diff options
author | Lee Jones <lee.jones@linaro.org> | 2016-01-12 12:46:17 (GMT) |
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committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2016-01-30 01:26:48 (GMT) |
commit | 69e50479bd6b99a377223104be46f7b894ca4208 (patch) | |
tree | cb71096d5d3abf96fef4f6e4af5406ce238a75e0 /drivers | |
parent | 6cb0e0f6a46a6c2f1d6f9d4a0539f2ed7d8487fb (diff) | |
download | linux-69e50479bd6b99a377223104be46f7b894ca4208.tar.xz |
remoteproc: debugfs: Add ability to boot remote processor using debugfs
This functionality is especially useful during the testing phase. When
used in conjunction with Mailbox's Test Framework we can trivially conduct
end-to-end testing i.e. boot co-processor, send and receive messages to
the co-processor, then shut it down again (repeat as required).
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/remoteproc/remoteproc_debugfs.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c index 6fdfa68..74a120b 100644 --- a/drivers/remoteproc/remoteproc_debugfs.c +++ b/drivers/remoteproc/remoteproc_debugfs.c @@ -88,8 +88,42 @@ static ssize_t rproc_state_read(struct file *filp, char __user *userbuf, return simple_read_from_buffer(userbuf, count, ppos, buf, i); } +static ssize_t rproc_state_write(struct file *filp, const char __user *userbuf, + size_t count, loff_t *ppos) +{ + struct rproc *rproc = filp->private_data; + char buf[10]; + int ret; + + if (count > sizeof(buf) || count <= 0) + return -EINVAL; + + ret = copy_from_user(buf, userbuf, count); + if (ret) + return -EFAULT; + + if (buf[count - 1] == '\n') + buf[count - 1] = '\0'; + + if (!strncmp(buf, "start", count)) { + ret = rproc_boot(rproc); + if (ret) { + dev_err(&rproc->dev, "Boot failed: %d\n", ret); + return ret; + } + } else if (!strncmp(buf, "stop", count)) { + rproc_shutdown(rproc); + } else { + dev_err(&rproc->dev, "Unrecognised option: %s\n", buf); + return -EINVAL; + } + + return count; +} + static const struct file_operations rproc_state_ops = { .read = rproc_state_read, + .write = rproc_state_write, .open = simple_open, .llseek = generic_file_llseek, }; |