[PATCH] drivers: mtd: devices: make m25p80 dt adapted.

[Sourav Poddar]

This patch helps gettimg m25p80 probed through dt.
To get the id of the exact flash type supported for dt case,
data->type is getting parsed from dt entry.

Signed-off-by: Sourav Poddar <sourav.poddar at ti.com>
---
 drivers/mtd/devices/m25p80.c |   22 +++++++++++++++++++++-
 1 files changed, 21 insertions(+), 1 deletions(-)

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 33098bf..cbfb9b3 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -855,6 +855,13 @@ static const struct spi_device_id m25p_ids[] = {
 };
 MODULE_DEVICE_TABLE(spi, m25p_ids);
 
+#ifdef CONFIG_OF
+static const struct of_device_id m25p_dt_ids[] = {
+	{ .compatible = "m25p80", },
+	{ /* sentinel */ }
+};
+#endif
+
 static const struct spi_device_id *jedec_probe(struct spi_device *spi)
 {
 	int			tmp;
@@ -909,6 +916,7 @@ static int m25p_probe(struct spi_device *spi)
 	unsigned			i;
 	struct mtd_part_parser_data	ppdata;
 	struct device_node __maybe_unused *np = spi->dev.of_node;
+	int len;
 
 #ifdef CONFIG_MTD_OF_PARTS
 	if (!of_device_is_available(np))
@@ -920,7 +928,18 @@ static int m25p_probe(struct spi_device *spi)
 	 * a chip ID, try the JEDEC id commands; they'll work for most
 	 * newer chips, even if we don't recognize the particular chip.
 	 */
-	data = spi->dev.platform_data;
+	if (!np) {
+		data = spi->dev.platform_data;
+	} else {
+		data = devm_kzalloc(&spi->dev, sizeof(*data), GFP_KERNEL);
+		if (!data)
+			return -ENOMEM;
+
+		data->type = (char *) of_get_property(np, "type", &len);
+		if (!data->type || strlen(data->type) > len)
+			return -ENODEV;
+	}
+
 	if (data && data->type) {
 		const struct spi_device_id *plat_id;
 
@@ -1098,6 +1117,7 @@ static struct spi_driver m25p80_driver = {
 	.driver = {
 		.name	= "m25p80",
 		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(m25p_dt_ids),
 	},
 	.id_table	= m25p_ids,
 	.probe	= m25p_probe,
-- 
1.7.1