fix(flash): add W25Q-RV QER 6 support - #19
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Recognizes QER=6 for Winbond W25Q-RV/DTR devices that use JESD216C+ BFPT v1.8+. - Renames QER_RESERVED1 -> QER_BIT1_SR2_35_31 and QER_RESERVED2 -> QER_RESERVED. - Adds SPI_FLASH_SFDP_QUAD_QE_BIT1_SR2_35_31 enum: SR2 read via 0x35, written independently via 0x31. - Updates clear_block_protect, enable_quad_spi and is_quad_spi_enabled accordingly. Based on upstream PR: Azure/Project-Cerberus#19
adiGlick
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Aug 10, 2026
Recognizes QER=6 for Winbond W25Q-RV/DTR devices that use JESD216C+ BFPT v1.8+. - Renames QER_RESERVED1 -> QER_BIT1_SR2_35_31 and QER_RESERVED2 -> QER_RESERVED. - Adds SPI_FLASH_SFDP_QUAD_QE_BIT1_SR2_35_31 enum: SR2 read via 0x35, written independently via 0x31. - Updates clear_block_protect, enable_quad_spi and is_quad_spi_enabled accordingly. Based on upstream PR: Azure/Project-Cerberus#19
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Issue
Winbond W25Q-RV/DTR devices can report SFDP QER 6, which uses QE at SR2 bit 1. SR2 must be read with
35hand written independently with one-byte31h. The existing SFDP path treats QER 6 as unknown, preventing flash initialization.Fix
35h/31hoperations.