linux-kernel - [PATCH] spi: document CS setup, hold & inactive times in header

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Date:   Wed, 23 Oct 2019 10:00:46 +0300
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <linux-spi@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <broonie@...nel.org>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        kbuild test robot <lkp@...el.com>
Subject: [PATCH] spi: document CS setup, hold & inactive times in header

This change documents the CS setup, host & inactive times. They were
omitted when the fields were added, and were caught by one of the build
bots.

Fixes: 25093bdeb6bc ("spi: implement SW control for CS times")
Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 include/linux/spi/spi.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index c40d6af2bf07..98fe8663033a 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -407,6 +407,11 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  *	     controller has native support for memory like operations.
  * @unprepare_message: undo any work done by prepare_message().
  * @slave_abort: abort the ongoing transfer request on an SPI slave controller
+ * @cs_setup: delay to be introduced by the controller after CS is asserted
+ * @cs_hold: delay to be introduced by the controller before CS is deasserted
+ * @cs_inactive: delay to be introduced by the controller after CS is
+ *	deasserted. If @cs_change_delay is used from @spi_transfer, then the
+ *	two delays will be added up.
  * @cs_gpios: LEGACY: array of GPIO descs to use as chip select lines; one per
  *	CS number. Any individual value may be -ENOENT for CS lines that
  *	are not GPIOs (driven by the SPI controller itself). Use the cs_gpiods
-- 
2.20.1