From: Frank Li <Frank.Li@nxp.com>
To: alexandre.belloni@bootlin.com, miquel.raynal@bootlin.com,
conor.culhane@silvaco.com, joe@perches.com,
linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org,
imx@lists.linux.dev
Subject: [PATCH 2/5] i3c: add actual in i3c_priv_xfer
Date: Mon, 16 Oct 2023 11:46:29 -0400 [thread overview]
Message-ID: <20231016154632.2851957-3-Frank.Li@nxp.com> (raw)
In-Reply-To: <20231016154632.2851957-1-Frank.Li@nxp.com>
In MIPI I3C Specification:
"Ninth Bit of SDR Target Returned (Read) Data as End-of-Data: In I2C, the
ninth Data bit from Target to Controller is an ACK by the Controller. By
contrast, in I3C this bit allows the Target to end a Read, and allows the
Controller to Abort a Read. In SDR terms, the ninth bit of Read data is
referred to as the T-Bit (for ‘Transition’)"
I3C allow devices early terminate data transfer. So need "actual" field to
indicate how much get by i3c_priv_xfer.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
include/linux/i3c/device.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/i3c/device.h b/include/linux/i3c/device.h
index 90fa83464f00..f2fa7ee5d96d 100644
--- a/include/linux/i3c/device.h
+++ b/include/linux/i3c/device.h
@@ -66,6 +66,7 @@ struct i3c_priv_xfer {
void *in;
const void *out;
} data;
+ u16 actual;
enum i3c_error_code err;
};
--
2.34.1
--
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
next prev parent reply other threads:[~2023-10-16 15:47 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-16 15:46 [PATCH 0/5] i3c: master: some improvment for i3c master Frank Li
2023-10-16 15:46 ` [PATCH 1/5] i3c: master: svc: enable hotjoin default Frank Li
2023-10-17 6:48 ` Joe Perches
2023-10-17 14:04 ` Miquel Raynal
2023-10-17 14:51 ` Frank Li
2023-10-17 22:22 ` Alexandre Belloni
2023-10-16 15:46 ` Frank Li [this message]
2023-10-17 6:10 ` [PATCH 2/5] i3c: add actual in i3c_priv_xfer Jarkko Nikula
2023-10-16 15:46 ` [PATCH 3/5] i3c: svc: rename read_len as actual_len Frank Li
2023-10-17 14:07 ` Miquel Raynal
2023-10-17 20:43 ` Frank Li
2023-10-16 15:46 ` [PATCH 4/5] i3c: master: svc return actual transfer data len Frank Li
2023-10-17 8:33 ` Jarkko Nikula
2023-10-18 20:18 ` Frank Li
2023-10-17 14:10 ` Miquel Raynal
2023-10-18 20:26 ` Frank Li
2023-10-16 15:46 ` [PATCH 5/5] i3c: add API i3c_dev_gettstatus_format1() to get target device status Frank Li
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