[PATCH v4 09/14] spacemit: k1: add TLV EEPROM support in SPL
Guodong Xu
guodong at riscstar.com
Tue May 19 12:26:27 CEST 2026
From: Raymond Mao <raymond.mao at riscstar.com>
And support for required components including clock, I2C controller,
and I2C EEPROM.
Signed-off-by: Raymond Mao <raymond.mao at riscstar.com>
Signed-off-by: Guodong Xu <guodong at riscstar.com>
---
v4:
- DT: drop forked i2c/eeprom nodes; only bootph markers in overlay.
- Drop reset_early_init().
- spl_boot_device() -> BOOT_DEVICE_NOR; stub pmic_init/spl_board_init.
- Enable SPL_I2C/SPL_I2C_EEPROM/SPL_CMD_TLV_EEPROM.
---
arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi | 9 +++
board/spacemit/k1/spl.c | 93 ++++++++++++++++++++++++++++++-
board/spacemit/k1/tlv_codes.h | 22 ++++++++
configs/spacemit_k1_defconfig | 8 +++
4 files changed, 131 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi b/arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi
index fbee8763a21..ac56bf512ad 100644
--- a/arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi
+++ b/arch/riscv/dts/k1-bananapi-f3-u-boot.dtsi
@@ -64,3 +64,12 @@
&syscon_apbc {
bootph-pre-ram;
};
+
+&i2c2 {
+ bootph-pre-ram;
+ resets = <&syscon_apbc RESET_TWSI2>;
+
+ eeprom at 50 {
+ bootph-pre-ram;
+ };
+};
diff --git a/board/spacemit/k1/spl.c b/board/spacemit/k1/spl.c
index 78f26616347..e862548f980 100644
--- a/board/spacemit/k1/spl.c
+++ b/board/spacemit/k1/spl.c
@@ -3,10 +3,77 @@
* Copyright (c) 2025-2026, RISCstar Ltd.
*/
+#include <asm/io.h>
+#include <clk.h>
+#include <clk-uclass.h>
+#include <configs/k1.h>
#include <dm/device.h>
#include <dm/uclass.h>
+#include <i2c.h>
+#include <linux/delay.h>
#include <log.h>
#include <spl.h>
+#include <tlv_eeprom.h>
+
+#define MUX_MODE4 4
+#define EDGE_NONE BIT(6)
+#define PULL_UP (6 << 13) /* bit[15:13] 110 */
+#define PAD_DS_MEDIUM BIT(12)
+#define PAD_1V8_DS2 PAD_DS_MEDIUM
+#define I2C_PIN_CONFIG(x) ((x) | EDGE_NONE | PULL_UP | PAD_1V8_DS2)
+#define I2C_BUF_SIZE 64
+
+#define MFP_GPIO_84 0xd401e154
+#define MFP_GPIO_85 0xd401e158
+
+static void i2c_early_init(void)
+{
+ struct udevice *bus;
+
+ // eeprom: I2C2, pin group(GPIO_84, GPIO_85)
+ writel(I2C_PIN_CONFIG(MUX_MODE4), (void __iomem *)MFP_GPIO_84);
+ writel(I2C_PIN_CONFIG(MUX_MODE4), (void __iomem *)MFP_GPIO_85);
+ udelay(100);
+ uclass_first_device(UCLASS_I2C, &bus);
+ while (bus) {
+ uclass_next_device(&bus);
+ if (!bus)
+ break;
+ }
+}
+
+int read_product_name(char *name, int size)
+{
+ u8 eeprom_data[TLV_TOTAL_LEN_MAX], *p;
+ struct tlvinfo_header *tlv_hdr;
+ struct tlvinfo_tlv *tlv_entry;
+ int ret, i = 0;
+ u32 entry_size;
+
+ if (!name || size <= 0)
+ return -EINVAL;
+ ret = read_tlvinfo_tlv_eeprom(eeprom_data, &tlv_hdr,
+ &tlv_entry, i);
+ if (ret)
+ return ret;
+ p = (u8 *)tlv_entry;
+ for (i = 0; i < tlv_hdr->totallen; ) {
+ if (tlv_entry->type == TLV_CODE_PRODUCT_NAME) {
+ if (tlv_entry->length < size)
+ size = tlv_entry->length;
+ memset(name, 0, size);
+ memcpy(name, &tlv_entry->value[0], size);
+ return 0;
+ }
+ if (tlv_entry->type == TLV_CODE_CRC_32)
+ return -ENOENT;
+ entry_size = tlv_entry->length + sizeof(struct tlvinfo_tlv);
+ i += entry_size;
+ p += entry_size;
+ tlv_entry = (struct tlvinfo_tlv *)p;
+ }
+ return -ENOENT;
+}
static void clk_early_init(void)
{
@@ -44,6 +111,7 @@ void serial_early_init(void)
void board_init_f(ulong dummy)
{
+ u8 i2c_buf[I2C_BUF_SIZE] = { 0 };
int ret;
ret = spl_early_init();
@@ -54,10 +122,33 @@ void board_init_f(ulong dummy)
clk_early_init();
serial_early_init();
+
preloader_console_init();
+
+ i2c_early_init();
+ ret = read_product_name(i2c_buf, I2C_BUF_SIZE);
+ if (ret)
+ log_info("Fail to detect board:%d\n", ret);
+ else
+ log_info("Get board name:%s\n", (char *)i2c_buf);
}
u32 spl_boot_device(void)
{
- return BOOT_DEVICE_NONE;
+ return BOOT_DEVICE_NOR;
+}
+
+void pmic_init(void)
+{
+ struct udevice *pmic_dev = NULL;
+ int ret;
+
+ ret = uclass_get_device(UCLASS_PMIC, 0, &pmic_dev);
+ if (ret)
+ panic("Fail to detect PMIC:%d\n", ret);
+}
+
+void spl_board_init(void)
+{
+ pmic_init();
}
diff --git a/board/spacemit/k1/tlv_codes.h b/board/spacemit/k1/tlv_codes.h
new file mode 100644
index 00000000000..e40fbdcee6d
--- /dev/null
+++ b/board/spacemit/k1/tlv_codes.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2025-2026 RISCstar Ltd.
+ */
+
+#ifndef __TLV_CODES_H
+#define __TLV_CODES_H
+
+#define TLV_CODE_SDK_VERSION 0x40
+#define TLV_CODE_DDR_CSNUM 0x41
+#define TLV_CODE_DDR_TYPE 0x42
+#define TLV_CODE_DDR_DATARATE 0x43
+#define TLV_CODE_DDR_TX_ODT 0x44
+
+#define TLV_CODE_WIFI_MAC_ADDR 0x60
+#define TLV_CODE_BLUETOOTH_ADDR 0x61
+
+#define TLV_CODE_PMIC_TYPE 0x80
+#define TLV_CODE_EEPROM_I2C_INDEX 0x81
+#define TLV_CODE_EEPROM_PIN_GROUP 0x82
+
+#endif /* __TLV_CODES_H */
diff --git a/configs/spacemit_k1_defconfig b/configs/spacemit_k1_defconfig
index 23019266103..ce0314686ab 100644
--- a/configs/spacemit_k1_defconfig
+++ b/configs/spacemit_k1_defconfig
@@ -31,8 +31,11 @@ CONFIG_SYS_PBSIZE=276
CONFIG_SPL_MAX_SIZE=0x33000
# CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
CONFIG_SPL_HAVE_INIT_STACK=y
+CONFIG_SPL_I2C=y
CONFIG_SPL_DM_RESET=y
CONFIG_HUSH_PARSER=y
+CONFIG_CMD_TLV_EEPROM=y
+CONFIG_SPL_CMD_TLV_EEPROM=y
CONFIG_OF_UPSTREAM=y
CONFIG_ENV_OVERWRITE=y
CONFIG_SPL_REGMAP=y
@@ -41,6 +44,11 @@ CONFIG_SPL_CLK=y
CONFIG_SPL_CLK_CCF=y
CONFIG_CLK_SPACEMIT=y
CONFIG_CLK_SPACEMIT_K1=y
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_SPACEMIT_K1=y
+CONFIG_MISC=y
+CONFIG_I2C_EEPROM=y
+CONFIG_SPL_I2C_EEPROM=y
CONFIG_PINCTRL=y
CONFIG_PINCTRL_SINGLE=y
CONFIG_DEBUG_UART_NS16550=y
--
2.43.0
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