From patchwork Mon May 4 21:20:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 245054 List-Id: U-Boot discussion From: rasmus.villemoes at prevas.dk (Rasmus Villemoes) Date: Mon, 4 May 2020 23:20:29 +0200 Subject: [PATCH 3/6] rtc: fall back to ->{read, write}8_array if ->{read, write}8 are not provided In-Reply-To: <20200504212032.3759-1-rasmus.villemoes@prevas.dk> References: <20200504212032.3759-1-rasmus.villemoes@prevas.dk> Message-ID: <20200504212032.3759-4-rasmus.villemoes@prevas.dk> Similar to how the rtc_{read,write}8_array functions fall back to using the {read,write}8 methods, do the opposite in the rtc_{read,write}8 functions. This way, each driver only needs to provide either ->read8 or ->read8_array to make both rtc_read8() and rtc_read8_array() work - without this, a driver that provides rtc_read8_array() would most likely just duplicate the logic here for implementing a ->read8() method in term of its ->read8_array() method. The same remarks of course apply to the write case. Signed-off-by: Rasmus Villemoes Reviewed-by: Simon Glass --- drivers/rtc/rtc-uclass.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/rtc/rtc-uclass.c b/drivers/rtc/rtc-uclass.c index 56490a876f..6bf964f937 100644 --- a/drivers/rtc/rtc-uclass.c +++ b/drivers/rtc/rtc-uclass.c @@ -44,9 +44,17 @@ int rtc_read8(struct udevice *dev, unsigned int reg) struct rtc_ops *ops = rtc_get_ops(dev); assert(ops); - if (!ops->read8) - return -ENOSYS; - return ops->read8(dev, reg); + if (ops->read8) + return ops->read8(dev, reg); + if (ops->read8_array) { + u8 buf[1]; + int ret = ops->read8_array(dev, reg, buf, 1); + + if (ret < 0) + return ret; + return buf[0]; + } + return -ENOSYS; } int rtc_read8_array(struct udevice *dev, unsigned int reg, @@ -73,9 +81,13 @@ int rtc_write8(struct udevice *dev, unsigned int reg, int val) struct rtc_ops *ops = rtc_get_ops(dev); assert(ops); - if (!ops->write8) - return -ENOSYS; - return ops->write8(dev, reg, val); + if (ops->write8) + return ops->write8(dev, reg, val); + if (ops->write8_array) { + u8 buf[1] = { val }; + return ops->write8_array(dev, reg, buf, 1); + } + return -ENOSYS; } int rtc_write8_array(struct udevice *dev, unsigned int reg,