lpc: Add SPI mode support. Use for ADXL375 on easymotor

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/easymotor-v3/ao_pins.h b/src/easymotor-v3/ao_pins.h
index 89d9db0ed09e0b9d81a111656a0d762973bd0094..2db8a4220beecd244f6d6f2ab645bb772cb389e0 100644 (file)
--- a/src/easymotor-v3/ao_pins.h
+++ b/src/easymotor-v3/ao_pins.h
@@ -126,11 +126,13 @@ struct ao_adc {
 /* SPI */
 
 #define HAS_SPI_0              1
+#define SPI_0_MODE             ((0 << LPC_SSP_CR0_CPOL) | (0 << LPC_SSP_CR0_CPHA))
 #define SPI_SCK0_P0_6           1
 #define HAS_SPI_1               1
 #define SPI_SCK1_P1_15          1
 #define SPI_MISO1_P0_22         1
 #define SPI_MOSI1_P0_21         1
+#define SPI_1_MODE             ((1 << LPC_SSP_CR0_CPOL) | (1 << LPC_SSP_CR0_CPHA))
 
 /*
  * SPI Flash memory

diff --git a/src/lpc/ao_spi_lpc.c b/src/lpc/ao_spi_lpc.c
index ec48e95c386eeec40a1f90b936606aa22193fede..010feb63ec3ebc5e2c4c74b165e20dc38a83ad50 100644 (file)
--- a/src/lpc/ao_spi_lpc.c
+++ b/src/lpc/ao_spi_lpc.c
@@ -90,7 +90,7 @@ ao_spi_put(uint8_t id)
 }
 
 static void
-ao_spi_channel_init(uint8_t id)
+ao_spi_channel_init(uint8_t id, uint8_t mode)
 {
        struct lpc_ssp  *lpc_ssp = ao_lpc_ssp[id];
        uint8_t d;
@@ -102,8 +102,7 @@ ao_spi_channel_init(uint8_t id)
 
        lpc_ssp->cr0 = ((LPC_SSP_CR0_DSS_8 << LPC_SSP_CR0_DSS) |
                        (LPC_SSP_CR0_FRF_SPI << LPC_SSP_CR0_FRF) |
-                       (0 << LPC_SSP_CR0_CPOL) |
-                       (0 << LPC_SSP_CR0_CPHA) |
+                       mode |
                        (0 << LPC_SSP_CR0_SCR));
 
        /* Enable the device */
@@ -121,6 +120,9 @@ void
 ao_spi_init(void)
 {
 #if HAS_SPI_0
+#ifndef SPI_0_MODE
+#define SPI_0_MODE     0
+#endif
        /* Configure pins */
 #if SPI_SCK0_P0_6
        lpc_ioconf.pio0_6 = ao_lpc_alternate(LPC_IOCONF_FUNC_PIO0_6_SCK0);
@@ -149,10 +151,13 @@ ao_spi_init(void)
        /* Reset the device */
        lpc_scb.presetctrl &= ~(1UL << LPC_SCB_PRESETCTRL_SSP0_RST_N);
        lpc_scb.presetctrl |= (1 << LPC_SCB_PRESETCTRL_SSP0_RST_N);
-       ao_spi_channel_init(0);
+       ao_spi_channel_init(0, SPI_0_MODE);
 #endif
 
 #if HAS_SPI_1
+#ifndef SPI_1_MODE
+#define SPI_1_MODE     0
+#endif
 
 #if SPI_SCK1_P1_15
        lpc_ioconf.pio1_15 = ao_lpc_alternate(LPC_IOCONF_FUNC_PIO1_15_SCK1);
@@ -199,6 +204,6 @@ ao_spi_init(void)
        /* Reset the device */
        lpc_scb.presetctrl &= ~(1UL << LPC_SCB_PRESETCTRL_SSP1_RST_N);
        lpc_scb.presetctrl |= (1 << LPC_SCB_PRESETCTRL_SSP1_RST_N);
-       ao_spi_channel_init(1);
+       ao_spi_channel_init(1, SPI_1_MODE);
 #endif /* HAS_SPI_1 */
 }