spi: spi-qpic-snand: use CW_PER_PAGE_MASK bitmask

Change the code to use the already defined CW_PER_PAGE_MASK
bitmask along with the FIELD_PREP() macro instead of using
magic values.

This makes the code more readable. It also syncs the affected
codes with their counterparts in the 'qcom_nandc' driver, so it
makes it easier to spot the differences between the two
implementations.

No functional changes intended.

Signed-off-by: Gabor Juhos <j4g8y7@gmail.com>
Reviewed-by: Md Sadre Alam <quic_mdalam@quicinc.com>
Link: https://patch.msgid.link/20250515-qpic-snand-use-bitmasks-v1-1-11729aeae73b@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: juhosg

drivers/spi/spi-qpic-snand.c

@@ -483,7 +483,8 @@ static int qcom_spi_block_erase(struct qcom_nand_controller *snandc)
 	snandc->regs->cmd = snandc->qspi->cmd;
 	snandc->regs->addr0 = snandc->qspi->addr1;
 	snandc->regs->addr1 = snandc->qspi->addr2;
-	snandc->regs->cfg0 = cpu_to_le32(ecc_cfg->cfg0_raw & ~(7 << CW_PER_PAGE));
+	snandc->regs->cfg0 = cpu_to_le32((ecc_cfg->cfg0_raw & ~CW_PER_PAGE_MASK) |
+					 FIELD_PREP(CW_PER_PAGE_MASK, 0));
 	snandc->regs->cfg1 = cpu_to_le32(ecc_cfg->cfg1_raw);
 	snandc->regs->exec = cpu_to_le32(1);
 
@@ -544,8 +545,8 @@ static int qcom_spi_read_last_cw(struct qcom_nand_controller *snandc,
 	snandc->regs->addr0 = (snandc->qspi->addr1 | cpu_to_le32(col));
 	snandc->regs->addr1 = snandc->qspi->addr2;
 
-	cfg0 = (ecc_cfg->cfg0_raw & ~(7U << CW_PER_PAGE)) |
-		0 << CW_PER_PAGE;
+	cfg0 = (ecc_cfg->cfg0_raw & ~CW_PER_PAGE_MASK) |
+	       FIELD_PREP(CW_PER_PAGE_MASK, 0);
 	cfg1 = ecc_cfg->cfg1_raw;
 	ecc_bch_cfg = ECC_CFG_ECC_DISABLE;
 
@@ -687,8 +688,8 @@ static int qcom_spi_read_cw_raw(struct qcom_nand_controller *snandc, u8 *data_bu
 	qcom_clear_bam_transaction(snandc);
 	raw_cw = num_cw - 1;
 
-	cfg0 = (ecc_cfg->cfg0_raw & ~(7U << CW_PER_PAGE)) |
-				0 << CW_PER_PAGE;
+	cfg0 = (ecc_cfg->cfg0_raw & ~CW_PER_PAGE_MASK) |
+	       FIELD_PREP(CW_PER_PAGE_MASK, 0);
 	cfg1 = ecc_cfg->cfg1_raw;
 	ecc_bch_cfg = ECC_CFG_ECC_DISABLE;
 
@@ -808,8 +809,8 @@ static int qcom_spi_read_page_ecc(struct qcom_nand_controller *snandc,
 	snandc->buf_start = 0;
 	qcom_clear_read_regs(snandc);
 
-	cfg0 = (ecc_cfg->cfg0 & ~(7U << CW_PER_PAGE)) |
-				(num_cw - 1) << CW_PER_PAGE;
+	cfg0 = (ecc_cfg->cfg0 & ~CW_PER_PAGE_MASK) |
+	       FIELD_PREP(CW_PER_PAGE_MASK, num_cw - 1);
 	cfg1 = ecc_cfg->cfg1;
 	ecc_bch_cfg = ecc_cfg->ecc_bch_cfg;
 
@@ -904,8 +905,8 @@ static int qcom_spi_read_page_oob(struct qcom_nand_controller *snandc,
 	qcom_clear_read_regs(snandc);
 	qcom_clear_bam_transaction(snandc);
 
-	cfg0 = (ecc_cfg->cfg0 & ~(7U << CW_PER_PAGE)) |
-				(num_cw - 1) << CW_PER_PAGE;
+	cfg0 = (ecc_cfg->cfg0 & ~CW_PER_PAGE_MASK) |
+	       FIELD_PREP(CW_PER_PAGE_MASK, num_cw - 1);
 	cfg1 = ecc_cfg->cfg1;
 	ecc_bch_cfg = ecc_cfg->ecc_bch_cfg;
 
@@ -1015,8 +1016,8 @@ static int qcom_spi_program_raw(struct qcom_nand_controller *snandc,
 	int num_cw = snandc->qspi->num_cw;
 	u32 cfg0, cfg1, ecc_bch_cfg;
 
-	cfg0 = (ecc_cfg->cfg0_raw & ~(7U << CW_PER_PAGE)) |
-			(num_cw - 1) << CW_PER_PAGE;
+	cfg0 = (ecc_cfg->cfg0_raw & ~CW_PER_PAGE_MASK) |
+	       FIELD_PREP(CW_PER_PAGE_MASK, num_cw - 1);
 	cfg1 = ecc_cfg->cfg1_raw;
 	ecc_bch_cfg = ECC_CFG_ECC_DISABLE;
 
@@ -1098,8 +1099,8 @@ static int qcom_spi_program_ecc(struct qcom_nand_controller *snandc,
 	int num_cw = snandc->qspi->num_cw;
 	u32 cfg0, cfg1, ecc_bch_cfg, ecc_buf_cfg;
 
-	cfg0 = (ecc_cfg->cfg0 & ~(7U << CW_PER_PAGE)) |
-				(num_cw - 1) << CW_PER_PAGE;
+	cfg0 = (ecc_cfg->cfg0 & ~CW_PER_PAGE_MASK) |
+	       FIELD_PREP(CW_PER_PAGE_MASK, num_cw - 1);
 	cfg1 = ecc_cfg->cfg1;
 	ecc_bch_cfg = ecc_cfg->ecc_bch_cfg;
 	ecc_buf_cfg = ecc_cfg->ecc_buf_cfg;
@@ -1175,8 +1176,8 @@ static int qcom_spi_program_oob(struct qcom_nand_controller *snandc,
 	int num_cw = snandc->qspi->num_cw;
 	u32 cfg0, cfg1, ecc_bch_cfg, ecc_buf_cfg;
 
-	cfg0 = (ecc_cfg->cfg0 & ~(7U << CW_PER_PAGE)) |
-				(num_cw - 1) << CW_PER_PAGE;
+	cfg0 = (ecc_cfg->cfg0 & ~CW_PER_PAGE_MASK) |
+	       FIELD_PREP(CW_PER_PAGE_MASK, num_cw - 1);
 	cfg1 = ecc_cfg->cfg1;
 	ecc_bch_cfg = ecc_cfg->ecc_bch_cfg;
 	ecc_buf_cfg = ecc_cfg->ecc_buf_cfg;