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@@ -2,14 +2,191 @@
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021 SiFive
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+ * Copyright (c) 2021 YADRO
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*
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* Authors:
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* David Abdurachmanov <david.abdurachmanov@sifive.com>
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+ * Nikita Shubin <n.shubin@yadro.com>
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*/
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#include <platform_override.h>
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+#include <libfdt.h>
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+#include <sbi/sbi_error.h>
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+#include <sbi/sbi_system.h>
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+#include <sbi/sbi_console.h>
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#include <sbi_utils/fdt/fdt_helper.h>
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#include <sbi_utils/fdt/fdt_fixup.h>
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+#include <sbi_utils/reset/fdt_reset.h>
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+#include <sbi_utils/i2c/fdt_i2c.h>
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+
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+#define DA9063_REG_PAGE_CON 0x00
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+#define DA9063_REG_CONTROL_A 0x0e
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+#define DA9063_REG_CONTROL_F 0x13
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+#define DA9063_REG_DEVICE_ID 0x81
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+
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+#define DA9063_CONTROL_A_M_POWER1_EN (1 << 6)
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+#define DA9063_CONTROL_A_M_POWER_EN (1 << 5)
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+#define DA9063_CONTROL_A_STANDBY (1 << 3)
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+
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+#define DA9063_CONTROL_F_WAKEUP (1 << 2)
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+#define DA9063_CONTROL_F_SHUTDOWN (1 << 1)
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+
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+#define PMIC_CHIP_ID_DA9063 0x61
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+
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+static struct {
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+ struct i2c_adapter *adapter;
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+ uint32_t reg;
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+} da9063;
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+
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+static int da9063_system_reset_check(u32 type, u32 reason)
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+{
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+ switch (type) {
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+ case SBI_SRST_RESET_TYPE_SHUTDOWN:
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+ return 1;
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+ case SBI_SRST_RESET_TYPE_COLD_REBOOT:
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+ case SBI_SRST_RESET_TYPE_WARM_REBOOT:
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+ return 255;
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+ }
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+
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+ return 0;
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+}
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+
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+static inline int da9063_sanity_check(struct i2c_adapter *adap, uint32_t reg)
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+{
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+ uint8_t val;
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+ int rc = i2c_adapter_reg_write(adap, reg, DA9063_REG_PAGE_CON, 0x02);
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+
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+ if (rc)
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+ return rc;
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+
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+ /* check set page*/
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+ rc = i2c_adapter_reg_read(adap, reg, 0x0, &val);
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+ if (rc)
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+ return rc;
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+
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+ if (val != 0x02)
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+ return SBI_ENODEV;
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+
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+ /* read and check device id */
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+ rc = i2c_adapter_reg_read(adap, reg, DA9063_REG_DEVICE_ID, &val);
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+ if (rc)
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+ return rc;
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+
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+ if (val != PMIC_CHIP_ID_DA9063)
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+ return SBI_ENODEV;
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+
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+ return 0;
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+}
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+
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+static inline int da9063_shutdown(struct i2c_adapter *adap, uint32_t reg)
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+{
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+ int rc = i2c_adapter_reg_write(adap, da9063.reg,
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+ DA9063_REG_PAGE_CON, 0x00);
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+
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+ if (rc)
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+ return rc;
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+
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+ return i2c_adapter_reg_write(adap, da9063.reg,
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+ DA9063_REG_CONTROL_F,
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+ DA9063_CONTROL_F_SHUTDOWN);
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+}
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+
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+static inline int da9063_reset(struct i2c_adapter *adap, uint32_t reg)
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+{
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+ int rc = i2c_adapter_reg_write(adap, da9063.reg,
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+ DA9063_REG_PAGE_CON, 0x00);
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+
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+ if (rc)
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+ return rc;
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+
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+ rc = i2c_adapter_reg_write(adap, da9063.reg,
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+ DA9063_REG_CONTROL_F,
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+ DA9063_CONTROL_F_WAKEUP);
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+ if (rc)
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+ return rc;
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+
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+ return i2c_adapter_reg_write(adap, da9063.reg,
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+ DA9063_REG_CONTROL_A,
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+ DA9063_CONTROL_A_M_POWER1_EN |
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+ DA9063_CONTROL_A_M_POWER_EN |
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+ DA9063_CONTROL_A_STANDBY);
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+}
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+
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+static void da9063_system_reset(u32 type, u32 reason)
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+{
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+ struct i2c_adapter *adap = da9063.adapter;
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+ uint32_t reg = da9063.reg;
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+ int rc;
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+
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+ if (adap) {
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+ /* sanity check */
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+ rc = da9063_sanity_check(adap, reg);
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+ if (rc) {
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+ sbi_printf("%s: chip is not da9063 PMIC\n", __func__);
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+ goto skip_reset;
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+ }
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+
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+ switch (type) {
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+ case SBI_SRST_RESET_TYPE_SHUTDOWN:
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+ da9063_shutdown(adap, reg);
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+ break;
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+ case SBI_SRST_RESET_TYPE_COLD_REBOOT:
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+ case SBI_SRST_RESET_TYPE_WARM_REBOOT:
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+ da9063_reset(adap, reg);
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+ break;
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+ }
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+ }
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+
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+skip_reset:
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+ sbi_hart_hang();
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+}
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+
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+static struct sbi_system_reset_device da9063_reset_i2c = {
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+ .name = "da9063-reset",
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+ .system_reset_check = da9063_system_reset_check,
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+ .system_reset = da9063_system_reset
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+};
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+
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+static int da9063_reset_init(void *fdt, int nodeoff,
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+ const struct fdt_match *match)
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+{
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+ int rc, i2c_bus;
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+ struct i2c_adapter *adapter;
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+ uint64_t addr;
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+
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+ /* we are dlg,da9063 node */
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+ rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &addr, NULL);
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+ if (rc)
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+ return rc;
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+
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+ da9063.reg = addr;
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+
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+ /* find i2c bus parent node */
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+ i2c_bus = fdt_parent_offset(fdt, nodeoff);
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+ if (i2c_bus < 0)
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+ return i2c_bus;
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+
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+ /* i2c adapter get */
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+ rc = fdt_i2c_adapter_get(fdt, i2c_bus, &adapter);
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+ if (rc)
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+ return rc;
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+
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+ da9063.adapter = adapter;
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+
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+ sbi_system_reset_add_device(&da9063_reset_i2c);
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+
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+ return 0;
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+}
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+
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+static const struct fdt_match da9063_reset_match[] = {
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+ { .compatible = "dlg,da9063", .data = (void *)TRUE },
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+ { },
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+};
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+
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+struct fdt_reset fdt_reset_da9063 = {
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+ .match_table = da9063_reset_match,
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+ .init = da9063_reset_init,
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+};
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static u64 sifive_fu740_tlbr_flush_limit(const struct fdt_match *match)
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{
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@@ -23,6 +200,22 @@ static u64 sifive_fu740_tlbr_flush_limit(const struct fdt_match *match)
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return 0;
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}
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+static int sifive_fu740_final_init(bool cold_boot,
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+ const struct fdt_match *match)
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+{
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+ int rc;
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+ void *fdt = fdt_get_address();
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+
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+ if (cold_boot) {
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+ rc = fdt_reset_driver_init(fdt, &fdt_reset_da9063);
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+ if (rc)
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+ sbi_printf("%s: failed to find da9063 for reset\n",
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+ __func__);
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+ }
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+
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+ return 0;
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+}
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+
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static const struct fdt_match sifive_fu740_match[] = {
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{ .compatible = "sifive,fu740" },
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{ .compatible = "sifive,fu740-c000" },
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@@ -33,4 +226,5 @@ static const struct fdt_match sifive_fu740_match[] = {
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const struct platform_override sifive_fu740 = {
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.match_table = sifive_fu740_match,
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.tlbr_flush_limit = sifive_fu740_tlbr_flush_limit,
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+ .final_init = sifive_fu740_final_init,
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};
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