From: Biju Das <biju.das.jz@bp.renesas.com> To: Mark Brown <broonie@kernel.org>, Miquel Raynal <miquel.raynal@bootlin.com>, Michael Walle <michael@walle.cc>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Cc: Biju Das <biju.das.jz@bp.renesas.com>, linux-spi@vger.kernel.org, linux-mtd@lists.infradead.org, Geert Uytterhoeven <geert+renesas@glider.be>, Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>, Biju Das <biju.das.au@gmail.com>, linux-renesas-soc@vger.kernel.org Subject: [PATCH RFC 0/4] Add set_iofv() callback Date: Wed, 8 Nov 2023 17:11:45 +0000 [thread overview] Message-ID: <20231108171149.258656-1-biju.das.jz@bp.renesas.com> (raw) As per section 8.14 on the AT25QL128A hardware manual[1], IO0..IO3 must be set to Hi-Z state for this flash for fast read quad IO. Snippet from HW manual section 8.14: The upper nibble of the Mode(M7-4) controls the length of the next FAST Read Quad IO instruction through the inclusion or exclusion of the first byte instruction code. The lower nibble bits of the Mode(M3-0) are don't care. However, the IO pins must be high-impedance before the falling edge of the first data out clock. Add set_iofv() callback for configuring IO fixed values to control the pin state. [1] https://www.renesas.com/eu/en/document/dst/at25ql128a-datasheet?r=1608586 Ref: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20230830145835.296690-1-biju.das.jz@bp.renesas.com/ Biju Das (4): spi: spi-mem: Add set_iofv() callback mtd: spi-nor: Add post_sfdp() callback memory: renesas-rpc-if: Add support for overriding IO fixed values spi: rpc-if: Add set_iofv() callback drivers/memory/renesas-rpc-if.c | 20 ++++++++++++++++++++ drivers/mtd/spi-nor/core.c | 20 ++++++++++++++++++++ drivers/spi/spi-mem.c | 20 ++++++++++++++++++++ drivers/spi/spi-rpc-if.c | 9 +++++++++ include/linux/spi/spi-mem.h | 4 ++++ include/memory/renesas-rpc-if.h | 1 + 6 files changed, 74 insertions(+) -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Biju Das <biju.das.jz@bp.renesas.com> To: Mark Brown <broonie@kernel.org>, Miquel Raynal <miquel.raynal@bootlin.com>, Michael Walle <michael@walle.cc>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Cc: Biju Das <biju.das.jz@bp.renesas.com>, linux-spi@vger.kernel.org, linux-mtd@lists.infradead.org, Geert Uytterhoeven <geert+renesas@glider.be>, Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>, Biju Das <biju.das.au@gmail.com>, linux-renesas-soc@vger.kernel.org Subject: [PATCH RFC 0/4] Add set_iofv() callback Date: Wed, 8 Nov 2023 17:11:45 +0000 [thread overview] Message-ID: <20231108171149.258656-1-biju.das.jz@bp.renesas.com> (raw) As per section 8.14 on the AT25QL128A hardware manual[1], IO0..IO3 must be set to Hi-Z state for this flash for fast read quad IO. Snippet from HW manual section 8.14: The upper nibble of the Mode(M7-4) controls the length of the next FAST Read Quad IO instruction through the inclusion or exclusion of the first byte instruction code. The lower nibble bits of the Mode(M3-0) are don't care. However, the IO pins must be high-impedance before the falling edge of the first data out clock. Add set_iofv() callback for configuring IO fixed values to control the pin state. [1] https://www.renesas.com/eu/en/document/dst/at25ql128a-datasheet?r=1608586 Ref: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20230830145835.296690-1-biju.das.jz@bp.renesas.com/ Biju Das (4): spi: spi-mem: Add set_iofv() callback mtd: spi-nor: Add post_sfdp() callback memory: renesas-rpc-if: Add support for overriding IO fixed values spi: rpc-if: Add set_iofv() callback drivers/memory/renesas-rpc-if.c | 20 ++++++++++++++++++++ drivers/mtd/spi-nor/core.c | 20 ++++++++++++++++++++ drivers/spi/spi-mem.c | 20 ++++++++++++++++++++ drivers/spi/spi-rpc-if.c | 9 +++++++++ include/linux/spi/spi-mem.h | 4 ++++ include/memory/renesas-rpc-if.h | 1 + 6 files changed, 74 insertions(+) -- 2.25.1 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/
next reply other threads:[~2023-11-08 17:11 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-11-08 17:11 Biju Das [this message] 2023-11-08 17:11 ` [PATCH RFC 0/4] Add set_iofv() callback Biju Das 2023-11-08 17:11 ` [PATCH RFC 1/4] spi: spi-mem: " Biju Das 2023-11-08 17:11 ` Biju Das 2023-11-09 7:56 ` Geert Uytterhoeven 2023-11-09 7:56 ` Geert Uytterhoeven 2023-11-09 8:28 ` Biju Das 2023-11-08 17:11 ` [PATCH RFC 2/4] mtd: spi-nor: Add post_sfdp() callback Biju Das 2023-11-08 17:11 ` Biju Das 2023-11-08 17:11 ` [PATCH RFC 3/4] memory: renesas-rpc-if: Add support for overriding IO fixed values Biju Das 2023-11-21 9:08 ` Krzysztof Kozlowski 2023-11-08 17:11 ` [PATCH RFC 4/4] spi: rpc-if: Add set_iofv() callback Biju Das 2023-11-09 9:01 ` [PATCH RFC 0/4] " Michael Walle 2023-11-09 9:01 ` Michael Walle 2023-11-09 10:04 ` Biju Das 2023-11-09 10:48 ` Michael Walle 2023-11-09 10:48 ` Michael Walle 2023-11-09 11:48 ` Biju Das 2023-11-09 12:40 ` Michael Walle 2023-11-09 12:40 ` Michael Walle 2023-11-09 18:02 ` Biju Das 2023-11-10 10:11 ` Michael Walle 2023-11-10 10:11 ` Michael Walle 2023-11-10 11:35 ` Biju Das 2023-11-11 12:26 ` Biju Das 2023-11-11 13:08 ` Biju Das 2023-11-13 14:04 ` Michael Walle 2023-11-13 14:04 ` Michael Walle 2023-11-13 14:27 ` Biju Das 2023-11-13 14:48 ` Michael Walle 2023-11-13 14:48 ` Michael Walle 2023-11-13 14:59 ` Biju Das 2023-11-13 15:10 ` Michael Walle 2023-11-13 15:10 ` Michael Walle 2023-11-13 15:55 ` Biju Das 2023-11-14 10:05 ` Michael Walle 2023-11-14 10:05 ` Michael Walle 2023-11-12 20:24 ` Biju Das 2023-11-13 14:37 ` Michael Walle 2023-11-13 14:37 ` Michael Walle 2023-11-13 14:47 ` Michael Walle 2023-11-13 14:47 ` Michael Walle
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