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spi: imx: add selection for iMX53 and iMX6 controller

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ECSPI contorller for iMX53 and iMX6 has few hardware issues
comparing to iMX51.
The change add possibility to detect which controller is used
to apply possible workaround and limitations.

Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
jiada wang 2017-06-08 14:16:01 +09:00 committed by Mark Brown
parent fd8d4e2d1f
commit 26e4bb8670
2 changed files with 25 additions and 2 deletions
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1
Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
View File

@ -9,6 +9,7 @@ Required properties:
- "fsl,imx31-cspi" for SPI compatible with the one integrated on i.MX31
- "fsl,imx35-cspi" for SPI compatible with the one integrated on i.MX35
- "fsl,imx51-ecspi" for SPI compatible with the one integrated on i.MX51
- "fsl,imx53-ecspi" for SPI compatible with the one integrated on i.MX53 and later Soc
- reg : Offset and length of the register set for the device
- interrupts : Should contain CSPI/eCSPI interrupt
- cs-gpios : Specifies the gpio pins to be used for chipselects.

26
drivers/spi/spi-imx.c
View File

@ -63,7 +63,8 @@ enum spi_imx_devtype {
IMX27_CSPI,
IMX31_CSPI,
IMX35_CSPI, /* CSPI on all i.mx except above */
IMX51_ECSPI, /* ECSPI on i.mx51 and later */
IMX51_ECSPI, /* ECSPI on i.mx51 */
IMX53_ECSPI, /* ECSPI on i.mx53 and later */
};
struct spi_imx_data;
@ -127,6 +128,11 @@ static inline int is_imx51_ecspi(struct spi_imx_data *d)
return d->devtype_data->devtype == IMX51_ECSPI;
}
static inline int is_imx53_ecspi(struct spi_imx_data *d)
{
return d->devtype_data->devtype == IMX53_ECSPI;
}
#define MXC_SPI_BUF_RX(type) \
static void spi_imx_buf_rx_##type(struct spi_imx_data *spi_imx) \
{ \
@ -752,6 +758,17 @@ static struct spi_imx_devtype_data imx51_ecspi_devtype_data = {
.devtype = IMX51_ECSPI,
};
static struct spi_imx_devtype_data imx53_ecspi_devtype_data = {
.intctrl = mx51_ecspi_intctrl,
.config = mx51_ecspi_config,
.trigger = mx51_ecspi_trigger,
.rx_available = mx51_ecspi_rx_available,
.reset = mx51_ecspi_reset,
.fifo_size = 64,
.has_dmamode = true,
.devtype = IMX53_ECSPI,
};
static const struct platform_device_id spi_imx_devtype[] = {
{
.name = "imx1-cspi",
@ -771,6 +788,9 @@ static const struct platform_device_id spi_imx_devtype[] = {
}, {
.name = "imx51-ecspi",
.driver_data = (kernel_ulong_t) &imx51_ecspi_devtype_data,
}, {
.name = "imx53-ecspi",
.driver_data = (kernel_ulong_t) &imx53_ecspi_devtype_data,
}, {
/* sentinel */
}
@ -783,6 +803,7 @@ static const struct of_device_id spi_imx_dt_ids[] = {
{ .compatible = "fsl,imx31-cspi", .data = &imx31_cspi_devtype_data, },
{ .compatible = "fsl,imx35-cspi", .data = &imx35_cspi_devtype_data, },
{ .compatible = "fsl,imx51-ecspi", .data = &imx51_ecspi_devtype_data, },
{ .compatible = "fsl,imx53-ecspi", .data = &imx53_ecspi_devtype_data, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, spi_imx_dt_ids);
@ -1218,7 +1239,8 @@ static int spi_imx_probe(struct platform_device *pdev)
spi_imx->bitbang.master->prepare_message = spi_imx_prepare_message;
spi_imx->bitbang.master->unprepare_message = spi_imx_unprepare_message;
spi_imx->bitbang.master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
if (is_imx35_cspi(spi_imx) || is_imx51_ecspi(spi_imx))
if (is_imx35_cspi(spi_imx) || is_imx51_ecspi(spi_imx) ||
is_imx53_ecspi(spi_imx))
spi_imx->bitbang.master->mode_bits |= SPI_LOOP | SPI_READY;
spi_imx->spi_drctl = spi_drctl;