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drivers: qcom: rpmh-rsc: Check cmd_db_ready() to help children 

Children of RPMh will need access to cmd_db.  Rather than having each
child have code to check if cmd_db is ready let's add the check to
RPMh.

With this we'll be able to remove this boilerplate code from
clk-rpmh.c and qcom-rpmh-regulator.c.  Neither of these files has
landed upstream yet but patches are pretty far along.

===
This code is based upon v11 of Lina and Raju's RPMh series.

Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Lina Iyer <ilina@codeaurora.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
This commit is contained in:
Douglas Anderson 2018-06-18 11:36:52 -07:00 committed by Andy Gross
parent 2de4b8d33e
commit fdd102b52c
1 changed files with 13 additions and 0 deletions
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13
drivers/soc/qcom/rpmh-rsc.c
View File

@ -18,6 +18,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <soc/qcom/cmd-db.h>
#include <soc/qcom/tcs.h>
#include <dt-bindings/soc/qcom,rpmh-rsc.h>
@ -621,6 +622,18 @@ static int rpmh_rsc_probe(struct platform_device *pdev)
struct rsc_drv *drv;
int ret, irq;
/*
* Even though RPMh doesn't directly use cmd-db, all of its children
* do. To avoid adding this check to our children we'll do it now.
*/
ret = cmd_db_ready();
if (ret) {
if (ret != -EPROBE_DEFER)
dev_err(&pdev->dev, "Command DB not available (%d)\n",
ret);
return ret;
}
drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
if (!drv)
return -ENOMEM;