[PATCH 3/4] mmc: sdhci-iproc: Set clock frequency as per DT

From: Nicolas Saenz Julienne <nsaenz@kernel.org>
To: linux-arm-kernel@lists.infradead.org, linux-mmc@vger.kernel.org,
	devicetree@vger.kernel.org,
	bcm-kernel-feedback-list@broadcom.com,
	linux-rpi-kernel@lists.infradead.org,
	Saenz Julienne <nsaenz@kernel.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	Ray Jui <rjui@broadcom.com>,
	Scott Branden <sbranden@broadcom.com>
Cc: f.fainelli@gmail.com, phil@raspberrypi.com,
	tim.gover@raspberrypi.com, alcooperx@gmail.com,
	nsaenzjulienne@suse.de, linux-kernel@vger.kernel.org,
	ulf.hansson@linaro.org
Subject: [PATCH 3/4] mmc: sdhci-iproc: Set clock frequency as per DT
Date: Mon, 22 Mar 2021 19:58:16 +0100	[thread overview]
Message-ID: <20210322185816.27582-4-nsaenz@kernel.org> (raw)
In-Reply-To: <20210322185816.27582-1-nsaenz@kernel.org>

From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

devicetree might request a clock frequency different from whatever is
set-up by the bootloader. Make sure to setup the new rate.

Signed-off-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
---
 drivers/mmc/host/sdhci-iproc.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
index ddeaf8e1f72f..536c382e2486 100644
--- a/drivers/mmc/host/sdhci-iproc.c
+++ b/drivers/mmc/host/sdhci-iproc.c
@@ -358,6 +358,16 @@ static int sdhci_iproc_probe(struct platform_device *pdev)
 			ret = PTR_ERR(pltfm_host->clk);
 			goto err;
 		}
+
+		if (pltfm_host->clock) {
+			ret = clk_set_rate(pltfm_host->clk, pltfm_host->clock);
+			if (ret) {
+				dev_err(dev, "failed to set host clk at %u Hz\n",
+					pltfm_host->clock);
+				goto err;
+			}
+		}
+
 		ret = clk_prepare_enable(pltfm_host->clk);
 		if (ret) {
 			dev_err(dev, "failed to enable host clk\n");
-- 
2.30.2

