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| author | Deepak K <deepak.k@ti.com> | 2011-11-09 17:33:38 +0530 |
|---|---|---|
| committer | Kevin Hilman <khilman@ti.com> | 2011-12-14 16:05:24 -0800 |
| commit | c86845db77ce220f77e6645b18800744684946ac (patch) | |
| tree | f110531ca7ae25eb8193bd47f5ad78254eee92cc /arch/arm/plat-omap | |
| parent | 634bd6e4817cd6a7109be8d2eee5c578a283d1ee (diff) | |
| download | lwn-c86845db77ce220f77e6645b18800744684946ac.tar.gz lwn-c86845db77ce220f77e6645b18800744684946ac.zip | |
ARM: OMAP2+: UART: Allow UART parameters to be configured from board file.
The following UART parameters are defined within the UART driver:
1). Whether the UART uses DMA (dma_enabled), by default set to 0
2). The size of dma buffer (set to 4096 bytes)
3). The time after which the dma should stop if no more data is received.
4). The auto suspend delay that will be passed for pm_runtime_autosuspend
where uart will be disabled after timeout
Different UARTs may be used for different purpose such as the console,
for interfacing bluetooth chip, for interfacing to a modem chip, etc.
Therefore, it is necessary to be able to customize the above settings
for a given board on a per UART basis.
This change allows these parameters to be configured from the board file
and allows the parameters to be configured for each UART independently.
If a board does not define its own custom parameters for the UARTs, then
use the default parameters in the structure "omap_serial_default_info".
The default parameters are defined to be the same as the current settings
in the UART driver to avoid breaking the UART for any cuurnelty supported
boards. By default, make all boards use the default UART parameters.
Signed-off-by: Deepak K <deepak.k@ti.com>
Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de> (for drivers/tty changes)
Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/omap-serial.h | 7 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/serial.h | 5 |
2 files changed, 9 insertions, 3 deletions
diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h index 39709ecfd58f..a740a6c0e104 100644 --- a/arch/arm/plat-omap/include/plat/omap-serial.h +++ b/arch/arm/plat-omap/include/plat/omap-serial.h @@ -66,6 +66,9 @@ struct omap_uart_port_info { unsigned int uartclk; /* UART clock rate */ upf_t flags; /* UPF_* flags */ u32 errata; + unsigned int dma_rx_buf_size; + unsigned int dma_rx_timeout; + unsigned int autosuspend_timeout; int (*get_context_loss_count)(struct device *); void (*set_forceidle)(struct platform_device *); @@ -94,8 +97,8 @@ struct uart_omap_dma { spinlock_t rx_lock; /* timer to poll activity on rx dma */ struct timer_list rx_timer; - int rx_buf_size; - int rx_timeout; + unsigned int rx_buf_size; + unsigned int rx_timeout; }; struct uart_omap_port { diff --git a/arch/arm/plat-omap/include/plat/serial.h b/arch/arm/plat-omap/include/plat/serial.h index 152500b558a2..38b3e38df2a0 100644 --- a/arch/arm/plat-omap/include/plat/serial.h +++ b/arch/arm/plat-omap/include/plat/serial.h @@ -106,10 +106,13 @@ #ifndef __ASSEMBLER__ struct omap_board_data; +struct omap_uart_port_info; extern void omap_serial_init(void); -extern void omap_serial_init_port(struct omap_board_data *bdata); extern int omap_uart_can_sleep(void); +extern void omap_serial_board_init(struct omap_uart_port_info *platform_data); +extern void omap_serial_init_port(struct omap_board_data *bdata, + struct omap_uart_port_info *platform_data); #endif #endif |