diff options
Diffstat (limited to 'drivers/mtd/nand/raw/mxs_nand.c')
| -rw-r--r-- | drivers/mtd/nand/raw/mxs_nand.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/mxs_nand.c b/drivers/mtd/nand/raw/mxs_nand.c index 80d9307cdd1..ba67466069b 100644 --- a/drivers/mtd/nand/raw/mxs_nand.c +++ b/drivers/mtd/nand/raw/mxs_nand.c @@ -1507,8 +1507,18 @@ static void mxs_compute_timings(struct nand_chip *chip, writel(GPMI_CTRL1_CLEAR_MASK, &nand_info->gpmi_regs->hw_gpmi_ctrl1_clr); writel(ctrl1n, &nand_info->gpmi_regs->hw_gpmi_ctrl1_set); + /* Clock dividers do NOT guarantee a clean clock signal on its output + * during the change of the divide factor on i.MX6Q/UL/SX. On i.MX7/8, + * all clock dividers provide these guarantee. + */ + if (IS_ENABLED(CONFIG_MX6ULL)) + clk_disable(nand_info->gpmi_clk); + clk_set_rate(nand_info->gpmi_clk, clk_rate); + if (IS_ENABLED(CONFIG_MX6ULL)) + clk_enable(nand_info->gpmi_clk); + /* Wait 64 clock cycles before using the GPMI after enabling the DLL */ dll_wait_time_us = USEC_PER_SEC / clk_rate * 64; if (!dll_wait_time_us) |