[PATCH 5.11 356/601] clk: zynqmp: move zynqmp_pll_set_mode out of round_rate callback

Greg Kroah-Hartman
2021-05-12T17:39:25Z

From: Quanyang Wang <quanyang.wang@windriver.com>

[ Upstream commit d7fd3f9f53df8bb2212dff70f66f12cae0e1a653 ]

The round_rate callback should only perform rate calculation and not
involve calling zynqmp_pll_set_mode to change the pll mode. So let's
move zynqmp_pll_set_mode out of round_rate and to set_rate callback.

Fixes: 3fde0e16d016 ("drivers: clk: Add ZynqMP clock driver")
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Link: https://lore.kernel.org/r/20210406154015.602779-1-quanyang.wang@windriver.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/clk/zynqmp/pll.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/zynqmp/pll.c b/drivers/clk/zynqmp/pll.c
index 92f449ed38e5..03bfe62c1e62 100644
--- a/drivers/clk/zynqmp/pll.c
+++ b/drivers/clk/zynqmp/pll.c
@@ -100,9 +100,7 @@ static long zynqmp_pll_round_rate(struct clk_hw *hw, unsigned long rate,
/* Enable the fractional mode if needed */
rate_div = (rate * FRAC_DIV) / *prate;
f = rate_div % FRAC_DIV;
- zynqmp_pll_set_mode(hw, !!f);
-
- if (zynqmp_pll_get_mode(hw) == PLL_MODE_FRAC) {
+ if (f) {
if (rate > PS_PLL_VCO_MAX) {
fbdiv = rate / PS_PLL_VCO_MAX;
rate = rate / (fbdiv + 1);
@@ -173,10 +171,12 @@ static int zynqmp_pll_set_rate(struct clk_hw *hw, unsigned long rate,
long rate_div, frac, m, f;
int ret;

- if (zynqmp_pll_get_mode(hw) == PLL_MODE_FRAC) {
- rate_div = (rate * FRAC_DIV) / parent_rate;
+ rate_div = (rate * FRAC_DIV) / parent_rate;
+ f = rate_div % FRAC_DIV;
+ zynqmp_pll_set_mode(hw, !!f);
+
+ if (f) {
m = rate_div / FRAC_DIV;
- f = rate_div % FRAC_DIV;
m = clamp_t(u32, m, (PLL_FBDIV_MIN), (PLL_FBDIV_MAX));
rate = parent_rate * m;
frac = (parent_rate * f) / FRAC_DIV;
--
2.30.2