From patchwork Mon Jul 6 20:01:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 240830 List-Id: U-Boot discussion From: rasmus.villemoes at prevas.dk (Rasmus Villemoes) Date: Mon, 6 Jul 2020 22:01:12 +0200 Subject: [PATCH v4 03/11] rtc: fall back to ->{read, write} if ->{read, write}8 are not provided In-Reply-To: <20200706200120.23093-1-rasmus.villemoes@prevas.dk> References: <20200706200120.23093-1-rasmus.villemoes@prevas.dk> Message-ID: <20200706200120.23093-4-rasmus.villemoes@prevas.dk> Similar to how the dm_rtc_{read,write} 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 ->read to make both rtc_read8() and dm_rtc_read() work - without this, a driver that provides ->read() would most likely just duplicate the logic here for implementing a ->read8() method in term of its ->read() method. The same remarks of course apply to the write case. Reviewed-by: Simon Glass Reviewed-by: Heiko Schocher Signed-off-by: Rasmus Villemoes --- drivers/rtc/rtc-uclass.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/rtc/rtc-uclass.c b/drivers/rtc/rtc-uclass.c index 44da500c03..8035f7fe9c 100644 --- a/drivers/rtc/rtc-uclass.c +++ b/drivers/rtc/rtc-uclass.c @@ -83,9 +83,17 @@ 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->read) { + u8 buf[1]; + int ret = ops->read(dev, reg, buf, 1); + + if (ret < 0) + return ret; + return buf[0]; + } + return -ENOSYS; } int rtc_write8(struct udevice *dev, unsigned int reg, int val) @@ -93,9 +101,14 @@ 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->write) { + u8 buf[1] = { val }; + + return ops->write(dev, reg, buf, 1); + } + return -ENOSYS; } int rtc_read16(struct udevice *dev, unsigned int reg, u16 *valuep)