6.8-stable review patch. If anyone has any objections, please let me know.
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From: Catalin Popescu catalin.popescu@leica-geosystems.com
[ Upstream commit 1758c68c81b8b881818fcebaaeb91055362a82f8 ]
According to 9FGV0241, 9FGV0441 & 9FGV0841 datasheets, the default value for the clock amplitude is 0.8V, while the driver assumes 0.7V.
Additionally, define constants for default values for both clock amplitude and spread spectrum and use them.
Fixes: 892e0ddea1aa ("clk: rs9: Add Renesas 9-series PCIe clock generator driver") Signed-off-by: Catalin Popescu catalin.popescu@leica-geosystems.com Reviewed-by: Marek Vasut marex@denx.de Link: https://lore.kernel.org/r/20240415140348.2887619-1-catalin.popescu@leica-geo... Signed-off-by: Stephen Boyd sboyd@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/clk/clk-renesas-pcie.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/clk/clk-renesas-pcie.c b/drivers/clk/clk-renesas-pcie.c index 53e21ac302e6d..4c3a5e4eb77ac 100644 --- a/drivers/clk/clk-renesas-pcie.c +++ b/drivers/clk/clk-renesas-pcie.c @@ -25,10 +25,12 @@ #define RS9_REG_SS_AMP_0V7 0x1 #define RS9_REG_SS_AMP_0V8 0x2 #define RS9_REG_SS_AMP_0V9 0x3 +#define RS9_REG_SS_AMP_DEFAULT RS9_REG_SS_AMP_0V8 #define RS9_REG_SS_AMP_MASK 0x3 #define RS9_REG_SS_SSC_100 0 #define RS9_REG_SS_SSC_M025 (1 << 3) #define RS9_REG_SS_SSC_M050 (3 << 3) +#define RS9_REG_SS_SSC_DEFAULT RS9_REG_SS_SSC_100 #define RS9_REG_SS_SSC_MASK (3 << 3) #define RS9_REG_SS_SSC_LOCK BIT(5) #define RS9_REG_SR 0x2 @@ -205,8 +207,8 @@ static int rs9_get_common_config(struct rs9_driver_data *rs9) int ret;
/* Set defaults */ - rs9->pll_amplitude = RS9_REG_SS_AMP_0V7; - rs9->pll_ssc = RS9_REG_SS_SSC_100; + rs9->pll_amplitude = RS9_REG_SS_AMP_DEFAULT; + rs9->pll_ssc = RS9_REG_SS_SSC_DEFAULT;
/* Output clock amplitude */ ret = of_property_read_u32(np, "renesas,out-amplitude-microvolt", @@ -247,13 +249,13 @@ static void rs9_update_config(struct rs9_driver_data *rs9) int i;
/* If amplitude is non-default, update it. */ - if (rs9->pll_amplitude != RS9_REG_SS_AMP_0V7) { + if (rs9->pll_amplitude != RS9_REG_SS_AMP_DEFAULT) { regmap_update_bits(rs9->regmap, RS9_REG_SS, RS9_REG_SS_AMP_MASK, rs9->pll_amplitude); }
/* If SSC is non-default, update it. */ - if (rs9->pll_ssc != RS9_REG_SS_SSC_100) { + if (rs9->pll_ssc != RS9_REG_SS_SSC_DEFAULT) { regmap_update_bits(rs9->regmap, RS9_REG_SS, RS9_REG_SS_SSC_MASK, rs9->pll_ssc); }