Commit 5d6fbc96 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Daniel Lezcano
Browse files

thermal/drivers/int340x: processor_thermal: Export additional attributes 



Export additional attributes:

ddr_data_rate (RO) : Show current DDR (Double Data Rate) data rate.
rfi_restriction (RW) : Show or set current state for RFI (Radio
			Frequency Interference) protection.

These attributes use mailbox commands to get/set information. Here
command codes are:
0x0007: Read RFI restriction
0x0107: Read DDR data rate
0x0008: Write RFI restriction

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210517061441.1921901-3-srinivas.pandruvada@linux.intel.com
parent fb5a6ec8

drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c

+55 −0
Original line number Diff line number Diff line
@@ -190,6 +190,59 @@ static DEVICE_ATTR_RO(ddr_data_rate_point_2); 
static DEVICE_ATTR_RO(ddr_data_rate_point_3);

static DEVICE_ATTR_RW(rfi_disable);



static ssize_t rfi_restriction_store(struct device *dev,

				     struct device_attribute *attr,

				     const char *buf, size_t count)

{

	u16 cmd_id = 0x0008;

	u32 cmd_resp;

	u32 input;

	int ret;



	ret = kstrtou32(buf, 10, &input);

	if (ret)

		return ret;



	ret = processor_thermal_send_mbox_cmd(to_pci_dev(dev), cmd_id, input, &cmd_resp);

	if (ret)

		return ret;



	return count;

}



static ssize_t rfi_restriction_show(struct device *dev,

				    struct device_attribute *attr,

				    char *buf)

{

	u16 cmd_id = 0x0007;

	u32 cmd_resp;

	int ret;



	ret = processor_thermal_send_mbox_cmd(to_pci_dev(dev), cmd_id, 0, &cmd_resp);

	if (ret)

		return ret;



	return sprintf(buf, "%u\n", cmd_resp);

}



static ssize_t ddr_data_rate_show(struct device *dev,

				  struct device_attribute *attr,

				  char *buf)

{

	u16 cmd_id = 0x0107;

	u32 cmd_resp;

	int ret;



	ret = processor_thermal_send_mbox_cmd(to_pci_dev(dev), cmd_id, 0, &cmd_resp);

	if (ret)

		return ret;



	return sprintf(buf, "%u\n", cmd_resp);

}



static DEVICE_ATTR_RW(rfi_restriction);

static DEVICE_ATTR_RO(ddr_data_rate);



static struct attribute *dvfs_attrs[] = {

	&dev_attr_rfi_restriction_run_busy.attr,

	&dev_attr_rfi_restriction_err_code.attr,
@@ -199,6 +252,8 @@ static struct attribute *dvfs_attrs[] = { 
	&dev_attr_ddr_data_rate_point_2.attr,

	&dev_attr_ddr_data_rate_point_3.attr,

	&dev_attr_rfi_disable.attr,

	&dev_attr_ddr_data_rate.attr,

	&dev_attr_rfi_restriction.attr,

	NULL

};