| Message ID | 1623237532-20829-1-git-send-email-sibis@codeaurora.org |
|---|---|
| Headers | show |
| Series | soc: qcom: aoss: Expose send for generic usecase | expand |
On Wed 09 Jun 06:18 CDT 2021, Sibi Sankar wrote: > From: Deepak Kumar Singh <deesin@codeaurora.org> > > It can be useful to control the different power states of various > parts of hardware for device testing. Add a debugfs node for qmp so > messages can be sent to aoss for debugging and testing purposes. > I thought I replied to this patch, but can't find the reply... > Signed-off-by: Chris Lew <clew@codeaurora.org> > Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org> > Signed-off-by: Sibi Sankar <sibis@codeaurora.org> > --- > drivers/soc/qcom/qcom_aoss.c | 39 +++++++++++++++++++++++++++++++++++++++ > 1 file changed, 39 insertions(+) > > diff --git a/drivers/soc/qcom/qcom_aoss.c b/drivers/soc/qcom/qcom_aoss.c > index e8f48760bac8..998ee7605eb2 100644 > --- a/drivers/soc/qcom/qcom_aoss.c > +++ b/drivers/soc/qcom/qcom_aoss.c > @@ -4,6 +4,7 @@ > */ > #include <dt-bindings/power/qcom-aoss-qmp.h> > #include <linux/clk-provider.h> > +#include <linux/debugfs.h> > #include <linux/interrupt.h> > #include <linux/io.h> > #include <linux/mailbox_client.h> > @@ -89,6 +90,9 @@ struct qmp { > struct clk_hw qdss_clk; > struct genpd_onecell_data pd_data; > struct qmp_cooling_device *cooling_devs; > +#if IS_ENABLED(CONFIG_DEBUG_FS) > + struct dentry *debugfs_file; > +#endif /* CONFIG_DEBUG_FS */ > }; > > struct qmp_pd { > @@ -575,6 +579,32 @@ void qmp_put(struct qmp *qmp) > } > EXPORT_SYMBOL(qmp_put); > > +#if IS_ENABLED(CONFIG_DEBUG_FS) > +static ssize_t aoss_dbg_write(struct file *file, const char __user *userstr, > + size_t len, loff_t *pos) > +{ > + struct qmp *qmp = file->private_data; > + char buf[QMP_MSG_LEN] = {}; > + int ret; > + > + if (!len || len >= QMP_MSG_LEN) > + return len; > + > + ret = copy_from_user(buf, userstr, len); > + if (ret) > + return len; > + > + ret = qmp_send(qmp, buf, QMP_MSG_LEN); > + > + return ret ? ret : len; > +} > + > +static const struct file_operations aoss_dbg_fops = { > + .open = simple_open, > + .write = aoss_dbg_write, > +}; > +#endif /* CONFIG_DEBUG_FS */ > + > static int qmp_probe(struct platform_device *pdev) > { > struct resource *res; > @@ -632,6 +662,11 @@ static int qmp_probe(struct platform_device *pdev) > > atomic_set(&qmp->orphan, 0); > > +#if IS_ENABLED(CONFIG_DEBUG_FS) > + qmp->debugfs_file = debugfs_create_file("aoss_send_message", 0220, NULL, > + qmp, &aoss_dbg_fops); > +#endif /* CONFIG_DEBUG_FS */ You shouldn't need the guards, debugfs_create_file() is stubbed if CONFIG_DEBUG_FS isn't set, so it's better to just rely on that. Regards, Bjorn > + > return 0; > > err_remove_qdss_clk: > @@ -649,6 +684,10 @@ static int qmp_remove(struct platform_device *pdev) > { > struct qmp *qmp = platform_get_drvdata(pdev); > > +#if IS_ENABLED(CONFIG_DEBUG_FS) > + debugfs_remove(qmp->debugfs_file); > +#endif /* CONFIG_DEBUG_FS */ > + > qmp_qdss_clk_remove(qmp); > qmp_pd_remove(qmp); > qmp_cooling_devices_remove(qmp); > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >