diff options
Diffstat (limited to 'drivers/clk/ti/clk-k3-pll.c')
| -rw-r--r-- | drivers/clk/ti/clk-k3-pll.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/clk/ti/clk-k3-pll.c b/drivers/clk/ti/clk-k3-pll.c index bf2407a020..bf762c558e 100644 --- a/drivers/clk/ti/clk-k3-pll.c +++ b/drivers/clk/ti/clk-k3-pll.c @@ -2,7 +2,7 @@ /* * Texas Instruments K3 SoC PLL clock driver * - * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/ + * Copyright (C) 2020-2021 Texas Instruments Incorporated - http://www.ti.com/ * Tero Kristo <t-kristo@ti.com> */ @@ -122,6 +122,7 @@ static ulong ti_pll_clk_set_rate(struct clk *clk, ulong rate) unsigned long pllm; u32 pllfm = 0; unsigned long plld; + u32 div_ctrl; u32 rem; int shift; @@ -175,7 +176,15 @@ static ulong ti_pll_clk_set_rate(struct clk *clk, ulong rate) writel(pllm, pll->reg + PLL_16FFT_FREQ_CTRL0); writel(pllfm, pll->reg + PLL_16FFT_FREQ_CTRL1); - writel(plld, pll->reg + PLL_16FFT_DIV_CTRL); + + /* + * div_ctrl register contains other divider values, so rmw + * only plld and leave existing values alone + */ + div_ctrl = readl(pll->reg + PLL_16FFT_DIV_CTRL); + div_ctrl &= ~PLL_16FFT_DIV_CTRL_REF_DIV_MASK; + div_ctrl |= plld; + writel(div_ctrl, pll->reg + PLL_16FFT_DIV_CTRL); ctrl &= ~PLL_16FFT_CTRL_BYPASS_EN; ctrl |= PLL_16FFT_CTRL_PLL_EN; |