diff options
| author |   Govindraj.R <govindraj.raja@ti.com> | 2013-07-05 18:25:59 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-26 15:53:34 -0700 |
| commit | f64ffda60e2c9b69ff2125e90cfca234b2eece2b (patch) | |
| tree | c32fd500c3c3f8203362370f3c27eb11e9c30a02 /drivers/tty/serial/omap-serial.c | |
| parent | 8250_pci: improve code comments and Kconfig help (diff) | |
| download | linux-dev-f64ffda60e2c9b69ff2125e90cfca234b2eece2b.tar.xz linux-dev-f64ffda60e2c9b69ff2125e90cfca234b2eece2b.zip | |
OMAP2+: UART: enable tx wakeup bit for wer 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 <paul@pwsan.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Kevin Hilman <kevin.hilman@linaro.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(for drivers/tty changes)
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/omap-serial.c')
| -rw-r--r-- | drivers/tty/serial/omap-serial.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index eacb0def3d96..33c758e09d86 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -51,6 +51,11 @@ #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) @@ -136,6 +141,7 @@ struct uart_omap_port { unsigned char dlh; unsigned char mdr1; unsigned char scr; + unsigned char wer; int use_dma; /* @@ -150,6 +156,7 @@ struct uart_omap_port { int context_loss_cnt; u32 errata; u8 wakeups_enabled; + u32 features; int DTR_gpio; int DTR_inverted; @@ -681,7 +688,11 @@ 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); @@ -1371,9 +1382,11 @@ 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; @@ -1600,6 +1613,7 @@ 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) |