From 3ef3e5cd72aa3b8e31e06825f9ff90f3d1b6a378 Mon Sep 17 00:00:00 2001
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Mon, 23 Jul 2018 22:26:14 +0200
Subject: [PATCH] i2c: rcar: use core to detect 'no zero length' quirk
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And don't reimplement in the driver.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
---
drivers/i2c/busses/i2c-rcar.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 2688520110d1bd..791a4aa34fdd4e 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -796,14 +796,8 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
if (ret < 0)
goto out;
- for (i = 0; i < num; i++) {
- /* This HW can't send STOP after address phase */
- if (msgs[i].len == 0) {
- ret = -EOPNOTSUPP;
- goto out;
- }
+ for (i = 0; i < num; i++)
rcar_i2c_request_dma(priv, msgs + i);
- }
/* init first message */
priv->msg = msgs;
@@ -890,6 +884,10 @@ static const struct i2c_algorithm rcar_i2c_algo = {
.unreg_slave = rcar_unreg_slave,
};
+static const struct i2c_adapter_quirks rcar_i2c_quirks = {
+ .flags = I2C_AQ_NO_ZERO_LEN,
+};
+
static const struct of_device_id rcar_i2c_dt_ids[] = {
{ .compatible = "renesas,i2c-r8a7778", .data = (void *)I2C_RCAR_GEN1 },
{ .compatible = "renesas,i2c-r8a7779", .data = (void *)I2C_RCAR_GEN1 },
@@ -943,6 +941,7 @@ static int rcar_i2c_probe(struct platform_device *pdev)
adap->dev.parent = dev;
adap->dev.of_node = dev->of_node;
adap->bus_recovery_info = &rcar_i2c_bri;
+ adap->quirks = &rcar_i2c_quirks;
i2c_set_adapdata(adap, priv);
strlcpy(adap->name, pdev->name, sizeof(adap->name));
--
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