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Commit fe1311b8 authored by Satyajit Desai's avatar Satyajit Desai
Browse files

soc: qcom: Add CTI trigger support for DCC 



Add support to trigger DCC via CTIs. CTI triggers can be used
to kickstart DCC operation on ceratin HW events.

Change-Id: Ic645f9a615aae4273621c96e9643508b5f723556
Signed-off-by: default avatarSatyajit Desai <sadesai@codeaurora.org>
parent a25de292

drivers/soc/qcom/dcc_v2.c

+41 −1
Original line number Diff line number Diff line
@@ -154,6 +154,7 @@ struct dcc_drvdata { 
	void			*sram_buf;

	struct msm_dump_data	sram_data;

	uint8_t			curr_list;

	uint8_t			cti_trig;

};



static bool dcc_ready(struct dcc_drvdata *drvdata)
@@ -601,7 +602,8 @@ static int dcc_enable(struct dcc_drvdata *drvdata) 
		}



		/* 4. Configure trigger, data sink and function type */

		dcc_writel(drvdata, BIT(9) | ((drvdata->data_sink << 4) |

		dcc_writel(drvdata, BIT(9) | ((drvdata->cti_trig << 8) |

			   (drvdata->data_sink << 4) |

			   (drvdata->func_type[list])), DCC_LL_CFG(list));



		/* 5. Clears interrupt status register */
@@ -1252,6 +1254,43 @@ static ssize_t dcc_write(struct device *dev, 
}

static DEVICE_ATTR(config_write, 0200, NULL, dcc_write);



static ssize_t dcc_show_cti_trig(struct device *dev,

				  struct device_attribute *attr, char *buf)

{

	struct dcc_drvdata *drvdata = dev_get_drvdata(dev);



	return scnprintf(buf, PAGE_SIZE, "%d\n", drvdata->cti_trig);

}



static ssize_t dcc_store_cti_trig(struct device *dev,

				   struct device_attribute *attr,

				   const char *buf, size_t size)

{

	unsigned long val;

	int ret = 0;

	struct dcc_drvdata *drvdata = dev_get_drvdata(dev);



	if (kstrtoul(buf, 16, &val))

		return -EINVAL;



	mutex_lock(&drvdata->mutex);



	if (drvdata->enable[drvdata->curr_list]) {

		ret = -EBUSY;

		goto out;

	}



	if (val)

		drvdata->cti_trig = 1;

	else

		drvdata->cti_trig = 0;

out:

	mutex_unlock(&drvdata->mutex);

	return ret;

}

static DEVICE_ATTR(cti_trig, 0644,

		   dcc_show_cti_trig, dcc_store_cti_trig);



static const struct device_attribute *dcc_attrs[] = {

	&dev_attr_func_type,

	&dev_attr_data_sink,
@@ -1266,6 +1305,7 @@ static const struct device_attribute *dcc_attrs[] = { 
	&dev_attr_rd_mod_wr,

	&dev_attr_curr_list,

	&dev_attr_config_write,

	&dev_attr_cti_trig,

	NULL,

};