Re: [PATCH] clk: imx: pll14xx: fix recalc_rate for negative kdiv
From: Abel Vesa <hidden>
Date: 2023-02-15 12:24:24
Also in:
linux-clk, lkml
On 22-12-10 15:38:35, Kevin Groeneveld wrote:
kdiv is a signed 16 bit value in the DEV_CTL1 register. Commit
53990cf9d5b4 ("clk: imx: pll14xx: consolidate rate calculation") changed
the kdiv variable from a short int to just int. When the value read from
the DIV_CTL1 register is assigned directly to an int the sign of the value
is lost resulting in incorrect results when the value is negative. Adding
a s16 cast to the register value fixes the issue.
Fixes: 53990cf9d5b4 ("clk: imx: pll14xx: consolidate rate calculation")
Signed-off-by: Kevin Groeneveld <redacted>Reviewed-by: Abel Vesa <redacted> Stephen, can you pick this up through fixes?
quoted hunk ↗ jump to hunk
--- drivers/clk/imx/clk-pll14xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c index 1d0f79e9c346..d12194d17b10 100644 --- a/drivers/clk/imx/clk-pll14xx.c +++ b/drivers/clk/imx/clk-pll14xx.c@@ -254,7 +254,7 @@ static unsigned long clk_pll14xx_recalc_rate(struct clk_hw *hw, if (pll->type == PLL_1443X) { pll_div_ctl1 = readl_relaxed(pll->base + DIV_CTL1); - kdiv = FIELD_GET(KDIV_MASK, pll_div_ctl1); + kdiv = (s16)FIELD_GET(KDIV_MASK, pll_div_ctl1); } else { kdiv = 0; }-- 2.17.1
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