spi/pxa2xx: Consider CE4100's FIFO depth

For PXA the default threshold is FIFO_DEPTH / 2. Adjust this value for
CE4100.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>

1 files changed, 26 insertions, 6 deletions

diff --git a/include/linux/pxa2xx_ssp.h b/include/linux/pxa2xx_ssp.h
index 84465d4a51b7..c3aa334cbb9b 100644
--- a/include/linux/pxa2xx_ssp.h
+++ b/include/linux/pxa2xx_ssp.h
@@ -71,10 +71,6 @@
 #define SSCR1_SPO       (1 << 3)        /* Motorola SPI SSPSCLK polarity setting */
 #define SSCR1_SPH       (1 << 4)        /* Motorola SPI SSPSCLK phase setting */
 #define SSCR1_MWDS      (1 << 5)        /* Microwire Transmit Data Size */
-#define SSCR1_TFT       (0x000003c0)    /* Transmit FIFO Threshold (mask) */
-#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */
-#define SSCR1_RFT       (0x00003c00)    /* Receive FIFO Threshold (mask) */
-#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */
 
 #define SSSR_TNF        (1 << 2)        /* Transmit FIFO Not Full */
 #define SSSR_RNE        (1 << 3)        /* Receive FIFO Not Empty */
@@ -82,8 +78,32 @@
 #define SSSR_TFS        (1 << 5)        /* Transmit FIFO Service Request */
 #define SSSR_RFS        (1 << 6)        /* Receive FIFO Service Request */
 #define SSSR_ROR        (1 << 7)        /* Receive FIFO Overrun */
-#define SSSR_TFL_MASK   (0xf << 8)      /* Transmit FIFO Level mask */
-#define SSSR_RFL_MASK   (0xf << 12)     /* Receive FIFO Level mask */
+
+#ifdef CONFIG_ARCH_PXA
+#define RX_THRESH_DFLT  8
+#define TX_THRESH_DFLT  8
+
+#define SSSR_TFL_MASK   (0xf << 8)      /* Transmit FIFO Level mask */
+#define SSSR_RFL_MASK   (0xf << 12)     /* Receive FIFO Level mask */
+
+#define SSCR1_TFT       (0x000003c0)    /* Transmit FIFO Threshold (mask) */
+#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */
+#define SSCR1_RFT       (0x00003c00)    /* Receive FIFO Threshold (mask) */
+#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */
+
+#else
+
+#define RX_THRESH_DFLT  2
+#define TX_THRESH_DFLT  2
+
+#define SSSR_TFL_MASK   (0x3 << 8)      /* Transmit FIFO Level mask */
+#define SSSR_RFL_MASK   (0x3 << 12)     /* Receive FIFO Level mask */
+
+#define SSCR1_TFT       (0x000000c0)    /* Transmit FIFO Threshold (mask) */
+#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..4] */
+#define SSCR1_RFT       (0x00000c00)    /* Receive FIFO Threshold (mask) */
+#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..4] */
+#endif
 
 /* extra bits in PXA255, PXA26x and PXA27x SSP ports */
 #define SSCR0_TISSP             (1 << 4)        /* TI Sync Serial Protocol */