[PATCH v2 07/25] ARM: davinci: mityomapl138: use cell nvmem lookup for mac address

Bartosz Golaszewski
2018-11-13T14:02:11Z

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>
---
arch/arm/mach-davinci/board-mityomapl138.c | 29 ++++++++++++++++++++++
1 file changed, 29 insertions(+)

diff --git a/arch/arm/mach-davinci/board-mityomapl138.c b/arch/arm/mach-davinci/board-mityomapl138.c
index 2933e0c87cfa..8df16e81b69e 100644
--- a/arch/arm/mach-davinci/board-mityomapl138.c
+++ b/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);
--
2.19.1