linux-kernel - [PATCH v2 10/27] spi: mt65xx: Support per spi-mem operation frequency switches

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20241224-winbond-6-11-rc1-quad-support-v2-10-ad218dbc406f@bootlin.com>
Date: Tue, 24 Dec 2024 18:05:55 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Mark Brown <broonie@...nel.org>, Sanjay R Mehta <sanju.mehta@....com>, 
 Serge Semin <fancer.lancer@...il.com>, Han Xu <han.xu@....com>, 
 Conor Dooley <conor.dooley@...rochip.com>, 
 Daire McNamara <daire.mcnamara@...rochip.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Haibo Chen <haibo.chen@....com>, Yogesh Gaur <yogeshgaur.83@...il.com>, 
 Heiko Stuebner <heiko@...ech.de>, Michal Simek <michal.simek@....com>, 
 Miquel Raynal <miquel.raynal@...tlin.com>, 
 Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, 
 Jacky Huang <ychuang3@...oton.com>, Shan-Chun Hung <schung@...oton.com>, 
 Chin-Ting Kuo <chin-ting_kuo@...eedtech.com>, 
 Cédric Le Goater <clg@...d.org>, 
 Joel Stanley <joel@....id.au>, Andrew Jeffery <andrew@...econstruct.com.au>, 
 Avi Fishman <avifishman70@...il.com>, Tomer Maimon <tmaimon77@...il.com>, 
 Tali Perry <tali.perry1@...il.com>, Patrick Venture <venture@...gle.com>, 
 Nancy Yuen <yuenn@...gle.com>, Benjamin Fair <benjaminfair@...gle.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Raju Rangoju <Raju.Rangoju@....com>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Steam Lin <stlin2@...bond.com>, linux-spi@...r.kernel.org, 
 linux-kernel@...r.kernel.org, imx@...ts.linux.dev, 
 linux-riscv@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, 
 linux-mediatek@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 linux-mtd@...ts.infradead.org, linux-aspeed@...ts.ozlabs.org, 
 openbmc@...ts.ozlabs.org, linux-stm32@...md-mailman.stormreply.com
Subject: [PATCH v2 10/27] spi: mt65xx: Support per spi-mem operation
 frequency switches

Every ->exec_op() call correctly configures the spi bus speed to the
maximum allowed frequency for the memory using the constant spi default
parameter. Since we can now have per-operation constraints, let's use
the value that comes from the spi-mem operation structure instead. In
case there is no specific limitation for this operation, the default spi
device value will be given anyway.

The per-operation frequency capability is thus advertised to the spi-mem
core.

Cc: Matthias Brugger <matthias.bgg@...il.com>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---
 drivers/spi/spi-mt65xx.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 85f3bafc975dbc3fd95f77b8dcfc0ca9aac32f5d..197bf2dbe5de7e853ccddf2c90d8bff40202f025 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -961,7 +961,7 @@ static int mtk_spi_mem_exec_op(struct spi_mem *mem,
 
 	mtk_spi_reset(mdata);
 	mtk_spi_hw_init(mem->spi->controller, mem->spi);
-	mtk_spi_prepare_transfer(mem->spi->controller, mem->spi->max_speed_hz);
+	mtk_spi_prepare_transfer(mem->spi->controller, op->max_freq);
 
 	reg_val = readl(mdata->base + SPI_CFG3_IPM_REG);
 	/* opcode byte len */
@@ -1122,6 +1122,10 @@ static const struct spi_controller_mem_ops mtk_spi_mem_ops = {
 	.exec_op = mtk_spi_mem_exec_op,
 };
 
+static const struct spi_controller_mem_caps mtk_spi_mem_caps = {
+	.per_op_freq = true,
+};
+
 static int mtk_spi_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -1160,6 +1164,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
 	if (mdata->dev_comp->ipm_design) {
 		mdata->dev = dev;
 		host->mem_ops = &mtk_spi_mem_ops;
+		host->mem_caps = &mtk_spi_mem_caps;
 		init_completion(&mdata->spimem_done);
 	}
 

-- 
2.47.0