From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Glass Date: Thu, 11 May 2017 18:24:01 -0600 Subject: [U-Boot] [PATCH v2 12/12] Drop use of CONFIG_I2C_SOFT In-Reply-To: <20170512002401.13115-1-sjg@chromium.org> References: <20170512002401.13115-1-sjg@chromium.org> Message-ID: <20170512002401.13115-13-sjg@chromium.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de This option is not used in U-Boot. Drop it. Signed-off-by: Simon Glass --- Changes in v2: - Rebase to master README | 32 +------------------------------- 1 file changed, 1 insertion(+), 31 deletions(-) diff --git a/README b/README index a9b008b85b..3d25eb137b 100644 --- a/README +++ b/README @@ -2204,37 +2204,7 @@ The following options need to be configured: If you do not have i2c muxes on your board, omit this define. -----under removal: - -- Legacy I2C Support: CONFIG_SOFT_I2C - - NOTE: It is intended to move drivers to CONFIG_SYS_I2C which - provides the following compelling advantages: - - - more than one i2c adapter is usable - - approved multibus support - - better i2c mux support - - ** CONFIG_SOFT_I2C is now being removed ** - - With CONFIG_SOFT_I2C you will need to define - CONFIG_SYS_I2C_SPEED to be the frequency (in Hz) at which you - wish your i2c bus to run and CONFIG_SYS_I2C_SLAVE to be the - address of this node (ie the CPU's i2c node address). - - Now, the u-boot i2c code for the mpc8xx - (arch/powerpc/cpu/mpc8xx/i2c.c) sets the CPU up as a master node - and so its address should therefore be cleared to 0 (See, - eg, MPC823e User's Manual p.16-473). So, set - CONFIG_SYS_I2C_SLAVE to 0. - - When a board is reset during an i2c bus transfer - chips might think that the current transfer is still - in progress. Reset the slave devices by sending start - commands until the slave device responds. - - That's all that's required for CONFIG_HARD_I2C. - +- Legacy I2C Support: If you use the software i2c interface (CONFIG_SYS_I2C_SOFT) then the following macros need to be defined (examples are from include/configs/lwmon.h): -- 2.13.0.rc2.291.g57267f2277-goog