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Commit 1ee2a3d0 authored by Gilad Avidov's avatar Gilad Avidov Committed by Gerrit - the friendly Code Review server
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qup_i2c: dump gpio config on error 



Dump the configuration of relevant GPIOs
on timeout error.

Change-Id: Iab5aa57befc146c232d12759990b0b8a23a68fe1
Signed-off-by: default avatarGilad Avidov <gavidov@codeaurora.org>
parent 5f4d31f2

drivers/i2c/busses/i2c-qup.c

+35 −0
Original line number Diff line number Diff line
@@ -961,6 +961,38 @@ recovery_end: 
	enable_irq(dev->err_irq);

}



static void i2c_qup_dump_gpio_conf(struct qup_i2c_dev *dev, int gpio_num,

		const char *gpio_name, enum msm_gpiomux_setting setting,

		const char *setting_name)

{

	struct gpiomux_setting cur_conf;

	if (msm_gpiomux_write(gpio_num, setting, NULL, &cur_conf)) {

		dev_err(dev->dev, "error reading %s-gpio:#%d %s setting\n",

					gpio_name, gpio_num, setting_name);

		return;

	}

	dev_info(dev->dev,

		"dump %s-gpio:#%d state:%s func:%d drv:%d pull:%d dir:%d\n",

		gpio_name, gpio_num, setting_name, cur_conf.func, cur_conf.drv,

		cur_conf.pull, cur_conf.dir);



	if (msm_gpiomux_write(gpio_num, setting, &cur_conf, NULL))

		dev_err(dev->dev, "error restoring %s-gpio:#%d %s setting\n",

					gpio_name, gpio_num, setting_name);

}



static void i2c_qup_dump_gpios(struct qup_i2c_dev *dev)

{

	i2c_qup_dump_gpio_conf(dev, dev->i2c_gpios[0], i2c_rsrcs[0],

						GPIOMUX_ACTIVE, "active");

	i2c_qup_dump_gpio_conf(dev, dev->i2c_gpios[0], i2c_rsrcs[0],

						GPIOMUX_SUSPENDED, "suspended");

	i2c_qup_dump_gpio_conf(dev, dev->i2c_gpios[1], i2c_rsrcs[1],

						GPIOMUX_ACTIVE, "active");

	i2c_qup_dump_gpio_conf(dev, dev->i2c_gpios[1], i2c_rsrcs[1],

						GPIOMUX_SUSPENDED, "suspended");

}



static int

qup_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)

{
@@ -1198,6 +1230,7 @@ qup_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) 
				dev_err(dev->dev,

					"Transaction timed out, SL-AD = 0x%x\n",

					dev->msg->addr);

				i2c_qup_dump_gpios(dev);



				dev_err(dev->dev, "I2C Status: %x\n", istatus);

				dev_err(dev->dev, "QUP Status: %x\n", qstatus);
@@ -1221,9 +1254,11 @@ timeout_err: 
				} else if (dev->err < 0) {

					dev_err(dev->dev,

					"QUP data xfer error %d\n", dev->err);

					i2c_qup_dump_gpios(dev);

					ret = dev->err;

					goto out_err;

				} else if (dev->err > 0) {

					i2c_qup_dump_gpios(dev);

					/*

					 * ISR returns +ve error if error code

					 * is I2C related, e.g. unexpected start