On Wed, Sep 21, 2011 at 5:41 PM, Govindraj.R govindraj.r...@ti.com wrote:
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 Irq_chaining patches.
Dependent irq_chaining patches are as below.
3d5b543 omap3: pm: use prcm chain handler
c00b340 OMAP2+: mux: add support for PAD wakeup interrupts
db6397c power: omap-prm: added chain interrupt handler
b3f8628 TEMP: OMAP4xxx: hwmod data: add PRM hwmod
61ec0fc TEMP: OMAP3xxx: hwmod data: add PRM hwmod
a1ecf8c power: add omap prm driver skeleton
Same combination is hosted at:
git://gitorious.org/runtime_3-0/runtime_3-0.git v5_uart_irqchn
Update:
---
This patch series was tested against Tero's Irq chaining v9 [1]
tmp patches where dropped from tero's series and applied
on top v5 uart_runtime patches.
same combination is hosted here [2]
--
Thanks,
Govindraj.R
[1]:
43c5073 omap3+: add omap prm driver initialization
dad7fc5 OMAP3: pm: do not enable PRCM MPU interrupts manually
c205290 omap3: pm: use prcm chain handler
453656e OMAP2+: mux: add support for PAD wakeup interrupts
563bed3 mfd: omap-prm: added suspend prepare and complete callbacks
ff8770a mfd: omap-prm: added chain interrupt handler
46386a9 mfd: omap-prm: add driver skeleton
bdc8ddf TEMP: OMAP4xxx: hwmod data: add PRM hwmod
8cc0382 TEMP: OMAP3xxx: hwmod data: add PRM hwmod
[2]: git://gitorious.org/runtime_3-0/runtime_3-0.git v5_uart_runtime
Ensure CONFIG_OMAP_PRM is set while testing irq_chaining with uart.
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:
3430SDP:
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]
OMAP4430-SDP: Boot tested.
OMAP2420/2430SDP: Boot tested.
Deepak K (1):
OMAP2+: UART: Allow UART parameters to be configured from board file.
Govindraj.R (13):
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: 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 | 8 +-
arch/arm/mach-omap2/board-n8x0.c | 6 +-
arch/arm/mach-omap2/board-omap4panda.c | 8 +-
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 | 19 -
arch/arm/mach-omap2/pm34xx.c | 24 -
arch/arm/mach-omap2/serial.c | 933
+++--
arch/arm/plat-omap/include/plat/omap-serial.h | 30 +-
arch/arm/plat-omap/include/plat/omap_hwmod.h | 1 +
