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spi/imx: merge type SPI_IMX_VER_0_7 into SPI_IMX_VER_0_4
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The only difference between SPI_IMX_VER_0_7 and SPI_IMX_VER_0_4 is
.config function.  The patch uses cpu_is_mx35 (to be removed) as the
temporary solution to consolidate functions spi_imx0_4_config and
spi_imx0_7_config into mx31_config.  As a result, type SPI_IMX_VER_0_7
can be merged into SPI_IMX_VER_0_4.

It also renames function spi_imx0_4_reset to mx31_reset to keep
consistency with other function naming.

A couple of redundant macros, MX3_CSPISTAT and MX3_CSPISTAT_RR,
together with the useless type SPI_IMX_VER_0_5 also get cleaned up.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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Shawn Guo authored and Grant Likely committed Jul 14, 2011
1 parent 66de757 commit 2a64a90
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Showing 2 changed files with 19 additions and 56 deletions.
5 changes: 1 addition & 4 deletions drivers/spi/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -161,10 +161,7 @@ config SPI_IMX_VER_0_0
def_bool y if SOC_IMX21 || SOC_IMX27

config SPI_IMX_VER_0_4
def_bool y if SOC_IMX31

config SPI_IMX_VER_0_7
def_bool y if ARCH_MX25 || SOC_IMX35 || SOC_IMX51 || SOC_IMX53
def_bool y if ARCH_MX25 || SOC_IMX31 || SOC_IMX35 || SOC_IMX51 || SOC_IMX53

config SPI_IMX_VER_2_3
def_bool y if SOC_IMX51 || SOC_IMX53
Expand Down
70 changes: 18 additions & 52 deletions drivers/spi/spi-imx.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -45,9 +45,6 @@
#define MXC_CSPIINT 0x0c
#define MXC_RESET 0x1c

#define MX3_CSPISTAT 0x14
#define MX3_CSPISTAT_RR (1 << 3)

/* generic defines to abstract from the different register layouts */
#define MXC_INT_RR (1 << 0) /* Receive data ready interrupt */
#define MXC_INT_TE (1 << 1) /* Transmit FIFO empty interrupt */
Expand All @@ -63,8 +60,6 @@ enum spi_imx_devtype {
SPI_IMX_VER_IMX1,
SPI_IMX_VER_0_0,
SPI_IMX_VER_0_4,
SPI_IMX_VER_0_5,
SPI_IMX_VER_0_7,
SPI_IMX_VER_2_3,
};

Expand Down Expand Up @@ -343,32 +338,7 @@ static void __maybe_unused mx31_trigger(struct spi_imx_data *spi_imx)
writel(reg, spi_imx->base + MXC_CSPICTRL);
}

static int __maybe_unused spi_imx0_4_config(struct spi_imx_data *spi_imx,
struct spi_imx_config *config)
{
unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
int cs = spi_imx->chipselect[config->cs];

reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) <<
MX31_CSPICTRL_DR_SHIFT;

reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT;

if (config->mode & SPI_CPHA)
reg |= MX31_CSPICTRL_PHA;
if (config->mode & SPI_CPOL)
reg |= MX31_CSPICTRL_POL;
if (config->mode & SPI_CS_HIGH)
reg |= MX31_CSPICTRL_SSPOL;
if (cs < 0)
reg |= (cs + 32) << MX31_CSPICTRL_CS_SHIFT;

writel(reg, spi_imx->base + MXC_CSPICTRL);

return 0;
}

static int __maybe_unused spi_imx0_7_config(struct spi_imx_data *spi_imx,
static int __maybe_unused mx31_config(struct spi_imx_data *spi_imx,
struct spi_imx_config *config)
{
unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
Expand All @@ -377,8 +347,12 @@ static int __maybe_unused spi_imx0_7_config(struct spi_imx_data *spi_imx,
reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) <<
MX31_CSPICTRL_DR_SHIFT;

reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT;
reg |= MX31_CSPICTRL_SSCTL;
if (cpu_is_mx35()) {
reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT;
reg |= MX31_CSPICTRL_SSCTL;
} else {
reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT;
}

if (config->mode & SPI_CPHA)
reg |= MX31_CSPICTRL_PHA;
Expand All @@ -387,7 +361,9 @@ static int __maybe_unused spi_imx0_7_config(struct spi_imx_data *spi_imx,
if (config->mode & SPI_CS_HIGH)
reg |= MX31_CSPICTRL_SSPOL;
if (cs < 0)
reg |= (cs + 32) << MX35_CSPICTRL_CS_SHIFT;
reg |= (cs + 32) <<
(cpu_is_mx35() ? MX35_CSPICTRL_CS_SHIFT :
MX31_CSPICTRL_CS_SHIFT);

writel(reg, spi_imx->base + MXC_CSPICTRL);

Expand All @@ -399,10 +375,10 @@ static int __maybe_unused mx31_rx_available(struct spi_imx_data *spi_imx)
return readl(spi_imx->base + MX31_CSPISTATUS) & MX31_STATUS_RR;
}

static void __maybe_unused spi_imx0_4_reset(struct spi_imx_data *spi_imx)
static void __maybe_unused mx31_reset(struct spi_imx_data *spi_imx)
{
/* drain receive buffer */
while (readl(spi_imx->base + MX3_CSPISTAT) & MX3_CSPISTAT_RR)
while (readl(spi_imx->base + MX31_CSPISTATUS) & MX31_STATUS_RR)
readl(spi_imx->base + MXC_CSPIRXDATA);
}

Expand Down Expand Up @@ -563,20 +539,10 @@ static struct spi_imx_devtype_data spi_imx_devtype_data[] = {
#ifdef CONFIG_SPI_IMX_VER_0_4
[SPI_IMX_VER_0_4] = {
.intctrl = mx31_intctrl,
.config = spi_imx0_4_config,
.config = mx31_config,
.trigger = mx31_trigger,
.rx_available = mx31_rx_available,
.reset = spi_imx0_4_reset,
.fifosize = 8,
},
#endif
#ifdef CONFIG_SPI_IMX_VER_0_7
[SPI_IMX_VER_0_7] = {
.intctrl = mx31_intctrl,
.config = spi_imx0_7_config,
.trigger = mx31_trigger,
.rx_available = mx31_rx_available,
.reset = spi_imx0_4_reset,
.reset = mx31_reset,
.fifosize = 8,
},
#endif
Expand Down Expand Up @@ -732,7 +698,7 @@ static struct platform_device_id spi_imx_devtype[] = {
.driver_data = SPI_IMX_VER_0_0,
}, {
.name = "imx25-cspi",
.driver_data = SPI_IMX_VER_0_7,
.driver_data = SPI_IMX_VER_0_4,
}, {
.name = "imx27-cspi",
.driver_data = SPI_IMX_VER_0_0,
Expand All @@ -741,16 +707,16 @@ static struct platform_device_id spi_imx_devtype[] = {
.driver_data = SPI_IMX_VER_0_4,
}, {
.name = "imx35-cspi",
.driver_data = SPI_IMX_VER_0_7,
.driver_data = SPI_IMX_VER_0_4,
}, {
.name = "imx51-cspi",
.driver_data = SPI_IMX_VER_0_7,
.driver_data = SPI_IMX_VER_0_4,
}, {
.name = "imx51-ecspi",
.driver_data = SPI_IMX_VER_2_3,
}, {
.name = "imx53-cspi",
.driver_data = SPI_IMX_VER_0_7,
.driver_data = SPI_IMX_VER_0_4,
}, {
.name = "imx53-ecspi",
.driver_data = SPI_IMX_VER_2_3,
Expand Down

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