| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dhaval Shah | 2235 | 54.47% | 1 | 7.69% |
| Michael Tretter | 1864 | 45.43% | 10 | 76.92% |
| Christoph Hellwig | 2 | 0.05% | 1 | 7.69% |
| Uwe Kleine-König | 2 | 0.05% | 1 | 7.69% |
| Total | 4103 | 13 |
// SPDX-License-Identifier: GPL-2.0 /* * Xilinx VCU Init * * Copyright (C) 2016 - 2017 Xilinx, Inc. * * Contacts Dhaval Shah <dshah@xilinx.com> */ #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/of_platform.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <dt-bindings/clock/xlnx-vcu.h> #define VCU_PLL_CTRL 0x24 #define VCU_PLL_CTRL_RESET BIT(0) #define VCU_PLL_CTRL_POR_IN BIT(1) #define VCU_PLL_CTRL_PWR_POR BIT(2) #define VCU_PLL_CTRL_BYPASS BIT(3) #define VCU_PLL_CTRL_FBDIV GENMASK(14, 8) #define VCU_PLL_CTRL_CLKOUTDIV GENMASK(18, 16) #define VCU_PLL_CFG 0x28 #define VCU_PLL_CFG_RES GENMASK(3, 0) #define VCU_PLL_CFG_CP GENMASK(8, 5) #define VCU_PLL_CFG_LFHF GENMASK(12, 10) #define VCU_PLL_CFG_LOCK_CNT GENMASK(22, 13) #define VCU_PLL_CFG_LOCK_DLY GENMASK(31, 25) #define VCU_ENC_CORE_CTRL 0x30 #define VCU_ENC_MCU_CTRL 0x34 #define VCU_DEC_CORE_CTRL 0x38 #define VCU_DEC_MCU_CTRL 0x3c #define VCU_PLL_STATUS 0x60 #define VCU_PLL_STATUS_LOCK_STATUS BIT(0) #define MHZ 1000000 #define FVCO_MIN (1500U * MHZ) #define FVCO_MAX (3000U * MHZ) /** * 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 { struct device *dev; struct clk *pll_ref; struct clk *aclk; struct regmap *logicore_reg_ba; void __iomem *vcu_slcr_ba; struct clk_hw *pll; struct clk_hw *pll_post; struct clk_hw_onecell_data *clk_data; }; static struct regmap_config vcu_settings_regmap_config = { .name = "regmap", .reg_bits = 32, .val_bits = 32, .reg_stride = 4, .max_register = 0xfff, .cache_type = REGCACHE_NONE, }; /** * 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 { u32 fbdiv; u32 cp; u32 res; u32 lfhf; u32 lock_dly; u32 lock_cnt; }; static const struct xvcu_pll_cfg xvcu_pll_cfg[] = { { 25, 3, 10, 3, 63, 1000 }, { 26, 3, 10, 3, 63, 1000 }, { 27, 4, 6, 3, 63, 1000 }, { 28, 4, 6, 3, 63, 1000 }, { 29, 4, 6, 3, 63, 1000 }, { 30, 4, 6, 3, 63, 1000 }, { 31, 6, 1, 3, 63, 1000 }, { 32, 6, 1, 3, 63, 1000 }, { 33, 4, 10, 3, 63, 1000 }, { 34, 5, 6, 3, 63, 1000 }, { 35, 5, 6, 3, 63, 1000 }, { 36, 5, 6, 3, 63, 1000 }, { 37, 5, 6, 3, 63, 1000 }, { 38, 5, 6, 3, 63, 975 }, { 39, 3, 12, 3, 63, 950 }, { 40, 3, 12, 3, 63, 925 }, { 41, 3, 12, 3, 63, 900 }, { 42, 3, 12, 3, 63, 875 }, { 43, 3, 12, 3, 63, 850 }, { 44, 3, 12, 3, 63, 850 }, { 45, 3, 12, 3, 63, 825 }, { 46, 3, 12, 3, 63, 800 }, { 47, 3, 12, 3, 63, 775 }, { 48, 3, 12, 3, 63, 775 }, { 49, 3, 12, 3, 63, 750 }, { 50, 3, 12, 3, 63, 750 }, { 51, 3, 2, 3, 63, 725 }, { 52, 3, 2, 3, 63, 700 }, { 53, 3, 2, 3, 63, 700 }, { 54, 3, 2, 3, 63, 675 }, { 55, 3, 2, 3, 63, 675 }, { 56, 3, 2, 3, 63, 650 }, { 57, 3, 2, 3, 63, 650 }, { 58, 3, 2, 3, 63, 625 }, { 59, 3, 2, 3, 63, 625 }, { 60, 3, 2, 3, 63, 625 }, { 61, 3, 2, 3, 63, 600 }, { 62, 3, 2, 3, 63, 600 }, { 63, 3, 2, 3, 63, 600 }, { 64, 3, 2, 3, 63, 600 }, { 65, 3, 2, 3, 63, 600 }, { 66, 3, 2, 3, 63, 600 }, { 67, 3, 2, 3, 63, 600 }, { 68, 3, 2, 3, 63, 600 }, { 69, 3, 2, 3, 63, 600 }, { 70, 3, 2, 3, 63, 600 }, { 71, 3, 2, 3, 63, 600 }, { 72, 3, 2, 3, 63, 600 }, { 73, 3, 2, 3, 63, 600 }, { 74, 3, 2, 3, 63, 600 }, { 75, 3, 2, 3, 63, 600 }, { 76, 3, 2, 3, 63, 600 }, { 77, 3, 2, 3, 63, 600 }, { 78, 3, 2, 3, 63, 600 }, { 79, 3, 2, 3, 63, 600 }, { 80, 3, 2, 3, 63, 600 }, { 81, 3, 2, 3, 63, 600 }, { 82, 3, 2, 3, 63, 600 }, { 83, 4, 2, 3, 63, 600 }, { 84, 4, 2, 3, 63, 600 }, { 85, 4, 2, 3, 63, 600 }, { 86, 4, 2, 3, 63, 600 }, { 87, 4, 2, 3, 63, 600 }, { 88, 4, 2, 3, 63, 600 }, { 89, 4, 2, 3, 63, 600 }, { 90, 4, 2, 3, 63, 600 }, { 91, 4, 2, 3, 63, 600 }, { 92, 4, 2, 3, 63, 600 }, { 93, 4, 2, 3, 63, 600 }, { 94, 4, 2, 3, 63, 600 }, { 95, 4, 2, 3, 63, 600 }, { 96, 4, 2, 3, 63, 600 }, { 97, 4, 2, 3, 63, 600 }, { 98, 4, 2, 3, 63, 600 }, { 99, 4, 2, 3, 63, 600 }, { 100, 4, 2, 3, 63, 600 }, { 101, 4, 2, 3, 63, 600 }, { 102, 4, 2, 3, 63, 600 }, { 103, 5, 2, 3, 63, 600 }, { 104, 5, 2, 3, 63, 600 }, { 105, 5, 2, 3, 63, 600 }, { 106, 5, 2, 3, 63, 600 }, { 107, 3, 4, 3, 63, 600 }, { 108, 3, 4, 3, 63, 600 }, { 109, 3, 4, 3, 63, 600 }, { 110, 3, 4, 3, 63, 600 }, { 111, 3, 4, 3, 63, 600 }, { 112, 3, 4, 3, 63, 600 }, { 113, 3, 4, 3, 63, 600 }, { 114, 3, 4, 3, 63, 600 }, { 115, 3, 4, 3, 63, 600 }, { 116, 3, 4, 3, 63, 600 }, { 117, 3, 4, 3, 63, 600 }, { 118, 3, 4, 3, 63, 600 }, { 119, 3, 4, 3, 63, 600 }, { 120, 3, 4, 3, 63, 600 }, { 121, 3, 4, 3, 63, 600 }, { 122, 3, 4, 3, 63, 600 }, { 123, 3, 4, 3, 63, 600 }, { 124, 3, 4, 3, 63, 600 }, { 125, 3, 4, 3, 63, 600 }, }; /** * 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) { return ioread32(iomem + 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) { iowrite32(value, iomem + offset); } #define to_vcu_pll(_hw) container_of(_hw, struct vcu_pll, hw) struct vcu_pll { struct clk_hw hw; void __iomem *reg_base; unsigned long fvco_min; unsigned long fvco_max; }; static int xvcu_pll_wait_for_lock(struct vcu_pll *pll) { void __iomem *base = pll->reg_base; unsigned long timeout; u32 lock_status; timeout = jiffies + msecs_to_jiffies(2000); do { lock_status = xvcu_read(base, VCU_PLL_STATUS); if (lock_status & VCU_PLL_STATUS_LOCK_STATUS) return 0; } while (!time_after(jiffies, timeout)); return -ETIMEDOUT; } static struct clk_hw *xvcu_register_pll_post(struct device *dev, const char *name, const struct clk_hw *parent_hw, void __iomem *reg_base) { u32 div; u32 vcu_pll_ctrl; /* * The output divider of the PLL must be set to 1/2 to meet the * timing in the design. */ vcu_pll_ctrl = xvcu_read(reg_base, VCU_PLL_CTRL); div = FIELD_GET(VCU_PLL_CTRL_CLKOUTDIV, vcu_pll_ctrl); if (div != 1) return ERR_PTR(-EINVAL); return clk_hw_register_fixed_factor(dev, "vcu_pll_post", clk_hw_get_name(parent_hw), CLK_SET_RATE_PARENT, 1, 2); } static const struct xvcu_pll_cfg *xvcu_find_cfg(int div) { const struct xvcu_pll_cfg *cfg = NULL; unsigned int i; for (i = 0; i < ARRAY_SIZE(xvcu_pll_cfg) - 1; i++) if (xvcu_pll_cfg[i].fbdiv == div) cfg = &xvcu_pll_cfg[i]; return cfg; } static int xvcu_pll_set_div(struct vcu_pll *pll, int div) { void __iomem *base = pll->reg_base; const struct xvcu_pll_cfg *cfg = NULL; u32 vcu_pll_ctrl; u32 cfg_val; cfg = xvcu_find_cfg(div); if (!cfg) return -EINVAL; vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL); vcu_pll_ctrl &= ~VCU_PLL_CTRL_FBDIV; vcu_pll_ctrl |= FIELD_PREP(VCU_PLL_CTRL_FBDIV, cfg->fbdiv); xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl); cfg_val = FIELD_PREP(VCU_PLL_CFG_RES, cfg->res) | FIELD_PREP(VCU_PLL_CFG_CP, cfg->cp) | FIELD_PREP(VCU_PLL_CFG_LFHF, cfg->lfhf) | FIELD_PREP(VCU_PLL_CFG_LOCK_CNT, cfg->lock_cnt) | FIELD_PREP(VCU_PLL_CFG_LOCK_DLY, cfg->lock_dly); xvcu_write(base, VCU_PLL_CFG, cfg_val); return 0; } static long xvcu_pll_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate) { struct vcu_pll *pll = to_vcu_pll(hw); unsigned int feedback_div; rate = clamp_t(unsigned long, rate, pll->fvco_min, pll->fvco_max); feedback_div = DIV_ROUND_CLOSEST_ULL(rate, *parent_rate); feedback_div = clamp_t(unsigned int, feedback_div, 25, 125); return *parent_rate * feedback_div; } static unsigned long xvcu_pll_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { struct vcu_pll *pll = to_vcu_pll(hw); void __iomem *base = pll->reg_base; unsigned int div; u32 vcu_pll_ctrl; vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL); div = FIELD_GET(VCU_PLL_CTRL_FBDIV, vcu_pll_ctrl); return div * parent_rate; } static int xvcu_pll_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate) { struct vcu_pll *pll = to_vcu_pll(hw); return xvcu_pll_set_div(pll, rate / parent_rate); } static int xvcu_pll_enable(struct clk_hw *hw) { struct vcu_pll *pll = to_vcu_pll(hw); void __iomem *base = pll->reg_base; u32 vcu_pll_ctrl; int ret; vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL); vcu_pll_ctrl |= VCU_PLL_CTRL_BYPASS; xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl); vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL); vcu_pll_ctrl &= ~VCU_PLL_CTRL_POR_IN; vcu_pll_ctrl &= ~VCU_PLL_CTRL_PWR_POR; vcu_pll_ctrl &= ~VCU_PLL_CTRL_RESET; xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl); ret = xvcu_pll_wait_for_lock(pll); if (ret) { pr_err("VCU PLL is not locked\n"); goto err; } vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL); vcu_pll_ctrl &= ~VCU_PLL_CTRL_BYPASS; xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl); err: return ret; } static void xvcu_pll_disable(struct clk_hw *hw) { struct vcu_pll *pll = to_vcu_pll(hw); void __iomem *base = pll->reg_base; u32 vcu_pll_ctrl; vcu_pll_ctrl = xvcu_read(base, VCU_PLL_CTRL); vcu_pll_ctrl |= VCU_PLL_CTRL_POR_IN; vcu_pll_ctrl |= VCU_PLL_CTRL_PWR_POR; vcu_pll_ctrl |= VCU_PLL_CTRL_RESET; xvcu_write(base, VCU_PLL_CTRL, vcu_pll_ctrl); } static const struct clk_ops vcu_pll_ops = { .enable = xvcu_pll_enable, .disable = xvcu_pll_disable, .round_rate = xvcu_pll_round_rate, .recalc_rate = xvcu_pll_recalc_rate, .set_rate = xvcu_pll_set_rate, }; static struct clk_hw *xvcu_register_pll(struct device *dev, void __iomem *reg_base, const char *name, const char *parent, unsigned long flags) { struct vcu_pll *pll; struct clk_hw *hw; struct clk_init_data init; int ret; init.name = name; init.parent_names = &parent; init.ops = &vcu_pll_ops; init.num_parents = 1; init.flags = flags; pll = devm_kmalloc(dev, sizeof(*pll), GFP_KERNEL); if (!pll) return ERR_PTR(-ENOMEM); pll->hw.init = &init; pll->reg_base = reg_base; pll->fvco_min = FVCO_MIN; pll->fvco_max = FVCO_MAX; hw = &pll->hw; ret = devm_clk_hw_register(dev, hw); if (ret) return ERR_PTR(ret); clk_hw_set_rate_range(hw, pll->fvco_min, pll->fvco_max); return hw; } 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) { u8 mux_flags = CLK_MUX_ROUND_CLOSEST; u8 divider_flags = CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO | CLK_DIVIDER_ROUND_CLOSEST; struct clk_hw *mux = NULL; struct clk_hw *divider = NULL; struct clk_hw *gate = NULL; char *name_mux; char *name_div; int err; /* Protect register shared by clocks */ spinlock_t *lock; lock = devm_kzalloc(dev, sizeof(*lock), GFP_KERNEL); if (!lock) return ERR_PTR(-ENOMEM); spin_lock_init(lock); name_mux = devm_kasprintf(dev, GFP_KERNEL, "%s%s", name, "_mux"); if (!name_mux) return ERR_PTR(-ENOMEM); mux = clk_hw_register_mux_parent_data(dev, name_mux, parent_data, num_parents, CLK_SET_RATE_PARENT, reg, 0, 1, mux_flags, lock); if (IS_ERR(mux)) return mux; name_div = devm_kasprintf(dev, GFP_KERNEL, "%s%s", name, "_div"); if (!name_div) { err = -ENOMEM; goto unregister_mux; } divider = clk_hw_register_divider_parent_hw(dev, name_div, mux, CLK_SET_RATE_PARENT, reg, 4, 6, divider_flags, lock); if (IS_ERR(divider)) { err = PTR_ERR(divider); goto unregister_mux; } gate = clk_hw_register_gate_parent_hw(dev, name, divider, CLK_SET_RATE_PARENT, reg, 12, 0, lock); if (IS_ERR(gate)) { err = PTR_ERR(gate); goto unregister_divider; } return gate; unregister_divider: clk_hw_unregister_divider(divider); unregister_mux: clk_hw_unregister_mux(mux); return ERR_PTR(err); } static void xvcu_clk_hw_unregister_leaf(struct clk_hw *hw) { struct clk_hw *gate = hw; struct clk_hw *divider; struct clk_hw *mux; if (!gate) return; divider = clk_hw_get_parent(gate); clk_hw_unregister_gate(gate); if (!divider) return; mux = clk_hw_get_parent(divider); clk_hw_unregister_mux(mux); if (!divider) return; clk_hw_unregister_divider(divider); } static int xvcu_register_clock_provider(struct xvcu_device *xvcu) { struct device *dev = xvcu->dev; struct clk_parent_data parent_data[2] = { 0 }; struct clk_hw_onecell_data *data; struct clk_hw **hws; struct clk_hw *hw; void __iomem *reg_base = xvcu->vcu_slcr_ba; data = devm_kzalloc(dev, struct_size(data, hws, CLK_XVCU_NUM_CLOCKS), GFP_KERNEL); if (!data) return -ENOMEM; data->num = CLK_XVCU_NUM_CLOCKS; hws = data->hws; xvcu->clk_data = data; hw = xvcu_register_pll(dev, reg_base, "vcu_pll", __clk_get_name(xvcu->pll_ref), CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE); if (IS_ERR(hw)) return PTR_ERR(hw); xvcu->pll = hw; hw = xvcu_register_pll_post(dev, "vcu_pll_post", xvcu->pll, reg_base); if (IS_ERR(hw)) return PTR_ERR(hw); xvcu->pll_post = hw; parent_data[0].fw_name = "pll_ref"; parent_data[1].hw = xvcu->pll_post; hws[CLK_XVCU_ENC_CORE] = xvcu_clk_hw_register_leaf(dev, "venc_core_clk", parent_data, ARRAY_SIZE(parent_data), reg_base + VCU_ENC_CORE_CTRL); hws[CLK_XVCU_ENC_MCU] = xvcu_clk_hw_register_leaf(dev, "venc_mcu_clk", parent_data, ARRAY_SIZE(parent_data), reg_base + VCU_ENC_MCU_CTRL); hws[CLK_XVCU_DEC_CORE] = xvcu_clk_hw_register_leaf(dev, "vdec_core_clk", parent_data, ARRAY_SIZE(parent_data), reg_base + VCU_DEC_CORE_CTRL); hws[CLK_XVCU_DEC_MCU] = xvcu_clk_hw_register_leaf(dev, "vdec_mcu_clk", parent_data, ARRAY_SIZE(parent_data), reg_base + VCU_DEC_MCU_CTRL); return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, data); } static void xvcu_unregister_clock_provider(struct xvcu_device *xvcu) { struct clk_hw_onecell_data *data = xvcu->clk_data; struct clk_hw **hws = data->hws; if (!IS_ERR_OR_NULL(hws[CLK_XVCU_DEC_MCU])) xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_DEC_MCU]); if (!IS_ERR_OR_NULL(hws[CLK_XVCU_DEC_CORE])) xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_DEC_CORE]); if (!IS_ERR_OR_NULL(hws[CLK_XVCU_ENC_MCU])) xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_ENC_MCU]); if (!IS_ERR_OR_NULL(hws[CLK_XVCU_ENC_CORE])) xvcu_clk_hw_unregister_leaf(hws[CLK_XVCU_ENC_CORE]); clk_hw_unregister_fixed_factor(xvcu->pll_post); } /** * 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) { struct resource *res; struct xvcu_device *xvcu; void __iomem *regs; int ret; xvcu = devm_kzalloc(&pdev->dev, sizeof(*xvcu), GFP_KERNEL); if (!xvcu) return -ENOMEM; xvcu->dev = &pdev->dev; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vcu_slcr"); if (!res) { dev_err(&pdev->dev, "get vcu_slcr memory resource failed.\n"); return -ENODEV; } xvcu->vcu_slcr_ba = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!xvcu->vcu_slcr_ba) { dev_err(&pdev->dev, "vcu_slcr register mapping failed.\n"); return -ENOMEM; } xvcu->logicore_reg_ba = syscon_regmap_lookup_by_compatible("xlnx,vcu-settings"); if (IS_ERR(xvcu->logicore_reg_ba)) { dev_info(&pdev->dev, "could not find xlnx,vcu-settings: trying direct register access\n"); res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "logicore"); if (!res) { dev_err(&pdev->dev, "get logicore memory resource failed.\n"); return -ENODEV; } regs = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!regs) { dev_err(&pdev->dev, "logicore register mapping failed.\n"); return -ENOMEM; } xvcu->logicore_reg_ba = devm_regmap_init_mmio(&pdev->dev, regs, &vcu_settings_regmap_config); if (IS_ERR(xvcu->logicore_reg_ba)) { dev_err(&pdev->dev, "failed to init regmap\n"); return PTR_ERR(xvcu->logicore_reg_ba); } } xvcu->aclk = devm_clk_get(&pdev->dev, "aclk"); if (IS_ERR(xvcu->aclk)) { dev_err(&pdev->dev, "Could not get aclk clock\n"); return PTR_ERR(xvcu->aclk); } xvcu->pll_ref = devm_clk_get(&pdev->dev, "pll_ref"); if (IS_ERR(xvcu->pll_ref)) { dev_err(&pdev->dev, "Could not get pll_ref clock\n"); return PTR_ERR(xvcu->pll_ref); } ret = clk_prepare_enable(xvcu->aclk); if (ret) { dev_err(&pdev->dev, "aclk clock enable failed\n"); return ret; } /* * Do the Gasket isolation and put the VCU out of reset * Bit 0 : Gasket isolation * Bit 1 : put VCU out of reset */ regmap_write(xvcu->logicore_reg_ba, VCU_GASKET_INIT, VCU_GASKET_VALUE); ret = xvcu_register_clock_provider(xvcu); if (ret) { dev_err(&pdev->dev, "failed to register clock provider\n"); goto error_clk_provider; } dev_set_drvdata(&pdev->dev, xvcu); return 0; error_clk_provider: xvcu_unregister_clock_provider(xvcu); clk_disable_unprepare(xvcu->aclk); return ret; } /** * 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) { struct xvcu_device *xvcu; xvcu = platform_get_drvdata(pdev); xvcu_unregister_clock_provider(xvcu); /* Add the Gasket isolation and put the VCU in reset. */ regmap_write(xvcu->logicore_reg_ba, VCU_GASKET_INIT, 0); clk_disable_unprepare(xvcu->aclk); } static const struct of_device_id xvcu_of_id_table[] = { { .compatible = "xlnx,vcu" }, { .compatible = "xlnx,vcu-logicoreip-1.0" }, { } }; MODULE_DEVICE_TABLE(of, xvcu_of_id_table); static struct platform_driver xvcu_driver = { .driver = { .name = "xilinx-vcu", .of_match_table = xvcu_of_id_table, }, .probe = xvcu_probe, .remove_new = xvcu_remove, }; module_platform_driver(xvcu_driver); MODULE_AUTHOR("Dhaval Shah <dshah@xilinx.com>"); MODULE_DESCRIPTION("Xilinx VCU init Driver"); MODULE_LICENSE("GPL v2");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1