Re: [PATCH v4 2/6] mfd: cros_ec: Add cros_ec_cmd_xfer_status helper
Thanks Tomeu! Small nit below, other wise looks good to me. On Tue, Mar 8, 2016 at 2:35 AM, Tomeu Vizosowrote: > So that callers of cros_ec_cmd_xfer don't have to repeat boilerplate > code when checking for errors from the EC side. > > Signed-off-by: Tomeu Vizoso > --- > > Changes in v4: None > Changes in v3: None > Changes in v2: None > > drivers/platform/chrome/cros_ec_proto.c | 14 ++ > include/linux/mfd/cros_ec.h | 18 ++ > 2 files changed, 32 insertions(+) > > diff --git a/drivers/platform/chrome/cros_ec_proto.c > b/drivers/platform/chrome/cros_ec_proto.c > index c792e116e621..e45d6750bbdf 100644 > --- a/drivers/platform/chrome/cros_ec_proto.c > +++ b/drivers/platform/chrome/cros_ec_proto.c > @@ -472,3 +472,17 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev) > return get_keyboard_state_event(ec_dev); > } > EXPORT_SYMBOL(cros_ec_get_next_event); > + > +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, > + struct cros_ec_command *msg) > +{ > + int ret = cros_ec_cmd_xfer(ec_dev, msg); > + > + if (ret < 0) > + dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret); > + else if (msg->result) Could you check for if (msg->result != EC_RES_SUCCESS) explicitly? > + return -EECRESULT - msg->result; > + > + return ret; > +} > +EXPORT_SYMBOL(cros_ec_cmd_xfer_status); > diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h > index 1f88418a36cf..b6961c717209 100644 > --- a/include/linux/mfd/cros_ec.h > +++ b/include/linux/mfd/cros_ec.h > @@ -40,6 +40,9 @@ > #define EC_MAX_REQUEST_OVERHEAD1 > #define EC_MAX_RESPONSE_OVERHEAD 2 > > +/* ec_command return value for non-success result from EC */ > +#define EECRESULT 1000 > + > /* > * Command interface between EC and AP, for LPC, I2C and SPI interfaces. > */ > @@ -250,6 +253,21 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, > struct cros_ec_command *msg); > > /** > + * cros_ec_cmd_xfer_status - Send a command to the ChromeOS EC > + * > + * This function is identical to cros_ec_cmd_xfer, except it returns succes > + * status only if both the command was transmitted successfully and the EC > + * replied with success status. It's not necessary to check msg->result when > + * using this function. > + * > + * @ec_dev: EC device > + * @msg: Message to write > + * @return: Num. of bytes transferred on success, <0 on failure > + */ > +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, > + struct cros_ec_command *msg); > + > +/** > * cros_ec_remove - Remove a ChromeOS EC > * > * Call this to deregister a ChromeOS EC, then clean up any private data. > -- > 2.5.0 > -- Benson Leung Senior Software Engineer, Chrom* OS ble...@chromium.org
Re: [PATCH v4 2/6] mfd: cros_ec: Add cros_ec_cmd_xfer_status helper
Thanks Tomeu! Small nit below, other wise looks good to me. On Tue, Mar 8, 2016 at 2:35 AM, Tomeu Vizoso wrote: > So that callers of cros_ec_cmd_xfer don't have to repeat boilerplate > code when checking for errors from the EC side. > > Signed-off-by: Tomeu Vizoso > --- > > Changes in v4: None > Changes in v3: None > Changes in v2: None > > drivers/platform/chrome/cros_ec_proto.c | 14 ++ > include/linux/mfd/cros_ec.h | 18 ++ > 2 files changed, 32 insertions(+) > > diff --git a/drivers/platform/chrome/cros_ec_proto.c > b/drivers/platform/chrome/cros_ec_proto.c > index c792e116e621..e45d6750bbdf 100644 > --- a/drivers/platform/chrome/cros_ec_proto.c > +++ b/drivers/platform/chrome/cros_ec_proto.c > @@ -472,3 +472,17 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev) > return get_keyboard_state_event(ec_dev); > } > EXPORT_SYMBOL(cros_ec_get_next_event); > + > +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, > + struct cros_ec_command *msg) > +{ > + int ret = cros_ec_cmd_xfer(ec_dev, msg); > + > + if (ret < 0) > + dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret); > + else if (msg->result) Could you check for if (msg->result != EC_RES_SUCCESS) explicitly? > + return -EECRESULT - msg->result; > + > + return ret; > +} > +EXPORT_SYMBOL(cros_ec_cmd_xfer_status); > diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h > index 1f88418a36cf..b6961c717209 100644 > --- a/include/linux/mfd/cros_ec.h > +++ b/include/linux/mfd/cros_ec.h > @@ -40,6 +40,9 @@ > #define EC_MAX_REQUEST_OVERHEAD1 > #define EC_MAX_RESPONSE_OVERHEAD 2 > > +/* ec_command return value for non-success result from EC */ > +#define EECRESULT 1000 > + > /* > * Command interface between EC and AP, for LPC, I2C and SPI interfaces. > */ > @@ -250,6 +253,21 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, > struct cros_ec_command *msg); > > /** > + * cros_ec_cmd_xfer_status - Send a command to the ChromeOS EC > + * > + * This function is identical to cros_ec_cmd_xfer, except it returns succes > + * status only if both the command was transmitted successfully and the EC > + * replied with success status. It's not necessary to check msg->result when > + * using this function. > + * > + * @ec_dev: EC device > + * @msg: Message to write > + * @return: Num. of bytes transferred on success, <0 on failure > + */ > +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, > + struct cros_ec_command *msg); > + > +/** > * cros_ec_remove - Remove a ChromeOS EC > * > * Call this to deregister a ChromeOS EC, then clean up any private data. > -- > 2.5.0 > -- Benson Leung Senior Software Engineer, Chrom* OS ble...@chromium.org
[PATCH v4 2/6] mfd: cros_ec: Add cros_ec_cmd_xfer_status helper
So that callers of cros_ec_cmd_xfer don't have to repeat boilerplate code when checking for errors from the EC side. Signed-off-by: Tomeu Vizoso--- Changes in v4: None Changes in v3: None Changes in v2: None drivers/platform/chrome/cros_ec_proto.c | 14 ++ include/linux/mfd/cros_ec.h | 18 ++ 2 files changed, 32 insertions(+) diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index c792e116e621..e45d6750bbdf 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -472,3 +472,17 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev) return get_keyboard_state_event(ec_dev); } EXPORT_SYMBOL(cros_ec_get_next_event); + +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg) +{ + int ret = cros_ec_cmd_xfer(ec_dev, msg); + + if (ret < 0) + dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret); + else if (msg->result) + return -EECRESULT - msg->result; + + return ret; +} +EXPORT_SYMBOL(cros_ec_cmd_xfer_status); diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h index 1f88418a36cf..b6961c717209 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -40,6 +40,9 @@ #define EC_MAX_REQUEST_OVERHEAD1 #define EC_MAX_RESPONSE_OVERHEAD 2 +/* ec_command return value for non-success result from EC */ +#define EECRESULT 1000 + /* * Command interface between EC and AP, for LPC, I2C and SPI interfaces. */ @@ -250,6 +253,21 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, struct cros_ec_command *msg); /** + * cros_ec_cmd_xfer_status - Send a command to the ChromeOS EC + * + * This function is identical to cros_ec_cmd_xfer, except it returns succes + * status only if both the command was transmitted successfully and the EC + * replied with success status. It's not necessary to check msg->result when + * using this function. + * + * @ec_dev: EC device + * @msg: Message to write + * @return: Num. of bytes transferred on success, <0 on failure + */ +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg); + +/** * cros_ec_remove - Remove a ChromeOS EC * * Call this to deregister a ChromeOS EC, then clean up any private data. -- 2.5.0
[PATCH v4 2/6] mfd: cros_ec: Add cros_ec_cmd_xfer_status helper
So that callers of cros_ec_cmd_xfer don't have to repeat boilerplate code when checking for errors from the EC side. Signed-off-by: Tomeu Vizoso --- Changes in v4: None Changes in v3: None Changes in v2: None drivers/platform/chrome/cros_ec_proto.c | 14 ++ include/linux/mfd/cros_ec.h | 18 ++ 2 files changed, 32 insertions(+) diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index c792e116e621..e45d6750bbdf 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -472,3 +472,17 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev) return get_keyboard_state_event(ec_dev); } EXPORT_SYMBOL(cros_ec_get_next_event); + +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg) +{ + int ret = cros_ec_cmd_xfer(ec_dev, msg); + + if (ret < 0) + dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret); + else if (msg->result) + return -EECRESULT - msg->result; + + return ret; +} +EXPORT_SYMBOL(cros_ec_cmd_xfer_status); diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h index 1f88418a36cf..b6961c717209 100644 --- a/include/linux/mfd/cros_ec.h +++ b/include/linux/mfd/cros_ec.h @@ -40,6 +40,9 @@ #define EC_MAX_REQUEST_OVERHEAD1 #define EC_MAX_RESPONSE_OVERHEAD 2 +/* ec_command return value for non-success result from EC */ +#define EECRESULT 1000 + /* * Command interface between EC and AP, for LPC, I2C and SPI interfaces. */ @@ -250,6 +253,21 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, struct cros_ec_command *msg); /** + * cros_ec_cmd_xfer_status - Send a command to the ChromeOS EC + * + * This function is identical to cros_ec_cmd_xfer, except it returns succes + * status only if both the command was transmitted successfully and the EC + * replied with success status. It's not necessary to check msg->result when + * using this function. + * + * @ec_dev: EC device + * @msg: Message to write + * @return: Num. of bytes transferred on success, <0 on failure + */ +int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg); + +/** * cros_ec_remove - Remove a ChromeOS EC * * Call this to deregister a ChromeOS EC, then clean up any private data. -- 2.5.0