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Numerator is a signed number. It has feature to adjust fractional portion of feedback divider dynamically. This fracn gppll is used in i.MX93. Signed-off-by: Peng Fan --- drivers/clk/imx/Makefile | 1 + drivers/clk/imx/clk-fracn-gppll.c | 328 ++++++++++++++++++++++++++++++ drivers/clk/imx/clk.h | 21 ++ 3 files changed, 350 insertions(+) create mode 100644 drivers/clk/imx/clk-fracn-gppll.c diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile index 36c04922d789..60c8a4bb7574 100644 --- a/drivers/clk/imx/Makefile +++ b/drivers/clk/imx/Makefile @@ -5,6 +5,7 @@ mxc-clk-objs += clk-busy.o mxc-clk-objs += clk-composite-7ulp.o mxc-clk-objs += clk-composite-8m.o mxc-clk-objs += clk-composite-93.o +mxc-clk-objs += clk-fracn-gppll.o mxc-clk-objs += clk-cpu.o mxc-clk-objs += clk-divider-gate.o mxc-clk-objs += clk-fixup-div.o diff --git a/drivers/clk/imx/clk-fracn-gppll.c b/drivers/clk/imx/clk-fracn-gppll.c new file mode 100644 index 000000000000..6c9946a4bdb7 --- /dev/null +++ b/drivers/clk/imx/clk-fracn-gppll.c @@ -0,0 +1,328 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2021 NXP + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "clk.h" + +#define PLL_CTRL 0x0 +#define CLKMUX_BYPASS BIT(2) +#define CLKMUX_EN BIT(1) +#define POWERUP_MASK BIT(0) + +#define PLL_ANA_PRG 0x10 +#define PLL_SPREAD_SPECTRUM 0x30 + +#define PLL_NUMERATOR 0x40 +#define PLL_MFN_MASK GENMASK(31, 2) +#define PLL_MFN_SHIFT 2 + +#define PLL_DENOMINATOR 0x50 +#define PLL_MFD_MASK GENMASK(29, 0) + +#define PLL_DIV 0x60 +#define PLL_MFI_MASK GENMASK(24, 16) +#define PLL_MFI_SHIFT 16 +#define PLL_RDIV_MASK GENMASK(15, 13) +#define PLL_RDIV_SHIFT 13 +#define PLL_ODIV_MASK GENMASK(7, 0) + +#define PLL_DFS_CTRL(x) (0x70 + (x) * 0x10) + +#define PLL_STATUS 0xF0 +#define LOCK_STATUS BIT(0) + +#define DFS_STATUS 0xF4 + +#define LOCK_TIMEOUT_US 200 + +#define PLL_FRACN_GP(_rate, _mfi, _mfn, _mfd, _rdiv, _odiv) \ + { \ + .rate = (_rate), \ + .mfi = (_mfi), \ + .mfn = (_mfn), \ + .mfd = (_mfd), \ + .rdiv = (_rdiv), \ + .odiv = (_odiv), \ + } + +struct clk_fracn_gppll { + struct clk_hw hw; + void __iomem *base; + const struct imx_fracn_gppll_rate_table *rate_table; + int rate_count; +}; + +#define to_clk_fracn_gppll(_hw) container_of(_hw, struct clk_fracn_gppll, hw) + +/* + * Fvco =