target/linux/mediatek/patches-5.4/999-2363-spi-mediatek-fix-timeout-for-large-data.patch

From 8efe8045522d7bd790b9ae7408c64f497a54e643 Mon Sep 17 00:00:00 2001
From: Sam Shih <sam.shih@mediatek.com>
Date: Fri, 2 Jun 2023 13:06:18 +0800
Subject: [PATCH] 
 [spi-and-storage][999-2363-spi-mediatek-fix-timeout-for-large-data.patch]

---
 drivers/spi/spi-mt65xx.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index dbb471769..871eff03f 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -721,6 +721,23 @@ static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+static int mtk_spi_mem_adjust_op_size(struct spi_mem *mem,
+                                      struct spi_mem_op *op)
+{
+	int opcode_len;
+
+	if(!op->data.nbytes)
+		return 0;
+
+	if (op->data.dir != SPI_MEM_NO_DATA) {
+		opcode_len = 1 + op->addr.nbytes + op->dummy.nbytes;
+		if (opcode_len + op->data.nbytes > MTK_SPI_IPM_PACKET_SIZE)
+			op->data.nbytes = MTK_SPI_IPM_PACKET_SIZE -opcode_len;
+	}
+
+	return 0;
+}
+
 static bool mtk_spi_mem_supports_op(struct spi_mem *mem,
 				     const struct spi_mem_op *op)
 {
@@ -947,6 +964,7 @@ err_exit:
 }
 
 static const struct spi_controller_mem_ops mtk_spi_mem_ops = {
+	.adjust_op_size = mtk_spi_mem_adjust_op_size,
 	.supports_op = mtk_spi_mem_supports_op,
 	.exec_op = mtk_spi_mem_exec_op,
 };
-- 
2.34.1