lkml.org 
[lkml]   [2020]   [Apr]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v6 2/2] tty: samsung_tty: 32-bit access for TX/RX hold registers
From
Date
On 07. 04. 20, 1:08, Hyunki Koo wrote:
> Support 32-bit access for the TX/RX hold registers UTXH and URXH.
>
> This is required for some newer SoCs.
>
> Signed-off-by: Hyunki Koo <hyunki00.koo@samsung.com>
...
> ---
> drivers/tty/serial/samsung_tty.c | 76 +++++++++++++++++++++++++++++++++-------
> 1 file changed, 64 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
> index 73f951d65b93..bdf1d4d12cb1 100644
> --- a/drivers/tty/serial/samsung_tty.c
> +++ b/drivers/tty/serial/samsung_tty.c
> @@ -154,12 +154,47 @@ struct s3c24xx_uart_port {
...
> -#define wr_regb(port, reg, val) writeb_relaxed(val, portaddr(port, reg))
> +static void wr_reg(struct uart_port *port, u32 reg, u32 val)
> +{
> + switch (port->iotype) {
> + case UPIO_MEM:
> + writeb_relaxed(val, portaddr(port, reg));
> + break;
> + case UPIO_MEM32:
> + writel_relaxed(val, portaddr(port, reg));
> + break;
> + }
> +}
> +
> #define wr_regl(port, reg, val) writel_relaxed(val, portaddr(port, reg))
>
> +static void wr_reg_barrier(struct uart_port *port, u32 reg, u32 val)

You need to explain, why you need this _barrier variant now. This change
should be done in a separate patch too.

> +{
> + switch (port->iotype) {
> + case UPIO_MEM:
> + writeb(val, portaddr(port, reg));
> + break;
> + case UPIO_MEM32:
> + writel(val, portaddr(port, reg));
> + break;
> + }
> +}
> +
> /* Byte-order aware bit setting/clearing functions. */
>
> static inline void s3c24xx_set_bit(struct uart_port *port, int idx,

thanks,
--
js
suse labs

\
 
 \ /
  Last update: 2020-04-07 06:50    [W:0.313 / U:13.988 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site