Commit d5b52b5992a509b58eb0fe00979f72d179bc7594
Committed by
Satyanarayana Sandhya
Satyanarayana Sandhya
1 parent
90009ff413
Exists in
v3.2_SMARCT335xPSP_04.06.00.11
and in
3 other branches
ARM: OMAP: Don't restore of DMTIMER TISTAT register
The timer TISTAT register is a read-only register and therefore restoring the context is not needed. Furthermore, the context of TISTAT is never saved anywhere in the current code. The TISTAT register is read-only for all OMAP devices from OMAP1 to OMAP4. OMAP5 timers no longer have this register. [akshay.s@ti.com: Observed a crash when adding support for the DMTIMER wakeup for standby mode. This crash occurred during context restore when restoring values to TIOCP_CFG and TISTAT registers in the function omap_timer_restore_context(). This issue was fixed in the mainline. So backporting it to fix the same] Signed-off-by: Jon Hunter <jon-hunter@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: ShankarMurthy, Akshay <akshay.s@ti.com> Signed-off-by: Satyanarayana Sandhya <sandhya.satyanarayana@ti.com>
Showing 2 changed files with 0 additions and 4 deletions Side-by-side Diff
arch/arm/plat-omap/dmtimer.c
| ... | ... | @@ -80,9 +80,6 @@ |
| 80 | 80 | |
| 81 | 81 | static void omap_timer_restore_context(struct omap_dm_timer *timer) |
| 82 | 82 | { |
| 83 | - if (timer->revision > 1) | |
| 84 | - __raw_writel(timer->context.tistat, timer->sys_stat); | |
| 85 | - | |
| 86 | 83 | __raw_writel(timer->context.tisr, timer->irq_stat); |
| 87 | 84 | omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, |
| 88 | 85 | timer->context.twer); |