[PATCH V2 1/6] tty: serial: lpuart: introduce lpuart_soc_data to represent SoC property
From: aisheng.dong@nxp.com (Dong Aisheng)
Date: 2017-05-15 07:50:37
Also in:
linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
This is used to dynamically check the SoC specific lpuart properies. Currently only the checking of 32 bit register width is added which functions the same as before. More will be added later for supporting new chips. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <redacted> Cc: Stefan Agner <stefan@agner.ch> Cc: Mingkai Hu <Mingkai.Hu@nxp.com> Cc: Yangbo Lu <yangbo.lu@nxp.com> Acked-by: Fugang Duan <redacted> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> --- ChangeLog: v1->v2: * make all soc_data const --- drivers/tty/serial/fsl_lpuart.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 15df1ba7..7204103 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c@@ -258,13 +258,21 @@ struct lpuart_port { wait_queue_head_t dma_wait; }; +struct lpuart_soc_data { + bool is_32; +}; + +static const struct lpuart_soc_data vf_data = { + .is_32 = false, +}; + +static const struct lpuart_soc_data ls_data = { + .is_32 = true, +}; + static const struct of_device_id lpuart_dt_ids[] = { - { - .compatible = "fsl,vf610-lpuart", - }, - { - .compatible = "fsl,ls1021a-lpuart", - }, + { .compatible = "fsl,vf610-lpuart", .data = &vf_data, }, + { .compatible = "fsl,ls1021a-lpuart", .data = &ls_data, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, lpuart_dt_ids);
@@ -1971,6 +1979,9 @@ static struct uart_driver lpuart_reg = { static int lpuart_probe(struct platform_device *pdev) { + const struct of_device_id *of_id = of_match_device(lpuart_dt_ids, + &pdev->dev); + const struct lpuart_soc_data *sdata = of_id->data; struct device_node *np = pdev->dev.of_node; struct lpuart_port *sport; struct resource *res;
@@ -1988,7 +1999,7 @@ static int lpuart_probe(struct platform_device *pdev) return ret; } sport->port.line = ret; - sport->lpuart32 = of_device_is_compatible(np, "fsl,ls1021a-lpuart"); + sport->lpuart32 = sdata->is_32; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); sport->port.membase = devm_ioremap_resource(&pdev->dev, res);
--
2.7.4