ARM: davinci: mityomapl138: use cell nvmem lookup for mac address

We now support nvmem lookups and cell definitions for machine code.
Add relevant data structures for the mac-address stored in at24 EEPROM.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/board-mityomapl138.c

@@ -15,6 +15,7 @@
 #include <linux/console.h>
 #include <linux/platform_device.h>
 #include <linux/mtd/partitions.h>
+#include <linux/nvmem-provider.h>
 #include <linux/regulator/machine.h>
 #include <linux/i2c.h>
 #include <linux/platform_data/at24.h>
@@ -161,6 +162,31 @@ static void read_factory_config(struct nvmem_device *nvmem, void *context)
 	mityomapl138_cpufreq_init(partnum);
 }
 
+/*
+ * We don't define a cell for factory config as it will be accessed from the
+ * board file using the nvmem notifier chain.
+ */
+static struct nvmem_cell_info mityomapl138_nvmem_cells[] = {
+	{
+		.name		= "macaddr",
+		.offset		= 0x64,
+		.bytes		= ETH_ALEN,
+	}
+};
+
+static struct nvmem_cell_table mityomapl138_nvmem_cell_table = {
+	.nvmem_name	= "1-00500",
+	.cells		= mityomapl138_nvmem_cells,
+	.ncells		= ARRAY_SIZE(mityomapl138_nvmem_cells),
+};
+
+static struct nvmem_cell_lookup mityomapl138_nvmem_cell_lookup = {
+	.nvmem_name	= "1-00500",
+	.cell_name	= "macaddr",
+	.dev_id		= "davinci_emac.1",
+	.con_id		= "mac-address",
+};
+
 static struct at24_platform_data mityomapl138_fd_chip = {
 	.byte_len	= 256,
 	.page_size	= 8,
@@ -543,6 +569,9 @@ static void __init mityomapl138_init(void)
 
 	davinci_serial_init(da8xx_serial_device);
 
+	nvmem_add_cell_table(&mityomapl138_nvmem_cell_table);
+	nvmem_add_cell_lookups(&mityomapl138_nvmem_cell_lookup, 1);
+
 	ret = da8xx_register_i2c(0, &mityomap_i2c_0_pdata);
 	if (ret)
 		pr_warn("i2c0 registration failed: %d\n", ret);