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| author | Juan Gutierrez <jgutierrez@ti.com> | 2011-08-19 12:33:21 -0500 |
|---|---|---|
| committer | Ziyann <jaraidaniel@gmail.com> | 2014-10-01 12:57:05 +0200 |
| commit | 6373f77903faf1da8d7ca9b8a1c6d8d7bea358b3 (patch) | |
| tree | 8f99ee2ee713920370db826f16d08dd01b0ec130 /drivers/remoteproc | |
| parent | 812a42bd9cdcc3fba0041b113633ae62c9178624 (diff) | |
| download | kernel_samsung_tuna-6373f77903faf1da8d7ca9b8a1c6d8d7bea358b3.tar.gz kernel_samsung_tuna-6373f77903faf1da8d7ca9b8a1c6d8d7bea358b3.tar.bz2 kernel_samsung_tuna-6373f77903faf1da8d7ca9b8a1c6d8d7bea358b3.zip | |
omap: remoteproc: add support for a boot register
Some remote processors (like DSP) need to explicitly configure
a boot address in a special register or memory location, and
this is the address from which they start executing code when
taken out of reset.
Support for this infrastructure has been added to remoteproc
code. The memory or register address where the boot address
is to be stored is supplied through the boot_reg field of the
platform data in the remoteproc. The omap_rproc_start function
will fetch the boot address from the image, and write this
address into the boot register, if provided, before taking the
processor out of reset.
Change-Id: I4efc5824791eda6e23e5d568f4568a3fe3d0014b
Signed-off-by: Juan Gutierrez <jgutierrez@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/omap_remoteproc.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c index 5279293b92e..3f24db84fa8 100644 --- a/drivers/remoteproc/omap_remoteproc.c +++ b/drivers/remoteproc/omap_remoteproc.c @@ -437,6 +437,16 @@ static irqreturn_t omap_rproc_watchdog_isr(int irq, void *p) return IRQ_HANDLED; } #endif + +static inline void _load_boot_addr(struct rproc *rproc, u64 bootaddr) +{ + struct omap_rproc_pdata *pdata = rproc->dev->platform_data; + + if (pdata->boot_reg) + omap_writel(bootaddr, pdata->boot_reg); + return; +} + static inline int omap_rproc_start(struct rproc *rproc, u64 bootaddr) { struct device *dev = rproc->dev; @@ -457,8 +467,11 @@ static inline int omap_rproc_start(struct rproc *rproc, u64 bootaddr) } #ifdef CONFIG_REMOTE_PROC_AUTOSUSPEND - _init_pm_flags(rproc); + ret = _init_pm_flags(rproc); + if (ret) + return ret; #endif + for (i = 0; i < pdata->timers_cnt; i++) { timers[i].odt = omap_dm_timer_request_specific(timers[i].id); if (!timers[i].odt) { @@ -478,6 +491,7 @@ static inline int omap_rproc_start(struct rproc *rproc, u64 bootaddr) #endif } + _load_boot_addr(rproc, bootaddr); ret = omap_device_enable(pdev); out: if (ret) { |