1 files changed, 34 insertions, 23 deletions

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 5f29fac8669a..1b0c6770c14e 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -870,21 +870,22 @@ static int spi_nor_write_16bit_sr_and_check(struct spi_nor *nor, u8 sr1)
 		ret = spi_nor_read_cr(nor, &sr_cr[1]);
 		if (ret)
 			return ret;
-	} else if (nor->params->quad_enable) {
+	} else if (spi_nor_get_protocol_width(nor->read_proto) == 4 &&
+		   spi_nor_get_protocol_width(nor->write_proto) == 4 &&
+		   nor->params->quad_enable) {
 		/*
 		 * If the Status Register 2 Read command (35h) is not
 		 * supported, we should at least be sure we don't
 		 * change the value of the SR2 Quad Enable bit.
 		 *
-		 * We can safely assume that when the Quad Enable method is
-		 * set, the value of the QE bit is one, as a consequence of the
-		 * nor->params->quad_enable() call.
+		 * When the Quad Enable method is set and the buswidth is 4, we
+		 * can safely assume that the value of the QE bit is one, as a
+		 * consequence of the nor->params->quad_enable() call.
 		 *
-		 * We can safely assume that the Quad Enable bit is present in
-		 * the Status Register 2 at BIT(1). According to the JESD216
-		 * revB standard, BFPT DWORDS[15], bits 22:20, the 16-bit
-		 * Write Status (01h) command is available just for the cases
-		 * in which the QE bit is described in SR2 at BIT(1).
+		 * According to the JESD216 revB standard, BFPT DWORDS[15],
+		 * bits 22:20, the 16-bit Write Status (01h) command is
+		 * available just for the cases in which the QE bit is
+		 * described in SR2 at BIT(1).
 		 */
 		sr_cr[1] = SR2_QUAD_EN_BIT1;
 	} else {
@@ -2844,6 +2845,9 @@ static void spi_nor_init_flags(struct spi_nor *nor)
 	if (of_property_read_bool(np, "broken-flash-reset"))
 		nor->flags |= SNOR_F_BROKEN_RESET;
 
+	if (of_property_read_bool(np, "no-wp"))
+		nor->flags |= SNOR_F_NO_WP;
+
 	if (flags & SPI_NOR_SWP_IS_VOLATILE)
 		nor->flags |= SNOR_F_SWP_IS_VOLATILE;
 
@@ -2897,16 +2901,23 @@ static void spi_nor_init_fixup_flags(struct spi_nor *nor)
  * SFDP standard, or where SFDP tables are not defined at all.
  * Will replace the spi_nor_manufacturer_init_params() method.
  */
-static void spi_nor_late_init_params(struct spi_nor *nor)
+static int spi_nor_late_init_params(struct spi_nor *nor)
 {
 	struct spi_nor_flash_parameter *params = nor->params;
+	int ret;
 
 	if (nor->manufacturer && nor->manufacturer->fixups &&
-	    nor->manufacturer->fixups->late_init)
-		nor->manufacturer->fixups->late_init(nor);
+	    nor->manufacturer->fixups->late_init) {
+		ret = nor->manufacturer->fixups->late_init(nor);
+		if (ret)
+			return ret;
+	}
 
-	if (nor->info->fixups && nor->info->fixups->late_init)
-		nor->info->fixups->late_init(nor);
+	if (nor->info->fixups && nor->info->fixups->late_init) {
+		ret = nor->info->fixups->late_init(nor);
+		if (ret)
+			return ret;
+	}
 
 	/* Default method kept for backward compatibility. */
 	if (!params->set_4byte_addr_mode)
@@ -2924,6 +2935,8 @@ static void spi_nor_late_init_params(struct spi_nor *nor)
 
 	if (nor->info->n_banks > 1)
 		params->bank_size = div64_u64(params->size, nor->info->n_banks);
+
+	return 0;
 }
 
 /**
@@ -3082,22 +3095,20 @@ static int spi_nor_init_params(struct spi_nor *nor)
 		spi_nor_init_params_deprecated(nor);
 	}
 
-	spi_nor_late_init_params(nor);
-
-	return 0;
+	return spi_nor_late_init_params(nor);
 }
 
-/** spi_nor_octal_dtr_enable() - enable Octal DTR I/O if needed
+/** spi_nor_set_octal_dtr() - enable or disable Octal DTR I/O.
  * @nor:                 pointer to a 'struct spi_nor'
  * @enable:              whether to enable or disable Octal DTR
  *
  * Return: 0 on success, -errno otherwise.
  */
-static int spi_nor_octal_dtr_enable(struct spi_nor *nor, bool enable)
+static int spi_nor_set_octal_dtr(struct spi_nor *nor, bool enable)
 {
 	int ret;
 
-	if (!nor->params->octal_dtr_enable)
+	if (!nor->params->set_octal_dtr)
 		return 0;
 
 	if (!(nor->read_proto == SNOR_PROTO_8_8_8_DTR &&
@@ -3107,7 +3118,7 @@ static int spi_nor_octal_dtr_enable(struct spi_nor *nor, bool enable)
 	if (!(nor->flags & SNOR_F_IO_MODE_EN_VOLATILE))
 		return 0;
 
-	ret = nor->params->octal_dtr_enable(nor, enable);
+	ret = nor->params->set_octal_dtr(nor, enable);
 	if (ret)
 		return ret;
 
@@ -3168,7 +3179,7 @@ static int spi_nor_init(struct spi_nor *nor)
 {
 	int err;
 
-	err = spi_nor_octal_dtr_enable(nor, true);
+	err = spi_nor_set_octal_dtr(nor, true);
 	if (err) {
 		dev_dbg(nor->dev, "octal mode not supported\n");
 		return err;
@@ -3270,7 +3281,7 @@ static int spi_nor_suspend(struct mtd_info *mtd)
 	int ret;
 
 	/* Disable octal DTR mode if we enabled it. */
-	ret = spi_nor_octal_dtr_enable(nor, false);
+	ret = spi_nor_set_octal_dtr(nor, false);
 	if (ret)
 		dev_err(nor->dev, "suspend() failed\n");