linux-kernel - [PATCH v2 11/15] spi: dw: adjust size of mem

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Date:   Mon, 12 Dec 2022 18:07:28 +0000
From:   Sudip Mukherjee <sudip.mukherjee@...ive.com>
To:     Serge Semin <fancer.lancer@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     jude.onyenegecha@...ive.com, ben.dooks@...ive.com,
        jeegar.lakhani@...ive.com, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sudip Mukherjee <sudip.mukherjee@...ive.com>
Subject: [PATCH v2 11/15] spi: dw: adjust size of mem_op

In enhanced mode adjust the size of the data that can be sent or received
as this will then be used to set the NDF.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@...ive.com>
---
 drivers/spi/spi-dw-core.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index 75f5ce5f377ca..dff7b419af304 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -546,6 +546,13 @@ static void dw_spi_handle_err(struct spi_controller *master,
 	dw_spi_reset_chip(dws);
 }
 
+static int dw_spi_adjust_enh_mem_op_size(struct spi_mem *mem, struct spi_mem_op *op)
+{
+	op->data.nbytes = clamp_val(op->data.nbytes, 0, DW_SPI_NDF_MASK + 1);
+
+	return 0;
+}
+
 static int dw_spi_adjust_mem_op_size(struct spi_mem *mem, struct spi_mem_op *op)
 {
 	if (op->data.dir == SPI_MEM_DATA_IN)
@@ -997,13 +1004,14 @@ static void dw_spi_init_mem_ops(struct dw_spi *dws)
 {
 	if (!dws->mem_ops.exec_op && !(dws->caps & DW_SPI_CAP_CS_OVERRIDE) &&
 	    !dws->set_cs) {
-		dws->mem_ops.adjust_op_size = dw_spi_adjust_mem_op_size;
 		if (dws->caps & DW_SPI_CAP_EMODE) {
 			dws->mem_ops.exec_op = dw_spi_exec_enh_mem_op;
 			dws->mem_ops.supports_op = dw_spi_supports_enh_mem_op;
+			dws->mem_ops.adjust_op_size = dw_spi_adjust_enh_mem_op_size;
 		} else {
 			dws->mem_ops.exec_op = dw_spi_exec_mem_op;
 			dws->mem_ops.supports_op = dw_spi_supports_mem_op;
+			dws->mem_ops.adjust_op_size = dw_spi_adjust_mem_op_size;
 		}
 		if (!dws->max_mem_freq)
 			dws->max_mem_freq = dws->max_freq;
-- 
2.30.2