netdev - [PATCH net-next 4/6] i2c: npcm7xx: Allow 255 byte block SMBus transfers

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Message-Id: <20211101090405.1405987-5-matt@codeconstruct.com.au>
Date:   Mon,  1 Nov 2021 17:04:03 +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 4/6] i2c: npcm7xx: Allow 255 byte block SMBus transfers

255 byte support has been tested on a npcm750 board

Signed-off-by: Matt Johnston <matt@...econstruct.com.au>
---
 drivers/i2c/busses/i2c-npcm7xx.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-npcm7xx.c b/drivers/i2c/busses/i2c-npcm7xx.c
index 2ad166355ec9..6d60f65add85 100644
--- a/drivers/i2c/busses/i2c-npcm7xx.c
+++ b/drivers/i2c/busses/i2c-npcm7xx.c
@@ -1399,7 +1399,7 @@ static void npcm_i2c_irq_master_handler_read(struct npcm_i2c *bus)
 		if (bus->read_block_use) {
 			/* first byte in block protocol is the size: */
 			data = npcm_i2c_rd_byte(bus);
-			data = clamp_val(data, 1, I2C_SMBUS_BLOCK_MAX);
+			data = clamp_val(data, 1, I2C_SMBUS_V3_BLOCK_MAX);
 			bus->rd_size = data + block_extra_bytes_size;
 			bus->rd_buf[bus->rd_ind++] = data;
 
@@ -2187,6 +2187,7 @@ static u32 npcm_i2c_functionality(struct i2c_adapter *adap)
 	       I2C_FUNC_SMBUS_EMUL |
 	       I2C_FUNC_SMBUS_BLOCK_DATA |
 	       I2C_FUNC_SMBUS_PEC |
+	       I2C_FUNC_SMBUS_V3_BLOCK |
 	       I2C_FUNC_SLAVE;
 }
 
-- 
2.32.0