diff options
| author | chenjh <chenjh@rock-chips.com> | 2017-02-15 19:48:03 +0800 |
|---|---|---|
| committer | Huang, Tao <huangtao@rock-chips.com> | 2017-02-17 17:18:56 +0800 |
| commit | 2c7a28a62b58feb44822741329d36dd4927a05df (patch) | |
| tree | 1ee9329c0c4647017c98d1c9d40f2fccb711228e | |
| parent | 491ae057f1a2c480933c265c96ce4890a602c037 (diff) | |
mfd: rk808: add sysfs debug node "/sys/rk8xx/rk8xx_dbg"
Change-Id: I197dc97b7337414a7d52426da0e0cb8c7480c917
Signed-off-by: chenjh <chenjh@rock-chips.com>
| -rw-r--r-- | drivers/mfd/rk808.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c index 9d9327828ca5..60b4a628b281 100644 --- a/drivers/mfd/rk808.c +++ b/drivers/mfd/rk808.c @@ -467,6 +467,54 @@ static void rk808_device_shutdown(void) } } +static ssize_t rk8xx_dbg_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int ret; + char cmd; + u32 input[2], addr, data; + struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client); + + ret = sscanf(buf, "%c ", &cmd); + switch (cmd) { + case 'w': + ret = sscanf(buf, "%c %x %x ", &cmd, &input[0], &input[1]); + if (ret != 3) { + pr_err("erro! cmd format: echo w [addr] [value]\n"); + goto out; + }; + addr = input[0] & 0xff; + data = input[1] & 0xff; + pr_info("cmd : %c %x %x\n\n", cmd, input[0], input[1]); + regmap_write(rk808->regmap, addr, data); + regmap_read(rk808->regmap, addr, &data); + pr_info("new: %x %x\n", addr, data); + break; + case 'r': + ret = sscanf(buf, "%c %x ", &cmd, &input[0]); + if (ret != 2) { + pr_err("erro! cmd format: echo r [addr]\n"); + goto out; + }; + pr_info("cmd : %c %x\n\n", cmd, input[0]); + addr = input[0] & 0xff; + regmap_read(rk808->regmap, addr, &data); + pr_info("%x %x\n", input[0], data); + break; + default: + pr_err("Unknown command\n"); + break; + } + +out: + return count; +} + +static struct kobject *rk8xx_kobj; +static struct device_attribute rk8xx_attrs = + __ATTR(rk8xx_dbg, 0200, NULL, rk8xx_dbg_store); + static const struct of_device_id rk808_of_match[] = { { .compatible = "rockchip,rk805" }, { .compatible = "rockchip,rk808" }, @@ -628,6 +676,13 @@ static int rk808_probe(struct i2c_client *client, } } + rk8xx_kobj = kobject_create_and_add("rk8xx", NULL); + if (rk8xx_kobj) { + ret = sysfs_create_file(rk8xx_kobj, &rk8xx_attrs.attr); + if (ret) + dev_err(&client->dev, "create rk8xx sysfs error\n"); + } + return 0; err_irq: |