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drivers: can: Make zcan_frame const for sending

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For sending the zcan_frame can be const, because its only
copied to the registers.

Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
This commit is contained in:
Alexander Wachter 2019-02-28 10:54:10 +01:00 • committed by Kumar Gala
commit b0826442ee
2 changed files with 7 additions and 6 deletions
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4
drivers/can/stm32_can.c
View file

@ -319,8 +319,8 @@ static int can_stm32_init(struct device *dev)
return 0;
}
int can_stm32_send(struct device *dev, struct zcan_frame *msg, s32_t timeout,
can_tx_callback_t callback)
int can_stm32_send(struct device *dev, const struct zcan_frame *msg,
s32_t timeout, can_tx_callback_t callback)
{
const struct can_stm32_config *cfg = DEV_CFG(dev);
struct can_stm32_data *data = DEV_DATA(dev);

9
include/can.h
View file

@ -245,7 +245,7 @@ typedef int (*can_configure_t)(struct device *dev, enum can_mode mode,
* @retval 0 If successful.
* @retval CAN_TX_* on failure.
*/
typedef int (*can_send_t)(struct device *dev, struct zcan_frame *msg,
typedef int (*can_send_t)(struct device *dev, const struct zcan_frame *msg,
s32_t timeout, can_tx_callback_t callback_isr);
@ -313,10 +313,11 @@ struct can_driver_api {
};
__syscall int can_send(struct device *dev, struct zcan_frame *msg,
__syscall int can_send(struct device *dev, const struct zcan_frame *msg,
s32_t timeout, can_tx_callback_t callback_isr);
static inline int _impl_can_send(struct device *dev, struct zcan_frame *msg,
static inline int _impl_can_send(struct device *dev,
const struct zcan_frame *msg,
s32_t timeout, can_tx_callback_t callback_isr)
{
const struct can_driver_api *api = dev->driver_api;
@ -344,7 +345,7 @@ static inline int _impl_can_send(struct device *dev, struct zcan_frame *msg,
* @retval -EIO General input / output error.
* @retval -EINVAL if length > 8.
*/
static inline int can_write(struct device *dev, u8_t *data, u8_t length,
static inline int can_write(struct device *dev, const u8_t *data, u8_t length,
u32_t id, enum can_rtr rtr, s32_t timeout)
{
struct zcan_frame msg;