return -1;
}
- reg_ctrl = reg_read(®s->ctrl);
-
- /* Reset spi */
- reg_write(®s->ctrl, (reg_ctrl & ~MXC_CSPICTRL_EN));
- reg_write(®s->ctrl, (reg_ctrl | MXC_CSPICTRL_EN));
+ /*
+ * Reset SPI and set all CSs to master mode, if toggling
+ * between slave and master mode we might see a glitch
+ * on the clock line
+ */
+ reg_ctrl = MXC_CSPICTRL_MODE_MASK;
+ reg_write(®s->ctrl, reg_ctrl);
+ reg_ctrl |= MXC_CSPICTRL_EN;
+ reg_write(®s->ctrl, reg_ctrl);
/*
* The following computation is taken directly from Freescale's code.
reg_ctrl = (reg_ctrl & ~MXC_CSPICTRL_POSTDIV(0x0F)) |
MXC_CSPICTRL_POSTDIV(post_div);
- /* always set to master mode */
- reg_ctrl |= 1 << (cs + 4);
-
/* We need to disable SPI before changing registers */
reg_ctrl &= ~MXC_CSPICTRL_EN;
if (bus >= ARRAY_SIZE(spi_bases))
return NULL;
- mxcs = calloc(sizeof(struct mxc_spi_slave), 1);
+ mxcs = spi_alloc_slave(struct mxc_spi_slave, bus, cs);
if (!mxcs) {
puts("mxc_spi: SPI Slave not allocated !\n");
return NULL;
cs = ret;
- mxcs->slave.bus = bus;
- mxcs->slave.cs = cs;
mxcs->base = spi_bases[bus];
ret = spi_cfg_mxc(mxcs, cs, max_hz, mode);