[PATCH 15/20] serial_lpuart: add support for i.MXRT

Lukasz Majewski
2019-12-08T14:58:24Z

On Wed, 4 Dec 2019 18:44:34 +0100
Giulio Benetti <giulio.benetti@benettiengineering.com> wrote:

> Add i.MXRT compatible string and cpu type support to lpuart driver,
> to use little endian 32 bits configurations.
>
> Also according to RM, the Receive RX FIFO Enable (RXFE) field in
> LPUART FIFO register is bit 3, so this definition should change to
> 0x08 as done for i.MX8. It needs also to set baudrate the same way as
> i.MX8 does.
>
> Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
> ---
> drivers/serial/serial_lpuart.c | 15 +++++++++++----
> include/fsl_lpuart.h | 3 ++-
> 2 files changed, 13 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/serial/serial_lpuart.c
> b/drivers/serial/serial_lpuart.c index 52bd2baf7d..2ac4c6d56a 100644
> --- a/drivers/serial/serial_lpuart.c
> +++ b/drivers/serial/serial_lpuart.c
> @@ -49,7 +49,7 @@
> #define FIFO_RXSIZE_MASK 0x7
> #define FIFO_RXSIZE_OFF 0
> #define FIFO_TXFE 0x80
> -#ifdef CONFIG_ARCH_IMX8
> +#if defined(CONFIG_ARCH_IMX8) || defined(CONFIG_ARCH_IMXRT)
> #define FIFO_RXFE 0x08
> #else
> #define FIFO_RXFE 0x40
> @@ -67,7 +67,8 @@ enum lpuart_devtype {
> DEV_VF610 = 1,
> DEV_LS1021A,
> DEV_MX7ULP,
> - DEV_IMX8
> + DEV_IMX8,
> + DEV_IMXRT,
> };
>
> struct lpuart_serial_platdata {
> @@ -409,7 +410,8 @@ static int _lpuart32_serial_init(struct udevice
> *dev)
> lpuart_write32(plat->flags, &base->match, 0);
>
> - if (plat->devtype == DEV_MX7ULP || plat->devtype ==
> DEV_IMX8) {
> + if (plat->devtype == DEV_MX7ULP || plat->devtype == DEV_IMX8
> ||
> + plat->devtype == DEV_IMXRT) {
> _lpuart32_serial_setbrg_7ulp(dev, gd->baudrate);
> } else {
> /* provide data bits, parity, stop bit, etc */
> @@ -426,7 +428,8 @@ static int lpuart_serial_setbrg(struct udevice
> *dev, int baudrate) struct lpuart_serial_platdata *plat =
> dev_get_platdata(dev);
> if (is_lpuart32(dev)) {
> - if (plat->devtype == DEV_MX7ULP || plat->devtype ==
> DEV_IMX8)
> + if (plat->devtype == DEV_MX7ULP || plat->devtype ==
> DEV_IMX8 ||
> + plat->devtype == DEV_IMXRT)
> _lpuart32_serial_setbrg_7ulp(dev, baudrate);
> else
> _lpuart32_serial_setbrg(dev, baudrate);
> @@ -527,6 +530,8 @@ static int
> lpuart_serial_ofdata_to_platdata(struct udevice *dev) plat->devtype =
> DEV_VF610; else if (!fdt_node_check_compatible(blob, node,
> "fsl,imx8qm-lpuart")) plat->devtype = DEV_IMX8;
> + else if (!fdt_node_check_compatible(blob, node,
> "fsl,imxrt-lpuart"))
> + plat->devtype = DEV_IMXRT;
>
> return 0;
> }
> @@ -546,6 +551,8 @@ static const struct udevice_id
> lpuart_serial_ids[] = { { .compatible = "fsl,vf610-lpuart"},
> { .compatible = "fsl,imx8qm-lpuart",
> .data = LPUART_FLAG_REGMAP_32BIT_REG },
> + { .compatible = "fsl,imxrt-lpuart",
> + .data = LPUART_FLAG_REGMAP_32BIT_REG },
> { }
> };
>
> diff --git a/include/fsl_lpuart.h b/include/fsl_lpuart.h
> index fc517d4b7f..511fb84367 100644
> --- a/include/fsl_lpuart.h
> +++ b/include/fsl_lpuart.h
> @@ -4,7 +4,8 @@
> *
> */
>
> -#if defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8)
> +#if defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8) || \
> + defined(CONFIG_ARCH_IMXRT)
> struct lpuart_fsl_reg32 {
> u32 verid;
> u32 param;

Please also used buildman to check if this patch series is bisectable
(i.e. if it can be build without errors for each separate commit).

For example:
./tools/buildman/buildman.py --branch=HEAD odroid edison trats trats2
--show_errors --force-build --count=4 --output-dir=../BUILD/

Best regards,

Lukasz Majewski

--

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