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serial_lpuart: Update lpuart driver to support i.MX8

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Add i.MX8 compatible string and cpu type support to lpuart driver,
to use little endian 32 bits configurations.

Also, according to RM, the Receive FIFO Enable (RXFE) field in LPUART
FIFO register is bit 3, so this definition should change to 0x08
(not 0x40) for i.MX8, otherwise the Receive FIFO is not disabled.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Peng Fan 2018-10-18 14:28:31 +02:00 committed by Stefano Babic
parent f77d441091
commit 126f884903
2 changed files with 13 additions and 4 deletions
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15
drivers/serial/serial_lpuart.c
View file

@ -41,7 +41,11 @@
#define CTRL_RE (1 << 18)
#define FIFO_TXFE 0x80
#ifdef CONFIG_ARCH_IMX8
#define FIFO_RXFE 0x08
#else
#define FIFO_RXFE 0x40
#endif
#define WATER_TXWATER_OFF 1
#define WATER_RXWATER_OFF 16
@ -54,7 +58,8 @@ DECLARE_GLOBAL_DATA_PTR;
enum lpuart_devtype {
DEV_VF610 = 1,
DEV_LS1021A,
DEV_MX7ULP
DEV_MX7ULP,
DEV_IMX8
};
struct lpuart_serial_platdata {
@ -325,7 +330,7 @@ static int _lpuart32_serial_init(struct lpuart_serial_platdata *plat)
lpuart_write32(plat->flags, &base->match, 0);
if (plat->devtype == DEV_MX7ULP) {
if (plat->devtype == DEV_MX7ULP || plat->devtype == DEV_IMX8) {
_lpuart32_serial_setbrg_7ulp(plat, gd->baudrate);
} else {
/* provide data bits, parity, stop bit, etc */
@ -342,7 +347,7 @@ static int lpuart_serial_setbrg(struct udevice *dev, int baudrate)
struct lpuart_serial_platdata *plat = dev->platdata;
if (is_lpuart32(dev)) {
if (plat->devtype == DEV_MX7ULP)
if (plat->devtype == DEV_MX7ULP || plat->devtype == DEV_IMX8)
_lpuart32_serial_setbrg_7ulp(plat, baudrate);
else
_lpuart32_serial_setbrg(plat, baudrate);
@ -427,6 +432,8 @@ static int lpuart_serial_ofdata_to_platdata(struct udevice *dev)
plat->devtype = DEV_MX7ULP;
else if (!fdt_node_check_compatible(blob, node, "fsl,vf610-lpuart"))
plat->devtype = DEV_VF610;
else if (!fdt_node_check_compatible(blob, node, "fsl,imx8qm-lpuart"))
plat->devtype = DEV_IMX8;
return 0;
}
@ -444,6 +451,8 @@ static const struct udevice_id lpuart_serial_ids[] = {
{ .compatible = "fsl,imx7ulp-lpuart",
.data = LPUART_FLAG_REGMAP_32BIT_REG },
{ .compatible = "fsl,vf610-lpuart"},
{ .compatible = "fsl,imx8qm-lpuart",
.data = LPUART_FLAG_REGMAP_32BIT_REG },
{ }
};

2
include/fsl_lpuart.h
View file

@ -4,7 +4,7 @@
*
*/
#ifdef CONFIG_ARCH_MX7ULP
#if defined(CONFIG_ARCH_MX7ULP) || defined(CONFIG_ARCH_IMX8)
struct lpuart_fsl_reg32 {
u32 verid;
u32 param;