diff options
Diffstat (limited to 'drivers/spi/kirkwood_spi.c')
| -rw-r--r-- | drivers/spi/kirkwood_spi.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c index 942a208c2c..3d58bcc1b9 100644 --- a/drivers/spi/kirkwood_spi.c +++ b/drivers/spi/kirkwood_spi.c @@ -18,7 +18,7 @@ static struct kwspi_registers *spireg = (struct kwspi_registers *)KW_SPI_BASE; -u32 cs_spi_mpp_back[2]; +static u32 cs_spi_mpp_back[2]; struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, unsigned int max_hz, unsigned int mode) @@ -37,7 +37,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, if (!slave) return NULL; - writel(~KWSPI_CSN_ACT | KWSPI_SMEMRDY, &spireg->ctrl); + writel(KWSPI_SMEMRDY, &spireg->ctrl); /* calculate spi clock prescaller using max_hz */ data = ((CONFIG_SYS_TCLK / 2) / max_hz) + 0x10; @@ -46,7 +46,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, /* program spi clock prescaller using max_hz */ writel(KWSPI_ADRLEN_3BYTE | data, &spireg->cfg); - debug("data = 0x%08x \n", data); + debug("data = 0x%08x\n", data); writel(KWSPI_SMEMRDIRQ, &spireg->irq_cause); writel(KWSPI_IRQMASK, &spireg->irq_mask); @@ -100,7 +100,6 @@ int spi_claim_bus(struct spi_slave *slave) /* set new spi mpp and save current mpp config */ kirkwood_mpp_conf(spi_mpp_config, spi_mpp_backup); - #endif return board_spi_claim_bus(slave); @@ -127,7 +126,7 @@ void spi_release_bus(struct spi_slave *slave) */ int spi_cs_is_valid(unsigned int bus, unsigned int cs) { - return (bus == 0 && (cs == 0 || cs == 1)); + return bus == 0 && (cs == 0 || cs == 1); } #endif @@ -137,12 +136,12 @@ void spi_init(void) void spi_cs_activate(struct spi_slave *slave) { - writel(readl(&spireg->ctrl) | KWSPI_IRQUNMASK, &spireg->ctrl); + setbits_le32(&spireg->ctrl, KWSPI_CSN_ACT); } void spi_cs_deactivate(struct spi_slave *slave) { - writel(readl(&spireg->ctrl) & KWSPI_IRQMASK, &spireg->ctrl); + clrbits_le32(&spireg->ctrl, KWSPI_CSN_ACT); } int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, @@ -161,8 +160,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, * handle data in 8-bit chunks * TBD: 2byte xfer mode to be enabled */ - writel(((readl(&spireg->cfg) & ~KWSPI_XFERLEN_MASK) | - KWSPI_XFERLEN_1BYTE), &spireg->cfg); + clrsetbits_le32(&spireg->cfg, KWSPI_XFERLEN_MASK, KWSPI_XFERLEN_1BYTE); while (bitlen > 4) { debug("loopstart bitlen %d\n", bitlen); @@ -170,9 +168,9 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, /* Shift data so it's msb-justified */ if (dout) - tmpdout = *(u32 *) dout & 0x0ff; + tmpdout = *(u32 *)dout & 0xff; - writel(~KWSPI_SMEMRDIRQ, &spireg->irq_cause); + clrbits_le32(&spireg->irq_cause, KWSPI_SMEMRDIRQ); writel(tmpdout, &spireg->dout); /* Write the data out */ debug("*** spi_xfer: ... %08x written, bitlen %d\n", tmpdout, bitlen); @@ -186,12 +184,11 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, if (readl(&spireg->irq_cause) & KWSPI_SMEMRDIRQ) { isread = 1; tmpdin = readl(&spireg->din); - debug - ("spi_xfer: din %p..%08x read\n", - din, tmpdin); + debug("spi_xfer: din %p..%08x read\n", + din, tmpdin); if (din) { - *((u8 *) din) = (u8) tmpdin; + *((u8 *)din) = (u8)tmpdin; din += 1; } if (dout) |