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serial: imx: Simplify compatibility handling

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Three of the four entries of imx_uart_devdata[] use .uts_reg =
IMX21_UTS. The difference in the .devtype member isn't relevant, the
only thing that matters is if is equal to IMX1_UART.

So use an entry with .devtype = IMX21_UART on all platforms but i.MX1.
There is no need to have the dev types in an array, so split them up in
two separate variables.

The fsl,imx53-uart devinfo can go away because in the binding and also
the dts files all fsl,imx53-uart devices also are compatible to
fsl,imx21-uart. That's not the case for fsl,imx6q-uart (which is a bit
strange IMHO), so the fsl,imx6q-uart must stay around.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230911085451.628798-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Uwe Kleine-König 2023-09-11 10:54:51 +02:00 • committed by Greg Kroah-Hartman
parent 064f3bb3bc
commit 305a5dd7a3
1 changed files with 17 additions and 23 deletions
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40
drivers/tty/serial/imx.c
View file

@ -177,8 +177,6 @@
enum imx_uart_type {
IMX1_UART,
IMX21_UART,
IMX53_UART,
IMX6Q_UART,
};
/* device type dependent stuff */
@ -240,30 +238,26 @@ struct imx_port_ucrs {
unsigned int ucr3;
};
static struct imx_uart_data imx_uart_devdata[] = {
[IMX1_UART] = {
.uts_reg = IMX1_UTS,
.devtype = IMX1_UART,
},
[IMX21_UART] = {
.uts_reg = IMX21_UTS,
.devtype = IMX21_UART,
},
[IMX53_UART] = {
.uts_reg = IMX21_UTS,
.devtype = IMX53_UART,
},
[IMX6Q_UART] = {
.uts_reg = IMX21_UTS,
.devtype = IMX6Q_UART,
},
static const struct imx_uart_data imx_uart_imx1_devdata = {
.uts_reg = IMX1_UTS,
.devtype = IMX1_UART,
};
static const struct imx_uart_data imx_uart_imx21_devdata = {
.uts_reg = IMX21_UTS,
.devtype = IMX21_UART,
};
static const struct of_device_id imx_uart_dt_ids[] = {
{ .compatible = "fsl,imx6q-uart", .data = &imx_uart_devdata[IMX6Q_UART], },
{ .compatible = "fsl,imx53-uart", .data = &imx_uart_devdata[IMX53_UART], },
{ .compatible = "fsl,imx1-uart", .data = &imx_uart_devdata[IMX1_UART], },
{ .compatible = "fsl,imx21-uart", .data = &imx_uart_devdata[IMX21_UART], },
/*
* For reasons unknown to me, some UART devices (e.g. imx6ul's) are
* compatible to fsl,imx6q-uart, but not fsl,imx21-uart, while the
* original imx6q's UART is compatible to fsl,imx21-uart. This driver
* doesn't make any distinction between these two variants.
*/
{ .compatible = "fsl,imx6q-uart", .data = &imx_uart_imx21_devdata, },
{ .compatible = "fsl,imx1-uart", .data = &imx_uart_imx1_devdata, },
{ .compatible = "fsl,imx21-uart", .data = &imx_uart_imx21_devdata, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_uart_dt_ids);