[Libre-soc-bugs] [Bug 746] I2C needs an Open Drain IO Pad

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=746

--- Comment #10 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
as an fyi:

https://github.com/libopencm3/libopencm3/blob/ed2aada3e8c84d085f4f3451a9b9cdf36b893d62/include/libopencm3/stm32/common/gpio_common_f234.h#L192

/* --- GPIOx_OTYPER values ------------------------------------------------- */

/** @defgroup gpio_output_type GPIO Output Pin Driver Type
@ingroup gpio_defines
@{*/
/** Push Pull */
#define GPIO_OTYPE_PP                   0x0
/** Open Drain */
#define GPIO_OTYPE_OD                   0x1

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