Before reparenting the ENFC_SEL mux we have to make sure the GPMI_IO clk is disabled as recommended in the reference manual. Otherwise glitches may occur on the GPMI clk which result in a later NAND failure: MXS: Timeout resetting block via register 0x01806000 mxs_nand 1806000.gpmi-nand@xxxxxxxxxx: probe failed: Connection timed out Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- drivers/clk/imx/clk-imx6ul.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/clk/imx/clk-imx6ul.c b/drivers/clk/imx/clk-imx6ul.c index b0a6bb0e8d..35483efde6 100644 --- a/drivers/clk/imx/clk-imx6ul.c +++ b/drivers/clk/imx/clk-imx6ul.c @@ -450,6 +450,9 @@ static int imx6_ccm_probe(struct device_d *dev) clk_set_parent(clks[IMX6ULL_CLK_EPDC_PRE_SEL], clks[IMX6UL_CLK_PLL3_PFD2]); + /* Disable GPMI_IO clk before reparenting to avoid glitches */ + clks[IMX6UL_CLK_GPMI_IO]->ops->disable(clks[IMX6UL_CLK_GPMI_IO]); + clk_set_parent(clks[IMX6UL_CLK_ENFC_SEL], clks[IMX6UL_CLK_PLL2_PFD2]); return 0; -- 2.24.0 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
