linux-kernel - [PATCH 39/39] mtd: nand: denali_dt: add compatible strings for UniPhier SoC variants

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Message-Id: <1480183585-592-40-git-send-email-yamada.masahiro@socionext.com>
Date:   Sun, 27 Nov 2016 03:06:25 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     linux-mtd@...ts.infradead.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Brian Norris <computersforpeace@...il.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH 39/39] mtd: nand: denali_dt: add compatible strings for UniPhier SoC variants

Add two compatible strings for UniPhier SoCs.  The revision register
on both shows revision 5.0, but they are different hardware.

Features:
 - DMA engine with 64 bit physical address support
 - 1024 byte ECC step size
 - 8 / 16 / 24 bit ECC strength
 - The n_banks format depends on SoC

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 .../devicetree/bindings/mtd/denali-nand.txt        | 10 +++++--
 drivers/mtd/nand/denali_dt.c                       | 33 ++++++++++++++++++++--
 2 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/Documentation/devicetree/bindings/mtd/denali-nand.txt b/Documentation/devicetree/bindings/mtd/denali-nand.txt
index 51fe195..cea46e2 100644
--- a/Documentation/devicetree/bindings/mtd/denali-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/denali-nand.txt
@@ -1,13 +1,19 @@
 * Denali NAND controller
 
 Required properties:
-  - compatible : should be "denali,denali-nand-dt"
+  - compatible : should be one of the following:
+      "denali,denali-nand-dt"
+      "denali,denali-nand-uniphier-v5a"
+      "denali,denali-nand-uniphier-v5b"
   - reg : should contain registers location and length for data and reg.
   - reg-names: Should contain the reg names "nand_data" and "denali_reg"
   - interrupts : The interrupt number.
 
 Optional properties:
-  - nand-ecc-step-size: must be 512 or 1024.  If not specified, default to 512.
+  - nand-ecc-step-size: must be 512 or 1024.  If not specified, default to:
+      512  for "denali,denali-nand-dt"
+      1024 for "denali,denali-nand-uniphier-v5a"
+      1024 for "denali,denali-nand-uniphier-v5b"
     see nand.txt for details.
   - nand-ecc-strength: see nand.txt for details
   - nand-ecc-maximize: see nand.txt for details
diff --git a/drivers/mtd/nand/denali_dt.c b/drivers/mtd/nand/denali_dt.c
index aa1e032..b411889 100644
--- a/drivers/mtd/nand/denali_dt.c
+++ b/drivers/mtd/nand/denali_dt.c
@@ -34,10 +34,37 @@ struct denali_dt_data {
 	unsigned int caps;
 };
 
+static const int denali_uniphier_ecc_strength[] = {
+	24, 16, 8, 0,
+};
+
+static const struct denali_dt_data denali_uniphier_v5a_data = {
+	.ecc_strength_avail = denali_uniphier_ecc_strength,
+	.caps = DENALI_CAPS_DMA_64BIT |
+		DENALI_CAPS_ECC_SIZE_1024,
+};
+
+static const struct denali_dt_data denali_uniphier_v5b_data = {
+	.ecc_strength_avail = denali_uniphier_ecc_strength,
+	.caps = DENALI_CAPS_DMA_64BIT |
+		DENALI_CAPS_NEW_N_BANKS_FORMAT |
+		DENALI_CAPS_ECC_SIZE_1024,
+};
+
 static const struct of_device_id denali_nand_dt_ids[] = {
-		{ .compatible = "denali,denali-nand-dt" },
-		{ /* sentinel */ }
-	};
+	{
+		.compatible = "denali,denali-nand-dt",
+	},
+	{
+		.compatible = "denali,denali-nand-uniphier-v5a",
+		.data = &denali_uniphier_v5a_data,
+	},
+	{
+		.compatible = "denali,denali-nand-uniphier-v5b",
+		.data = &denali_uniphier_v5b_data,
+	},
+	{ /* sentinel */ }
+};
 
 MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
 
-- 
2.7.4