// SPDX-License-Identifier: GPL-2.0 /* * Xilinx VCU Init * * Copyright (C) 2016 - 2017 Xilinx, Inc. * * Contacts Dhaval Shah <[email protected]> */ #include <linux/bitfield.h> #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/device.h> #include <linux/errno.h> #include <linux/io.h> #include <linux/mfd/syscon.h> #include <linux/mfd/syscon/xlnx-vcu.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <dt-bindings/clock/xlnx-vcu.h> #define VCU_PLL_CTRL … #define VCU_PLL_CTRL_RESET … #define VCU_PLL_CTRL_POR_IN … #define VCU_PLL_CTRL_PWR_POR … #define VCU_PLL_CTRL_BYPASS … #define VCU_PLL_CTRL_FBDIV … #define VCU_PLL_CTRL_CLKOUTDIV … #define VCU_PLL_CFG … #define VCU_PLL_CFG_RES … #define VCU_PLL_CFG_CP … #define VCU_PLL_CFG_LFHF … #define VCU_PLL_CFG_LOCK_CNT … #define VCU_PLL_CFG_LOCK_DLY … #define VCU_ENC_CORE_CTRL … #define VCU_ENC_MCU_CTRL … #define VCU_DEC_CORE_CTRL … #define VCU_DEC_MCU_CTRL … #define VCU_PLL_STATUS … #define VCU_PLL_STATUS_LOCK_STATUS … #define MHZ … #define FVCO_MIN … #define FVCO_MAX … /** * struct xvcu_device - Xilinx VCU init device structure * @dev: Platform device * @pll_ref: pll ref clock source * @aclk: axi clock source * @logicore_reg_ba: logicore reg base address * @vcu_slcr_ba: vcu_slcr Register base address * @pll: handle for the VCU PLL * @pll_post: handle for the VCU PLL post divider * @clk_data: clocks provided by the vcu clock provider */ struct xvcu_device { … }; static const struct regmap_config vcu_settings_regmap_config = …; /** * struct xvcu_pll_cfg - Helper data * @fbdiv: The integer portion of the feedback divider to the PLL * @cp: PLL charge pump control * @res: PLL loop filter resistor control * @lfhf: PLL loop filter high frequency capacitor control * @lock_dly: Lock circuit configuration settings for lock windowsize * @lock_cnt: Lock circuit counter setting */ struct xvcu_pll_cfg { … }; static const struct xvcu_pll_cfg xvcu_pll_cfg[] = …; /** * xvcu_read - Read from the VCU register space * @iomem: vcu reg space base address * @offset: vcu reg offset from base * * Return: Returns 32bit value from VCU register specified * */ static inline u32 xvcu_read(void __iomem *iomem, u32 offset) { … } /** * xvcu_write - Write to the VCU register space * @iomem: vcu reg space base address * @offset: vcu reg offset from base * @value: Value to write */ static inline void xvcu_write(void __iomem *iomem, u32 offset, u32 value) { … } #define to_vcu_pll(_hw) … struct vcu_pll { … }; static int xvcu_pll_wait_for_lock(struct vcu_pll *pll) { … } static struct clk_hw *xvcu_register_pll_post(struct device *dev, const char *name, const struct clk_hw *parent_hw, void __iomem *reg_base) { … } static const struct xvcu_pll_cfg *xvcu_find_cfg(int div) { … } static int xvcu_pll_set_div(struct vcu_pll *pll, int div) { … } static long xvcu_pll_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate) { … } static unsigned long xvcu_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { … } static int xvcu_pll_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate) { … } static int xvcu_pll_enable(struct clk_hw *hw) { … } static void xvcu_pll_disable(struct clk_hw *hw) { … } static const struct clk_ops vcu_pll_ops = …; static struct clk_hw *xvcu_register_pll(struct device *dev, void __iomem *reg_base, const char *name, const char *parent, unsigned long flags) { … } static struct clk_hw *xvcu_clk_hw_register_leaf(struct device *dev, const char *name, const struct clk_parent_data *parent_data, u8 num_parents, void __iomem *reg) { … } static void xvcu_clk_hw_unregister_leaf(struct clk_hw *hw) { … } static int xvcu_register_clock_provider(struct xvcu_device *xvcu) { … } static void xvcu_unregister_clock_provider(struct xvcu_device *xvcu) { … } /** * xvcu_probe - Probe existence of the logicoreIP * and initialize PLL * * @pdev: Pointer to the platform_device structure * * Return: Returns 0 on success * Negative error code otherwise */ static int xvcu_probe(struct platform_device *pdev) { … } /** * xvcu_remove - Insert gasket isolation * and disable the clock * @pdev: Pointer to the platform_device structure * * Return: Returns 0 on success * Negative error code otherwise */ static void xvcu_remove(struct platform_device *pdev) { … } static const struct of_device_id xvcu_of_id_table[] = …; MODULE_DEVICE_TABLE(of, xvcu_of_id_table); static struct platform_driver xvcu_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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