From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Russell King <linux@armlinux.org.uk>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ulf Hansson <ulf.hansson@linaro.org>
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Subject: [RESEND PATCH] amba: Allow pclk to be controlled by power domain
Date: Wed, 30 Jan 2019 18:01:41 -0800 [thread overview]
Message-ID: <20190131020141.28352-1-bjorn.andersson@linaro.org> (raw)
On the Qualcomm SDM845 platform the apb_pclk is controlled as part of
the QDSS power/clock domain. Handle this by allowing amba to operate
without direct apb_pclk control, when a powerdomain is attached and no
clock is described.
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
Resending this separate from the series it was originally part of.
drivers/amba/bus.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 41b706403ef7..3e13050c6d59 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -219,8 +219,13 @@ static int amba_get_enable_pclk(struct amba_device *pcdev)
int ret;
pcdev->pclk = clk_get(&pcdev->dev, "apb_pclk");
- if (IS_ERR(pcdev->pclk))
- return PTR_ERR(pcdev->pclk);
+ if (IS_ERR(pcdev->pclk)) {
+ /* Continue with no clock specified, but pm_domain attached */
+ if (PTR_ERR(pcdev->pclk) == -ENOENT && pcdev->dev.pm_domain)
+ pcdev->pclk = NULL;
+ else
+ return PTR_ERR(pcdev->pclk);
+ }
ret = clk_prepare_enable(pcdev->pclk);
if (ret)
--
2.18.0
next reply other threads:[~2019-01-31 2:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-31 2:01 Bjorn Andersson [this message]
2019-01-31 10:32 ` Sai Prakash Ranjan
2019-02-05 14:58 ` Ulf Hansson
2019-02-19 6:43 ` Bjorn Andersson
2019-02-21 7:55 ` Ulf Hansson
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