spi: imx: add selection for iMX53 and iMX6 controller
authorjiada wang <jiada_wang@mentor.com>
Thu, 8 Jun 2017 05:16:01 +0000 (14:16 +0900)
committerMark Brown <broonie@kernel.org>
Mon, 17 Jul 2017 11:09:48 +0000 (12:09 +0100)
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>
Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt
drivers/spi/spi-imx.c

index 31b5b21..5bf1396 100644 (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.
index d3093f3..424dd01 100644 (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",
@@ -772,6 +789,9 @@ 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;