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clk: cs2000-cp: freeze config during register fiddling

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Make sure to freeze the configuration of the chip during the programming
of 32-bit registers. This avoids the processing of invalid intermediate
states.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Link: https://lore.kernel.org/r/20220125093336.226787-9-daniel@zonque.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Daniel Mack 2022-01-25 10:33:35 +01:00 committed by Stephen Boyd
parent b836882586
commit 2f3d32fe9d
1 changed files with 9 additions and 0 deletions
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9
drivers/clk/clk-cs2000-cp.c
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@ -52,6 +52,7 @@
#define FRACNSRC_DYNAMIC (1 << 0)
/* GLOBAL_CFG */
#define FREEZE (1 << 7)
#define ENDEV2 (0x1)
/* FUNC_CFG1 */
@ -335,6 +336,10 @@ static int __cs2000_set_rate(struct cs2000_priv *priv, int ch,
{
int ret;
ret = cs2000_bset(priv, GLOBAL_CFG, FREEZE, FREEZE);
if (ret < 0)
return ret;
ret = cs2000_select_ratio_mode(priv, rate, parent_rate);
if (ret < 0)
return ret;
@ -347,6 +352,10 @@ static int __cs2000_set_rate(struct cs2000_priv *priv, int ch,
if (ret < 0)
return ret;
ret = cs2000_bset(priv, GLOBAL_CFG, FREEZE, 0);
if (ret < 0)
return ret;
priv->saved_rate = rate;
priv->saved_parent_rate = parent_rate;