Converting uart driver to adapt to pm runtime API's.
Code re-org + cleanup.
Moving some functionality from serial.c to omap-serial.c
Changes involves:
================
1.) Cleaning up certain uart calls from sram_idle func.
2.) Removed all types of uart clock handling code from serial.c
3.) Using hwmod_mux API enable wakeup capability for uart pad during
hwmod_idle state i.e., when uart clocks are disabled we can enable
io-pad wakeup capability for uart if mux_data is available for
given uart. Also during during resume from idle call to uart we need
to enable clocks back conditionally and this can be done only when io-pad
wakeup event bit is set for uart_rx pad. So we need a hwmod API
which can probe the uart pad and let us know whether a uart wakeup
happened. So omap_hmwod_pad_wakeup_status API is added to meet this
requirement.
3.) Adapted omap-serial driver to use runtime API's.
4.) Modify serial_init calls to accept uart parameters from board file.
Like dma_usage, rx_timeout, dma_rx_pollrate, auto_suspend_timeout etc.
5.) Use the omap_prm driver with irq_chaining to wake up uart after clocks are
cut.
Patch series is based on 3.1.0-rc4 + omap_device fixes.
>From Kevin's tree.
git://gitorious.org/khilman/linux-omap-pm.git for_3.2/omap_device
Also the patch series depends on Tero's v9 Irq_chaining patches.
Dependent irq_chaining patches are as below.
e9e7ae1 omap3+: add omap prm driver initialization
e52486f OMAP3: pm: do not enable PRCM MPU interrupts manually
ae5f2af omap3: pm: use prcm chain handler
61ad50f OMAP2+: mux: add support for PAD wakeup interrupts
cab47bf mfd: omap-prm: added suspend prepare and complete callbacks
8ed5bcd mfd: omap-prm: added chain interrupt handler
024f0e3 mfd: omap-prm: add driver skeleton
d285827 TEMP: OMAP4xxx: hwmod data: add PRM hwmod
da6f48f TEMP: OMAP3xxx: hwmod data: add PRM hwmod
Same combination is hosted at:
git://gitorious.org/runtime_3-0/runtime_3-0.git v6_uart_runtime
Ensure CONFIG_OMAP_PRM is set while testing irq_chaining with uart.
Changes from v5:
---------------
* Incorporating omap_uart_can_sleep function to avoid
console sluglishness as reported by tero.
* fixing below comments adding omap4 for autosuspend and wakeup.
http://www.mail-archive.com/linux-omap@xxxxxxxxxxxxxxx/msg56221.html
In addition cleaning up pads from omap4430sdp/panda board file
to use default pads from serial.c
Changes from v4:
---------------
1.) Fixing v4 comments from Kevin.
Spilt into smaller logical patches.
2.) Using Irq_chaining OMAP_PRM driver for waking up uart.
Testing updates:
----------------
OMAP2420/2430SDP: Boot tested.
OMAP3430SDP:
retention, off_mode, system_wide suspend is tested.
(earlyprintk & no_console_suspend checked)
OMAP3630 - Zoom3:
pm-retention checked with quart/omap-uart3
[Also tested with uart3 as console uart and pm-ret checked]
BeagleBoard XM Rev C(3630):
retention, off_mode, system_wide suspend is tested.
OMAP4430-SDP/PANDA-4430/PANDA-4460: Boot tested.
Deepak K (1):
OMAP2+: UART: Allow UART parameters to be configured from board file.
Govindraj.R (14):
OMAP2+: hwmod: Add API to enable IO ring wakeup.
OMAP2+: hwmod: Add API to check IO PAD wakeup status
OMAP2+: UART: cleanup + remove uart pm specific API
OMAP2+: UART: cleanup 8250 console driver support
OMAP2+: UART: Cleanup part of clock gating mechanism for uart
OMAP2+: UART: Remove certain feilds from omap_uart_state struct
OMAP2+: UART: Add default mux for all uarts.
OMAP2+: UART: Store certain reg values to port structure
OMAP2+: UART: Add runtime pm support for omap-serial driver
OMAP2+: UART: Modify omap_uart_can_sleep function
OMAP2+: UART: Move errata handling from serial.c to omap-serial
OMAP2+: UART: Take console_lock in suspend path if not taken
OMAP2+: UART: Enable back uart clocks with runtime API for early
console
OMAP2+: UART: Do not gate uart clocks if used for debug_prints
Jon Hunter (1):
OMAP2+: UART: Make the RX_TIMEOUT for DMA configurable for each UART
arch/arm/mach-omap2/board-3430sdp.c | 100 +---
arch/arm/mach-omap2/board-4430sdp.c | 68 +--
arch/arm/mach-omap2/board-n8x0.c | 6 +-
arch/arm/mach-omap2/board-omap4panda.c | 68 +--
arch/arm/mach-omap2/mux.c | 30 +
arch/arm/mach-omap2/mux.h | 13 +
arch/arm/mach-omap2/omap_hwmod.c | 66 ++
arch/arm/mach-omap2/pm24xx.c | 18 -
arch/arm/mach-omap2/pm34xx.c | 23 -
arch/arm/mach-omap2/serial.c | 937 +++++++------------------
arch/arm/plat-omap/include/plat/omap-serial.h | 30 +-
arch/arm/plat-omap/include/plat/omap_hwmod.h | 1 +
arch/arm/plat-omap/include/plat/serial.h | 10 +-
drivers/tty/serial/omap-serial.c | 305 +++++++--
14 files changed, 660 insertions(+), 1015 deletions(-)
--
1.7.4.1
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