[PATCH v2 4/7] spi/imx: merge type SPI_IMX_VER_0_7 into SPI_IMX_VER_0_4
Shawn Guo
shawn.guo at linaro.org
Sat Jul 9 13:16:38 EDT 2011
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 at linaro.org>
Cc: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Cc: Grant Likely <grant.likely at secretlab.ca>
---
drivers/spi/Kconfig | 5 +---
drivers/spi/spi-imx.c | 70 ++++++++++++------------------------------------
2 files changed, 19 insertions(+), 56 deletions(-)
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 9aafa98..c327cf3 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -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
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 052959df..b282351 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -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 */
@@ -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,
};
@@ -344,32 +339,7 @@ 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;
@@ -378,8 +348,12 @@ 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;
@@ -388,7 +362,9 @@ 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);
@@ -400,10 +376,10 @@ 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);
}
@@ -565,20 +541,10 @@ 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
@@ -734,7 +700,7 @@ 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,
@@ -743,16 +709,16 @@ 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,
--
1.7.4.1
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