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gpio/stm32: Move from the OPEN_DRAIN interface to the DRIVE_STRENGTH interface

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The STM32 GPIO driver extended the generic GPIO driver interace with
the concept of OPEN_DRAIN.  There is previous discussion about
representing such concepts in the GPIO interface in a more general
fashion here:

https://lists.zephyrproject.org/archives/list/devel@lists.zephyrproject.org/thread/6DCFUAKCOOOBHUO3ZK45ES6IQXOEOFWN/

The DRIVE STRENGTH interface supports the concepts of OPEN DRAIN and
other variants supports by other vendors hardware.

Adjust the STM32 GPIO driver to use the DRIVE STRENGTH interface.  A
following patch will address the simplication of gpio.h

Change-Id: I56b0792ec2b21f1adc673dff019288dc8573d005
Signed-off-by: Marcus Shawcroft <marcus.shawcroft@arm.com>
This commit is contained in:
Marcus Shawcroft 2017-01-24 10:56:39 +00:00
commit cf94f6144d
1 changed files with 15 additions and 11 deletions
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26
arch/arm/soc/st_stm32/stm32f3/soc_gpio.c
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@ -58,21 +58,25 @@ int stm32_gpio_flags_to_conf(int flags, int *pincfg)
int pud = flags & GPIO_PUD_MASK;
if (direction == GPIO_DIR_OUT) {
int type = flags & GPIO_PP_OD_MASK;
int type = flags & GPIO_DS_HIGH_MASK;
if (type == GPIO_PUSH_PULL) {
*pincfg = STM32F3X_PIN_CONFIG_DRIVE_PUSH_PULL;
if (pud == GPIO_PUD_PULL_UP) {
*pincfg = STM32F3X_PIN_CONFIG_DRIVE_PUSH_PULL_PU;
} else if (pud == GPIO_PUD_PULL_DOWN) {
*pincfg = STM32F3X_PIN_CONFIG_DRIVE_PUSH_PULL_PD;
}
} else if (type == GPIO_OPEN_DRAIN) {
if (type == GPIO_DS_DISCONNECT_HIGH) {
*pincfg = STM32F3X_PIN_CONFIG_DRIVE_OPEN_DRAIN;
if (pud == GPIO_PUD_PULL_UP) {
*pincfg = STM32F3X_PIN_CONFIG_DRIVE_OPEN_DRAIN_PU;
*pincfg =
STM32F3X_PIN_CONFIG_DRIVE_OPEN_DRAIN_PU;
} else if (pud == GPIO_PUD_PULL_DOWN) {
*pincfg = STM32F3X_PIN_CONFIG_DRIVE_OPEN_DRAIN_PD;
*pincfg =
STM32F3X_PIN_CONFIG_DRIVE_OPEN_DRAIN_PD;
}
} else {
*pincfg = STM32F3X_PIN_CONFIG_DRIVE_PUSH_PULL;
if (pud == GPIO_PUD_PULL_UP) {
*pincfg =
STM32F3X_PIN_CONFIG_DRIVE_PUSH_PULL_PU;
} else if (pud == GPIO_PUD_PULL_DOWN) {
*pincfg =
STM32F3X_PIN_CONFIG_DRIVE_PUSH_PULL_PD;
}
}
} else if (direction == GPIO_DIR_IN) {