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- From 1a3e5173f5e72cbf7f0c8927b33082e361c16d72 Mon Sep 17 00:00:00 2001
- From: Marc Kleine-Budde <[email protected]>
- Date: Mon, 25 Nov 2013 22:15:20 +0100
- Subject: [PATCH] can: flexcan: use correct clock as base for bit rate
- calculation
- The flexcan IP core uses the peripheral clock ("per") as basic clock for the
- bit timing calculation. However the driver uses the the wrong clock ("ipg").
- This leads to wrong bit rates if the rates on both clock are different.
- This patch fixes the problem by using the correct clock for the bit rate
- calculation.
- Cc: linux-stable <[email protected]>
- Signed-off-by: Marc Kleine-Budde <[email protected]>
- ---
- drivers/net/can/flexcan.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
- --- a/drivers/net/can/flexcan.c
- +++ b/drivers/net/can/flexcan.c
- @@ -1021,7 +1021,6 @@ static int flexcan_probe(struct platform
- err = PTR_ERR(clk_ipg);
- goto failed_clock;
- }
- - clock_freq = clk_get_rate(clk_ipg);
-
- clk_per = devm_clk_get(&pdev->dev, "per");
- if (IS_ERR(clk_per)) {
- @@ -1029,6 +1028,7 @@ static int flexcan_probe(struct platform
- err = PTR_ERR(clk_per);
- goto failed_clock;
- }
- + clock_freq = clk_get_rate(clk_per);
- }
-
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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