[PATCH v10 02/26] mtd: rawnand: sunxi: share the buffer transfer chunk size

[James Hilliard]

Use one helper to determine how many bytes a buffer read or write can
transfer in a single normal command. Keep the existing SRAM-size limit
and command sequencing unchanged.

Signed-off-by: James Hilliard <james.hilliard1 at gmail.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 80006d1a33d6..b75984961699 100644
--- a/drivers/mtd/nand/raw/sunxi_nand.c
+++ b/drivers/mtd/nand/raw/sunxi_nand.c
@@ -659,6 +659,11 @@ static void sunxi_nfc_select_chip(struct nand_chip *nand, unsigned int cs)
 	writel(ctl, nfc->regs + NFC_REG_CTL);
 }
 
+static int sunxi_nfc_buf_chunk_size(struct sunxi_nfc *nfc, int len)
+{
+	return min(len, nfc->caps->sram_size);
+}
+
 static void sunxi_nfc_read_buf(struct nand_chip *nand, uint8_t *buf, int len)
 {
 	struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
@@ -671,7 +676,7 @@ static void sunxi_nfc_read_buf(struct nand_chip *nand, uint8_t *buf, int len)
 	while (len > offs) {
 		bool poll = false;
 
-		cnt = min(len - offs, nfc->caps->sram_size);
+		cnt = sunxi_nfc_buf_chunk_size(nfc, len - offs);
 
 		ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
 		if (ret)
@@ -709,7 +714,7 @@ static void sunxi_nfc_write_buf(struct nand_chip *nand, const uint8_t *buf,
 	while (len > offs) {
 		bool poll = false;
 
-		cnt = min(len - offs, nfc->caps->sram_size);
+		cnt = sunxi_nfc_buf_chunk_size(nfc, len - offs);
 
 		ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
 		if (ret)

-- 
2.53.0