* [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. @ 2018-04-12 21:33 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-12 21:33 UTC (permalink / raw) To: linux-i2c, hansens, wsa, corbet, linux-doc, linux-kernel Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* helper routines as static inlined functions provided by linux/i2c-dev.h. Work has been done to refactor the linux/i2c-dev.h file in the i2c-tools project out into its own library. As a result, these docs have become stale. This patch corrects the discrepancy and directs the reader to the i2c-tools project for more information. Additionally, some trailing-whitespace cleanups were made. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 28 +++++++++++----------------- 1 file changed, 11 insertions(+), 17 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index d04e6e4964ee..5323588fe99d 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -9,8 +9,8 @@ i2c adapters present on your system at a given time. i2cdetect is part of the i2c-tools package. I2C device files are character device files with major device number 89 -and a minor device number corresponding to the number assigned as -explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., +and a minor device number corresponding to the number assigned as +explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., i2c-10, ...). All 256 minor device numbers are reserved for i2c. @@ -23,11 +23,6 @@ First, you need to include these two headers: #include <linux/i2c-dev.h> #include <i2c/smbus.h> -(Please note that there are two files named "i2c-dev.h" out there. One is -distributed with the Linux kernel and the other one is included in the -source tree of i2c-tools. They used to be different in content but since 2012 -they're identical. You should use "linux/i2c-dev.h"). - Now, you have to decide which adapter you want to access. You should inspect /sys/class/i2c-dev/ or run "i2cdetect -l" to decide this. Adapter numbers are assigned somewhat dynamically, so you can not @@ -38,7 +33,7 @@ Next thing, open the device file, as follows: int file; int adapter_nr = 2; /* probably dynamically determined */ char filename[20]; - + snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { @@ -72,7 +67,7 @@ the device supports them. Both are illustrated below. /* res contains the read word */ } - /* Using I2C Write, equivalent of + /* Using I2C Write, equivalent of i2c_smbus_write_word_data(file, reg, 0x6543) */ buf[0] = reg; buf[1] = 0x43; @@ -140,14 +135,14 @@ ioctl(file, I2C_RDWR, struct i2c_rdwr_ioctl_data *msgset) set in each message, overriding the values set with the above ioctl's. ioctl(file, I2C_SMBUS, struct i2c_smbus_ioctl_data *args) - Not meant to be called directly; instead, use the access functions - below. + If possible, use the provided i2c_smbus_* methods described below in favor + of issuing direct ioctls. You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through ioctl I2C_SLAVE before you try to access the device. -You can do SMBus level transactions (see documentation file smbus-protocol +You can do SMBus level transactions (see documentation file smbus-protocol for details) through the following functions: __s32 i2c_smbus_write_quick(int file, __u8 value); __s32 i2c_smbus_read_byte(int file); @@ -158,7 +153,7 @@ for details) through the following functions: __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value); __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value); __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values); - __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, + __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, __u8 *values); All these transactions return -1 on failure; you can read errno to see what happened. The 'write' transactions return 0 on success; the @@ -166,10 +161,9 @@ what happened. The 'write' transactions return 0 on success; the returns the number of values read. The block buffers need not be longer than 32 bytes. -The above functions are all inline functions, that resolve to calls to -the i2c_smbus_access function, that on its turn calls a specific ioctl -with the data in a specific format. Read the source code if you -want to know what happens behind the screens. +The above functions are made available by linking against the libi2c library, +which is provided by the i2c-tools project. See: +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. Implementation details -- 2.17.0.484.g0c8726318c-goog ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. @ 2018-04-12 21:33 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-12 21:33 UTC (permalink / raw) To: linux-i2c, hansens, wsa, corbet, linux-doc, linux-kernel Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* helper routines as static inlined functions provided by linux/i2c-dev.h. Work has been done to refactor the linux/i2c-dev.h file in the i2c-tools project out into its own library. As a result, these docs have become stale. This patch corrects the discrepancy and directs the reader to the i2c-tools project for more information. Additionally, some trailing-whitespace cleanups were made. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 28 +++++++++++----------------- 1 file changed, 11 insertions(+), 17 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index d04e6e4964ee..5323588fe99d 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -9,8 +9,8 @@ i2c adapters present on your system at a given time. i2cdetect is part of the i2c-tools package. I2C device files are character device files with major device number 89 -and a minor device number corresponding to the number assigned as -explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., +and a minor device number corresponding to the number assigned as +explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., i2c-10, ...). All 256 minor device numbers are reserved for i2c. @@ -23,11 +23,6 @@ First, you need to include these two headers: #include <linux/i2c-dev.h> #include <i2c/smbus.h> -(Please note that there are two files named "i2c-dev.h" out there. One is -distributed with the Linux kernel and the other one is included in the -source tree of i2c-tools. They used to be different in content but since 2012 -they're identical. You should use "linux/i2c-dev.h"). - Now, you have to decide which adapter you want to access. You should inspect /sys/class/i2c-dev/ or run "i2cdetect -l" to decide this. Adapter numbers are assigned somewhat dynamically, so you can not @@ -38,7 +33,7 @@ Next thing, open the device file, as follows: int file; int adapter_nr = 2; /* probably dynamically determined */ char filename[20]; - + snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { @@ -72,7 +67,7 @@ the device supports them. Both are illustrated below. /* res contains the read word */ } - /* Using I2C Write, equivalent of + /* Using I2C Write, equivalent of i2c_smbus_write_word_data(file, reg, 0x6543) */ buf[0] = reg; buf[1] = 0x43; @@ -140,14 +135,14 @@ ioctl(file, I2C_RDWR, struct i2c_rdwr_ioctl_data *msgset) set in each message, overriding the values set with the above ioctl's. ioctl(file, I2C_SMBUS, struct i2c_smbus_ioctl_data *args) - Not meant to be called directly; instead, use the access functions - below. + If possible, use the provided i2c_smbus_* methods described below in favor + of issuing direct ioctls. You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through ioctl I2C_SLAVE before you try to access the device. -You can do SMBus level transactions (see documentation file smbus-protocol +You can do SMBus level transactions (see documentation file smbus-protocol for details) through the following functions: __s32 i2c_smbus_write_quick(int file, __u8 value); __s32 i2c_smbus_read_byte(int file); @@ -158,7 +153,7 @@ for details) through the following functions: __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value); __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value); __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values); - __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, + __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, __u8 *values); All these transactions return -1 on failure; you can read errno to see what happened. The 'write' transactions return 0 on success; the @@ -166,10 +161,9 @@ what happened. The 'write' transactions return 0 on success; the returns the number of values read. The block buffers need not be longer than 32 bytes. -The above functions are all inline functions, that resolve to calls to -the i2c_smbus_access function, that on its turn calls a specific ioctl -with the data in a specific format. Read the source code if you -want to know what happens behind the screens. +The above functions are made available by linking against the libi2c library, +which is provided by the i2c-tools project. See: +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. Implementation details -- 2.17.0.484.g0c8726318c-goog -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. @ 2018-04-12 21:33 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-12 21:33 UTC (permalink / raw) To: linux-i2c; +Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* helper routines as static inlined functions provided by linux/i2c-dev.h. Work has been done to refactor the linux/i2c-dev.h file in the i2c-tools project out into its own library. As a result, these docs have become stale. This patch corrects the discrepancy and directs the reader to the i2c-tools project for more information. Additionally, some trailing-whitespace cleanups were made. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 28 +++++++++++----------------- 1 file changed, 11 insertions(+), 17 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index d04e6e4964ee..5323588fe99d 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -9,8 +9,8 @@ i2c adapters present on your system at a given time. i2cdetect is part of the i2c-tools package. I2C device files are character device files with major device number 89 -and a minor device number corresponding to the number assigned as -explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., +and a minor device number corresponding to the number assigned as +explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., i2c-10, ...). All 256 minor device numbers are reserved for i2c. @@ -23,11 +23,6 @@ First, you need to include these two headers: #include <linux/i2c-dev.h> #include <i2c/smbus.h> -(Please note that there are two files named "i2c-dev.h" out there. One is -distributed with the Linux kernel and the other one is included in the -source tree of i2c-tools. They used to be different in content but since 2012 -they're identical. You should use "linux/i2c-dev.h"). - Now, you have to decide which adapter you want to access. You should inspect /sys/class/i2c-dev/ or run "i2cdetect -l" to decide this. Adapter numbers are assigned somewhat dynamically, so you can not @@ -38,7 +33,7 @@ Next thing, open the device file, as follows: int file; int adapter_nr = 2; /* probably dynamically determined */ char filename[20]; - + snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { @@ -72,7 +67,7 @@ the device supports them. Both are illustrated below. /* res contains the read word */ } - /* Using I2C Write, equivalent of + /* Using I2C Write, equivalent of i2c_smbus_write_word_data(file, reg, 0x6543) */ buf[0] = reg; buf[1] = 0x43; @@ -140,14 +135,14 @@ ioctl(file, I2C_RDWR, struct i2c_rdwr_ioctl_data *msgset) set in each message, overriding the values set with the above ioctl's. ioctl(file, I2C_SMBUS, struct i2c_smbus_ioctl_data *args) - Not meant to be called directly; instead, use the access functions - below. + If possible, use the provided i2c_smbus_* methods described below in favor + of issuing direct ioctls. You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through ioctl I2C_SLAVE before you try to access the device. -You can do SMBus level transactions (see documentation file smbus-protocol +You can do SMBus level transactions (see documentation file smbus-protocol for details) through the following functions: __s32 i2c_smbus_write_quick(int file, __u8 value); __s32 i2c_smbus_read_byte(int file); @@ -158,7 +153,7 @@ for details) through the following functions: __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value); __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value); __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values); - __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, + __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, __u8 *values); All these transactions return -1 on failure; you can read errno to see what happened. The 'write' transactions return 0 on success; the @@ -166,10 +161,9 @@ what happened. The 'write' transactions return 0 on success; the returns the number of values read. The block buffers need not be longer than 32 bytes. -The above functions are all inline functions, that resolve to calls to -the i2c_smbus_access function, that on its turn calls a specific ioctl -with the data in a specific format. Read the source code if you -want to know what happens behind the screens. +The above functions are made available by linking against the libi2c library, +which is provided by the i2c-tools project. See: +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. Implementation details -- 2.17.0.484.g0c8726318c-goog ^ permalink raw reply related [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. 2018-04-12 21:33 ` Sam Hansen (?) (?) @ 2018-04-12 22:24 ` Wolfram Sang 2018-04-13 12:13 ` Jean Delvare -1 siblings, 1 reply; 29+ messages in thread From: Wolfram Sang @ 2018-04-12 22:24 UTC (permalink / raw) To: Sam Hansen; +Cc: linux-i2c, corbet, linux-doc, linux-kernel, Jean Delvare [-- Attachment #1: Type: text/plain, Size: 1664 bytes --] Hi, On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: > Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* > helper routines as static inlined functions provided by linux/i2c-dev.h. Work > has been done to refactor the linux/i2c-dev.h file in the i2c-tools project > out into its own library. As a result, these docs have become stale. Thanks for fixing this! > This patch corrects the discrepancy and directs the reader to the i2c-tools > project for more information. Additionally, some trailing-whitespace cleanups > were made. Minor nit: Having the whitespace changes in a seperate patch is a tad easier to review. > - /* Using I2C Write, equivalent of > + /* Using I2C Write, equivalent of > i2c_smbus_write_word_data(file, reg, 0x6543) */ Maybe change to Kernel coding style comments while here? > - Not meant to be called directly; instead, use the access functions > - below. > + If possible, use the provided i2c_smbus_* methods described below in favor > + of issuing direct ioctls. Why this change? > -The above functions are all inline functions, that resolve to calls to > -the i2c_smbus_access function, that on its turn calls a specific ioctl > -with the data in a specific format. Read the source code if you > -want to know what happens behind the screens. > +The above functions are made available by linking against the libi2c library, > +which is provided by the i2c-tools project. See: > +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. This is fine with me. Maybe Jean has a comment on this? Kind regards, Wolfram [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 833 bytes --] ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. 2018-04-12 22:24 ` Wolfram Sang @ 2018-04-13 12:13 ` Jean Delvare 0 siblings, 0 replies; 29+ messages in thread From: Jean Delvare @ 2018-04-13 12:13 UTC (permalink / raw) To: Wolfram Sang; +Cc: Sam Hansen, linux-i2c, corbet, linux-doc, linux-kernel Hi Wolfram, Sam, On Fri, 13 Apr 2018 00:24:57 +0200, Wolfram Sang wrote: > On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: > > Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* > > helper routines as static inlined functions provided by linux/i2c-dev.h. Work > > has been done to refactor the linux/i2c-dev.h file in the i2c-tools project > > out into its own library. As a result, these docs have become stale. > > Thanks for fixing this! > > > This patch corrects the discrepancy and directs the reader to the i2c-tools > > project for more information. Additionally, some trailing-whitespace cleanups > > were made. > > Minor nit: Having the whitespace changes in a seperate patch is a tad > easier to review. > > > - /* Using I2C Write, equivalent of > > + /* Using I2C Write, equivalent of > > i2c_smbus_write_word_data(file, reg, 0x6543) */ > > Maybe change to Kernel coding style comments while here? > > > - Not meant to be called directly; instead, use the access functions > > - below. > > + If possible, use the provided i2c_smbus_* methods described below in favor > > + of issuing direct ioctls. > > Why this change? I'm also not sure if "in favor of" is right. "instead of" would sound better to me, but I'm no native English speaker, I could be wrong. > > -The above functions are all inline functions, that resolve to calls to > > -the i2c_smbus_access function, that on its turn calls a specific ioctl > > -with the data in a specific format. Read the source code if you > > -want to know what happens behind the screens. > > +The above functions are made available by linking against the libi2c library, > > +which is provided by the i2c-tools project. See: > > +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. > > This is fine with me. Maybe Jean has a comment on this? Fixing the documentation is always welcome, thanks Sam for stepping in. However we really want separate patches for whitespace fixes and actual contents change, as Wolfram already mentioned above. -- Jean Delvare SUSE L3 Support ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. @ 2018-04-13 12:13 ` Jean Delvare 0 siblings, 0 replies; 29+ messages in thread From: Jean Delvare @ 2018-04-13 12:13 UTC (permalink / raw) To: Wolfram Sang; +Cc: Sam Hansen, linux-i2c, corbet, linux-doc, linux-kernel Hi Wolfram, Sam, On Fri, 13 Apr 2018 00:24:57 +0200, Wolfram Sang wrote: > On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: > > Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* > > helper routines as static inlined functions provided by linux/i2c-dev.h. Work > > has been done to refactor the linux/i2c-dev.h file in the i2c-tools project > > out into its own library. As a result, these docs have become stale. > > Thanks for fixing this! > > > This patch corrects the discrepancy and directs the reader to the i2c-tools > > project for more information. Additionally, some trailing-whitespace cleanups > > were made. > > Minor nit: Having the whitespace changes in a seperate patch is a tad > easier to review. > > > - /* Using I2C Write, equivalent of > > + /* Using I2C Write, equivalent of > > i2c_smbus_write_word_data(file, reg, 0x6543) */ > > Maybe change to Kernel coding style comments while here? > > > - Not meant to be called directly; instead, use the access functions > > - below. > > + If possible, use the provided i2c_smbus_* methods described below in favor > > + of issuing direct ioctls. > > Why this change? I'm also not sure if "in favor of" is right. "instead of" would sound better to me, but I'm no native English speaker, I could be wrong. > > -The above functions are all inline functions, that resolve to calls to > > -the i2c_smbus_access function, that on its turn calls a specific ioctl > > -with the data in a specific format. Read the source code if you > > -want to know what happens behind the screens. > > +The above functions are made available by linking against the libi2c library, > > +which is provided by the i2c-tools project. See: > > +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. > > This is fine with me. Maybe Jean has a comment on this? Fixing the documentation is always welcome, thanks Sam for stepping in. However we really want separate patches for whitespace fixes and actual contents change, as Wolfram already mentioned above. -- Jean Delvare SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. 2018-04-13 12:13 ` Jean Delvare @ 2018-04-13 16:02 ` Sam Hansen -1 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:02 UTC (permalink / raw) To: Jean Delvare; +Cc: Wolfram Sang, linux-i2c, corbet, linux-doc, linux-kernel On Fri, Apr 13, 2018 at 5:13 AM, Jean Delvare <jdelvare@suse.de> wrote: > Hi Wolfram, Sam, > > On Fri, 13 Apr 2018 00:24:57 +0200, Wolfram Sang wrote: >> On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: >> > Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* >> > helper routines as static inlined functions provided by linux/i2c-dev.h. Work >> > has been done to refactor the linux/i2c-dev.h file in the i2c-tools project >> > out into its own library. As a result, these docs have become stale. >> >> Thanks for fixing this! >> >> > This patch corrects the discrepancy and directs the reader to the i2c-tools >> > project for more information. Additionally, some trailing-whitespace cleanups >> > were made. >> >> Minor nit: Having the whitespace changes in a seperate patch is a tad >> easier to review. >> >> > - /* Using I2C Write, equivalent of >> > + /* Using I2C Write, equivalent of >> > i2c_smbus_write_word_data(file, reg, 0x6543) */ >> >> Maybe change to Kernel coding style comments while here? >> >> > - Not meant to be called directly; instead, use the access functions >> > - below. >> > + If possible, use the provided i2c_smbus_* methods described below in favor >> > + of issuing direct ioctls. >> >> Why this change? > > I'm also not sure if "in favor of" is right. "instead of" would sound > better to me, but I'm no native English speaker, I could be wrong. Sounds good, I'll adopt "instead of". Regarding Wolfram's earlier comment, as an engineer, requiring an out-of-tree library to build drivers felt a little off. I can revert this section if you want, just let me know. > >> > -The above functions are all inline functions, that resolve to calls to >> > -the i2c_smbus_access function, that on its turn calls a specific ioctl >> > -with the data in a specific format. Read the source code if you >> > -want to know what happens behind the screens. >> > +The above functions are made available by linking against the libi2c library, >> > +which is provided by the i2c-tools project. See: >> > +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. >> >> This is fine with me. Maybe Jean has a comment on this? > > Fixing the documentation is always welcome, thanks Sam for stepping in. > However we really want separate patches for whitespace fixes and actual > contents change, as Wolfram already mentioned above. Will do! I'll send a v2 patch set, thanks. > > -- > Jean Delvare > SUSE L3 Support ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. @ 2018-04-13 16:02 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:02 UTC (permalink / raw) To: Jean Delvare; +Cc: Wolfram Sang, linux-i2c, corbet, linux-doc, linux-kernel On Fri, Apr 13, 2018 at 5:13 AM, Jean Delvare <jdelvare@suse.de> wrote: > Hi Wolfram, Sam, > > On Fri, 13 Apr 2018 00:24:57 +0200, Wolfram Sang wrote: >> On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: >> > Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* >> > helper routines as static inlined functions provided by linux/i2c-dev.h. Work >> > has been done to refactor the linux/i2c-dev.h file in the i2c-tools project >> > out into its own library. As a result, these docs have become stale. >> >> Thanks for fixing this! >> >> > This patch corrects the discrepancy and directs the reader to the i2c-tools >> > project for more information. Additionally, some trailing-whitespace cleanups >> > were made. >> >> Minor nit: Having the whitespace changes in a seperate patch is a tad >> easier to review. >> >> > - /* Using I2C Write, equivalent of >> > + /* Using I2C Write, equivalent of >> > i2c_smbus_write_word_data(file, reg, 0x6543) */ >> >> Maybe change to Kernel coding style comments while here? >> >> > - Not meant to be called directly; instead, use the access functions >> > - below. >> > + If possible, use the provided i2c_smbus_* methods described below in favor >> > + of issuing direct ioctls. >> >> Why this change? > > I'm also not sure if "in favor of" is right. "instead of" would sound > better to me, but I'm no native English speaker, I could be wrong. Sounds good, I'll adopt "instead of". Regarding Wolfram's earlier comment, as an engineer, requiring an out-of-tree library to build drivers felt a little off. I can revert this section if you want, just let me know. > >> > -The above functions are all inline functions, that resolve to calls to >> > -the i2c_smbus_access function, that on its turn calls a specific ioctl >> > -with the data in a specific format. Read the source code if you >> > -want to know what happens behind the screens. >> > +The above functions are made available by linking against the libi2c library, >> > +which is provided by the i2c-tools project. See: >> > +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. >> >> This is fine with me. Maybe Jean has a comment on this? > > Fixing the documentation is always welcome, thanks Sam for stepping in. > However we really want separate patches for whitespace fixes and actual > contents change, as Wolfram already mentioned above. Will do! I'll send a v2 patch set, thanks. > > -- > Jean Delvare > SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 29+ messages in thread
* [PATCH v2 1/3] Documentation/i2c: whitespace cleanup 2018-04-13 16:02 ` Sam Hansen (?) @ 2018-04-13 16:44 ` Sam Hansen -1 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c, hansens, wsa, corbet, linux-doc, linux-kernel Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel This strips trailing whitespace in Documentation/i2c/dev-interface. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index d04e6e4964ee..c8737d502791 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -9,8 +9,8 @@ i2c adapters present on your system at a given time. i2cdetect is part of the i2c-tools package. I2C device files are character device files with major device number 89 -and a minor device number corresponding to the number assigned as -explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., +and a minor device number corresponding to the number assigned as +explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., i2c-10, ...). All 256 minor device numbers are reserved for i2c. @@ -38,7 +38,7 @@ Next thing, open the device file, as follows: int file; int adapter_nr = 2; /* probably dynamically determined */ char filename[20]; - + snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { @@ -72,7 +72,7 @@ the device supports them. Both are illustrated below. /* res contains the read word */ } - /* Using I2C Write, equivalent of + /* Using I2C Write, equivalent of i2c_smbus_write_word_data(file, reg, 0x6543) */ buf[0] = reg; buf[1] = 0x43; @@ -147,7 +147,7 @@ You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through ioctl I2C_SLAVE before you try to access the device. -You can do SMBus level transactions (see documentation file smbus-protocol +You can do SMBus level transactions (see documentation file smbus-protocol for details) through the following functions: __s32 i2c_smbus_write_quick(int file, __u8 value); __s32 i2c_smbus_read_byte(int file); @@ -158,7 +158,7 @@ for details) through the following functions: __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value); __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value); __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values); - __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, + __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, __u8 *values); All these transactions return -1 on failure; you can read errno to see what happened. The 'write' transactions return 0 on success; the -- 2.17.0.484.g0c8726318c-goog ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v2 1/3] Documentation/i2c: whitespace cleanup @ 2018-04-13 16:44 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c, hansens, wsa, corbet, linux-doc, linux-kernel Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel This strips trailing whitespace in Documentation/i2c/dev-interface. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index d04e6e4964ee..c8737d502791 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -9,8 +9,8 @@ i2c adapters present on your system at a given time. i2cdetect is part of the i2c-tools package. I2C device files are character device files with major device number 89 -and a minor device number corresponding to the number assigned as -explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., +and a minor device number corresponding to the number assigned as +explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., i2c-10, ...). All 256 minor device numbers are reserved for i2c. @@ -38,7 +38,7 @@ Next thing, open the device file, as follows: int file; int adapter_nr = 2; /* probably dynamically determined */ char filename[20]; - + snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { @@ -72,7 +72,7 @@ the device supports them. Both are illustrated below. /* res contains the read word */ } - /* Using I2C Write, equivalent of + /* Using I2C Write, equivalent of i2c_smbus_write_word_data(file, reg, 0x6543) */ buf[0] = reg; buf[1] = 0x43; @@ -147,7 +147,7 @@ You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through ioctl I2C_SLAVE before you try to access the device. -You can do SMBus level transactions (see documentation file smbus-protocol +You can do SMBus level transactions (see documentation file smbus-protocol for details) through the following functions: __s32 i2c_smbus_write_quick(int file, __u8 value); __s32 i2c_smbus_read_byte(int file); @@ -158,7 +158,7 @@ for details) through the following functions: __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value); __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value); __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values); - __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, + __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, __u8 *values); All these transactions return -1 on failure; you can read errno to see what happened. The 'write' transactions return 0 on success; the -- 2.17.0.484.g0c8726318c-goog -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v2 1/3] Documentation/i2c: whitespace cleanup @ 2018-04-13 16:44 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c; +Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel This strips trailing whitespace in Documentation/i2c/dev-interface. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index d04e6e4964ee..c8737d502791 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -9,8 +9,8 @@ i2c adapters present on your system at a given time. i2cdetect is part of the i2c-tools package. I2C device files are character device files with major device number 89 -and a minor device number corresponding to the number assigned as -explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., +and a minor device number corresponding to the number assigned as +explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ..., i2c-10, ...). All 256 minor device numbers are reserved for i2c. @@ -38,7 +38,7 @@ Next thing, open the device file, as follows: int file; int adapter_nr = 2; /* probably dynamically determined */ char filename[20]; - + snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { @@ -72,7 +72,7 @@ the device supports them. Both are illustrated below. /* res contains the read word */ } - /* Using I2C Write, equivalent of + /* Using I2C Write, equivalent of i2c_smbus_write_word_data(file, reg, 0x6543) */ buf[0] = reg; buf[1] = 0x43; @@ -147,7 +147,7 @@ You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through ioctl I2C_SLAVE before you try to access the device. -You can do SMBus level transactions (see documentation file smbus-protocol +You can do SMBus level transactions (see documentation file smbus-protocol for details) through the following functions: __s32 i2c_smbus_write_quick(int file, __u8 value); __s32 i2c_smbus_read_byte(int file); @@ -158,7 +158,7 @@ for details) through the following functions: __s32 i2c_smbus_write_word_data(int file, __u8 command, __u16 value); __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value); __s32 i2c_smbus_read_block_data(int file, __u8 command, __u8 *values); - __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, + __s32 i2c_smbus_write_block_data(int file, __u8 command, __u8 length, __u8 *values); All these transactions return -1 on failure; you can read errno to see what happened. The 'write' transactions return 0 on success; the -- 2.17.0.484.g0c8726318c-goog ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v2 2/3] Documentation/i2c: sync docs with current state of i2c-tools 2018-04-13 16:44 ` Sam Hansen (?) @ 2018-04-13 16:44 ` Sam Hansen -1 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c, hansens, wsa, corbet, linux-doc, linux-kernel Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* helper routines as static inlined functions provided by linux/i2c-dev.h. Work has been done to refactor the linux/i2c-dev.h file in the i2c-tools project out into its own library. As a result, these docs have become stale. This patch corrects the discrepancy and directs the reader to the i2c-tools project for more information. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index c8737d502791..f92ee1f59914 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -23,11 +23,6 @@ First, you need to include these two headers: #include <linux/i2c-dev.h> #include <i2c/smbus.h> -(Please note that there are two files named "i2c-dev.h" out there. One is -distributed with the Linux kernel and the other one is included in the -source tree of i2c-tools. They used to be different in content but since 2012 -they're identical. You should use "linux/i2c-dev.h"). - Now, you have to decide which adapter you want to access. You should inspect /sys/class/i2c-dev/ or run "i2cdetect -l" to decide this. Adapter numbers are assigned somewhat dynamically, so you can not @@ -140,8 +135,8 @@ ioctl(file, I2C_RDWR, struct i2c_rdwr_ioctl_data *msgset) set in each message, overriding the values set with the above ioctl's. ioctl(file, I2C_SMBUS, struct i2c_smbus_ioctl_data *args) - Not meant to be called directly; instead, use the access functions - below. + If possible, use the provided i2c_smbus_* methods described below instead + of issuing direct ioctls. You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through @@ -166,10 +161,9 @@ what happened. The 'write' transactions return 0 on success; the returns the number of values read. The block buffers need not be longer than 32 bytes. -The above functions are all inline functions, that resolve to calls to -the i2c_smbus_access function, that on its turn calls a specific ioctl -with the data in a specific format. Read the source code if you -want to know what happens behind the screens. +The above functions are made available by linking against the libi2c library, +which is provided by the i2c-tools project. See: +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. Implementation details -- 2.17.0.484.g0c8726318c-goog ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v2 2/3] Documentation/i2c: sync docs with current state of i2c-tools @ 2018-04-13 16:44 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c, hansens, wsa, corbet, linux-doc, linux-kernel Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* helper routines as static inlined functions provided by linux/i2c-dev.h. Work has been done to refactor the linux/i2c-dev.h file in the i2c-tools project out into its own library. As a result, these docs have become stale. This patch corrects the discrepancy and directs the reader to the i2c-tools project for more information. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index c8737d502791..f92ee1f59914 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -23,11 +23,6 @@ First, you need to include these two headers: #include <linux/i2c-dev.h> #include <i2c/smbus.h> -(Please note that there are two files named "i2c-dev.h" out there. One is -distributed with the Linux kernel and the other one is included in the -source tree of i2c-tools. They used to be different in content but since 2012 -they're identical. You should use "linux/i2c-dev.h"). - Now, you have to decide which adapter you want to access. You should inspect /sys/class/i2c-dev/ or run "i2cdetect -l" to decide this. Adapter numbers are assigned somewhat dynamically, so you can not @@ -140,8 +135,8 @@ ioctl(file, I2C_RDWR, struct i2c_rdwr_ioctl_data *msgset) set in each message, overriding the values set with the above ioctl's. ioctl(file, I2C_SMBUS, struct i2c_smbus_ioctl_data *args) - Not meant to be called directly; instead, use the access functions - below. + If possible, use the provided i2c_smbus_* methods described below instead + of issuing direct ioctls. You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through @@ -166,10 +161,9 @@ what happened. The 'write' transactions return 0 on success; the returns the number of values read. The block buffers need not be longer than 32 bytes. -The above functions are all inline functions, that resolve to calls to -the i2c_smbus_access function, that on its turn calls a specific ioctl -with the data in a specific format. Read the source code if you -want to know what happens behind the screens. +The above functions are made available by linking against the libi2c library, +which is provided by the i2c-tools project. See: +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. Implementation details -- 2.17.0.484.g0c8726318c-goog -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v2 2/3] Documentation/i2c: sync docs with current state of i2c-tools @ 2018-04-13 16:44 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c; +Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel Currently, Documentation/i2c/dev-interface describes the use of i2c_smbus_* helper routines as static inlined functions provided by linux/i2c-dev.h. Work has been done to refactor the linux/i2c-dev.h file in the i2c-tools project out into its own library. As a result, these docs have become stale. This patch corrects the discrepancy and directs the reader to the i2c-tools project for more information. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index c8737d502791..f92ee1f59914 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -23,11 +23,6 @@ First, you need to include these two headers: #include <linux/i2c-dev.h> #include <i2c/smbus.h> -(Please note that there are two files named "i2c-dev.h" out there. One is -distributed with the Linux kernel and the other one is included in the -source tree of i2c-tools. They used to be different in content but since 2012 -they're identical. You should use "linux/i2c-dev.h"). - Now, you have to decide which adapter you want to access. You should inspect /sys/class/i2c-dev/ or run "i2cdetect -l" to decide this. Adapter numbers are assigned somewhat dynamically, so you can not @@ -140,8 +135,8 @@ ioctl(file, I2C_RDWR, struct i2c_rdwr_ioctl_data *msgset) set in each message, overriding the values set with the above ioctl's. ioctl(file, I2C_SMBUS, struct i2c_smbus_ioctl_data *args) - Not meant to be called directly; instead, use the access functions - below. + If possible, use the provided i2c_smbus_* methods described below instead + of issuing direct ioctls. You can do plain i2c transactions by using read(2) and write(2) calls. You do not need to pass the address byte; instead, set it through @@ -166,10 +161,9 @@ what happened. The 'write' transactions return 0 on success; the returns the number of values read. The block buffers need not be longer than 32 bytes. -The above functions are all inline functions, that resolve to calls to -the i2c_smbus_access function, that on its turn calls a specific ioctl -with the data in a specific format. Read the source code if you -want to know what happens behind the screens. +The above functions are made available by linking against the libi2c library, +which is provided by the i2c-tools project. See: +https://git.kernel.org/pub/scm/utils/i2c-tools/i2c-tools.git/. Implementation details -- 2.17.0.484.g0c8726318c-goog ^ permalink raw reply related [flat|nested] 29+ messages in thread
* Re: [PATCH v2 2/3] Documentation/i2c: sync docs with current state of i2c-tools 2018-04-13 16:44 ` Sam Hansen (?) (?) @ 2018-04-13 16:50 ` Wolfram Sang -1 siblings, 0 replies; 29+ messages in thread From: Wolfram Sang @ 2018-04-13 16:50 UTC (permalink / raw) To: Sam Hansen; +Cc: linux-i2c, corbet, linux-doc, linux-kernel [-- Attachment #1: Type: text/plain, Size: 578 bytes --] On Fri, Apr 13, 2018 at 09:44:04AM -0700, Sam Hansen wrote: > Currently, Documentation/i2c/dev-interface describes the use of > i2c_smbus_* helper routines as static inlined functions provided by > linux/i2c-dev.h. Work has been done to refactor the linux/i2c-dev.h file > in the i2c-tools project out into its own library. As a result, these > docs have become stale. > > This patch corrects the discrepancy and directs the reader to the > i2c-tools project for more information. > > Signed-off-by: Sam Hansen <hansens@google.com> Looks good to me as well. [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 833 bytes --] ^ permalink raw reply [flat|nested] 29+ messages in thread
* [PATCH v2 3/3] Documentation/i2c: adopt kernel commenting style in examples 2018-04-13 16:44 ` Sam Hansen (?) @ 2018-04-13 16:44 ` Sam Hansen -1 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c, hansens, wsa, corbet, linux-doc, linux-kernel Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel The example I2C code is rewritten to adopt the preferred kernel block commenting style. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 57 +++++++++++++++++++++++++-------- 1 file changed, 43 insertions(+), 14 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index f92ee1f59914..e17f5814c199 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -30,24 +30,34 @@ assume much about them. They can even change from one boot to the next. Next thing, open the device file, as follows: + /* + * The adapter is probably dynamically determined. + */ int file; - int adapter_nr = 2; /* probably dynamically determined */ + int adapter_nr = 2; char filename[20]; snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { - /* ERROR HANDLING; you can check errno to see what went wrong */ + /* + * ERROR HANDLING; you can check errno to see what went wrong. + */ exit(1); } When you have opened the device, you must specify with what device address you want to communicate: - int addr = 0x40; /* The I2C address */ + /* + * The I2C address. + */ + int addr = 0x40; if (ioctl(file, I2C_SLAVE, addr) < 0) { - /* ERROR HANDLING; you can check errno to see what went wrong */ + /* + * ERROR HANDLING; you can check errno to see what went wrong. + */ exit(1); } @@ -55,32 +65,51 @@ Well, you are all set up now. You can now use SMBus commands or plain I2C to communicate with your device. SMBus commands are preferred if the device supports them. Both are illustrated below. - __u8 reg = 0x10; /* Device register to access */ + /* + * The device register to access. + */ + __u8 reg = 0x10; __s32 res; char buf[10]; - /* Using SMBus commands */ + /* + * Using SMBus commands. + */ res = i2c_smbus_read_word_data(file, reg); if (res < 0) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } else { - /* res contains the read word */ + /* + * res contains the read word. + */ } - /* Using I2C Write, equivalent of - i2c_smbus_write_word_data(file, reg, 0x6543) */ + /* + * Using I2C Write, equivalent of + * i2c_smbus_write_word_data(file, reg, 0x6543). + */ buf[0] = reg; buf[1] = 0x43; buf[2] = 0x65; if (write(file, buf, 3) != 3) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } - /* Using I2C Read, equivalent of i2c_smbus_read_byte(file) */ + /* + * Using I2C Read, equivalent of i2c_smbus_read_byte(file). + */ if (read(file, buf, 1) != 1) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } else { - /* buf[0] contains the read byte */ + /* + * buf[0] contains the read byte. + */ } Note that only a subset of the I2C and SMBus protocols can be achieved by -- 2.17.0.484.g0c8726318c-goog ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v2 3/3] Documentation/i2c: adopt kernel commenting style in examples @ 2018-04-13 16:44 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c, hansens, wsa, corbet, linux-doc, linux-kernel Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel The example I2C code is rewritten to adopt the preferred kernel block commenting style. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 57 +++++++++++++++++++++++++-------- 1 file changed, 43 insertions(+), 14 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index f92ee1f59914..e17f5814c199 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -30,24 +30,34 @@ assume much about them. They can even change from one boot to the next. Next thing, open the device file, as follows: + /* + * The adapter is probably dynamically determined. + */ int file; - int adapter_nr = 2; /* probably dynamically determined */ + int adapter_nr = 2; char filename[20]; snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { - /* ERROR HANDLING; you can check errno to see what went wrong */ + /* + * ERROR HANDLING; you can check errno to see what went wrong. + */ exit(1); } When you have opened the device, you must specify with what device address you want to communicate: - int addr = 0x40; /* The I2C address */ + /* + * The I2C address. + */ + int addr = 0x40; if (ioctl(file, I2C_SLAVE, addr) < 0) { - /* ERROR HANDLING; you can check errno to see what went wrong */ + /* + * ERROR HANDLING; you can check errno to see what went wrong. + */ exit(1); } @@ -55,32 +65,51 @@ Well, you are all set up now. You can now use SMBus commands or plain I2C to communicate with your device. SMBus commands are preferred if the device supports them. Both are illustrated below. - __u8 reg = 0x10; /* Device register to access */ + /* + * The device register to access. + */ + __u8 reg = 0x10; __s32 res; char buf[10]; - /* Using SMBus commands */ + /* + * Using SMBus commands. + */ res = i2c_smbus_read_word_data(file, reg); if (res < 0) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } else { - /* res contains the read word */ + /* + * res contains the read word. + */ } - /* Using I2C Write, equivalent of - i2c_smbus_write_word_data(file, reg, 0x6543) */ + /* + * Using I2C Write, equivalent of + * i2c_smbus_write_word_data(file, reg, 0x6543). + */ buf[0] = reg; buf[1] = 0x43; buf[2] = 0x65; if (write(file, buf, 3) != 3) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } - /* Using I2C Read, equivalent of i2c_smbus_read_byte(file) */ + /* + * Using I2C Read, equivalent of i2c_smbus_read_byte(file). + */ if (read(file, buf, 1) != 1) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } else { - /* buf[0] contains the read byte */ + /* + * buf[0] contains the read byte. + */ } Note that only a subset of the I2C and SMBus protocols can be achieved by -- 2.17.0.484.g0c8726318c-goog -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply related [flat|nested] 29+ messages in thread
* [PATCH v2 3/3] Documentation/i2c: adopt kernel commenting style in examples @ 2018-04-13 16:44 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 16:44 UTC (permalink / raw) To: linux-i2c; +Cc: Sam Hansen, wsa, corbet, linux-doc, linux-kernel The example I2C code is rewritten to adopt the preferred kernel block commenting style. Signed-off-by: Sam Hansen <hansens@google.com> --- Documentation/i2c/dev-interface | 57 +++++++++++++++++++++++++-------- 1 file changed, 43 insertions(+), 14 deletions(-) diff --git a/Documentation/i2c/dev-interface b/Documentation/i2c/dev-interface index f92ee1f59914..e17f5814c199 100644 --- a/Documentation/i2c/dev-interface +++ b/Documentation/i2c/dev-interface @@ -30,24 +30,34 @@ assume much about them. They can even change from one boot to the next. Next thing, open the device file, as follows: + /* + * The adapter is probably dynamically determined. + */ int file; - int adapter_nr = 2; /* probably dynamically determined */ + int adapter_nr = 2; char filename[20]; snprintf(filename, 19, "/dev/i2c-%d", adapter_nr); file = open(filename, O_RDWR); if (file < 0) { - /* ERROR HANDLING; you can check errno to see what went wrong */ + /* + * ERROR HANDLING; you can check errno to see what went wrong. + */ exit(1); } When you have opened the device, you must specify with what device address you want to communicate: - int addr = 0x40; /* The I2C address */ + /* + * The I2C address. + */ + int addr = 0x40; if (ioctl(file, I2C_SLAVE, addr) < 0) { - /* ERROR HANDLING; you can check errno to see what went wrong */ + /* + * ERROR HANDLING; you can check errno to see what went wrong. + */ exit(1); } @@ -55,32 +65,51 @@ Well, you are all set up now. You can now use SMBus commands or plain I2C to communicate with your device. SMBus commands are preferred if the device supports them. Both are illustrated below. - __u8 reg = 0x10; /* Device register to access */ + /* + * The device register to access. + */ + __u8 reg = 0x10; __s32 res; char buf[10]; - /* Using SMBus commands */ + /* + * Using SMBus commands. + */ res = i2c_smbus_read_word_data(file, reg); if (res < 0) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } else { - /* res contains the read word */ + /* + * res contains the read word. + */ } - /* Using I2C Write, equivalent of - i2c_smbus_write_word_data(file, reg, 0x6543) */ + /* + * Using I2C Write, equivalent of + * i2c_smbus_write_word_data(file, reg, 0x6543). + */ buf[0] = reg; buf[1] = 0x43; buf[2] = 0x65; if (write(file, buf, 3) != 3) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } - /* Using I2C Read, equivalent of i2c_smbus_read_byte(file) */ + /* + * Using I2C Read, equivalent of i2c_smbus_read_byte(file). + */ if (read(file, buf, 1) != 1) { - /* ERROR HANDLING: i2c transaction failed */ + /* + * ERROR HANDLING: i2c transaction failed. + */ } else { - /* buf[0] contains the read byte */ + /* + * buf[0] contains the read byte. + */ } Note that only a subset of the I2C and SMBus protocols can be achieved by -- 2.17.0.484.g0c8726318c-goog ^ permalink raw reply related [flat|nested] 29+ messages in thread
* Re: [PATCH v2 3/3] Documentation/i2c: adopt kernel commenting style in examples 2018-04-13 16:44 ` Sam Hansen (?) (?) @ 2018-04-13 16:50 ` Wolfram Sang 2018-04-13 17:39 ` Sam Hansen -1 siblings, 1 reply; 29+ messages in thread From: Wolfram Sang @ 2018-04-13 16:50 UTC (permalink / raw) To: Sam Hansen; +Cc: linux-i2c, corbet, linux-doc, linux-kernel [-- Attachment #1: Type: text/plain, Size: 428 bytes --] > - int adapter_nr = 2; /* probably dynamically determined */ Such comments are actually OK. > - /* ERROR HANDLING; you can check errno to see what went wrong */ Such as well. > - /* Using I2C Write, equivalent of > - i2c_smbus_write_word_data(file, reg, 0x6543) */ > + /* > + * Using I2C Write, equivalent of > + * i2c_smbus_write_word_data(file, reg, 0x6543). > + */ This is the only broken one AFAICT. [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 833 bytes --] ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH v2 3/3] Documentation/i2c: adopt kernel commenting style in examples 2018-04-13 16:50 ` Wolfram Sang @ 2018-04-13 17:39 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 17:39 UTC (permalink / raw) To: Wolfram Sang; +Cc: linux-i2c, corbet, linux-doc, linux-kernel On Fri, Apr 13, 2018 at 9:50 AM, Wolfram Sang <wsa@the-dreams.de> wrote: > >> - int adapter_nr = 2; /* probably dynamically determined */ > > Such comments are actually OK. Ah, gotcha. Thanks for the correction. Standby for revised patch set. > >> - /* ERROR HANDLING; you can check errno to see what went wrong */ > > Such as well. > >> - /* Using I2C Write, equivalent of >> - i2c_smbus_write_word_data(file, reg, 0x6543) */ >> + /* >> + * Using I2C Write, equivalent of >> + * i2c_smbus_write_word_data(file, reg, 0x6543). >> + */ > > This is the only broken one AFAICT. > ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH v2 3/3] Documentation/i2c: adopt kernel commenting style in examples @ 2018-04-13 17:39 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 17:39 UTC (permalink / raw) To: Wolfram Sang; +Cc: linux-i2c, corbet, linux-doc, linux-kernel On Fri, Apr 13, 2018 at 9:50 AM, Wolfram Sang <wsa@the-dreams.de> wrote: > >> - int adapter_nr = 2; /* probably dynamically determined */ > > Such comments are actually OK. Ah, gotcha. Thanks for the correction. Standby for revised patch set. > >> - /* ERROR HANDLING; you can check errno to see what went wrong */ > > Such as well. > >> - /* Using I2C Write, equivalent of >> - i2c_smbus_write_word_data(file, reg, 0x6543) */ >> + /* >> + * Using I2C Write, equivalent of >> + * i2c_smbus_write_word_data(file, reg, 0x6543). >> + */ > > This is the only broken one AFAICT. > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH v2 1/3] Documentation/i2c: whitespace cleanup 2018-04-13 16:44 ` Sam Hansen ` (3 preceding siblings ...) (?) @ 2018-04-13 16:50 ` Wolfram Sang -1 siblings, 0 replies; 29+ messages in thread From: Wolfram Sang @ 2018-04-13 16:50 UTC (permalink / raw) To: Sam Hansen; +Cc: linux-i2c, corbet, linux-doc, linux-kernel [-- Attachment #1: Type: text/plain, Size: 257 bytes --] On Fri, Apr 13, 2018 at 09:44:03AM -0700, Sam Hansen wrote: > This strips trailing whitespace in Documentation/i2c/dev-interface. > > Signed-off-by: Sam Hansen <hansens@google.com> Looks good to me. But please send new series as seperate threads. [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 833 bytes --] ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. 2018-04-13 16:02 ` Sam Hansen @ 2018-04-13 18:49 ` Jean Delvare -1 siblings, 0 replies; 29+ messages in thread From: Jean Delvare @ 2018-04-13 18:49 UTC (permalink / raw) To: Sam Hansen; +Cc: Wolfram Sang, linux-i2c, corbet, linux-doc, linux-kernel On Fri, 13 Apr 2018 09:02:03 -0700, Sam Hansen wrote: > On Fri, Apr 13, 2018 at 5:13 AM, Jean Delvare <jdelvare@suse.de> wrote: > > On Fri, 13 Apr 2018 00:24:57 +0200, Wolfram Sang wrote: > >> On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: > >> > - Not meant to be called directly; instead, use the access functions > >> > - below. > >> > + If possible, use the provided i2c_smbus_* methods described below in favor > >> > + of issuing direct ioctls. > >> > >> Why this change? > > > > I'm also not sure if "in favor of" is right. "instead of" would sound > > better to me, but I'm no native English speaker, I could be wrong. > > Sounds good, I'll adopt "instead of". Regarding Wolfram's earlier > comment, as an engineer, requiring an out-of-tree library to build > drivers felt a little off. I can revert this section if you want, > just let me know. The i2c dev interface, and the overlaying library, are used by user-space applications. This has nothing to do with "building drivers", and makes your "out-of-tree" objection irrelevant. I doubt libi2c is the only user-space library building on top of a kernel interface. -- Jean Delvare SUSE L3 Support ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. @ 2018-04-13 18:49 ` Jean Delvare 0 siblings, 0 replies; 29+ messages in thread From: Jean Delvare @ 2018-04-13 18:49 UTC (permalink / raw) To: Sam Hansen; +Cc: Wolfram Sang, linux-i2c, corbet, linux-doc, linux-kernel On Fri, 13 Apr 2018 09:02:03 -0700, Sam Hansen wrote: > On Fri, Apr 13, 2018 at 5:13 AM, Jean Delvare <jdelvare@suse.de> wrote: > > On Fri, 13 Apr 2018 00:24:57 +0200, Wolfram Sang wrote: > >> On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: > >> > - Not meant to be called directly; instead, use the access functions > >> > - below. > >> > + If possible, use the provided i2c_smbus_* methods described below in favor > >> > + of issuing direct ioctls. > >> > >> Why this change? > > > > I'm also not sure if "in favor of" is right. "instead of" would sound > > better to me, but I'm no native English speaker, I could be wrong. > > Sounds good, I'll adopt "instead of". Regarding Wolfram's earlier > comment, as an engineer, requiring an out-of-tree library to build > drivers felt a little off. I can revert this section if you want, > just let me know. The i2c dev interface, and the overlaying library, are used by user-space applications. This has nothing to do with "building drivers", and makes your "out-of-tree" objection irrelevant. I doubt libi2c is the only user-space library building on top of a kernel interface. -- Jean Delvare SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. 2018-04-13 18:49 ` Jean Delvare @ 2018-04-13 23:32 ` Sam Hansen -1 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 23:32 UTC (permalink / raw) To: Jean Delvare Cc: Wolfram Sang, linux-i2c, Jonathan Corbet, linux-doc, linux-kernel On Fri, Apr 13, 2018 at 11:49 AM, Jean Delvare <jdelvare@suse.de> wrote: > On Fri, 13 Apr 2018 09:02:03 -0700, Sam Hansen wrote: >> On Fri, Apr 13, 2018 at 5:13 AM, Jean Delvare <jdelvare@suse.de> wrote: >> > On Fri, 13 Apr 2018 00:24:57 +0200, Wolfram Sang wrote: >> >> On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: >> >> > - Not meant to be called directly; instead, use the access functions >> >> > - below. >> >> > + If possible, use the provided i2c_smbus_* methods described below in favor >> >> > + of issuing direct ioctls. >> >> >> >> Why this change? >> > >> > I'm also not sure if "in favor of" is right. "instead of" would sound >> > better to me, but I'm no native English speaker, I could be wrong. >> >> Sounds good, I'll adopt "instead of". Regarding Wolfram's earlier >> comment, as an engineer, requiring an out-of-tree library to build >> drivers felt a little off. I can revert this section if you want, >> just let me know. > > The i2c dev interface, and the overlaying library, are used by > user-space applications. This has nothing to do with "building > drivers", and makes your "out-of-tree" objection irrelevant. I doubt > libi2c is the only user-space library building on top of a kernel > interface. Ok, sounds good. I'll send a revised patch set reverting this block. (also, did I send the v3 patch series threaded correctly?) > > -- > Jean Delvare > SUSE L3 Support ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. @ 2018-04-13 23:32 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-13 23:32 UTC (permalink / raw) To: Jean Delvare Cc: Wolfram Sang, linux-i2c, Jonathan Corbet, linux-doc, linux-kernel On Fri, Apr 13, 2018 at 11:49 AM, Jean Delvare <jdelvare@suse.de> wrote: > On Fri, 13 Apr 2018 09:02:03 -0700, Sam Hansen wrote: >> On Fri, Apr 13, 2018 at 5:13 AM, Jean Delvare <jdelvare@suse.de> wrote: >> > On Fri, 13 Apr 2018 00:24:57 +0200, Wolfram Sang wrote: >> >> On Thu, Apr 12, 2018 at 02:33:42PM -0700, Sam Hansen wrote: >> >> > - Not meant to be called directly; instead, use the access functions >> >> > - below. >> >> > + If possible, use the provided i2c_smbus_* methods described below in favor >> >> > + of issuing direct ioctls. >> >> >> >> Why this change? >> > >> > I'm also not sure if "in favor of" is right. "instead of" would sound >> > better to me, but I'm no native English speaker, I could be wrong. >> >> Sounds good, I'll adopt "instead of". Regarding Wolfram's earlier >> comment, as an engineer, requiring an out-of-tree library to build >> drivers felt a little off. I can revert this section if you want, >> just let me know. > > The i2c dev interface, and the overlaying library, are used by > user-space applications. This has nothing to do with "building > drivers", and makes your "out-of-tree" objection irrelevant. I doubt > libi2c is the only user-space library building on top of a kernel > interface. Ok, sounds good. I'll send a revised patch set reverting this block. (also, did I send the v3 patch series threaded correctly?) > > -- > Jean Delvare > SUSE L3 Support -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. 2018-04-13 23:32 ` Sam Hansen (?) @ 2018-04-14 6:27 ` Wolfram Sang 2018-04-17 19:17 ` Sam Hansen -1 siblings, 1 reply; 29+ messages in thread From: Wolfram Sang @ 2018-04-14 6:27 UTC (permalink / raw) To: Sam Hansen Cc: Jean Delvare, linux-i2c, Jonathan Corbet, linux-doc, linux-kernel [-- Attachment #1: Type: text/plain, Size: 200 bytes --] > (also, did I send the v3 patch series threaded correctly?) Yes, that worked. Thanks! Things to improve there: I was both in To: and CC: field, so I got mails twice. Jean was missing completely. [-- Attachment #2: signature.asc --] [-- Type: application/pgp-signature, Size: 833 bytes --] ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. 2018-04-14 6:27 ` Wolfram Sang @ 2018-04-17 19:17 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-17 19:17 UTC (permalink / raw) To: Wolfram Sang Cc: Jean Delvare, linux-i2c, Jonathan Corbet, linux-doc, linux-kernel On Fri, Apr 13, 2018 at 11:27 PM, Wolfram Sang <wsa@the-dreams.de> wrote: > >> (also, did I send the v3 patch series threaded correctly?) > > Yes, that worked. Thanks! > > Things to improve there: I was both in To: and CC: field, so I got mails > twice. Jean was missing completely. Ah, thanks. I had been using scripts/get_maintainer.pl to determine the CC list, I'll make sure the right people are on the cc line in the future. > ^ permalink raw reply [flat|nested] 29+ messages in thread
* Re: [PATCH] Documentation/i2c: sync docs with current state of i2c-tools. @ 2018-04-17 19:17 ` Sam Hansen 0 siblings, 0 replies; 29+ messages in thread From: Sam Hansen @ 2018-04-17 19:17 UTC (permalink / raw) To: Wolfram Sang Cc: Jean Delvare, linux-i2c, Jonathan Corbet, linux-doc, linux-kernel On Fri, Apr 13, 2018 at 11:27 PM, Wolfram Sang <wsa@the-dreams.de> wrote: > >> (also, did I send the v3 patch series threaded correctly?) > > Yes, that worked. Thanks! > > Things to improve there: I was both in To: and CC: field, so I got mails > twice. Jean was missing completely. Ah, thanks. I had been using scripts/get_maintainer.pl to determine the CC list, I'll make sure the right people are on the cc line in the future. > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ^ permalink raw reply [flat|nested] 29+ messages in thread
end of thread, other threads:[~2018-04-17 19:18 UTC | newest] Thread overview: 29+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2018-04-12 21:33 [PATCH] Documentation/i2c: sync docs with current state of i2c-tools Sam Hansen 2018-04-12 21:33 ` Sam Hansen 2018-04-12 21:33 ` Sam Hansen 2018-04-12 22:24 ` Wolfram Sang 2018-04-13 12:13 ` Jean Delvare 2018-04-13 12:13 ` Jean Delvare 2018-04-13 16:02 ` Sam Hansen 2018-04-13 16:02 ` Sam Hansen 2018-04-13 16:44 ` [PATCH v2 1/3] Documentation/i2c: whitespace cleanup Sam Hansen 2018-04-13 16:44 ` Sam Hansen 2018-04-13 16:44 ` Sam Hansen 2018-04-13 16:44 ` [PATCH v2 2/3] Documentation/i2c: sync docs with current state of i2c-tools Sam Hansen 2018-04-13 16:44 ` Sam Hansen 2018-04-13 16:44 ` Sam Hansen 2018-04-13 16:50 ` Wolfram Sang 2018-04-13 16:44 ` [PATCH v2 3/3] Documentation/i2c: adopt kernel commenting style in examples Sam Hansen 2018-04-13 16:44 ` Sam Hansen 2018-04-13 16:44 ` Sam Hansen 2018-04-13 16:50 ` Wolfram Sang 2018-04-13 17:39 ` Sam Hansen 2018-04-13 17:39 ` Sam Hansen 2018-04-13 16:50 ` [PATCH v2 1/3] Documentation/i2c: whitespace cleanup Wolfram Sang 2018-04-13 18:49 ` [PATCH] Documentation/i2c: sync docs with current state of i2c-tools Jean Delvare 2018-04-13 18:49 ` Jean Delvare 2018-04-13 23:32 ` Sam Hansen 2018-04-13 23:32 ` Sam Hansen 2018-04-14 6:27 ` Wolfram Sang 2018-04-17 19:17 ` Sam Hansen 2018-04-17 19:17 ` Sam Hansen
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