Similar to rtc_read(), introduce a helper that allows the caller to write multiple consecutive 8-bit registers with one call. If the driver provides the ->write method, use that, otherwise loop using ->write8.
Reviewed-by: Simon Glass sjg@chromium.org Signed-off-by: Rasmus Villemoes rasmus.villemoes@prevas.dk --- drivers/rtc/rtc-uclass.c | 18 ++++++++++++++++++ include/rtc.h | 24 ++++++++++++++++++++++++ 2 files changed, 42 insertions(+)
diff --git a/drivers/rtc/rtc-uclass.c b/drivers/rtc/rtc-uclass.c index 44d76bb70f..cc5f9c7baa 100644 --- a/drivers/rtc/rtc-uclass.c +++ b/drivers/rtc/rtc-uclass.c @@ -57,6 +57,24 @@ int rtc_read(struct udevice *dev, unsigned int reg, u8 *buf, unsigned int len) return 0; }
+int rtc_write(struct udevice *dev, unsigned int reg, + const u8 *buf, unsigned int len) +{ + struct rtc_ops *ops = rtc_get_ops(dev); + + assert(ops); + if (ops->write) + return ops->write(dev, reg, buf, len); + if (!ops->write8) + return -ENOSYS; + while (len--) { + int ret = ops->write8(dev, reg++, *buf++); + if (ret < 0) + return ret; + } + return 0; +} + int rtc_read8(struct udevice *dev, unsigned int reg) { struct rtc_ops *ops = rtc_get_ops(dev); diff --git a/include/rtc.h b/include/rtc.h index 1c9c09fef8..8c66d37703 100644 --- a/include/rtc.h +++ b/include/rtc.h @@ -67,6 +67,18 @@ struct rtc_ops { int (*read)(struct udevice *dev, unsigned int reg, u8 *buf, unsigned int len);
+ /** + * write() - Write multiple 8-bit registers + * + * @dev: Device to write to + * @reg: First register to write + * @buf: Input buffer + * @len: Number of registers to write + * @return 0 if OK, -ve on error + */ + int (*write)(struct udevice *dev, unsigned int reg, + const u8 *buf, unsigned int len); + /** * read8() - Read an 8-bit register * @@ -132,6 +144,18 @@ int dm_rtc_reset(struct udevice *dev); */ int rtc_read(struct udevice *dev, unsigned int reg, u8 *buf, unsigned int len);
+/** + * rtc_write() - Write multiple 8-bit registers + * + * @dev: Device to write to + * @reg: First register to write + * @buf: Input buffer + * @len: Number of registers to write + * @return 0 if OK, -ve on error + */ +int rtc_write(struct udevice *dev, unsigned int reg, + const u8 *buf, unsigned int len); + /** * rtc_read8() - Read an 8-bit register *