[PATCH 3/4] ARM: boards: polyhex-debix: add support to read MAC addresses
Marco Felsch
m.felsch at pengutronix.de
Tue Aug 29 05:43:55 PDT 2023
For the Debix SoM/Baseboard combination the MAC addresses are stored on
a baseboard EEPROM in ASCII format. This commit adds the support to read
the MAC addresses from the EEPROM and set it accordingly.
Signed-off-by: Marco Felsch <m.felsch at pengutronix.de>
---
arch/arm/boards/polyhex-debix/board.c | 66 ++++++++++++++++++++++++++-
1 file changed, 65 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boards/polyhex-debix/board.c b/arch/arm/boards/polyhex-debix/board.c
index f81666ce0c93..ea4fc26a0ceb 100644
--- a/arch/arm/boards/polyhex-debix/board.c
+++ b/arch/arm/boards/polyhex-debix/board.c
@@ -6,11 +6,67 @@
#include <envfs.h>
#include <init.h>
#include <io.h>
+#include <linux/nvmem-consumer.h>
#include <mach/imx/bbu.h>
#include <mach/imx/iomux-mx8mp.h>
+#include <net.h>
+
+struct debix_polyhex_machine_data {
+ void (*ethernet_setup)(void);
+};
+
+#define ETH_ALEN_ASCII 12
+
+static int polyhex_debix_eth_register_ethaddr(struct device_node *np)
+{
+ u8 mac[ETH_ALEN];
+ u8 *data;
+ int ret;
+
+ data = nvmem_cell_get_and_read(np, "mac-address", ETH_ALEN_ASCII);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ ret = hex2bin(mac, data, ETH_ALEN);
+ if (ret)
+ goto err;
+
+ of_eth_register_ethaddr(np, mac);
+err:
+ free(data);
+
+ return ret;
+}
+
+static void polyhex_debix_ethernet_init(void)
+{
+ static const char * const aliases[] = { "ethernet0", "ethernet1" };
+ struct device_node *np, *root;
+ unsigned int i;
+
+ root = of_get_root_node();
+
+ for (i = 0; i < ARRAY_SIZE(aliases); i++) {
+ const char *alias = aliases[i];
+ int ret;
+
+ np = of_find_node_by_alias(root, alias);
+ if (!np) {
+ pr_warn("Failed to find %s\n", alias);
+ continue;
+ }
+
+ ret = polyhex_debix_eth_register_ethaddr(np);
+ if (ret) {
+ pr_warn("Failed to register MAC for %s\n", alias);
+ continue;
+ }
+ }
+}
static int polyhex_debix_probe(struct device *dev)
{
+ const struct debix_polyhex_machine_data *machine_data;
int emmc_bbu_flag = 0;
int sd_bbu_flag = 0;
u32 val;
@@ -32,12 +88,20 @@ static int polyhex_debix_probe(struct device *dev)
MX8MP_IOMUXC_GPR1_ENET_QOS_RGMII_EN;
writel(val, MX8MP_IOMUXC_GPR_BASE_ADDR + MX8MP_IOMUXC_GPR1);
+ machine_data = device_get_match_data(dev);
+ if (machine_data && machine_data->ethernet_setup)
+ machine_data->ethernet_setup();
+
return 0;
}
+static const struct debix_polyhex_machine_data debix_som_a_bmb_08 = {
+ .ethernet_setup = polyhex_debix_ethernet_init,
+};
+
static const struct of_device_id polyhex_debix_of_match[] = {
{ .compatible = "polyhex,imx8mp-debix" },
- { .compatible = "polyhex,imx8mp-debix-som-a-bmb-08" },
+ { .compatible = "polyhex,imx8mp-debix-som-a-bmb-08", .data = &debix_som_a_bmb_08 },
{ /* Sentinel */ }
};
BAREBOX_DEEP_PROBE_ENABLE(polyhex_debix_of_match);
--
2.39.2
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