5.15-stable review patch. If anyone has any objections, please let me know.
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From: Ryan Wanner Ryan.Wanner@microchip.com
[ Upstream commit e0237f5635727d64635ec6665e1de9f4cacce35c ]
A potential divider for the master clock is div/3. The register configuration for div/3 is MASTER_PRES_MAX. The current bit shifting method does not work for this case. Checking for MASTER_PRES_MAX will ensure the correct decimal value is stored in the system.
Signed-off-by: Ryan Wanner Ryan.Wanner@microchip.com Signed-off-by: Nicolas Ferre nicolas.ferre@microchip.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/at91/clk-master.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c index 04d0dd8385945..3f4a071e4dab4 100644 --- a/drivers/clk/at91/clk-master.c +++ b/drivers/clk/at91/clk-master.c @@ -437,6 +437,9 @@ clk_sama7g5_master_recalc_rate(struct clk_hw *hw, { struct clk_master *master = to_clk_master(hw);
+ if (master->div == MASTER_PRES_MAX) + return DIV_ROUND_CLOSEST_ULL(parent_rate, 3); + return DIV_ROUND_CLOSEST_ULL(parent_rate, (1 << master->div)); }