From: Peng Fan peng.fan@nxp.com
[ Upstream commit 4435467b15b069e5a6f50ca9a9260e86b74dbc13 ]
When programming PLL, should disable Hardware control select to make PLL controlled by register, not hardware inputs through OSCPLL.
Fixes: 1b26cb8a77a4 ("clk: imx: support fracn gppll") Signed-off-by: Peng Fan peng.fan@nxp.com Reviewed-by: Abel Vesa abel.vesa@linaro.org Link: https://lore.kernel.org/r/20230403095300.3386988-3-peng.fan@oss.nxp.com Signed-off-by: Abel Vesa abel.vesa@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/imx/clk-fracn-gppll.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/drivers/clk/imx/clk-fracn-gppll.c b/drivers/clk/imx/clk-fracn-gppll.c index ec50c41e2a4c9..f6674110a88e0 100644 --- a/drivers/clk/imx/clk-fracn-gppll.c +++ b/drivers/clk/imx/clk-fracn-gppll.c @@ -15,6 +15,7 @@ #include "clk.h"
#define PLL_CTRL 0x0 +#define HW_CTRL_SEL BIT(16) #define CLKMUX_BYPASS BIT(2) #define CLKMUX_EN BIT(1) #define POWERUP_MASK BIT(0) @@ -193,6 +194,11 @@ static int clk_fracn_gppll_set_rate(struct clk_hw *hw, unsigned long drate,
rate = imx_get_pll_settings(pll, drate);
+ /* Hardware control select disable. PLL is control by register */ + tmp = readl_relaxed(pll->base + PLL_CTRL); + tmp &= ~HW_CTRL_SEL; + writel_relaxed(tmp, pll->base + PLL_CTRL); + /* Disable output */ tmp = readl_relaxed(pll->base + PLL_CTRL); tmp &= ~CLKMUX_EN;