i2c: sh_mobile: use core to detect 'no zero length read' quirk (7957c2e2) · Commits · 戴 / test

drivers/i2c/busses/i2c-sh_mobile.c

+5 −5

Original line number	Diff line number	Diff line
		@@ -613,11 +613,6 @@ static void sh_mobile_i2c_xfer_dma(struct sh_mobile_i2c_data *pd)
		static int start_ch(struct sh_mobile_i2c_data pd, struct i2c_msg usr_msg,
		bool do_init)
		{
		if (usr_msg->len == 0 && (usr_msg->flags & I2C_M_RD)) {
		dev_err(pd->dev, "Unsupported zero length i2c read\n");
		return -EOPNOTSUPP;
		}

		if (do_init) {
		/* Initialize channel registers */
		iic_wr(pd, ICCR, ICCR_SCP);
		@@ -758,6 +753,10 @@ static const struct i2c_algorithm sh_mobile_i2c_algorithm = {
		.master_xfer = sh_mobile_i2c_xfer,
		};

		static const struct i2c_adapter_quirks sh_mobile_i2c_quirks = {
		.flags = I2C_AQ_NO_ZERO_LEN_READ,
		};

		/*
		* r8a7740 chip has lasting errata on I2C I/O pad reset.
		* this is work-around for it.
		@@ -925,6 +924,7 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)

		adap->owner = THIS_MODULE;
		adap->algo = &sh_mobile_i2c_algorithm;
		adap->quirks = &sh_mobile_i2c_quirks;
		adap->dev.parent = &dev->dev;
		adap->retries = 5;
		adap->nr = dev->id;