linux-kernel - [PATCH v2 2/2] mtd: spi-nor: intel-spi: add support for Intel Cannon Lake SPI flash

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Message-ID: <d62dec18-fed4-7ac5-35c8-25f1be2201a9@fortanix.com>
Date:   Wed, 4 Sep 2019 01:15:24 +0000
From:   Jethro Beekman <jethro@...tanix.com>
To:     Marek Vasut <marek.vasut@...il.com>,
        Tudor Ambarus <tudor.ambarus@...rochip.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Allison Randal <allison@...utok.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jethro Beekman <jethro@...tanix.com>,
        Enrico Weigelt <info@...ux.net>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/2] mtd: spi-nor: intel-spi: add support for Intel Cannon
 Lake SPI flash

Now that SPI flash controllers without a software sequencer are
supported, it's trivial to add support for CNL and its PCI ID.

Values from https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/300-series-chipset-pch-datasheet-vol-2.pdf

Signed-off-by: Jethro Beekman <jethro@...tanix.com>
---
 drivers/mtd/spi-nor/intel-spi-pci.c     |  5 +++++
 drivers/mtd/spi-nor/intel-spi.c         | 11 +++++++++++
 include/linux/platform_data/intel-spi.h |  1 +
 3 files changed, 17 insertions(+)

diff --git a/drivers/mtd/spi-nor/intel-spi-pci.c b/drivers/mtd/spi-nor/intel-spi-pci.c
index b83c4ab6..195a09d 100644
--- a/drivers/mtd/spi-nor/intel-spi-pci.c
+++ b/drivers/mtd/spi-nor/intel-spi-pci.c
@@ -20,6 +20,10 @@ static const struct intel_spi_boardinfo bxt_info = {
 	.type = INTEL_SPI_BXT,
 };
 
+static const struct intel_spi_boardinfo cnl_info = {
+	.type = INTEL_SPI_CNL,
+};
+
 static int intel_spi_pci_probe(struct pci_dev *pdev,
 			       const struct pci_device_id *id)
 {
@@ -67,6 +71,7 @@ static const struct pci_device_id intel_spi_pci_ids[] = {
 	{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
 	{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
 	{ PCI_VDEVICE(INTEL, 0xa224), (unsigned long)&bxt_info },
+	{ PCI_VDEVICE(INTEL, 0xa324), (unsigned long)&cnl_info },
 	{ },
 };
 MODULE_DEVICE_TABLE(pci, intel_spi_pci_ids);
diff --git a/drivers/mtd/spi-nor/intel-spi.c b/drivers/mtd/spi-nor/intel-spi.c
index 195cdca..91b7851 100644
--- a/drivers/mtd/spi-nor/intel-spi.c
+++ b/drivers/mtd/spi-nor/intel-spi.c
@@ -108,6 +108,10 @@
 #define BXT_FREG_NUM			12
 #define BXT_PR_NUM			6
 
+#define CNL_PR				0x84
+#define CNL_FREG_NUM			6
+#define CNL_PR_NUM			5
+
 #define LVSCC				0xc4
 #define UVSCC				0xc8
 #define ERASE_OPCODE_SHIFT		8
@@ -344,6 +348,13 @@ static int intel_spi_init(struct intel_spi *ispi)
 		ispi->erase_64k = true;
 		break;
 
+	case INTEL_SPI_CNL:
+		ispi->sregs = NULL;
+		ispi->pregs = ispi->base + CNL_PR;
+		ispi->nregions = CNL_FREG_NUM;
+		ispi->pr_num = CNL_PR_NUM;
+		break;
+
 	default:
 		return -EINVAL;
 	}
diff --git a/include/linux/platform_data/intel-spi.h b/include/linux/platform_data/intel-spi.h
index ebb4f33..7f53a5c 100644
--- a/include/linux/platform_data/intel-spi.h
+++ b/include/linux/platform_data/intel-spi.h
@@ -13,6 +13,7 @@ enum intel_spi_type {
 	INTEL_SPI_BYT = 1,
 	INTEL_SPI_LPT,
 	INTEL_SPI_BXT,
+	INTEL_SPI_CNL,
 };
 
 /**
-- 
2.7.4