linux-kernel - [PATCH v2 09/15] mtd: rawnand: sunxi: introduce reg_pat_id in sunxi_nfc

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Message-ID: <20251013152645.1119308-10-richard.genoud@bootlin.com>
Date: Mon, 13 Oct 2025 17:26:39 +0200
From: Richard Genoud <richard.genoud@...tlin.com>
To: Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>
Cc: Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	Wentao Liang <vulab@...as.ac.cn>,
	Johan Hovold <johan@...nel.org>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	linux-mtd@...ts.infradead.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Richard Genoud <richard.genoud@...tlin.com>
Subject: [PATCH v2 09/15] mtd: rawnand: sunxi: introduce reg_pat_id in sunxi_nfc_caps

The H6/H616 pattern ID register is not at the same offset as the
A10/A23 one, so move its offset into sunxi_nfc_caps.

No functional change.

Signed-off-by: Richard Genoud <richard.genoud@...tlin.com>
---
 drivers/mtd/nand/raw/sunxi_nand.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/raw/sunxi_nand.c b/drivers/mtd/nand/raw/sunxi_nand.c
index 3ccb7ea7cf17..e8c08f0139d2 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -55,7 +55,8 @@
 #define NFC_REG_A10_USER_DATA	0x0050
 #define NFC_REG_USER_DATA(nfc, x)	(nfc->caps->reg_user_data + ((x) * 4))
 #define NFC_REG_SPARE_AREA	0x00A0
-#define NFC_REG_PAT_ID		0x00A4
+#define NFC_REG_PAT_ID(nfc) (nfc->caps->reg_pat_id)
+#define NFC_REG_A10_PAT_ID	0x00A4
 #define NFC_REG_MDMA_ADDR	0x00C0
 #define NFC_REG_MDMA_CNT	0x00C4
 #define NFC_RAM0_BASE		0x0400
@@ -227,6 +228,7 @@ static inline struct sunxi_nand_chip *to_sunxi_nand(struct nand_chip *nand)
  * @reg_io_data:	I/O data register
  * @reg_ecc_err_cnt:	ECC error counter register
  * @reg_user_data:	User data register
+ * @reg_pat_id:		Pattern ID Register
  * @reg_pat_found:	Data Pattern Status Register
  * @random_en_mask:	RANDOM_EN mask in NFC_ECC_CTL register
  * @random_dir_mask:	RANDOM_DIRECTION mask in NFC_ECC_CTL register
@@ -242,6 +244,7 @@ struct sunxi_nfc_caps {
 	unsigned int reg_io_data;
 	unsigned int reg_ecc_err_cnt;
 	unsigned int reg_user_data;
+	unsigned int reg_pat_id;
 	unsigned int reg_pat_found;
 	unsigned int random_en_mask;
 	unsigned int random_dir_mask;
@@ -803,7 +806,7 @@ static int sunxi_nfc_hw_ecc_correct(struct nand_chip *nand, u8 *data, u8 *oob,
 	if (pattern_found & BIT(step)) {
 		u8 pattern;
 
-		if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID) & 0x1))) {
+		if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID(nfc)) & 0x1))) {
 			pattern = 0x0;
 		} else {
 			pattern = 0xff;
@@ -2223,6 +2226,7 @@ static const struct sunxi_nfc_caps sunxi_nfc_a10_caps = {
 	.reg_io_data = NFC_REG_A10_IO_DATA,
 	.reg_ecc_err_cnt = NFC_REG_A10_ECC_ERR_CNT,
 	.reg_user_data = NFC_REG_A10_USER_DATA,
+	.reg_pat_id = NFC_REG_A10_PAT_ID,
 	.reg_pat_found = NFC_REG_ECC_ST,
 	.random_en_mask = BIT(9),
 	.random_dir_mask = BIT(10),
@@ -2239,6 +2243,7 @@ static const struct sunxi_nfc_caps sunxi_nfc_a23_caps = {
 	.reg_io_data = NFC_REG_A23_IO_DATA,
 	.reg_ecc_err_cnt = NFC_REG_A10_ECC_ERR_CNT,
 	.reg_user_data = NFC_REG_A10_USER_DATA,
+	.reg_pat_id = NFC_REG_A10_PAT_ID,
 	.reg_pat_found = NFC_REG_ECC_ST,
 	.random_en_mask = BIT(9),
 	.random_dir_mask = BIT(10),