serial: sccnxp: Implement polling mode

This patch adds support for polling work mode, i.e. system is perform
periodical check chip status when IRQ-line is not connected to CPU.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/platform_data/sccnxp.h b/include/linux/platform_data/sccnxp.h
index 7311ccd3217f..096de90cf848 100644
--- a/include/linux/platform_data/sccnxp.h
+++ b/include/linux/platform_data/sccnxp.h
@@ -84,6 +84,8 @@ struct sccnxp_pdata {
         const u8                reg_shift;
         /* Modem control lines configuration */
         const u32               mctrl_cfg[SCCNXP_MAX_UARTS];
+        /* Timer value for polling mode (usecs) */
+        const unsigned int      poll_time_us;
         /* Called during startup */
         void (*init)(void);
         /* Called before finish */