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Date: Fri, 21 Oct 2022 02:24:32 +0300
From: Vadim Fedorenko <vfedorenko@...ek.ru>
To: Richard Cochran <richardcochran@...il.com>,
Jonathan Lemon <jonathan.lemon@...il.com>,
Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, Vadim Fedorenko <vadfed@...com>,
Charles Parent <charles.parent@...lia2s.com>
Subject: [PATCH net-next v6 4/5] ptp: ocp: expose config and temperature for ART card
From: Vadim Fedorenko <vadfed@...com>
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@...il.com>
Co-developed-by: Charles Parent <charles.parent@...lia2s.com>
Signed-off-by: Jonathan Lemon <jonathan.lemon@...il.com>
Signed-off-by: Vadim Fedorenko <vadfed@...com>
---
drivers/ptp/ptp_ocp.c | 136 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 136 insertions(+)
diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index 223980d725fe..d2d486ccd714 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -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[] = {
--
2.27.0
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