[PATCH 3/4] spi: cadence-xspi: only use readsq/writesq under 64BIT

[Jisheng Zhang <jszhang@kernel.org>]

Currently, cadence-xspi depends on 64BIT. This dependency isn't from
cadence xspi controller itself, but from marvell support code and 64bit
slave dma interface performance optimization.

readsq and writesq are only available under 64BIT. For 32BIT platforms,
we can fallback to ioread32_rep/iowrite32_rep. So we can remove another
reason of the 64BIT dependency.

Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
 drivers/spi/spi-cadence-xspi.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-cadence-xspi.c b/drivers/spi/spi-cadence-xspi.c
index 784619f17b40..39c868a5b171 100644
--- a/drivers/spi/spi-cadence-xspi.c
+++ b/drivers/spi/spi-cadence-xspi.c
@@ -454,18 +454,20 @@ static inline void cdns_xspi_sdma_read(struct cdns_xspi_dev *cdns_xspi, size_t l
 	void *buf = cdns_xspi->in_buffer;
 	size_t offset = 0;
 
-	if (cdns_xspi->dma_data_width == 4) {
+	if (!IS_ENABLED(CONFIG_64BIT) || cdns_xspi->dma_data_width == 4) {
 		if (IS_ALIGNED((uintptr_t)src, 4) && IS_ALIGNED((uintptr_t)buf, 4)) {
 			ioread32_rep(src, buf, len >> 2);
 			offset = len & ~0x3;
 			len -= offset;
 		}
+#ifdef CONFIG_64BIT
 	} else {
 		if (IS_ALIGNED((uintptr_t)src, 8) && IS_ALIGNED((uintptr_t)buf, 8)) {
 			readsq(src, buf, len >> 3);
 			offset = len & ~0x7;
 			len -= offset;
 		}
+#endif
 	}
 	ioread8_rep(src, (u8 *)buf + offset, len);
 }
@@ -476,18 +478,20 @@ static inline void cdns_xspi_sdma_write(struct cdns_xspi_dev *cdns_xspi, size_t
 	const void *buf = cdns_xspi->out_buffer;
 	size_t offset = 0;
 
-	if (cdns_xspi->dma_data_width == 4) {
+	if (!IS_ENABLED(CONFIG_64BIT) || cdns_xspi->dma_data_width == 4) {
 		if (IS_ALIGNED((uintptr_t)dst, 4) && IS_ALIGNED((uintptr_t)buf, 4)) {
 			iowrite32_rep(dst, buf, len >> 2);
 			offset = len & ~0x3;
 			len -= offset;
 		}
+#ifdef CONFIG_64BIT
 	} else {
 		if (IS_ALIGNED((uintptr_t)dst, 8) && IS_ALIGNED((uintptr_t)buf, 8)) {
 			writesq(dst, buf, len >> 3);
 			offset = len & ~0x7;
 			len -= offset;
 		}
+#endif
 	}
 	iowrite8_rep(dst, (const u8 *)buf + offset, len);
 }
-- 
2.53.0