diff options
Diffstat (limited to 'drivers/clk/xilinx/clk-xlnx-clock-wizard.c')
| -rw-r--r-- | drivers/clk/xilinx/clk-xlnx-clock-wizard.c | 1253 |
1 files changed, 1253 insertions, 0 deletions
diff --git a/drivers/clk/xilinx/clk-xlnx-clock-wizard.c b/drivers/clk/xilinx/clk-xlnx-clock-wizard.c new file mode 100644 index 000000000000..4a0136349f71 --- /dev/null +++ b/drivers/clk/xilinx/clk-xlnx-clock-wizard.c @@ -0,0 +1,1253 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Xilinx 'Clocking Wizard' driver + * + * Copyright (C) 2013 - 2021 Xilinx + * + * Sören Brinkmann <soren.brinkmann@xilinx.com> + * + */ + +#include <linux/bitfield.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/math64.h> +#include <linux/module.h> +#include <linux/overflow.h> +#include <linux/err.h> +#include <linux/iopoll.h> + +#define WZRD_NUM_OUTPUTS 7 +#define WZRD_ACLK_MAX_FREQ 250000000UL + +#define WZRD_CLK_CFG_REG(v, n) (0x200 + 0x130 * (v) + 4 * (n)) + +#define WZRD_CLKOUT0_FRAC_EN BIT(18) +#define WZRD_CLKFBOUT_1 0 +#define WZRD_CLKFBOUT_2 1 +#define WZRD_CLKOUT0_1 2 +#define WZRD_CLKOUT0_2 3 +#define WZRD_DESKEW_2 20 +#define WZRD_DIVCLK 21 +#define WZRD_CLKFBOUT_4 51 +#define WZRD_CLKFBOUT_3 48 +#define WZRD_DUTY_CYCLE 2 +#define WZRD_O_DIV 4 + +#define WZRD_CLKFBOUT_FRAC_EN BIT(1) +#define WZRD_CLKFBOUT_PREDIV2 (BIT(11) | BIT(12) | BIT(9)) +#define WZRD_MULT_PREDIV2 (BIT(10) | BIT(9) | BIT(12)) +#define WZRD_CLKFBOUT_EDGE BIT(8) +#define WZRD_P5EN BIT(13) +#define WZRD_P5EN_SHIFT 13 +#define WZRD_P5FEDGE BIT(15) +#define WZRD_DIVCLK_EDGE BIT(10) +#define WZRD_P5FEDGE_SHIFT 15 +#define WZRD_CLKOUT0_PREDIV2 BIT(11) +#define WZRD_EDGE_SHIFT 8 + +#define WZRD_CLKFBOUT_MULT_SHIFT 8 +#define WZRD_CLKFBOUT_MULT_MASK (0xff << WZRD_CLKFBOUT_MULT_SHIFT) +#define WZRD_CLKFBOUT_MULT_FRAC_MASK GENMASK(25, 16) +#define WZRD_CLKFBOUT_O_MASK GENMASK(7, 0) +#define WZRD_CLKFBOUT_L_SHIFT 0 +#define WZRD_CLKFBOUT_H_SHIFT 8 +#define WZRD_CLKFBOUT_L_MASK GENMASK(7, 0) +#define WZRD_CLKFBOUT_H_MASK GENMASK(15, 8) +#define WZRD_CLKFBOUT_FRAC_SHIFT 16 +#define WZRD_CLKFBOUT_FRAC_MASK (0x3ff << WZRD_CLKFBOUT_FRAC_SHIFT) +#define WZRD_VERSAL_FRAC_MASK GENMASK(5, 0) +#define WZRD_DIVCLK_DIVIDE_SHIFT 0 +#define WZRD_DIVCLK_DIVIDE_MASK (0xff << WZRD_DIVCLK_DIVIDE_SHIFT) +#define WZRD_CLKOUT_DIVIDE_SHIFT 0 +#define WZRD_CLKOUT_DIVIDE_WIDTH 8 +#define WZRD_CLKOUT_DIVIDE_MASK (0xff << WZRD_DIVCLK_DIVIDE_SHIFT) +#define WZRD_CLKOUT_FRAC_SHIFT 8 +#define WZRD_CLKOUT_FRAC_MASK 0x3ff +#define WZRD_CLKOUT0_FRAC_MASK GENMASK(17, 8) + +#define WZRD_DR_MAX_INT_DIV_VALUE 255 +#define WZRD_DR_STATUS_REG_OFFSET 0x04 +#define WZRD_DR_LOCK_BIT_MASK 0x00000001 +#define WZRD_DR_INIT_REG_OFFSET 0x25C +#define WZRD_DR_INIT_VERSAL_OFFSET 0x14 +#define WZRD_DR_DIV_TO_PHASE_OFFSET 4 +#define WZRD_DR_BEGIN_DYNA_RECONF 0x03 +#define WZRD_DR_BEGIN_DYNA_RECONF_5_2 0x07 +#define WZRD_DR_BEGIN_DYNA_RECONF1_5_2 0x02 + +#define WZRD_USEC_POLL 10 +#define WZRD_TIMEOUT_POLL 1000 +#define WZRD_FRAC_GRADIENT 64 +#define PREDIV2_MULT 2 + +/* Divider limits, from UG572 Table 3-4 for Ultrascale+ */ +#define DIV_O 0x01 +#define DIV_ALL 0x03 + +#define WZRD_M_MIN 2ULL +#define WZRD_M_MAX 128ULL +#define WZRD_D_MIN 1ULL +#define WZRD_D_MAX 106ULL +#define WZRD_VCO_MIN 800000000ULL +#define WZRD_VCO_MAX 1600000000ULL +#define WZRD_O_MIN 2ULL +#define WZRD_O_MAX 128ULL +#define VER_WZRD_M_MIN 4 +#define VER_WZRD_M_MAX 432 +#define VER_WZRD_D_MIN 1 +#define VER_WZRD_D_MAX 123 +#define VER_WZRD_VCO_MIN 2160000000ULL +#define VER_WZRD_VCO_MAX 4320000000ULL +#define VER_WZRD_O_MIN 2 +#define VER_WZRD_O_MAX 511 +#define WZRD_MIN_ERR 20000 +#define WZRD_FRAC_POINTS 1000 + +/* Get the mask from width */ +#define div_mask(width) ((1 << (width)) - 1) + +/* Extract divider instance from clock hardware instance */ +#define to_clk_wzrd_divider(_hw) container_of(_hw, struct clk_wzrd_divider, hw) + +enum clk_wzrd_int_clks { + wzrd_clk_mul, + wzrd_clk_mul_div, + wzrd_clk_mul_frac, + wzrd_clk_int_max +}; + +/** + * struct clk_wzrd - Clock wizard private data structure + * + * @nb: Notifier block + * @base: Memory base + * @clk_in1: Handle to input clock 'clk_in1' + * @axi_clk: Handle to input clock 's_axi_aclk' + * @clks_internal: Internal clocks + * @speed_grade: Speed grade of the device + * @suspended: Flag indicating power state of the device + * @clk_data: Output clock data + */ +struct clk_wzrd { + struct notifier_block nb; + void __iomem *base; + struct clk *clk_in1; + struct clk *axi_clk; + struct clk_hw *clks_internal[wzrd_clk_int_max]; + unsigned int speed_grade; + bool suspended; + struct clk_hw_onecell_data clk_data; +}; + +/** + * struct clk_wzrd_divider - clock divider specific to clk_wzrd + * + * @hw: handle between common and hardware-specific interfaces + * @base: base address of register containing the divider + * @offset: offset address of register containing the divider + * @shift: shift to the divider bit field + * @width: width of the divider bit field + * @flags: clk_wzrd divider flags + * @table: array of value/divider pairs, last entry should have div = 0 + * @m: value of the multiplier + * @m_frac: fractional value of the multiplier + * @d: value of the common divider + * @o: value of the leaf divider + * @o_frac: value of the fractional leaf divider + * @lock: register lock + */ +struct clk_wzrd_divider { + struct clk_hw hw; + void __iomem *base; + u16 offset; + u8 shift; + u8 width; + u8 flags; + const struct clk_div_table *table; + u32 m; + u32 m_frac; + u32 d; + u32 o; + u32 o_frac; + spinlock_t *lock; /* divider lock */ +}; + +struct versal_clk_data { + bool is_versal; +}; + +#define to_clk_wzrd(_nb) container_of(_nb, struct clk_wzrd, nb) + +/* maximum frequencies for input/output clocks per speed grade */ +static const unsigned long clk_wzrd_max_freq[] = { + 800000000UL, + 933000000UL, + 1066000000UL +}; + +/* spin lock variable for clk_wzrd */ +static DEFINE_SPINLOCK(clkwzrd_lock); + +static unsigned long clk_wzrd_recalc_rate_ver(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + void __iomem *div_addr = divider->base + divider->offset; + u32 div, p5en, edge, prediv2, all; + unsigned int vall, valh; + + edge = !!(readl(div_addr) & WZRD_CLKFBOUT_EDGE); + p5en = !!(readl(div_addr) & WZRD_P5EN); + prediv2 = !!(readl(div_addr) & WZRD_CLKOUT0_PREDIV2); + vall = readl(div_addr + 4) & WZRD_CLKFBOUT_L_MASK; + valh = readl(div_addr + 4) >> WZRD_CLKFBOUT_H_SHIFT; + all = valh + vall + edge; + if (!all) + all = 1; + + if (prediv2) + div = 2 * all + prediv2 * p5en; + else + div = all; + + return DIV_ROUND_UP_ULL((u64)parent_rate, div); +} + +static unsigned long clk_wzrd_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + void __iomem *div_addr = divider->base + divider->offset; + unsigned int val; + + val = readl(div_addr) >> divider->shift; + val &= div_mask(divider->width); + + return divider_recalc_rate(hw, parent_rate, val, divider->table, + divider->flags, divider->width); +} + +static int clk_wzrd_ver_dynamic_reconfig(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + void __iomem *div_addr = divider->base + divider->offset; + u32 value, regh, edged, p5en, p5fedge, regval, regval1; + unsigned long flags; + int err; + + spin_lock_irqsave(divider->lock, flags); + + value = DIV_ROUND_CLOSEST(parent_rate, rate); + + regh = (value / 4); + regval1 = readl(div_addr); + regval1 |= WZRD_CLKFBOUT_PREDIV2; + regval1 = regval1 & ~(WZRD_CLKFBOUT_EDGE | WZRD_P5EN | WZRD_P5FEDGE); + if (value % 4 > 1) { + edged = 1; + regval1 |= (edged << WZRD_EDGE_SHIFT); + } + p5fedge = value % 2; + p5en = value % 2; + regval1 = regval1 | p5en << WZRD_P5EN_SHIFT | p5fedge << WZRD_P5FEDGE_SHIFT; + writel(regval1, div_addr); + + regval = regh | regh << WZRD_CLKFBOUT_H_SHIFT; + writel(regval, div_addr + 4); + /* Check status register */ + err = readl_poll_timeout_atomic(divider->base + WZRD_DR_STATUS_REG_OFFSET, + value, value & WZRD_DR_LOCK_BIT_MASK, + WZRD_USEC_POLL, WZRD_TIMEOUT_POLL); + if (err) + goto err_reconfig; + + /* Initiate reconfiguration */ + writel(WZRD_DR_BEGIN_DYNA_RECONF, + divider->base + WZRD_DR_INIT_VERSAL_OFFSET); + + /* Check status register */ + err = readl_poll_timeout_atomic(divider->base + WZRD_DR_STATUS_REG_OFFSET, + value, value & WZRD_DR_LOCK_BIT_MASK, + WZRD_USEC_POLL, WZRD_TIMEOUT_POLL); +err_reconfig: + spin_unlock_irqrestore(divider->lock, flags); + return err; +} + +static int clk_wzrd_dynamic_reconfig(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + void __iomem *div_addr = divider->base + divider->offset; + unsigned long flags; + u32 value; + int err; + + spin_lock_irqsave(divider->lock, flags); + + value = DIV_ROUND_CLOSEST(parent_rate, rate); + + /* Cap the value to max */ + min_t(u32, value, WZRD_DR_MAX_INT_DIV_VALUE); + + /* Set divisor and clear phase offset */ + writel(value, div_addr); + writel(0x00, div_addr + WZRD_DR_DIV_TO_PHASE_OFFSET); + + /* Check status register */ + err = readl_poll_timeout_atomic(divider->base + WZRD_DR_STATUS_REG_OFFSET, + value, value & WZRD_DR_LOCK_BIT_MASK, + WZRD_USEC_POLL, WZRD_TIMEOUT_POLL); + if (err) + goto err_reconfig; + + /* Initiate reconfiguration */ + writel(WZRD_DR_BEGIN_DYNA_RECONF_5_2, + divider->base + WZRD_DR_INIT_REG_OFFSET); + writel(WZRD_DR_BEGIN_DYNA_RECONF1_5_2, + divider->base + WZRD_DR_INIT_REG_OFFSET); + + /* Check status register */ + err = readl_poll_timeout_atomic(divider->base + WZRD_DR_STATUS_REG_OFFSET, + value, value & WZRD_DR_LOCK_BIT_MASK, + WZRD_USEC_POLL, WZRD_TIMEOUT_POLL); +err_reconfig: + spin_unlock_irqrestore(divider->lock, flags); + return err; +} + +static int clk_wzrd_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + u8 div; + + /* + * since we don't change parent rate we just round rate to closest + * achievable + */ + div = DIV_ROUND_CLOSEST(req->best_parent_rate, req->rate); + + req->rate = req->best_parent_rate / div; + + return 0; +} + +static int clk_wzrd_get_divisors_ver(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + u64 vco_freq, freq, diff, vcomin, vcomax, best_diff = -1ULL; + u32 m, d, o; + u32 mmin, mmax, dmin, dmax, omin, omax; + + mmin = VER_WZRD_M_MIN; + mmax = VER_WZRD_M_MAX; + dmin = VER_WZRD_D_MIN; + dmax = VER_WZRD_D_MAX; + omin = VER_WZRD_O_MIN; + omax = VER_WZRD_O_MAX; + vcomin = VER_WZRD_VCO_MIN; + vcomax = VER_WZRD_VCO_MAX; + + for (m = mmin; m <= mmax; m++) { + for (d = dmin; d <= dmax; d++) { + vco_freq = DIV_ROUND_CLOSEST((parent_rate * m), d); + if (vco_freq < vcomin || vco_freq > vcomax) + continue; + + o = DIV_ROUND_CLOSEST_ULL(vco_freq, rate); + if (o < omin || o > omax) + continue; + freq = DIV_ROUND_CLOSEST_ULL(vco_freq, o); + diff = abs(freq - rate); + + if (diff < best_diff) { + best_diff = diff; + divider->m = m; + divider->d = d; + divider->o = o; + if (!diff) + return 0; + } + } + } + return 0; +} + +static int clk_wzrd_get_divisors(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + u64 vco_freq, freq, diff, vcomin, vcomax, best_diff = -1ULL; + u64 m, d, o; + u64 mmin, mmax, dmin, dmax, omin, omax, mdmin, mdmax; + + mmin = WZRD_M_MIN << 3; + mmax = WZRD_M_MAX << 3; + dmin = WZRD_D_MIN; + dmax = WZRD_D_MAX; + omin = WZRD_O_MIN << 3; + omax = WZRD_O_MAX << 3; + vcomin = WZRD_VCO_MIN << 3; + vcomax = WZRD_VCO_MAX << 3; + + for (m = mmin; m <= mmax; m++) { + mdmin = max(dmin, div64_u64(parent_rate * m + vcomax / 2, vcomax)); + mdmax = min(dmax, div64_u64(parent_rate * m + vcomin / 2, vcomin)); + for (d = mdmin; d <= mdmax; d++) { + vco_freq = DIV_ROUND_CLOSEST_ULL((parent_rate * m), d); + o = DIV_ROUND_CLOSEST_ULL(vco_freq, rate); + if (o < omin || o > omax) + continue; + freq = DIV_ROUND_CLOSEST_ULL(vco_freq, o); + diff = freq - rate; + if (diff < best_diff) { + best_diff = diff; + divider->m = m >> 3; + divider->m_frac = (m - (divider->m << 3)) * 125; + divider->d = d; + divider->o = o >> 3; + divider->o_frac = (o - (divider->o << 3)) * 125; + } + } + } + return best_diff < WZRD_MIN_ERR ? 0 : -EBUSY; +} + +static int clk_wzrd_reconfig(struct clk_wzrd_divider *divider, void __iomem *div_addr) +{ + u32 value; + int err; + + /* Check status register */ + err = readl_poll_timeout_atomic(divider->base + WZRD_DR_STATUS_REG_OFFSET, value, + value & WZRD_DR_LOCK_BIT_MASK, + WZRD_USEC_POLL, WZRD_TIMEOUT_POLL); + if (err) + return -ETIMEDOUT; + + /* Initiate reconfiguration */ + writel(WZRD_DR_BEGIN_DYNA_RECONF, div_addr); + /* Check status register */ + return readl_poll_timeout_atomic(divider->base + WZRD_DR_STATUS_REG_OFFSET, value, + value & WZRD_DR_LOCK_BIT_MASK, + WZRD_USEC_POLL, WZRD_TIMEOUT_POLL); +} + +static int clk_wzrd_dynamic_ver_all_nolock(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + u32 regh, edged, p5en, p5fedge, value2, m, regval, regval1, value; + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + void __iomem *div_addr; + int err; + + err = clk_wzrd_get_divisors_ver(hw, rate, parent_rate); + if (err) + return err; + + writel(0, divider->base + WZRD_CLK_CFG_REG(1, WZRD_CLKFBOUT_4)); + + m = divider->m; + edged = m % WZRD_DUTY_CYCLE; + regh = m / WZRD_DUTY_CYCLE; + regval1 = readl(divider->base + WZRD_CLK_CFG_REG(1, + WZRD_CLKFBOUT_1)); + regval1 |= WZRD_MULT_PREDIV2; + if (edged) + regval1 = regval1 | WZRD_CLKFBOUT_EDGE; + else + regval1 = regval1 & ~WZRD_CLKFBOUT_EDGE; + + writel(regval1, divider->base + WZRD_CLK_CFG_REG(1, + WZRD_CLKFBOUT_1)); + regval1 = regh | regh << WZRD_CLKFBOUT_H_SHIFT; + writel(regval1, divider->base + WZRD_CLK_CFG_REG(1, + WZRD_CLKFBOUT_2)); + + value2 = divider->d; + edged = value2 % WZRD_DUTY_CYCLE; + regh = (value2 / WZRD_DUTY_CYCLE); + regval1 = FIELD_PREP(WZRD_DIVCLK_EDGE, edged); + writel(regval1, divider->base + WZRD_CLK_CFG_REG(1, + WZRD_DESKEW_2)); + regval1 = regh | regh << WZRD_CLKFBOUT_H_SHIFT; + writel(regval1, divider->base + WZRD_CLK_CFG_REG(1, WZRD_DIVCLK)); + + value = divider->o; + regh = value / WZRD_O_DIV; + regval1 = readl(divider->base + WZRD_CLK_CFG_REG(1, + WZRD_CLKOUT0_1)); + regval1 |= WZRD_CLKFBOUT_PREDIV2; + regval1 = regval1 & ~(WZRD_CLKFBOUT_EDGE | WZRD_P5EN | WZRD_P5FEDGE); + + if (value % WZRD_O_DIV > 1) { + edged = 1; + regval1 |= edged << WZRD_CLKFBOUT_H_SHIFT; + } + + p5fedge = value % WZRD_DUTY_CYCLE; + p5en = value % WZRD_DUTY_CYCLE; + + regval1 = regval1 | FIELD_PREP(WZRD_P5EN, p5en) | FIELD_PREP(WZRD_P5FEDGE, p5fedge); + writel(regval1, divider->base + WZRD_CLK_CFG_REG(1, + WZRD_CLKOUT0_1)); + regval = regh | regh << WZRD_CLKFBOUT_H_SHIFT; + writel(regval, divider->base + WZRD_CLK_CFG_REG(1, + WZRD_CLKOUT0_2)); + div_addr = divider->base + WZRD_DR_INIT_VERSAL_OFFSET; + + return clk_wzrd_reconfig(divider, div_addr); +} + +static int clk_wzrd_dynamic_all_nolock(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + void __iomem *div_addr; + u32 reg; + int err; + + err = clk_wzrd_get_divisors(hw, rate, parent_rate); + if (err) + return err; + + reg = FIELD_PREP(WZRD_CLKOUT_DIVIDE_MASK, divider->o) | + FIELD_PREP(WZRD_CLKOUT0_FRAC_MASK, divider->o_frac); + + writel(reg, divider->base + WZRD_CLK_CFG_REG(0, 2)); + reg = FIELD_PREP(WZRD_CLKFBOUT_MULT_MASK, divider->m) | + FIELD_PREP(WZRD_CLKFBOUT_MULT_FRAC_MASK, divider->m_frac) | + FIELD_PREP(WZRD_DIVCLK_DIVIDE_MASK, divider->d); + writel(reg, divider->base + WZRD_CLK_CFG_REG(0, 0)); + writel(0, divider->base + WZRD_CLK_CFG_REG(0, 3)); + div_addr = divider->base + WZRD_DR_INIT_REG_OFFSET; + return clk_wzrd_reconfig(divider, div_addr); +} + +static int clk_wzrd_dynamic_all(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + unsigned long flags; + int ret; + + spin_lock_irqsave(divider->lock, flags); + + ret = clk_wzrd_dynamic_all_nolock(hw, rate, parent_rate); + + spin_unlock_irqrestore(divider->lock, flags); + + return ret; +} + +static int clk_wzrd_dynamic_all_ver(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + unsigned long flags; + int ret; + + spin_lock_irqsave(divider->lock, flags); + + ret = clk_wzrd_dynamic_ver_all_nolock(hw, rate, parent_rate); + + spin_unlock_irqrestore(divider->lock, flags); + + return ret; +} + +static unsigned long clk_wzrd_recalc_rate_all(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + u32 m, d, o, reg, f, mf; + u64 mul; + + reg = readl(divider->base + WZRD_CLK_CFG_REG(0, 0)); + d = FIELD_GET(WZRD_DIVCLK_DIVIDE_MASK, reg); + m = FIELD_GET(WZRD_CLKFBOUT_MULT_MASK, reg); + mf = FIELD_GET(WZRD_CLKFBOUT_MULT_FRAC_MASK, reg); + reg = readl(divider->base + WZRD_CLK_CFG_REG(0, 2)); + o = FIELD_GET(WZRD_DIVCLK_DIVIDE_MASK, reg); + f = FIELD_GET(WZRD_CLKOUT0_FRAC_MASK, reg); + + mul = m * 1000 + mf; + return DIV_ROUND_CLOSEST_ULL(parent_rate * mul, d * (o * 1000 + f)); +} + +static unsigned long clk_wzrd_recalc_rate_all_ver(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + u32 edged, div2, p5en, edge, prediv2, all, regl, regh, mult; + u32 div, reg; + + edge = !!(readl(divider->base + WZRD_CLK_CFG_REG(1, WZRD_CLKFBOUT_1)) & + WZRD_CLKFBOUT_EDGE); + + reg = readl(divider->base + WZRD_CLK_CFG_REG(1, WZRD_CLKFBOUT_2)); + regl = FIELD_GET(WZRD_CLKFBOUT_L_MASK, reg); + regh = FIELD_GET(WZRD_CLKFBOUT_H_MASK, reg); + + mult = regl + regh + edge; + if (!mult) + mult = 1; + + regl = readl(divider->base + WZRD_CLK_CFG_REG(1, WZRD_CLKFBOUT_4)) & + WZRD_CLKFBOUT_FRAC_EN; + if (regl) { + regl = readl(divider->base + WZRD_CLK_CFG_REG(1, WZRD_CLKFBOUT_3)) + & WZRD_VERSAL_FRAC_MASK; + mult = mult * WZRD_FRAC_GRADIENT + regl; + parent_rate = DIV_ROUND_CLOSEST((parent_rate * mult), WZRD_FRAC_GRADIENT); + } else { + parent_rate = parent_rate * mult; + } + + /* O Calculation */ + reg = readl(divider->base + WZRD_CLK_CFG_REG(1, WZRD_CLKOUT0_1)); + edged = FIELD_GET(WZRD_CLKFBOUT_EDGE, reg); + p5en = FIELD_GET(WZRD_P5EN, reg); + prediv2 = FIELD_GET(WZRD_CLKOUT0_PREDIV2, reg); + + reg = readl(divider->base + WZRD_CLK_CFG_REG(1, WZRD_CLKOUT0_2)); + /* Low time */ + regl = FIELD_GET(WZRD_CLKFBOUT_L_MASK, reg); + /* High time */ + regh = FIELD_GET(WZRD_CLKFBOUT_H_MASK, reg); + all = regh + regl + edged; + if (!all) + all = 1; + + if (prediv2) + div2 = PREDIV2_MULT * all + p5en; + else + div2 = all; + + /* D calculation */ + edged = !!(readl(divider->base + WZRD_CLK_CFG_REG(1, WZRD_DESKEW_2)) & + WZRD_DIVCLK_EDGE); + reg = readl(divider->base + WZRD_CLK_CFG_REG(1, WZRD_DIVCLK)); + /* Low time */ + regl = FIELD_GET(WZRD_CLKFBOUT_L_MASK, reg); + /* High time */ + regh = FIELD_GET(WZRD_CLKFBOUT_H_MASK, reg); + div = regl + regh + edged; + if (!div) + div = 1; + + div = div * div2; + return divider_recalc_rate(hw, parent_rate, div, divider->table, + divider->flags, divider->width); +} + +static int clk_wzrd_determine_rate_all(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + u32 m, d, o; + int err; + + err = clk_wzrd_get_divisors(hw, req->rate, req->best_parent_rate); + if (err) + return err; + + m = divider->m; + d = divider->d; + o = divider->o; + + req->rate = div_u64(req->best_parent_rate * (m * 1000 + divider->m_frac), + d * (o * 1000 + divider->o_frac)); + return 0; +} + +static int clk_wzrd_ver_determine_rate_all(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + unsigned long int_freq; + u32 m, d, o, div, f; + int err; + + err = clk_wzrd_get_divisors_ver(hw, req->rate, req->best_parent_rate); + if (err) + return err; + + m = divider->m; + d = divider->d; + o = divider->o; + + div = d * o; + int_freq = divider_recalc_rate(hw, req->best_parent_rate * m, div, + divider->table, + divider->flags, divider->width); + + if (req->rate > int_freq) { + f = DIV_ROUND_CLOSEST_ULL(req->rate * WZRD_FRAC_POINTS, + int_freq); + req->rate = DIV_ROUND_CLOSEST(int_freq * f, WZRD_FRAC_POINTS); + } + return 0; +} + +static const struct clk_ops clk_wzrd_ver_divider_ops = { + .determine_rate = clk_wzrd_determine_rate, + .set_rate = clk_wzrd_ver_dynamic_reconfig, + .recalc_rate = clk_wzrd_recalc_rate_ver, +}; + +static const struct clk_ops clk_wzrd_ver_div_all_ops = { + .determine_rate = clk_wzrd_ver_determine_rate_all, + .set_rate = clk_wzrd_dynamic_all_ver, + .recalc_rate = clk_wzrd_recalc_rate_all_ver, +}; + +static const struct clk_ops clk_wzrd_clk_divider_ops = { + .determine_rate = clk_wzrd_determine_rate, + .set_rate = clk_wzrd_dynamic_reconfig, + .recalc_rate = clk_wzrd_recalc_rate, +}; + +static const struct clk_ops clk_wzrd_clk_div_all_ops = { + .determine_rate = clk_wzrd_determine_rate_all, + .set_rate = clk_wzrd_dynamic_all, + .recalc_rate = clk_wzrd_recalc_rate_all, +}; + +static unsigned long clk_wzrd_recalc_ratef(struct clk_hw *hw, + unsigned long parent_rate) +{ + unsigned int val; + u32 div, frac; + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + void __iomem *div_addr = divider->base + divider->offset; + + val = readl(div_addr); + div = val & div_mask(divider->width); + frac = (val >> WZRD_CLKOUT_FRAC_SHIFT) & WZRD_CLKOUT_FRAC_MASK; + + return mult_frac(parent_rate, 1000, (div * 1000) + frac); +} + +static int clk_wzrd_dynamic_reconfig_f(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + int err; + u32 value, pre; + unsigned long rate_div, f, clockout0_div; + struct clk_wzrd_divider *divider = to_clk_wzrd_divider(hw); + void __iomem *div_addr = divider->base + divider->offset; + + rate_div = DIV_ROUND_DOWN_ULL(parent_rate * 1000, rate); + clockout0_div = rate_div / 1000; + + pre = DIV_ROUND_CLOSEST((parent_rate * 1000), rate); + f = (u32)(pre - (clockout0_div * 1000)); + f = f & WZRD_CLKOUT_FRAC_MASK; + f = f << WZRD_CLKOUT_DIVIDE_WIDTH; + + value = (f | (clockout0_div & WZRD_CLKOUT_DIVIDE_MASK)); + + /* Set divisor and clear phase offset */ + writel(value, div_addr); + writel(0x0, div_addr + WZRD_DR_DIV_TO_PHASE_OFFSET); + + /* Check status register */ + err = readl_poll_timeout(divider->base + WZRD_DR_STATUS_REG_OFFSET, value, + value & WZRD_DR_LOCK_BIT_MASK, + WZRD_USEC_POLL, WZRD_TIMEOUT_POLL); + if (err) + return err; + + /* Initiate reconfiguration */ + writel(WZRD_DR_BEGIN_DYNA_RECONF_5_2, + divider->base + WZRD_DR_INIT_REG_OFFSET); + writel(WZRD_DR_BEGIN_DYNA_RECONF1_5_2, + divider->base + WZRD_DR_INIT_REG_OFFSET); + + /* Check status register */ + return readl_poll_timeout(divider->base + WZRD_DR_STATUS_REG_OFFSET, value, + value & WZRD_DR_LOCK_BIT_MASK, + WZRD_USEC_POLL, WZRD_TIMEOUT_POLL); +} + +static int clk_wzrd_determine_rate_f(struct clk_hw *hw, + struct clk_rate_request *req) +{ + return 0; +} + +static const struct clk_ops clk_wzrd_clk_divider_ops_f = { + .determine_rate = clk_wzrd_determine_rate_f, + .set_rate = clk_wzrd_dynamic_reconfig_f, + .recalc_rate = clk_wzrd_recalc_ratef, +}; + +static struct clk_hw *clk_wzrd_register_divf(struct device *dev, + const char *name, + const char *parent_name, + unsigned long flags, + void __iomem *base, u16 offset, + u8 shift, u8 width, + u8 clk_divider_flags, + u32 div_type, + spinlock_t *lock) +{ + struct clk_wzrd_divider *div; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL); + if (!div) + return ERR_PTR(-ENOMEM); + + init.name = name; + + init.ops = &clk_wzrd_clk_divider_ops_f; + + init.flags = flags; + init.parent_names = &parent_name; + init.num_parents = 1; + + div->base = base; + div->offset = offset; + div->shift = shift; + div->width = width; + div->flags = clk_divider_flags; + div->lock = lock; + div->hw.init = &init; + + hw = &div->hw; + ret = devm_clk_hw_register(dev, hw); + if (ret) + return ERR_PTR(ret); + + return hw; +} + +static struct clk_hw *clk_wzrd_ver_register_divider(struct device *dev, + const char *name, + const char *parent_name, + unsigned long flags, + void __iomem *base, + u16 offset, + u8 shift, u8 width, + u8 clk_divider_flags, + u32 div_type, + spinlock_t *lock) +{ + struct clk_wzrd_divider *div; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL); + if (!div) + return ERR_PTR(-ENOMEM); + + init.name = name; + if (clk_divider_flags & CLK_DIVIDER_READ_ONLY) + init.ops = &clk_divider_ro_ops; + else if (div_type == DIV_O) + init.ops = &clk_wzrd_ver_divider_ops; + else + init.ops = &clk_wzrd_ver_div_all_ops; + init.flags = flags; + init.parent_names = &parent_name; + init.num_parents = 1; + + div->base = base; + div->offset = offset; + div->shift = shift; + div->width = width; + div->flags = clk_divider_flags; + div->lock = lock; + div->hw.init = &init; + + hw = &div->hw; + ret = devm_clk_hw_register(dev, hw); + if (ret) + return ERR_PTR(ret); + + return hw; +} + +static struct clk_hw *clk_wzrd_register_divider(struct device *dev, + const char *name, + const char *parent_name, + unsigned long flags, + void __iomem *base, u16 offset, + u8 shift, u8 width, + u8 clk_divider_flags, + u32 div_type, + spinlock_t *lock) +{ + struct clk_wzrd_divider *div; + struct clk_hw *hw; + struct clk_init_data init; + int ret; + + div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL); + if (!div) + return ERR_PTR(-ENOMEM); + + init.name = name; + if (clk_divider_flags & CLK_DIVIDER_READ_ONLY) + init.ops = &clk_divider_ro_ops; + else if (div_type == DIV_O) + init.ops = &clk_wzrd_clk_divider_ops; + else + init.ops = &clk_wzrd_clk_div_all_ops; + init.flags = flags; + init.parent_names = &parent_name; + init.num_parents = 1; + + div->base = base; + div->offset = offset; + div->shift = shift; + div->width = width; + div->flags = clk_divider_flags; + div->lock = lock; + div->hw.init = &init; + + hw = &div->hw; + ret = devm_clk_hw_register(dev, hw); + if (ret) + return ERR_PTR(ret); + + return hw; +} + +static int clk_wzrd_clk_notifier(struct notifier_block *nb, unsigned long event, + void *data) +{ + unsigned long max; + struct clk_notifier_data *ndata = data; + struct clk_wzrd *clk_wzrd = to_clk_wzrd(nb); + + if (clk_wzrd->suspended) + return NOTIFY_OK; + + if (ndata->clk == clk_wzrd->clk_in1) + max = clk_wzrd_max_freq[clk_wzrd->speed_grade - 1]; + else if (ndata->clk == clk_wzrd->axi_clk) + max = WZRD_ACLK_MAX_FREQ; + else + return NOTIFY_DONE; /* should never happen */ + + switch (event) { + case PRE_RATE_CHANGE: + if (ndata->new_rate > max) + return NOTIFY_BAD; + return NOTIFY_OK; + case POST_RATE_CHANGE: + case ABORT_RATE_CHANGE: + default: + return NOTIFY_DONE; + } +} + +static int __maybe_unused clk_wzrd_suspend(struct device *dev) +{ + struct clk_wzrd *clk_wzrd = dev_get_drvdata(dev); + + clk_disable_unprepare(clk_wzrd->axi_clk); + clk_wzrd->suspended = true; + + return 0; +} + +static int __maybe_unused clk_wzrd_resume(struct device *dev) +{ + int ret; + struct clk_wzrd *clk_wzrd = dev_get_drvdata(dev); + + ret = clk_prepare_enable(clk_wzrd->axi_clk); + if (ret) { + dev_err(dev, "unable to enable s_axi_aclk\n"); + return ret; + } + + clk_wzrd->suspended = false; + + return 0; +} + +static SIMPLE_DEV_PM_OPS(clk_wzrd_dev_pm_ops, clk_wzrd_suspend, + clk_wzrd_resume); + +static const struct versal_clk_data versal_data = { + .is_versal = true, +}; + +static int clk_wzrd_register_output_clocks(struct device *dev, int nr_outputs) +{ + const char *clkout_name, *clk_name, *clk_mul_name; + struct clk_wzrd *clk_wzrd = dev_get_drvdata(dev); + u32 regl, regh, edge, regld, reghd, edged, div; + const struct versal_clk_data *data; + unsigned long flags = 0; + bool is_versal = false; + void __iomem *ctrl_reg; + u32 reg, reg_f, mult; + int i; + + data = device_get_match_data(dev); + if (data) + is_versal = data->is_versal; + + clkout_name = devm_kasprintf(dev, GFP_KERNEL, "%s_out0", dev_name(dev)); + if (!clkout_name) + return -ENOMEM; + + if (is_versal) { + if (nr_outputs == 1) { + clk_wzrd->clk_data.hws[0] = clk_wzrd_ver_register_divider + (dev, clkout_name, + __clk_get_name(clk_wzrd->clk_in1), 0, + clk_wzrd->base, WZRD_CLK_CFG_REG(is_versal, 3), + WZRD_CLKOUT_DIVIDE_SHIFT, + WZRD_CLKOUT_DIVIDE_WIDTH, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + DIV_ALL, &clkwzrd_lock); + + return 0; + } + /* register multiplier */ + edge = !!(readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 0)) & + BIT(8)); + regl = (readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 1)) & + WZRD_CLKFBOUT_L_MASK) >> WZRD_CLKFBOUT_L_SHIFT; + regh = (readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 1)) & + WZRD_CLKFBOUT_H_MASK) >> WZRD_CLKFBOUT_H_SHIFT; + mult = regl + regh + edge; + if (!mult) + mult = 1; + mult = mult * WZRD_FRAC_GRADIENT; + + regl = readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 51)) & + WZRD_CLKFBOUT_FRAC_EN; + if (regl) { + regl = readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 48)) & + WZRD_VERSAL_FRAC_MASK; + mult = mult + regl; + } + div = 64; + } else { + if (nr_outputs == 1) { + clk_wzrd->clk_data.hws[0] = clk_wzrd_register_divider + (dev, clkout_name, + __clk_get_name(clk_wzrd->clk_in1), 0, + clk_wzrd->base, WZRD_CLK_CFG_REG(is_versal, 3), + WZRD_CLKOUT_DIVIDE_SHIFT, + WZRD_CLKOUT_DIVIDE_WIDTH, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + DIV_ALL, &clkwzrd_lock); + + return 0; + } + reg = readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 0)); + reg_f = reg & WZRD_CLKFBOUT_FRAC_MASK; + reg_f = reg_f >> WZRD_CLKFBOUT_FRAC_SHIFT; + + reg = reg & WZRD_CLKFBOUT_MULT_MASK; + reg = reg >> WZRD_CLKFBOUT_MULT_SHIFT; + mult = (reg * 1000) + reg_f; + div = 1000; + } + clk_name = devm_kasprintf(dev, GFP_KERNEL, "%s_mul", dev_name(dev)); + if (!clk_name) + return -ENOMEM; + clk_wzrd->clks_internal[wzrd_clk_mul] = devm_clk_hw_register_fixed_factor + (dev, clk_name, + __clk_get_name(clk_wzrd->clk_in1), + 0, mult, div); + if (IS_ERR(clk_wzrd->clks_internal[wzrd_clk_mul])) { + dev_err(dev, "unable to register fixed-factor clock\n"); + return PTR_ERR(clk_wzrd->clks_internal[wzrd_clk_mul]); + } + + clk_name = devm_kasprintf(dev, GFP_KERNEL, "%s_mul_div", dev_name(dev)); + if (!clk_name) + return -ENOMEM; + + if (is_versal) { + edged = !!(readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 20)) & + BIT(10)); + regld = (readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 21)) & + WZRD_CLKFBOUT_L_MASK) >> WZRD_CLKFBOUT_L_SHIFT; + reghd = (readl(clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 21)) & + WZRD_CLKFBOUT_H_MASK) >> WZRD_CLKFBOUT_H_SHIFT; + div = (regld + reghd + edged); + if (!div) + div = 1; + + clk_mul_name = clk_hw_get_name(clk_wzrd->clks_internal[wzrd_clk_mul]); + clk_wzrd->clks_internal[wzrd_clk_mul_div] = + devm_clk_hw_register_fixed_factor(dev, clk_name, clk_mul_name, 0, 1, div); + } else { + ctrl_reg = clk_wzrd->base + WZRD_CLK_CFG_REG(is_versal, 0); + clk_wzrd->clks_internal[wzrd_clk_mul_div] = devm_clk_hw_register_divider + (dev, clk_name, + clk_hw_get_name(clk_wzrd->clks_internal[wzrd_clk_mul]), + flags, ctrl_reg, 0, 8, CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, &clkwzrd_lock); + } + if (IS_ERR(clk_wzrd->clks_internal[wzrd_clk_mul_div])) { + dev_err(dev, "unable to register divider clock\n"); + return PTR_ERR(clk_wzrd->clks_internal[wzrd_clk_mul_div]); + } + + /* register div per output */ + for (i = nr_outputs - 1; i >= 0 ; i--) { + clkout_name = devm_kasprintf(dev, GFP_KERNEL, "%s_out%d", dev_name(dev), i); + if (!clkout_name) + return -ENOMEM; + + if (is_versal) { + clk_wzrd->clk_data.hws[i] = clk_wzrd_ver_register_divider + (dev, + clkout_name, clk_name, 0, + clk_wzrd->base, + (WZRD_CLK_CFG_REG(is_versal, 2) + i * 8), + WZRD_CLKOUT_DIVIDE_SHIFT, + WZRD_CLKOUT_DIVIDE_WIDTH, + CLK_DIVIDER_ONE_BASED | + CLK_DIVIDER_ALLOW_ZERO, + DIV_O, &clkwzrd_lock); + } else { + if (!i) + clk_wzrd->clk_data.hws[i] = clk_wzrd_register_divf + (dev, clkout_name, clk_name, flags, clk_wzrd->base, + (WZRD_CLK_CFG_REG(is_versal, 2) + i * 12), + WZRD_CLKOUT_DIVIDE_SHIFT, + WZRD_CLKOUT_DIVIDE_WIDTH, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + DIV_O, &clkwzrd_lock); + else + clk_wzrd->clk_data.hws[i] = clk_wzrd_register_divider + (dev, clkout_name, clk_name, 0, clk_wzrd->base, + (WZRD_CLK_CFG_REG(is_versal, 2) + i * 12), + WZRD_CLKOUT_DIVIDE_SHIFT, + WZRD_CLKOUT_DIVIDE_WIDTH, + CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO, + DIV_O, &clkwzrd_lock); + } + if (IS_ERR(clk_wzrd->clk_data.hws[i])) { + dev_err(dev, "unable to register divider clock\n"); + return PTR_ERR(clk_wzrd->clk_data.hws[i]); + } + } + + return 0; +} + +static int clk_wzrd_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct clk_wzrd *clk_wzrd; + unsigned long rate; + int nr_outputs; + int ret; + + ret = of_property_read_u32(np, "xlnx,nr-outputs", &nr_outputs); + if (ret || nr_outputs > WZRD_NUM_OUTPUTS) + return -EINVAL; + + clk_wzrd = devm_kzalloc(&pdev->dev, struct_size(clk_wzrd, clk_data.hws, nr_outputs), + GFP_KERNEL); + if (!clk_wzrd) + return -ENOMEM; + platform_set_drvdata(pdev, clk_wzrd); + + clk_wzrd->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(clk_wzrd->base)) + return PTR_ERR(clk_wzrd->base); + + clk_wzrd->axi_clk = devm_clk_get_enabled(&pdev->dev, "s_axi_aclk"); + if (IS_ERR(clk_wzrd->axi_clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(clk_wzrd->axi_clk), + "s_axi_aclk not found\n"); + rate = clk_get_rate(clk_wzrd->axi_clk); + if (rate > WZRD_ACLK_MAX_FREQ) { + dev_err(&pdev->dev, "s_axi_aclk frequency (%lu) too high\n", rate); + return -EINVAL; + } + + if (!of_property_present(np, "xlnx,static-config")) { + ret = of_property_read_u32(np, "xlnx,speed-grade", &clk_wzrd->speed_grade); + if (!ret) { + if (clk_wzrd->speed_grade < 1 || clk_wzrd->speed_grade > 3) { + dev_warn(&pdev->dev, "invalid speed grade '%d'\n", + clk_wzrd->speed_grade); + clk_wzrd->speed_grade = 0; + } + } + + clk_wzrd->clk_in1 = devm_clk_get(&pdev->dev, "clk_in1"); + if (IS_ERR(clk_wzrd->clk_in1)) + return dev_err_probe(&pdev->dev, PTR_ERR(clk_wzrd->clk_in1), + "clk_in1 not found\n"); + + ret = clk_wzrd_register_output_clocks(&pdev->dev, nr_outputs); + if (ret) + return ret; + + clk_wzrd->clk_data.num = nr_outputs; + ret = devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, + &clk_wzrd->clk_data); + if (ret) { + dev_err(&pdev->dev, "unable to register clock provider\n"); + return ret; + } + + if (clk_wzrd->speed_grade) { + clk_wzrd->nb.notifier_call = clk_wzrd_clk_notifier; + + ret = devm_clk_notifier_register(&pdev->dev, clk_wzrd->clk_in1, + &clk_wzrd->nb); + if (ret) + dev_warn(&pdev->dev, + "unable to register clock notifier\n"); + + ret = devm_clk_notifier_register(&pdev->dev, clk_wzrd->axi_clk, + &clk_wzrd->nb); + if (ret) + dev_warn(&pdev->dev, + "unable to register clock notifier\n"); + } + } + + return 0; +} + +static const struct of_device_id clk_wzrd_ids[] = { + { .compatible = "xlnx,versal-clk-wizard", .data = &versal_data }, + { .compatible = "xlnx,clocking-wizard" }, + { .compatible = "xlnx,clocking-wizard-v5.2" }, + { .compatible = "xlnx,clocking-wizard-v6.0" }, + { }, +}; +MODULE_DEVICE_TABLE(of, clk_wzrd_ids); + +static struct platform_driver clk_wzrd_driver = { + .driver = { + .name = "clk-wizard", + .of_match_table = clk_wzrd_ids, + .pm = &clk_wzrd_dev_pm_ops, + }, + .probe = clk_wzrd_probe, +}; +module_platform_driver(clk_wzrd_driver); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Soeren Brinkmann <soren.brinkmann@xilinx.com"); +MODULE_DESCRIPTION("Driver for the Xilinx Clocking Wizard IP core"); |