netdev - [PATCH net-next 3/6] i2c: aspeed: Allow 255 byte block transfers

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Date:   Mon,  1 Nov 2021 17:04:02 +0800
From:   Matt Johnston <matt@...econstruct.com.au>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Zev Weiss <zev@...ilderbeest.net>, Wolfram Sang <wsa@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Brendan Higgins <brendanhiggins@...gle.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        Avi Fishman <avifishman70@...il.com>,
        Tomer Maimon <tmaimon77@...il.com>,
        Tali Perry <tali.perry1@...il.com>,
        Patrick Venture <venture@...gle.com>,
        Nancy Yuen <yuenn@...gle.com>,
        Benjamin Fair <benjaminfair@...gle.com>,
        Jeremy Kerr <jk@...econstruct.com.au>,
        linux-i2c@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next 3/6] i2c: aspeed: Allow 255 byte block transfers

255 byte transfers have been tested on an AST2500 board

Signed-off-by: Matt Johnston <matt@...econstruct.com.au>
Reviewed-by: Brendan Higgins <brendanhiggins@...gle.com>
---
 drivers/i2c/busses/i2c-aspeed.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index 67e8b97c0c95..7395f3702fae 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -533,7 +533,7 @@ static u32 aspeed_i2c_master_irq(struct aspeed_i2c_bus *bus, u32 irq_status)
 		msg->buf[bus->buf_index++] = recv_byte;
 
 		if (msg->flags & I2C_M_RECV_LEN) {
-			if (unlikely(recv_byte > I2C_SMBUS_BLOCK_MAX)) {
+			if (unlikely(recv_byte > I2C_SMBUS_V3_BLOCK_MAX)) {
 				bus->cmd_err = -EPROTO;
 				aspeed_i2c_do_stop(bus);
 				goto out_no_complete;
@@ -718,7 +718,8 @@ static int aspeed_i2c_master_xfer(struct i2c_adapter *adap,
 
 static u32 aspeed_i2c_functionality(struct i2c_adapter *adap)
 {
-	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | I2C_FUNC_SMBUS_BLOCK_DATA;
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
+		I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_V3_BLOCK;
 }
 
 #if IS_ENABLED(CONFIG_I2C_SLAVE)
-- 
2.32.0