From: Eddie James <eajames@linux.ibm.com>
To: linux-clk@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-aspeed@lists.ozlabs.org, linux-fsi@lists.ozlabs.org,
andrew@aj.id.au, joel@jms.id.au, robh+dt@kernel.org,
sboyd@kernel.org, mturquette@baylibre.com, alistair@popple.id.au,
jk@ozlabs.org
Subject: [PATCH 4/4] fsi: Aspeed master: Set bus frequency from devicetree
Date: Thu, 10 Sep 2020 10:18:40 -0500 [thread overview]
Message-ID: <20200910151840.25333-5-eajames@linux.ibm.com> (raw)
In-Reply-To: <20200910151840.25333-1-eajames@linux.ibm.com>
Set the FSI bus frequency based on the value encoded in the
devicetree. The default value is 166MHz, which is the highest
frequency some FSI slaves can accept.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
---
drivers/fsi/fsi-master-aspeed.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/fsi/fsi-master-aspeed.c b/drivers/fsi/fsi-master-aspeed.c
index c006ec008a1a..be19fee0bece 100644
--- a/drivers/fsi/fsi-master-aspeed.c
+++ b/drivers/fsi/fsi-master-aspeed.c
@@ -515,6 +515,7 @@ static int fsi_master_aspeed_probe(struct platform_device *pdev)
struct fsi_master_aspeed *aspeed;
struct resource *res;
int rc, links, reg;
+ u32 bus_freq = 166666666;
__be32 raw;
rc = tacoma_cabled_fsi_fixup(&pdev->dev);
@@ -539,6 +540,10 @@ static int fsi_master_aspeed_probe(struct platform_device *pdev)
dev_err(aspeed->dev, "couldn't get clock\n");
return PTR_ERR(aspeed->clk);
}
+
+ of_property_read_u32(pdev->dev.of_node, "bus-frequency", &bus_freq);
+ clk_set_rate(aspeed->clk, bus_freq);
+
rc = clk_prepare_enable(aspeed->clk);
if (rc) {
dev_err(aspeed->dev, "couldn't enable clock\n");
--
2.26.2
prev parent reply other threads:[~2020-09-10 15:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 15:18 [PATCH 0/4] clk: AST2600 and FSI: Add APLL to control FSI bus frequency Eddie James
2020-09-10 15:18 ` [PATCH 1/4] dt-bindings: clock: Add AST2600 APLLdivN definition Eddie James
2020-09-11 1:33 ` Joel Stanley
2020-09-10 15:18 ` [PATCH 2/4] clk: ast2600: Add functionality to the APLL clock Eddie James
2020-09-11 1:29 ` Joel Stanley
2020-09-11 9:11 ` Ryan Chen
2020-09-10 15:18 ` [PATCH 3/4] dt-bindings: fsi: Aspeed master: Add bus-frequency property Eddie James
2020-09-11 1:16 ` Joel Stanley
2020-09-22 22:19 ` Rob Herring
2020-09-10 15:18 ` Eddie James [this message]
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