linux-kernel - [PATCH 2/9] spi: spi_amd: Enable dual and quad I/O modes

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: <20240918105037.406003-3-Raju.Rangoju@amd.com>
Date: Wed, 18 Sep 2024 16:20:30 +0530
From: Raju Rangoju <Raju.Rangoju@....com>
To: <broonie@...nel.org>, <linux-spi@...r.kernel.org>
CC: <linux-kernel@...r.kernel.org>, <sanju.mehta@....com>,
	<krishnamoorthi.m@....com>, <akshata.mukundshetty@....com>,
	<Raju.Rangoju@....com>
Subject: [PATCH 2/9] spi: spi_amd: Enable dual and quad I/O modes

The current spi_amd driver only supports single I/O mode, despite the AMD
SPI controller's capability for dual and quad I/O modes.  So, add support
to enable dual and quad I/O modes.

Co-developed-by: Krishnamoorthi M <krishnamoorthi.m@....com>
Signed-off-by: Krishnamoorthi M <krishnamoorthi.m@....com>
Co-developed-by: Akshata MukundShetty <akshata.mukundshetty@....com>
Signed-off-by: Akshata MukundShetty <akshata.mukundshetty@....com>
Signed-off-by: Raju Rangoju <Raju.Rangoju@....com>
---
 drivers/spi/spi-amd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-amd.c b/drivers/spi/spi-amd.c
index c52066360dfe..54b5a4d18691 100644
--- a/drivers/spi/spi-amd.c
+++ b/drivers/spi/spi-amd.c
@@ -364,8 +364,8 @@ static bool amd_spi_supports_op(struct spi_mem *mem,
 				const struct spi_mem_op *op)
 {
 	/* bus width is number of IO lines used to transmit */
-	if (op->cmd.buswidth > 1 || op->addr.buswidth > 1 ||
-	    op->data.buswidth > 1 || op->data.nbytes > AMD_SPI_MAX_DATA)
+	if (op->cmd.buswidth > 1 || op->addr.buswidth > 4 ||
+	    op->data.buswidth > 4 || op->data.nbytes > AMD_SPI_MAX_DATA)
 		return false;
 
 	return spi_mem_default_supports_op(mem, op);
@@ -514,7 +514,7 @@ static int amd_spi_probe(struct platform_device *pdev)
 	/* Initialize the spi_controller fields */
 	host->bus_num = 0;
 	host->num_chipselect = 4;
-	host->mode_bits = 0;
+	host->mode_bits = SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD;
 	host->flags = SPI_CONTROLLER_HALF_DUPLEX;
 	host->max_speed_hz = AMD_SPI_MAX_HZ;
 	host->min_speed_hz = AMD_SPI_MIN_HZ;
-- 
2.34.1