Il 14/06/22 18:57, Prashant Malani ha scritto:
On Tue, Jun 14, 2022 at 1:18 AM AngeloGioacchino Del Regno
<angelogioacchino.delregno@xxxxxxxxxxxxx> wrote:
Il 09/06/22 20:09, Prashant Malani ha scritto:
When the DT node has "switches" available, register a Type-C mode-switch
for each listed "switch". This allows the driver to receive state
information about what operating mode a Type-C port and its connected
peripherals are in, as well as status information (like VDOs) related to
that state.
The callback function is currently a stub, but subsequent patches will
implement the required functionality.
Signed-off-by: Prashant Malani <pmalani@xxxxxxxxxxxx>
---
Changes since v2:
- No changes.
drivers/gpu/drm/bridge/analogix/anx7625.c | 73 +++++++++++++++++++++++
drivers/gpu/drm/bridge/analogix/anx7625.h | 6 ++
2 files changed, 79 insertions(+)
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 07ed44c6b839..d41a21103bd3 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -15,6 +15,7 @@
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/types.h>
+#include <linux/usb/typec_mux.h>
#include <linux/workqueue.h>
#include <linux/of_gpio.h>
@@ -2581,9 +2582,59 @@ static void anx7625_runtime_disable(void *data)
pm_runtime_disable(data);
}
+static int anx7625_typec_mux_set(struct typec_mux_dev *mux,
+ struct typec_mux_state *state)
+{
+ return 0;
+}
+
+static int anx7625_register_mode_switch(struct device *dev, struct device_node *node,
+ struct anx7625_data *ctx)
+{
+ struct anx7625_port_data *port_data;
+ struct typec_mux_desc mux_desc = {};
+ char name[32];
+ u32 port_num;
+ int ret;
+
+ ret = of_property_read_u32(node, "reg", &port_num);
+ if (ret)
+ return ret;
+
+ if (port_num >= ctx->num_typec_switches) {
+ dev_err(dev, "Invalid port number specified: %d\n", port_num);
+ return -EINVAL;
+ }
+
+ port_data = &ctx->typec_ports[port_num];
+ port_data->ctx = ctx;
+ mux_desc.fwnode = &node->fwnode;
+ mux_desc.drvdata = port_data;
+ snprintf(name, sizeof(name), "%s-%u", node->name, port_num);
+ mux_desc.name = name;
+ mux_desc.set = anx7625_typec_mux_set;
+
+ port_data->typec_mux = typec_mux_register(dev, &mux_desc);
+ if (IS_ERR(port_data->typec_mux)) {
+ ret = PTR_ERR(port_data->typec_mux);
+ dev_err(dev, "Mode switch register for port %d failed: %d", port_num, ret);
+ }
Please return 0 at the end of this function.
if (IS_ERR(....)) {
......code......
return ret;
}
return 0;
}
May I ask why? We're not missing any return paths. I would rather we
keep it as is (which has the valid return value).
I know that you're not missing any return paths.
That's only because the proposed one is a common pattern in the kernel
and it's only for consistency.
Regards,
Angelo
