Signed-off-by: Antoine Tenart <antoine.tenart@xxxxxxxxxxxxxxxxxx>
---
drivers/of/overlay-manager/Kconfig | 10 ++++++++++
drivers/w1/slaves/w1_ds2431.c | 39 ++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)
diff --git a/drivers/of/overlay-manager/Kconfig b/drivers/of/overlay-manager/Kconfig
index 1a36613c0c53..ad0a5b8e9e5e 100644
--- a/drivers/of/overlay-manager/Kconfig
+++ b/drivers/of/overlay-manager/Kconfig
@@ -16,4 +16,14 @@ config OF_OVERLAY_MGR_FORMAT_CHIP
endmenu
+menu "Overlay Manager detectors"
+
+config OF_OVERLAY_MGR_DETECTOR_DS2431
+ bool "Dip header on a DS2431 EEPROM"
+ depends on W1_SLAVE_DS2431
+ help
+ Enable dip header DS2431 EEPROM support.
+
+endmenu
+
endif
diff --git a/drivers/w1/slaves/w1_ds2431.c b/drivers/w1/slaves/w1_ds2431.c
index 80572cb63ba8..760325f9a2bd 100644
--- a/drivers/w1/slaves/w1_ds2431.c
+++ b/drivers/w1/slaves/w1_ds2431.c
@@ -15,6 +15,9 @@
#include <linux/device.h>
#include <linux/types.h>
#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <linux/overlay-manager.h>
#include "../w1.h"
#include "../w1_int.h"
@@ -280,7 +283,43 @@ static const struct attribute_group *w1_f2d_groups[] = {
NULL,
};
+#if IS_ENABLED(CONFIG_OF_OVERLAY_MGR_DETECTOR_DS2431)
+static int chip_dip_callback(struct w1_slave *sl)
+{
+ char **candidates = NULL;
+ int i, n, err = 0;
+ u8 *data;
+
+ data = kzalloc(OVERLAY_MGR_DIP_MAX_SZ, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ /* sizeof(struct chip_header) is a mulitple of 8 */
+ for (i = 0; i < OVERLAY_MGR_DIP_MAX_SZ; i += 8) {
+ if (w1_f2d_readblock(sl, i, 8, &data[i])) {
+ err = -EIO;
+ goto end;
+ }
+ }
+
+ overlay_mgr_parse(&sl->dev, data, &candidates, &n);
+ if (!n) {
+ err = -EINVAL;
+ goto end;
+ }
+
+ err = overlay_mgr_apply(&sl->dev, candidates, n);
+
+end:
+ kfree(data);
+ return err;
+}
+#endif
+
static struct w1_family_ops w1_f2d_fops = {
+#if IS_ENABLED(CONFIG_OF_OVERLAY_MGR_DETECTOR_DS2431)
+ .callback = chip_dip_callback,
+#endif
.groups = w1_f2d_groups,
};
--
2.10.1
--
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