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ARM: dts: stm32: Use DT alias for the configuration EEPROM

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Use DT /aliases node to establish a stable phandle to the configuration
EEPROM. This permits the configuration EEPROM to be moved e.g. to a
different address or a different bus. Adjust the board code to handle
new phandle lookup.

Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Marek Vasut 2020-03-31 19:51:29 +02:00 • committed by Patrick Delaunay
parent 2f0b5d930d
commit f19312e5f4
2 changed files with 12 additions and 9 deletions
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6
arch/arm/dts/stm32mp15xx-dhcom.dtsi
View file

@ -10,6 +10,10 @@
#include <dt-bindings/mfd/st,stpmic1.h> #include <dt-bindings/mfd/st,stpmic1.h>
/ { / {
aliases {
eeprom0 = &eeprom0;
};
memory@c0000000 { memory@c0000000 {
device_type = "memory"; device_type = "memory";
reg = <0xC0000000 0x40000000>; reg = <0xC0000000 0x40000000>;
@ -187,7 +191,7 @@
}; };
}; };
eeprom@50 { eeprom0: eeprom@50 {
compatible = "atmel,24c02"; compatible = "atmel,24c02";
reg = <0x50>; reg = <0x50>;
pagesize = <16>; pagesize = <16>;

15
board/dhelectronics/dh_stm32mp1/board.c
View file

@ -78,22 +78,21 @@ DECLARE_GLOBAL_DATA_PTR;
int setup_mac_address(void) int setup_mac_address(void)
{ {
struct udevice *dev;
ofnode eeprom;
unsigned char enetaddr[6]; unsigned char enetaddr[6];
int ret; struct udevice *dev;
int off, ret;
ret = eth_env_get_enetaddr("ethaddr", enetaddr); ret = eth_env_get_enetaddr("ethaddr", enetaddr);
if (ret) /* ethaddr is already set */ if (ret) /* ethaddr is already set */
return 0; return 0;
eeprom = ofnode_path("/soc/i2c@5c002000/eeprom@50"); off = fdt_path_offset(gd->fdt_blob, "eeprom0");
if (!ofnode_valid(eeprom)) { if (off < 0) {
printf("Invalid hardware path to EEPROM!\n"); printf("%s: No eeprom0 path offset\n", __func__);
return -ENODEV; return off;
} }
ret = uclass_get_device_by_ofnode(UCLASS_I2C_EEPROM, eeprom, &dev); ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev);
if (ret) { if (ret) {
printf("Cannot find EEPROM!\n"); printf("Cannot find EEPROM!\n");
return ret; return ret;