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From:   Shawn Guo <shawn.guo@linaro.org>
To:     Jassi Brar <jassisinghbrar@gmail.com>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Sivaprakash Murugesan <sivaprak@codeaurora.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Benjamin Li <benl@squareup.com>, devicetree@vger.kernel.org,
        linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
        Shawn Guo <shawn.guo@linaro.org>
Subject: [PATCH v3 2/3] mailbox: qcom: Use PLATFORM_DEVID_AUTO to register platform device
Date:   Tue, 22 Jun 2021 08:39:18 +0800
Message-Id: <20210622003919.10442-3-shawn.guo@linaro.org>
In-Reply-To: <20210622003919.10442-1-shawn.guo@linaro.org>
References: <20210622003919.10442-1-shawn.guo@linaro.org>
Precedence: bulk

In adding APCS clock support for MSM8939, the second clock registration
fails due to duplicate device name like below.

[    0.519657] sysfs: cannot create duplicate filename '/bus/platform/devices/qcom-apcs-msm8916-clk'
...
[    0.661158] qcom_apcs_ipc b111000.mailbox: failed to register APCS clk

This is because MSM8939 has 3 APCS instances for Cluster0 (little cores),
Cluster1 (big cores) and CCI (Cache Coherent Interconnect).  Although
only APCS of Cluster0 and Cluster1 have IPC bits, each of 3 APCS has
A53PLL clock control bits.  That said, 3 'qcom-apcs-msm8916-clk' devices
need to be registered to instantiate all 3 clocks.  Use PLATFORM_DEVID_AUTO
rather than PLATFORM_DEVID_NONE for platform_device_register_data() call
to fix the issue above.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/mailbox/qcom-apcs-ipc-mailbox.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mailbox/qcom-apcs-ipc-mailbox.c b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
index f25324d03842..15236d729625 100644
--- a/drivers/mailbox/qcom-apcs-ipc-mailbox.c
+++ b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
@@ -132,7 +132,7 @@ static int qcom_apcs_ipc_probe(struct platform_device *pdev)
 	if (apcs_data->clk_name) {
 		apcs->clk = platform_device_register_data(&pdev->dev,
 							  apcs_data->clk_name,
-							  PLATFORM_DEVID_NONE,
+							  PLATFORM_DEVID_AUTO,
 							  NULL, 0);
 		if (IS_ERR(apcs->clk))
 			dev_err(&pdev->dev, "failed to register APCS clk\n");
-- 
2.17.1