[PATCH 4/4] fsi: Aspeed master: Set bus frequency from devicetree
From: Eddie James <eajames@linux.ibm.com>
Date: 2020-09-10 15:40:25
Also in:
linux-aspeed, linux-clk, lkml
Subsystem:
fsi subsystem, the rest · Maintainers:
Eddie James, Linus Torvalds
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