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modem: iface_uart: use ring_buf_{claim,finish} API

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This API allows to drop use of preallocated isr_buf. Most importantly as
a result RAM usage is reduced for each driver utilizing modem_context
framework. Additionally there is less copying done in ISR context, as
data is direcly read from UART FIFO to ring_buf.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
This commit is contained in:
Marcin Niestroj 2020-09-28 21:47:04 +02:00 • committed by Jukka Rissanen
commit 763bd27c75
6 changed files with 22 additions and 24 deletions
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4
drivers/modem/modem_iface_uart.h
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@ -20,10 +20,6 @@ extern "C" {
#endif
struct modem_iface_uart_data {
/* ISR char buffer */
char *isr_buf;
size_t isr_buf_len;
/* ring buffer char buffer */
char *rx_rb_buf;
size_t rx_rb_buf_len;