linux-kernel - [PATCH 3/4] spi: spi-altera-dfl: support n5010 feature revision

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Message-Id: <20210621070621.431482-4-mhu@silicom.dk>
Date:   Mon, 21 Jun 2021 09:06:20 +0200
From:   Martin Hundebøll <mhu@...icom.dk>
To:     Wu Hao <hao.wu@...el.com>, Tom Rix <trix@...hat.com>,
        Moritz Fischer <mdf@...nel.org>, Xu Yilun <yilun.xu@...el.com>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Lee Jones <lee.jones@...aro.org>,
        Mark Brown <broonie@...nel.org>
Cc:     Martin Hundebøll <mhu@...nix.com>,
        linux-fpga@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org, linux-spi@...r.kernel.org,
        Martin Hundebøll <mhu@...icom.dk>
Subject: [PATCH 3/4] spi: spi-altera-dfl: support n5010 feature revision

The Max10 BMC on the Silicom n5010 PAC is slightly different than the
existing BMC's, so use a dedicated feature revision detect it.

Signed-off-by: Martin Hundebøll <mhu@...icom.dk>
---
 drivers/spi/spi-altera-dfl.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-altera-dfl.c b/drivers/spi/spi-altera-dfl.c
index 3e32e4fe5895..d4908db39d87 100644
--- a/drivers/spi/spi-altera-dfl.c
+++ b/drivers/spi/spi-altera-dfl.c
@@ -111,6 +111,13 @@ static struct spi_board_info m10_bmc_info = {
 	.chip_select = 0,
 };
 
+static struct spi_board_info m10_n5010_bmc_info = {
+	.modalias = "m10-n5010",
+	.max_speed_hz = 12500000,
+	.bus_num = 0,
+	.chip_select = 0,
+};
+
 static void config_spi_master(void __iomem *base, struct spi_master *master)
 {
 	u64 v;
@@ -130,6 +137,7 @@ static void config_spi_master(void __iomem *base, struct spi_master *master)
 
 static int dfl_spi_altera_probe(struct dfl_device *dfl_dev)
 {
+	struct spi_board_info *board_info = &m10_bmc_info;
 	struct device *dev = &dfl_dev->dev;
 	struct spi_master *master;
 	struct altera_spi *hw;
@@ -172,9 +180,12 @@ static int dfl_spi_altera_probe(struct dfl_device *dfl_dev)
 		goto exit;
 	}
 
-	if (!spi_new_device(master,  &m10_bmc_info)) {
+	if (dfl_feature_revision(base) == FME_FEATURE_REV_MAX10_SPI_N5010)
+		board_info = &m10_n5010_bmc_info;
+
+	if (!spi_new_device(master, board_info)) {
 		dev_err(dev, "%s failed to create SPI device: %s\n",
-			__func__, m10_bmc_info.modalias);
+			__func__, board_info->modalias);
 	}
 
 	return 0;
-- 
2.31.0