From 7c8eb12dbb4c1b43ce705a8ba1a5c9c1191e75d8 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 13 Apr 2016 19:19:04 +0200 Subject: [PATCH] greybus: interface: move vendor and product strings to control device The control device is an abstraction of the control connection over which a greybus manifest is retrieved. As interfaces switch modes (e.g. after boot-over-unipro) they expose new manifests, which can contain different vendor and product strings. Eventually control devices will be deregistered and recreated after an interface mode switch, while the interface itself remains registered. Note that only interfaces of type greybus will have control devices. Specifically, dummy interfaces will not. Signed-off-by: Johan Hovold Reviewed-by: Viresh Kumar Signed-off-by: Greg Kroah-Hartman --- .../greybus/Documentation/sysfs-bus-greybus | 28 +++++++++--------- drivers/staging/greybus/control.c | 29 +++++++++++++++++++ drivers/staging/greybus/control.h | 3 ++ drivers/staging/greybus/interface.c | 7 ----- drivers/staging/greybus/interface.h | 4 --- drivers/staging/greybus/manifest.c | 13 +++++---- 6 files changed, 53 insertions(+), 31 deletions(-) diff --git a/drivers/staging/greybus/Documentation/sysfs-bus-greybus b/drivers/staging/greybus/Documentation/sysfs-bus-greybus index d8bf30e90586..4831efb9d0f7 100644 --- a/drivers/staging/greybus/Documentation/sysfs-bus-greybus +++ b/drivers/staging/greybus/Documentation/sysfs-bus-greybus @@ -52,13 +52,6 @@ Contact: Greg Kroah-Hartman Description: Product ID of a Greybus interface. -What: /sys/bus/greybus/device/N-I/product_string -Date: October 2015 -KernelVersion: 4.XX -Contact: Greg Kroah-Hartman -Description: - Product ID string of a Greybus interface. - What: /sys/bus/greybus/device/N-I/vendor_id Date: October 2015 KernelVersion: 4.XX @@ -66,13 +59,6 @@ Contact: Greg Kroah-Hartman Description: Vendor ID of a Greybus interface. -What: /sys/bus/greybus/device/N-I/vendor_string -Date: October 2015 -KernelVersion: 4.XX -Contact: Greg Kroah-Hartman -Description: - Vendor ID string of a Greybus interface block. - What: /sys/bus/greybus/device/N-I/version Date: October 2015 KernelVersion: 4.XX @@ -110,6 +96,20 @@ Description: A bundle B on the Interface I, B is replaced by a 1-byte number representing the bundle. +What: /sys/bus/greybus/device/N-I.ctrl/product_string +Date: October 2015 +KernelVersion: 4.XX +Contact: Greg Kroah-Hartman +Description: + Product ID string of a Greybus interface. + +What: /sys/bus/greybus/device/N-I.ctrl/vendor_string +Date: October 2015 +KernelVersion: 4.XX +Contact: Greg Kroah-Hartman +Description: + Vendor ID string of a Greybus interface. + What: /sys/bus/greybus/device/N-I.B/bundle_class Date: October 2015 KernelVersion: 4.XX diff --git a/drivers/staging/greybus/control.c b/drivers/staging/greybus/control.c index 606361906482..58a3d6089701 100644 --- a/drivers/staging/greybus/control.c +++ b/drivers/staging/greybus/control.c @@ -213,12 +213,40 @@ int gb_control_timesync_authoritative(struct gb_control *control, NULL, 0); } +static ssize_t vendor_string_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct gb_control *control = to_gb_control(dev); + + return scnprintf(buf, PAGE_SIZE, "%s\n", control->vendor_string); +} +static DEVICE_ATTR_RO(vendor_string); + +static ssize_t product_string_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct gb_control *control = to_gb_control(dev); + + return scnprintf(buf, PAGE_SIZE, "%s\n", control->product_string); +} +static DEVICE_ATTR_RO(product_string); + +static struct attribute *control_attrs[] = { + &dev_attr_vendor_string.attr, + &dev_attr_product_string.attr, + NULL, +}; +ATTRIBUTE_GROUPS(control); + static void gb_control_release(struct device *dev) { struct gb_control *control = to_gb_control(dev); gb_connection_destroy(control->connection); + kfree(control->vendor_string); + kfree(control->product_string); + kfree(control); } @@ -249,6 +277,7 @@ struct gb_control *gb_control_create(struct gb_interface *intf) control->dev.parent = &intf->dev; control->dev.bus = &greybus_bus_type; control->dev.type = &greybus_control_type; + control->dev.groups = control_groups; control->dev.dma_mask = intf->dev.dma_mask; device_initialize(&control->dev); dev_set_name(&control->dev, "%s.ctrl", dev_name(&intf->dev)); diff --git a/drivers/staging/greybus/control.h b/drivers/staging/greybus/control.h index 102e937a982c..56fa2592762b 100644 --- a/drivers/staging/greybus/control.h +++ b/drivers/staging/greybus/control.h @@ -20,6 +20,9 @@ struct gb_control { u8 protocol_minor; bool has_bundle_version; + + char *vendor_string; + char *product_string; }; #define to_gb_control(d) container_of(d, struct gb_control, dev) diff --git a/drivers/staging/greybus/interface.c b/drivers/staging/greybus/interface.c index e0e08731c055..ed56f2de7dbd 100644 --- a/drivers/staging/greybus/interface.c +++ b/drivers/staging/greybus/interface.c @@ -249,8 +249,6 @@ gb_interface_attr(ddbl1_product_id, "0x%08x"); gb_interface_attr(interface_id, "%u"); gb_interface_attr(vendor_id, "0x%08x"); gb_interface_attr(product_id, "0x%08x"); -gb_interface_attr(vendor_string, "%s"); -gb_interface_attr(product_string, "%s"); gb_interface_attr(serial_number, "0x%016llx"); static ssize_t version_show(struct device *dev, struct device_attribute *attr, @@ -326,8 +324,6 @@ static struct attribute *interface_attrs[] = { &dev_attr_interface_id.attr, &dev_attr_vendor_id.attr, &dev_attr_product_id.attr, - &dev_attr_vendor_string.attr, - &dev_attr_product_string.attr, &dev_attr_serial_number.attr, &dev_attr_version.attr, &dev_attr_voltage_now.attr, @@ -356,9 +352,6 @@ static void gb_interface_release(struct device *dev) { struct gb_interface *intf = to_gb_interface(dev); - kfree(intf->product_string); - kfree(intf->vendor_string); - if (intf->control) gb_control_put(intf->control); diff --git a/drivers/staging/greybus/interface.h b/drivers/staging/greybus/interface.h index 15c687f5dbc1..567b6c8ae713 100644 --- a/drivers/staging/greybus/interface.h +++ b/drivers/staging/greybus/interface.h @@ -25,10 +25,6 @@ struct gb_interface { u8 interface_id; /* Physical location within the Endo */ u8 device_id; - /* Information taken from the manifest descriptor */ - char *vendor_string; - char *product_string; - u32 ddbl1_manufacturer_id; u32 ddbl1_product_id; u32 vendor_id; diff --git a/drivers/staging/greybus/manifest.c b/drivers/staging/greybus/manifest.c index cca4592c15ad..886c5fb91d9f 100644 --- a/drivers/staging/greybus/manifest.c +++ b/drivers/staging/greybus/manifest.c @@ -384,18 +384,19 @@ static bool gb_manifest_parse_interface(struct gb_interface *intf, struct manifest_desc *interface_desc) { struct greybus_descriptor_interface *desc_intf = interface_desc->data; + struct gb_control *control = intf->control; char *str; /* Handle the strings first--they can fail */ str = gb_string_get(intf, desc_intf->vendor_stringid); if (IS_ERR(str)) return false; - intf->vendor_string = str; + control->vendor_string = str; str = gb_string_get(intf, desc_intf->product_stringid); if (IS_ERR(str)) goto out_free_vendor_string; - intf->product_string = str; + control->product_string = str; /* Release the interface descriptor, now that we're done with it */ release_manifest_descriptor(interface_desc); @@ -408,11 +409,11 @@ static bool gb_manifest_parse_interface(struct gb_interface *intf, return true; out_err: - kfree(intf->product_string); - intf->product_string = NULL; + kfree(control->product_string); + control->product_string = NULL; out_free_vendor_string: - kfree(intf->vendor_string); - intf->vendor_string = NULL; + kfree(control->vendor_string); + control->vendor_string = NULL; return false; }