Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932711Ab3GCJlk (ORCPT ); Wed, 3 Jul 2013 05:41:40 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:39129 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932065Ab3GCJlj (ORCPT ); Wed, 3 Jul 2013 05:41:39 -0400 From: Alexander Savchenko To: , CC: , , Subject: [RESEND][PATCH] OMAP2+: UART: enable tx wakeup bit for wer reg Date: Wed, 3 Jul 2013 12:41:31 +0300 Message-ID: <1372844491-7172-1-git-send-email-oleksandr.savchenko@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3008 Lines: 96 From: "Govindraj.R" >From omap36xx onwards the module wakeup enable reg wer has TX wakeup bit available enable the same by populating the necessary tx wakeup flag for the applicable module ip blocks and use the same while configuaring wer reg. Also wer is not context restored, restore wer when context is lost. Cc: Paul Walmsley Cc: Felipe Balbi Cc: Kevin Hilman Acked-by: Greg Kroah-Hartman (for drivers/tty changes) Signed-off-by: Govindraj.R Signed-off-by: Alexander Savchenko --- [rebased according to 3.10] drivers/tty/serial/omap-serial.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index b6d1728..b9fa344 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -52,6 +52,11 @@ #define OMAP_UART_REV_52 0x0502 #define OMAP_UART_REV_63 0x0603 +#define OMAP_UART_TX_WAKEUP_EN BIT(7) + +/* Feature flags */ +#define OMAP_UART_WER_HAS_TX_WAKEUP BIT(0) + #define UART_ERRATA_i202_MDR1_ACCESS BIT(0) #define UART_ERRATA_i291_DMA_FORCEIDLE BIT(1) @@ -137,6 +142,7 @@ struct uart_omap_port { unsigned char dlh; unsigned char mdr1; unsigned char scr; + unsigned char wer; int use_dma; /* @@ -151,6 +157,7 @@ struct uart_omap_port { int context_loss_cnt; u32 errata; u8 wakeups_enabled; + u32 features; int DTR_gpio; int DTR_inverted; @@ -683,7 +690,11 @@ static int serial_omap_startup(struct uart_port *port) serial_out(up, UART_IER, up->ier); /* Enable module level wake up */ - serial_out(up, UART_OMAP_WER, OMAP_UART_WER_MOD_WKUP); + up->wer = OMAP_UART_WER_MOD_WKUP; + if (up->features & OMAP_UART_WER_HAS_TX_WAKEUP) + up->wer |= OMAP_UART_TX_WAKEUP_EN; + + serial_out(up, UART_OMAP_WER, up->wer); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); @@ -1373,9 +1384,11 @@ static void omap_serial_fill_features_erratas(struct uart_omap_port *up) case OMAP_UART_REV_52: up->errata |= (UART_ERRATA_i202_MDR1_ACCESS | UART_ERRATA_i291_DMA_FORCEIDLE); + up->features |= OMAP_UART_WER_HAS_TX_WAKEUP; break; case OMAP_UART_REV_63: up->errata |= UART_ERRATA_i202_MDR1_ACCESS; + up->features |= OMAP_UART_WER_HAS_TX_WAKEUP; break; default: break; @@ -1609,6 +1622,7 @@ static void serial_omap_restore_context(struct uart_omap_port *up) serial_omap_mdr1_errataset(up, up->mdr1); else serial_out(up, UART_OMAP_MDR1, up->mdr1); + serial_out(up, UART_OMAP_WER, up->wer); } static int serial_omap_runtime_suspend(struct device *dev) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/