Shakti-platform-UART-Update

[Xiang W]

在 2022-07-01星期五的 20:12 +0530，Prasanna T写道：
> Please find the attached revised patch, with respect to the latest changes made. Have dealt other amendments through dts. A primary change
> that was made as part of this patch is follows.The age old version of UART was upgraded long back, but that was missed out in the code which
> we did updated now (The old version of UART is not supported anymore, hence removed the inline comment which is also outdated now), The
> current version is the only UART supported right now by Shakti
> ---
> 
> diff --git a/lib/utils/serial/shakti-uart.c b/lib/utils/serial/shakti-uart.c
> index 5f2fe75..122218b 100644
> --- a/lib/utils/serial/shakti-uart.c
> +++ b/lib/utils/serial/shakti-uart.c
> @@ -19,21 +19,22 @@
>  #define REG_RX_THRES   0x20
>  
>  #define UART_TX_FULL  0x2
> +#define UART_RX_NOT_EMPTY 0x4
>  #define UART_RX_FULL  0x8
>  
>  static volatile char *uart_base;
>  
>  static void shakti_uart_putc(char ch)
>  {
> -       while((readw(uart_base + REG_STATUS) & UART_TX_FULL))
> +       while((readb(uart_base + REG_STATUS) & UART_TX_FULL))
>                 ;
>         writeb(ch, uart_base + REG_TX);
>  }
>  
>  static int shakti_uart_getc(void)
>  {
> -       u16 status = readw(uart_base + REG_STATUS);
> -       if (status & UART_RX_FULL)
> +       u16 status = readb(uart_base + REG_STATUS);
readb return u8. So the type of 'status' needs to be u8.

Regards,
Xiang W
> +       if (status & UART_RX_NOT_EMPTY)
>                 return readb(uart_base + REG_RX);
>         return -1;
>  }
>