Messages in this thread Patch in this message | | | Date | Mon, 24 Sep 2012 08:20:18 +0200 | From | Christophe Leroy <> | Subject | [PATCH] Powerpc 8xx CPM_UART maxidl should not depend on fifo size |
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maxidl register was set to fifo size. There is no reason to set this register to same value as fifo size. Setting it now to 0x10 by default as in the UCC UART driver.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
--- linux-3.5-vanilla/drivers/tty/serial/cpm_uart/cpm_uart_core.c 2012-07-21 22:58:29.000000000 +0200 +++ linux-3.5/drivers/tty/serial/cpm_uart/cpm_uart_core.c 2012-08-09 17:38:37.000000000 +0200 @@ -799,7 +799,7 @@ cpm_set_scc_fcr(sup); out_be16(&sup->scc_genscc.scc_mrblr, pinfo->rx_fifosize); - out_be16(&sup->scc_maxidl, pinfo->rx_fifosize); + out_be16(&sup->scc_maxidl, 0x10); out_be16(&sup->scc_brkcr, 1); out_be16(&sup->scc_parec, 0); out_be16(&sup->scc_frmec, 0); @@ -873,7 +873,7 @@ /* Using idle character time requires some additional tuning. */ out_be16(&up->smc_mrblr, pinfo->rx_fifosize); - out_be16(&up->smc_maxidl, pinfo->rx_fifosize); + out_be16(&up->smc_maxidl, 0x10); out_be16(&up->smc_brklen, 0); out_be16(&up->smc_brkec, 0); out_be16(&up->smc_brkcr, 1);
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