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ptp: ocp: expose config and temperature for ART card

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Orolia card has disciplining configuration and temperature table
stored in EEPROM. This patch exposes them as binary attributes to
have read and write access.

Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Co-developed-by: Charles Parent <charles.parent@orolia2s.com>
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: Vadim Fedorenko <vadfed@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vadim Fedorenko 2022-10-21 02:24:32 +03:00 committed by David S. Miller
parent 9c44a7ac17
commit ee6439aaad
1 changed files with 136 additions and 0 deletions
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136
drivers/ptp/ptp_ocp.c
View file

@ -690,6 +690,9 @@ static struct ocp_resource ocp_fb_resource[] = {
{ }
};
#define OCP_ART_CONFIG_SIZE 144
#define OCP_ART_TEMP_TABLE_SIZE 368
struct ocp_art_gpio_reg {
struct {
u32 gpio;
@ -3334,6 +3337,130 @@ DEVICE_FREQ_GROUP(freq2, 1);
DEVICE_FREQ_GROUP(freq3, 2);
DEVICE_FREQ_GROUP(freq4, 3);
static ssize_t
disciplining_config_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
loff_t off, size_t count)
{
struct ptp_ocp *bp = dev_get_drvdata(kobj_to_dev(kobj));
size_t size = OCP_ART_CONFIG_SIZE;
struct nvmem_device *nvmem;
ssize_t err;
nvmem = ptp_ocp_nvmem_device_get(bp, NULL);
if (IS_ERR(nvmem))
return PTR_ERR(nvmem);
if (off > size) {
err = 0;
goto out;
}
if (off + count > size)
count = size - off;
// the configuration is in the very beginning of the EEPROM
err = nvmem_device_read(nvmem, off, count, buf);
if (err != count) {
err = -EFAULT;
goto out;
}
out:
ptp_ocp_nvmem_device_put(&nvmem);
return err;
}
static ssize_t
disciplining_config_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
loff_t off, size_t count)
{
struct ptp_ocp *bp = dev_get_drvdata(kobj_to_dev(kobj));
struct nvmem_device *nvmem;
ssize_t err;
/* Allow write of the whole area only */
if (off || count != OCP_ART_CONFIG_SIZE)
return -EFAULT;
nvmem = ptp_ocp_nvmem_device_get(bp, NULL);
if (IS_ERR(nvmem))
return PTR_ERR(nvmem);
err = nvmem_device_write(nvmem, 0x00, count, buf);
if (err != count)
err = -EFAULT;
ptp_ocp_nvmem_device_put(&nvmem);
return err;
}
static BIN_ATTR_RW(disciplining_config, OCP_ART_CONFIG_SIZE);
static ssize_t
temperature_table_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
loff_t off, size_t count)
{
struct ptp_ocp *bp = dev_get_drvdata(kobj_to_dev(kobj));
size_t size = OCP_ART_TEMP_TABLE_SIZE;
struct nvmem_device *nvmem;
ssize_t err;
nvmem = ptp_ocp_nvmem_device_get(bp, NULL);
if (IS_ERR(nvmem))
return PTR_ERR(nvmem);
if (off > size) {
err = 0;
goto out;
}
if (off + count > size)
count = size - off;
// the configuration is in the very beginning of the EEPROM
err = nvmem_device_read(nvmem, 0x90 + off, count, buf);
if (err != count) {
err = -EFAULT;
goto out;
}
out:
ptp_ocp_nvmem_device_put(&nvmem);
return err;
}
static ssize_t
temperature_table_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
loff_t off, size_t count)
{
struct ptp_ocp *bp = dev_get_drvdata(kobj_to_dev(kobj));
struct nvmem_device *nvmem;
ssize_t err;
/* Allow write of the whole area only */
if (off || count != OCP_ART_TEMP_TABLE_SIZE)
return -EFAULT;
nvmem = ptp_ocp_nvmem_device_get(bp, NULL);
if (IS_ERR(nvmem))
return PTR_ERR(nvmem);
err = nvmem_device_write(nvmem, 0x90, count, buf);
if (err != count)
err = -EFAULT;
ptp_ocp_nvmem_device_put(&nvmem);
return err;
}
static BIN_ATTR_RW(temperature_table, OCP_ART_TEMP_TABLE_SIZE);
static struct attribute *fb_timecard_attrs[] = {
&dev_attr_serialnum.attr,
&dev_attr_gnss_sync.attr,
@ -3353,9 +3480,11 @@ static struct attribute *fb_timecard_attrs[] = {
&dev_attr_tod_correction.attr,
NULL,
};
static const struct attribute_group fb_timecard_group = {
.attrs = fb_timecard_attrs,
};
static const struct ocp_attr_group fb_timecard_groups[] = {
{ .cap = OCP_CAP_BASIC, .group = &fb_timecard_group },
{ .cap = OCP_CAP_SIGNAL, .group = &fb_timecard_signal0_group },
@ -3384,8 +3513,15 @@ static struct attribute *art_timecard_attrs[] = {
NULL,
};
static struct bin_attribute *bin_art_timecard_attrs[] = {
&bin_attr_disciplining_config,
&bin_attr_temperature_table,
NULL,
};
static const struct attribute_group art_timecard_group = {
.attrs = art_timecard_attrs,
.bin_attrs = bin_art_timecard_attrs,
};
static const struct ocp_attr_group art_timecard_groups[] = {