| Message ID | 1385414121-21493-3-git-send-email-mkl@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/arch/arm/mach-imx/clk-imx51-imx53.c b/arch/arm/mach-imx/clk-imx51-imx53.c index e349fd5..dff5ca9 100644 --- a/arch/arm/mach-imx/clk-imx51-imx53.c +++ b/arch/arm/mach-imx/clk-imx51-imx53.c @@ -584,6 +584,9 @@ static void __init mx53_clocks_init(struct device_node *np) clk_set_rate(clk[IMX5_CLK_ESDHC_A_PODF], 200000000); clk_set_rate(clk[IMX5_CLK_ESDHC_B_PODF], 200000000); + /* move can bus clk to 24MHz */ + clk_set_parent(clk[IMX5_CLK_CAN_SEL], clk[IMX5_CLK_LP_APM]); + clk_prepare_enable(clk[IMX5_CLK_IIM_GATE]); imx_print_silicon_rev("i.MX53", mx53_revision()); clk_disable_unprepare(clk[IMX5_CLK_IIM_GATE]);
This patch sets the parent of CAN peripheral clock (a.k.a. CPI clock) to the lp_apm clock, which has a rate of 24 MHz. In the CAN world a base clock with multiple of 8 MHz is suited best for all CIA recommented bit rates. Without this patch the CAN peripheral clock on i.MX53 has a rate of 66.666 MHz which produces quite large bit rate errors. Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> --- arch/arm/mach-imx/clk-imx51-imx53.c | 3 +++ 1 file changed, 3 insertions(+)