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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