[U-Boot] [PATCH 1/4] armv8/ls1043aqds: added lpuart support

[Mingkai Hu]

> -----Original Message-----
> From: Wenbin Song [mailto:wenbin.song at nxp.com]
> Sent: Tuesday, January 19, 2016 2:48 PM
> To: yorksun at freescale.com; Mingkai Hu; Qianyu Gong; Shaohui Xie; Wenbin
> Song; u-boot at lists.denx.de
> Subject: [PATCH 1/4] armv8/ls1043aqds: added lpuart support
> 
> From: Shaohui Xie <shaohui.xie at nxp.com>
> 
> Signed-off-by: Shaohui Xie <shaohui.xie at nxp.com>
> Signed-off-by: Mingkai Hu <mingkai.hu at nxp.com>
> ---
>  board/freescale/ls1043aqds/ls1043aqds.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/board/freescale/ls1043aqds/ls1043aqds.c
> b/board/freescale/ls1043aqds/ls1043aqds.c
> index d6696ca..1da3fe1 100644
> --- a/board/freescale/ls1043aqds/ls1043aqds.c
> +++ b/board/freescale/ls1043aqds/ls1043aqds.c
> @@ -40,6 +40,9 @@ enum {
>  #define CFG_SD_MUX3_MUX4	0x1 /* MUX4 */
>  #define CFG_SD_MUX4_SLOT3	0x0 /* SLOT3 TX/RX1 */
>  #define CFG_SD_MUX4_SLOT1	0x1 /* SLOT1 TX/RX3 */
> +#define CFG_UART_MUX_MASK	0x6
> +#define CFG_UART_MUX_SHIFT	1
> +#define CFG_LPUART_EN		0x1
> 
>  int checkboard(void)
>  {
> @@ -218,7 +221,19 @@ void board_retimer_init(void)
> 
>  int board_early_init_f(void)
>  {
> +#ifdef CONFIG_LPUART
> +	u8 uart;
> +#endif
>  	fsl_lsch2_early_init_f();
> +#ifdef CONFIG_LPUART
> +	/*FIXME: need to check which lpuart is enabled in rcw, for now
> +	 * we use lpuart1.
> +	 */
> +	uart = QIXIS_READ(brdcfg[14]);
> +	uart &= ~CFG_UART_MUX_MASK;
> +	uart |= CFG_LPUART_EN << CFG_UART_MUX_SHIFT;
> +	QIXIS_WRITE(brdcfg[14], uart);
> +#endif
> 

Please use the RCW to check which LPUART is enabled.

Thanks,
Mingkai