Merge branch 'bugfix/flash_1v8_enable_vddsdio_reg' into 'master'
bootloader: Only apply VDDSDIO 1.8V->1.9V if regulator is enabled See merge request !1601
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commit
85fc06e3bb
2 changed files with 5 additions and 4 deletions
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@ -44,14 +44,16 @@ config BOOTLOADER_SPI_WP_PIN
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The default value (GPIO 7) is correct for WP pin on ESP32-D2WD integrated flash.
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config BOOTLOADER_VDDSDIO_BOOST
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bool "Increase VDDSDIO LDO voltage to 1.9V"
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bool "Increase VDDSDIO 1.8V LDO voltage to 1.9V"
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default y
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help
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If this option is enabled, and VDDSDIO LDO is set to 1.8V (using EFUSE
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or MTDI bootstrapping pin), bootloader will change LDO settings to
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output 1.9V instead. This helps prevent flash chip from browning out
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during flash programming operations.
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For 3.3V flash, this option has no effect.
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This option has no effect if VDDSDIO is set to 3.3V, or if the internal
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VDDSDIO regulator is disabled via efuse.
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endmenu # Bootloader
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@ -745,12 +745,11 @@ static void vddsdio_configure()
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{
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#if CONFIG_BOOTLOADER_VDDSDIO_BOOST
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rtc_vddsdio_config_t cfg = rtc_vddsdio_get_config();
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if (cfg.tieh == 0) { // 1.8V is used
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if (cfg.enable == 1 && cfg.tieh == 0) { // VDDSDIO regulator is enabled @ 1.8V
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cfg.drefh = 3;
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cfg.drefm = 3;
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cfg.drefl = 3;
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cfg.force = 1;
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cfg.enable = 1;
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rtc_vddsdio_set_config(cfg);
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ets_delay_us(10); // wait for regulator to become stable
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}
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