summaryrefslogtreecommitdiffstats
path: root/include/dt-bindings
diff options
context:
space:
mode:
authorDavid Wu <david.wu@rock-chips.com>2016-05-11 05:39:28 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-05-11 10:43:21 +0200
commit3ba6767a56127d7b2f8f124129f94c0556c594d0 (patch)
tree03c929665ca5457e731beb3726bffb2df987cade /include/dt-bindings
parentpinctrl: stm32: Implement .pin_config_dbg_show() (diff)
downloadlinux-3ba6767a56127d7b2f8f124129f94c0556c594d0.tar.xz
linux-3ba6767a56127d7b2f8f124129f94c0556c594d0.zip
pinctrl: rockchip: fix pull setting error for rk3399
This patch fixes the pinctrl pull bias setting, since the pull up/down setting is the contrary for gpio0(just the gpio0a and gpio0b) and gpio2(just the gpio2c and gpio2d). From the TRM said, the gpio0a pull polarity setting: gpio0a_p GPIO0A PE/PS programmation section, every GPIO bit corresponding to 2bits[PS:PE] 2'b00: Z(Normal operation); 2'b11: weak 1(pull-up); 2'b01: weak 0(pull-down); 2'b10: Z(Normal operation); Then, the other gpios setting as the following: gpio1a_p (e.g.: gpio1, gpio2a, gpio2b, gpio3...) GPIO1A PU/PD programmation section, every GPIO bit corresponding to 2bits 2'b00: Z(Normal operation); 2'b01: weak 1(pull-up); 2'b10: weak 0(pull-down); 2'b11: Z(Normal operation); For example,(rk3399evb board) sdmmc_cd --->gpio0_a7 localhost / # io -r -4 0xff320040 ff320040: 00004d5f In general,the value should be 0x0000cd5f since the pin has been set in the dts. Signed-off-by: David Wu <david.wu@rock-chips.com> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Cc: linux-gpio@vger.kernel.org Reviewed-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/dt-bindings')
0 files changed, 0 insertions, 0 deletions