Hi Przemyslaw, > Signed-off-by: Przemyslaw Marczak <p.marc...@samsung.com> > Cc: Masahiro Yamada <yamad...@jp.panasonic.com> > Cc: Mike Frysinger <vap...@gentoo.org> > Cc: Simon Glass <s...@chromium.org> > Cc: Heiko Schocher <h...@denx.de> > --- > drivers/i2c/Kconfig | 43 +++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 43 insertions(+) > > diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig > index 0a52ed9..dd7eb3c 100644 > --- a/drivers/i2c/Kconfig > +++ b/drivers/i2c/Kconfig > @@ -13,6 +13,49 @@ config DM_I2C_COMPAT > to convert all code for a board in a single commit. It > should not be enabled for any board in an official release. > > +config DM_I2C_SOFT > + bool "Enable Driver Model for Software I2C Driver" > + depends on DM_I2C > + help > + Enable the i2c bus driver emulation by using GPIO. > + The bus configuration is given by the device-tree, like > below. + > + /* First, define the alias number to have continuous bus > numbering */ > + aliases { > + [...] > + i2c5 = "/i2c@13500000"; > + i2c6 = "/soft-i2c@1"; > + [...] > + } > + > + /* And next define the basic bus attributes */ > + soft-i2c@1 { > + #address-cells = <1>; > + #size-cells = <0>; > + compatible = "soft-i2c"; > + clock-frequency = <50000>; > + /* Define the proper GPIO pins */ > + clock-pin = <&gpa0 0 GPIO_ACTIVE_HIGH>; > + data-pin = <&gpa0 1 GPIO_ACTIVE_HIGH>; > + > + /* Optionally, define some driver node (bus child) */ > + somedev@0x44 { > + compatible = "somedev"; > + reg = <0x44>; > + [...] > + }; > + } > + > + The device can be accessed by the i2c command: > + # i2c dev 8 (bus number set by alias) > + # i2c probe <0x44> (address is optionally) > + # i2c md 0x44 0x0 (dump dev registers at > address 0x0) > + # Valid chip addresses: 0x44 (success!) > + ... > + > + Driving the bus lines is done by dm gpio calls in the > preprocessor > + macros. Each, can be redefined by the user. > + > config SYS_I2C_UNIPHIER > bool "UniPhier I2C driver" > depends on ARCH_UNIPHIER && DM_I2C
Reviewed-by: Lukasz Majewski <l.majew...@samsung.com> -- Best regards, Lukasz Majewski Samsung R&D Institute Poland (SRPOL) | Linux Platform Group _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot