessory_chip);
+QCOM_OPEN(pmic_model, qcom_show_pmic_model);
+QCOM_OPEN(platform_subtype, qcom_show_platform_subtype);
+QCOM_OPEN(pmic_die_revision, qcom_show_pmic_die_revision);
+
+static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo)
+{
+       qcom_socinfo->dbg_root = debugfs_create_dir("qcom_socinfo", NULL);
+
+       DEBUGFS_UINT_ADD(raw_version);
+       DEBUGFS_UINT_ADD(hardware_platform);
+       DEBUGFS_UINT_ADD(platform_version);
+       DEBUGFS_UINT_ADD(foundry_id);
+       DEBUGFS_HEX_ADD(chip_family);
+       DEBUGFS_HEX_ADD(raw_device_family);
+       DEBUGFS_HEX_ADD(raw_device_number);
+       DEBUGFS_ADD(build_id);
+       DEBUGFS_ADD(accessory_chip);
+       DEBUGFS_ADD(pmic_model);
+       DEBUGFS_ADD(platform_subtype);
+       DEBUGFS_ADD(pmic_die_revision);
+}
+
+static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo)
+{
+       debugfs_remove_recursive(qcom_socinfo->dbg_root);
+}
+#else
+static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo) { return 
0; }
+static void socinfo_debugfs_exit(struct qcom_socinfo *qcom_socinfo) {  }
+#endif /* CONFIG_DEBUG_FS */
+
 static int qcom_socinfo_probe(struct platform_device *pdev)
 {
        struct qcom_socinfo *qs;
@@ -165,6 +357,10 @@ static int qcom_socinfo_probe(struct platform_device *pdev)
        if (IS_ERR(qs->soc_dev))
                return PTR_ERR(qs->soc_dev);
 
+       qs->socinfo = info;
+
+       socinfo_debugfs_init(qs);
+
        /* Feed the soc specific unique data into entropy pool */
        add_device_randomness(info, item_size);
 
@@ -179,6 +375,8 @@ static int qcom_socinfo_remove(struct platform_device *pdev)
 
        soc_device_unregister(qs->soc_dev);
 
+       socinfo_debugfs_exit(qs);
+
        return 0;
 }
 
-- 
2.17.1

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