> From: linux-can-owner@xxxxxxxxxxxxxxx <linux-can-
> owner@xxxxxxxxxxxxxxx> On Behalf Of Sean Nyekjaer
> Sent: 09 December 2019 14:45
> Subject: [PATCH] can: m_can: remove double clearing of clock stop request
> bit
>
> In m_can_config_endisable the CSA bit cleared 2 times while enabling
> configuration mode.
>
> According to the datasheet:
> If a Read-Modify-Write operation is performed in Standby mode a CSR = 1
> will be read back but a 0 should be written to it.
>
> Signed-off-by: Sean Nyekjaer <sean@xxxxxxxxxx>
Acked-by: Sriram Dash <sriram.dash@xxxxxxxxxxx>
> ---
> drivers/net/can/m_can/m_can.c | 4 ----
> 1 file changed, 4 deletions(-)
>
> diff --git a/drivers/net/can/m_can/m_can.c
> b/drivers/net/can/m_can/m_can.c index 02c5795b7393..4edc6f6e5165
> 100644
> --- a/drivers/net/can/m_can/m_can.c
> +++ b/drivers/net/can/m_can/m_can.c
> @@ -380,10 +380,6 @@ void m_can_config_endisable(struct
> m_can_classdev *cdev, bool enable)
> cccr &= ~CCCR_CSR;
>
> if (enable) {
> - /* Clear the Clock stop request if it was set */
> - if (cccr & CCCR_CSR)
> - cccr &= ~CCCR_CSR;
> -
> /* enable m_can configuration */
> m_can_write(cdev, M_CAN_CCCR, cccr | CCCR_INIT);
> udelay(5);
> --
> 2.24.0
