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board: amlogic: odroid: add runtime detection of the N2/N2+/C4/HC4 variants

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Use the ADC channel 1 to check the hardware revision of the board and
detect the N2 vs. N2+ and the C4 vs. HC4 variants. Each of them use
different dtb file, so adjust fdtfile environment variable to the
detected variant.

The ADC min/max values for each variant are taken from the vendor code,
adjusted to the 12-bit ADC driver operation mode (vendor code use 10-bit
mode).

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
This commit is contained in:
Marek Szyprowski 2021-02-04 10:11:45 +01:00 committed by Neil Armstrong
parent 4547551aa0
commit 8bc780106c
5 changed files with 98 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/dts/meson-g12b-odroid-n2-u-boot.dtsi
View File

@ -5,3 +5,9 @@
*/
#include "meson-g12-common-u-boot.dtsi"
/* SARADC is needed for proper board variant detection */
&saradc {
status = "okay";
vref-supply = <&vddao_1v8>;
};

6
arch/arm/dts/meson-sm1-odroid-c4-u-boot.dtsi
View File

@ -12,6 +12,12 @@
snps,reset-active-low;
};
/* SARADC is needed for proper board variant detection */
&saradc {
status = "okay";
vref-supply = <&vddao_1v8>;
};
&tflash_vdd {
gpio = <&gpio_ao GPIOAO_3 GPIO_OPEN_DRAIN>;
};

80
board/amlogic/odroid-n2/odroid-n2.c
View File

@ -6,6 +6,7 @@
#include <common.h>
#include <dm.h>
#include <adc.h>
#include <env.h>
#include <init.h>
#include <net.h>
@ -19,6 +20,11 @@
#define EFUSE_MAC_SIZE 12
#define MAC_ADDR_LEN 6
#define ODROID_HW_VS_ADC_CHANNEL 1
#define MESON_SOC_ID_G12B 0x29
#define MESON_SOC_ID_SM1 0x2b
int mmc_get_env_dev(void)
{
if (meson_get_boot_device() == BOOT_DEVICE_EMMC)
@ -26,6 +32,79 @@ int mmc_get_env_dev(void)
return 0;
}
/* Variant detection is based on the ADC RAW values for the channel #1 */
static struct meson_odroid_boards {
unsigned int soc_id;
unsigned int adc_min;
unsigned int adc_max;
char *variant;
} boards[] = {
/* OdroidN2 rev 2018,7,23 */
{ MESON_SOC_ID_G12B, 80 * 4, 90 * 4, "n2" },
/* OdroidN2 rev 2018,12,6 */
{ MESON_SOC_ID_G12B, 160 * 4, 170 * 4, "n2" },
/* OdroidN2 rev 2019,1,17 */
{ MESON_SOC_ID_G12B, 245 * 4, 255 * 4, "n2" },
/* OdroidN2 rev 2019,2,7 */
{ MESON_SOC_ID_G12B, 330 * 4, 350 * 4, "n2" },
/* OdroidN2plus rev 2019,11,20 */
{ MESON_SOC_ID_G12B, 410 * 4, 430 * 4, "n2_plus" },
/* OdroidC4 rev 2020,01,29 */
{ MESON_SOC_ID_SM1, 80 * 4, 100 * 4, "c4" },
/* OdroidHC4 rev 2019,12,10 */
{ MESON_SOC_ID_SM1, 300 * 4, 320 * 4, "hc4" },
/* OdroidC4 rev 2019,11,29 */
{ MESON_SOC_ID_SM1, 335 * 4, 345 * 4, "c4" },
/* OdroidHC4 rev 2020,8,7 */
{ MESON_SOC_ID_SM1, 590 * 4, 610 * 4, "hc4" },
};
static void odroid_set_fdtfile(char *soc, char *variant)
{
char s[128];
snprintf(s, sizeof(s), "amlogic/meson-%s-odroid-%s.dtb", soc, variant);
env_set("fdtfile", s);
}
static int odroid_detect_variant(void)
{
char *variant = "", *soc = "";
unsigned int adcval = 0;
int ret, i, soc_id = 0;
if (of_machine_is_compatible("amlogic,sm1")) {
soc_id = MESON_SOC_ID_SM1;
soc = "sm1";
} else if (of_machine_is_compatible("amlogic,g12b")) {
soc_id = MESON_SOC_ID_G12B;
soc = "g12b";
} else {
return -1;
}
ret = adc_channel_single_shot("adc@9000", ODROID_HW_VS_ADC_CHANNEL,
&adcval);
if (ret)
return ret;
for (i = 0 ; i < ARRAY_SIZE(boards) ; ++i) {
if (soc_id == boards[i].soc_id &&
adcval >= boards[i].adc_min &&
adcval < boards[i].adc_max) {
variant = boards[i].variant;
break;
}
}
printf("Board variant: %s\n", variant);
env_set("variant", variant);
odroid_set_fdtfile(soc, variant);
return 0;
}
int misc_init_r(void)
{
u8 mac_addr[MAC_ADDR_LEN];
@ -58,5 +137,6 @@ int misc_init_r(void)
meson_generate_serial_ethaddr();
}
odroid_detect_variant();
return 0;
}

4
configs/odroid-c4_defconfig
View File

@ -8,7 +8,7 @@ CONFIG_DM_GPIO=y
CONFIG_MESON_G12A=y
CONFIG_DEBUG_UART_BASE=0xff803000
CONFIG_DEBUG_UART_CLOCK=24000000
CONFIG_IDENT_STRING=" odroid-c4"
CONFIG_IDENT_STRING=" odroid-c4/hc4"
CONFIG_DEFAULT_DEVICE_TREE="meson-sm1-odroid-c4"
CONFIG_DEBUG_UART=y
CONFIG_OF_BOARD_SETUP=y
@ -26,6 +26,8 @@ CONFIG_CMD_REGULATOR=y
CONFIG_OF_CONTROL=y
CONFIG_SYS_RELOC_GD_ENV_ADDR=y
CONFIG_NET_RANDOM_ETHADDR=y
CONFIG_ADC=y
CONFIG_SARADC_MESON=y
CONFIG_DM_MMC=y
CONFIG_MMC_MESON_GX=y
CONFIG_PHY_REALTEK=y

4
configs/odroid-n2_defconfig
View File

@ -8,7 +8,7 @@ CONFIG_DM_GPIO=y
CONFIG_MESON_G12A=y
CONFIG_DEBUG_UART_BASE=0xff803000
CONFIG_DEBUG_UART_CLOCK=24000000
CONFIG_IDENT_STRING=" odroid-n2"
CONFIG_IDENT_STRING=" odroid-n2/n2_plus"
CONFIG_DEFAULT_DEVICE_TREE="meson-g12b-odroid-n2"
CONFIG_DEBUG_UART=y
CONFIG_OF_BOARD_SETUP=y
@ -26,6 +26,8 @@ CONFIG_CMD_REGULATOR=y
CONFIG_OF_CONTROL=y
CONFIG_SYS_RELOC_GD_ENV_ADDR=y
CONFIG_NET_RANDOM_ETHADDR=y
CONFIG_ADC=y
CONFIG_SARADC_MESON=y
CONFIG_DM_MMC=y
CONFIG_MMC_MESON_GX=y
CONFIG_PHY_REALTEK=y