Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / clk / clk-vt8500.c
diff --git a/kernel/drivers/clk/clk-vt8500.c b/kernel/drivers/clk/clk-vt8500.c
new file mode 100644 (file)
index 0000000..37e9288
--- /dev/null
@@ -0,0 +1,720 @@
+/*
+ * Clock implementation for VIA/Wondermedia SoC's
+ * Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/bitops.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
+
+#define LEGACY_PMC_BASE                0xD8130000
+
+/* All clocks share the same lock as none can be changed concurrently */
+static DEFINE_SPINLOCK(_lock);
+
+struct clk_device {
+       struct clk_hw   hw;
+       void __iomem    *div_reg;
+       unsigned int    div_mask;
+       void __iomem    *en_reg;
+       int             en_bit;
+       spinlock_t      *lock;
+};
+
+/*
+ * Add new PLL_TYPE_x definitions here as required. Use the first known model
+ * to support the new type as the name.
+ * Add case statements to vtwm_pll_recalc_rate(), vtwm_pll_round_round() and
+ * vtwm_pll_set_rate() to handle the new PLL_TYPE_x
+ */
+
+#define PLL_TYPE_VT8500                0
+#define PLL_TYPE_WM8650                1
+#define PLL_TYPE_WM8750                2
+#define PLL_TYPE_WM8850                3
+
+struct clk_pll {
+       struct clk_hw   hw;
+       void __iomem    *reg;
+       spinlock_t      *lock;
+       int             type;
+};
+
+static void __iomem *pmc_base;
+
+static __init void vtwm_set_pmc_base(void)
+{
+       struct device_node *np =
+               of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");
+
+       if (np)
+               pmc_base = of_iomap(np, 0);
+       else
+               pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
+       of_node_put(np);
+
+       if (!pmc_base)
+               pr_err("%s:of_iomap(pmc) failed\n", __func__);
+}
+
+#define to_clk_device(_hw) container_of(_hw, struct clk_device, hw)
+
+#define VT8500_PMC_BUSY_MASK           0x18
+
+static void vt8500_pmc_wait_busy(void)
+{
+       while (readl(pmc_base) & VT8500_PMC_BUSY_MASK)
+               cpu_relax();
+}
+
+static int vt8500_dclk_enable(struct clk_hw *hw)
+{
+       struct clk_device *cdev = to_clk_device(hw);
+       u32 en_val;
+       unsigned long flags = 0;
+
+       spin_lock_irqsave(cdev->lock, flags);
+
+       en_val = readl(cdev->en_reg);
+       en_val |= BIT(cdev->en_bit);
+       writel(en_val, cdev->en_reg);
+
+       spin_unlock_irqrestore(cdev->lock, flags);
+       return 0;
+}
+
+static void vt8500_dclk_disable(struct clk_hw *hw)
+{
+       struct clk_device *cdev = to_clk_device(hw);
+       u32 en_val;
+       unsigned long flags = 0;
+
+       spin_lock_irqsave(cdev->lock, flags);
+
+       en_val = readl(cdev->en_reg);
+       en_val &= ~BIT(cdev->en_bit);
+       writel(en_val, cdev->en_reg);
+
+       spin_unlock_irqrestore(cdev->lock, flags);
+}
+
+static int vt8500_dclk_is_enabled(struct clk_hw *hw)
+{
+       struct clk_device *cdev = to_clk_device(hw);
+       u32 en_val = (readl(cdev->en_reg) & BIT(cdev->en_bit));
+
+       return en_val ? 1 : 0;
+}
+
+static unsigned long vt8500_dclk_recalc_rate(struct clk_hw *hw,
+                               unsigned long parent_rate)
+{
+       struct clk_device *cdev = to_clk_device(hw);
+       u32 div = readl(cdev->div_reg) & cdev->div_mask;
+
+       /* Special case for SDMMC devices */
+       if ((cdev->div_mask == 0x3F) && (div & BIT(5)))
+               div = 64 * (div & 0x1f);
+
+       /* div == 0 is actually the highest divisor */
+       if (div == 0)
+               div = (cdev->div_mask + 1);
+
+       return parent_rate / div;
+}
+
+static long vt8500_dclk_round_rate(struct clk_hw *hw, unsigned long rate,
+                               unsigned long *prate)
+{
+       struct clk_device *cdev = to_clk_device(hw);
+       u32 divisor;
+
+       if (rate == 0)
+               return 0;
+
+       divisor = *prate / rate;
+
+       /* If prate / rate would be decimal, incr the divisor */
+       if (rate * divisor < *prate)
+               divisor++;
+
+       /*
+        * If this is a request for SDMMC we have to adjust the divisor
+        * when >31 to use the fixed predivisor
+        */
+       if ((cdev->div_mask == 0x3F) && (divisor > 31)) {
+               divisor = 64 * ((divisor / 64) + 1);
+       }
+
+       return *prate / divisor;
+}
+
+static int vt8500_dclk_set_rate(struct clk_hw *hw, unsigned long rate,
+                               unsigned long parent_rate)
+{
+       struct clk_device *cdev = to_clk_device(hw);
+       u32 divisor;
+       unsigned long flags = 0;
+
+       if (rate == 0)
+               return 0;
+
+       divisor =  parent_rate / rate;
+
+       if (divisor == cdev->div_mask + 1)
+               divisor = 0;
+
+       /* SDMMC mask may need to be corrected before testing if its valid */
+       if ((cdev->div_mask == 0x3F) && (divisor > 31)) {
+               /*
+                * Bit 5 is a fixed /64 predivisor. If the requested divisor
+                * is >31 then correct for the fixed divisor being required.
+                */
+               divisor = 0x20 + (divisor / 64);
+       }
+
+       if (divisor > cdev->div_mask) {
+               pr_err("%s: invalid divisor for clock\n", __func__);
+               return -EINVAL;
+       }
+
+       spin_lock_irqsave(cdev->lock, flags);
+
+       vt8500_pmc_wait_busy();
+       writel(divisor, cdev->div_reg);
+       vt8500_pmc_wait_busy();
+
+       spin_unlock_irqrestore(cdev->lock, flags);
+
+       return 0;
+}
+
+
+static const struct clk_ops vt8500_gated_clk_ops = {
+       .enable = vt8500_dclk_enable,
+       .disable = vt8500_dclk_disable,
+       .is_enabled = vt8500_dclk_is_enabled,
+};
+
+static const struct clk_ops vt8500_divisor_clk_ops = {
+       .round_rate = vt8500_dclk_round_rate,
+       .set_rate = vt8500_dclk_set_rate,
+       .recalc_rate = vt8500_dclk_recalc_rate,
+};
+
+static const struct clk_ops vt8500_gated_divisor_clk_ops = {
+       .enable = vt8500_dclk_enable,
+       .disable = vt8500_dclk_disable,
+       .is_enabled = vt8500_dclk_is_enabled,
+       .round_rate = vt8500_dclk_round_rate,
+       .set_rate = vt8500_dclk_set_rate,
+       .recalc_rate = vt8500_dclk_recalc_rate,
+};
+
+#define CLK_INIT_GATED                 BIT(0)
+#define CLK_INIT_DIVISOR               BIT(1)
+#define CLK_INIT_GATED_DIVISOR         (CLK_INIT_DIVISOR | CLK_INIT_GATED)
+
+static __init void vtwm_device_clk_init(struct device_node *node)
+{
+       u32 en_reg, div_reg;
+       struct clk *clk;
+       struct clk_device *dev_clk;
+       const char *clk_name = node->name;
+       const char *parent_name;
+       struct clk_init_data init;
+       int rc;
+       int clk_init_flags = 0;
+
+       if (!pmc_base)
+               vtwm_set_pmc_base();
+
+       dev_clk = kzalloc(sizeof(*dev_clk), GFP_KERNEL);
+       if (WARN_ON(!dev_clk))
+               return;
+
+       dev_clk->lock = &_lock;
+
+       rc = of_property_read_u32(node, "enable-reg", &en_reg);
+       if (!rc) {
+               dev_clk->en_reg = pmc_base + en_reg;
+               rc = of_property_read_u32(node, "enable-bit", &dev_clk->en_bit);
+               if (rc) {
+                       pr_err("%s: enable-bit property required for gated clock\n",
+                                                               __func__);
+                       return;
+               }
+               clk_init_flags |= CLK_INIT_GATED;
+       }
+
+       rc = of_property_read_u32(node, "divisor-reg", &div_reg);
+       if (!rc) {
+               dev_clk->div_reg = pmc_base + div_reg;
+               /*
+                * use 0x1f as the default mask since it covers
+                * almost all the clocks and reduces dts properties
+                */
+               dev_clk->div_mask = 0x1f;
+
+               of_property_read_u32(node, "divisor-mask", &dev_clk->div_mask);
+               clk_init_flags |= CLK_INIT_DIVISOR;
+       }
+
+       of_property_read_string(node, "clock-output-names", &clk_name);
+
+       switch (clk_init_flags) {
+       case CLK_INIT_GATED:
+               init.ops = &vt8500_gated_clk_ops;
+               break;
+       case CLK_INIT_DIVISOR:
+               init.ops = &vt8500_divisor_clk_ops;
+               break;
+       case CLK_INIT_GATED_DIVISOR:
+               init.ops = &vt8500_gated_divisor_clk_ops;
+               break;
+       default:
+               pr_err("%s: Invalid clock description in device tree\n",
+                                                               __func__);
+               kfree(dev_clk);
+               return;
+       }
+
+       init.name = clk_name;
+       init.flags = 0;
+       parent_name = of_clk_get_parent_name(node, 0);
+       init.parent_names = &parent_name;
+       init.num_parents = 1;
+
+       dev_clk->hw.init = &init;
+
+       clk = clk_register(NULL, &dev_clk->hw);
+       if (WARN_ON(IS_ERR(clk))) {
+               kfree(dev_clk);
+               return;
+       }
+       rc = of_clk_add_provider(node, of_clk_src_simple_get, clk);
+       clk_register_clkdev(clk, clk_name, NULL);
+}
+CLK_OF_DECLARE(vt8500_device, "via,vt8500-device-clock", vtwm_device_clk_init);
+
+/* PLL clock related functions */
+
+#define to_clk_pll(_hw) container_of(_hw, struct clk_pll, hw)
+
+/* Helper macros for PLL_VT8500 */
+#define VT8500_PLL_MUL(x)      ((x & 0x1F) << 1)
+#define VT8500_PLL_DIV(x)      ((x & 0x100) ? 1 : 2)
+
+#define VT8500_BITS_TO_FREQ(r, m, d)                                   \
+                               ((r / d) * m)
+
+#define VT8500_BITS_TO_VAL(m, d)                                       \
+                               ((d == 2 ? 0 : 0x100) | ((m >> 1) & 0x1F))
+
+/* Helper macros for PLL_WM8650 */
+#define WM8650_PLL_MUL(x)      (x & 0x3FF)
+#define WM8650_PLL_DIV(x)      (((x >> 10) & 7) * (1 << ((x >> 13) & 3)))
+
+#define WM8650_BITS_TO_FREQ(r, m, d1, d2)                              \
+                               (r * m / (d1 * (1 << d2)))
+
+#define WM8650_BITS_TO_VAL(m, d1, d2)                                  \
+                               ((d2 << 13) | (d1 << 10) | (m & 0x3FF))
+
+/* Helper macros for PLL_WM8750 */
+#define WM8750_PLL_MUL(x)      (((x >> 16) & 0xFF) + 1)
+#define WM8750_PLL_DIV(x)      ((((x >> 8) & 1) + 1) * (1 << (x & 7)))
+
+#define WM8750_BITS_TO_FREQ(r, m, d1, d2)                              \
+                               (r * (m+1) / ((d1+1) * (1 << d2)))
+
+#define WM8750_BITS_TO_VAL(f, m, d1, d2)                               \
+               ((f << 24) | ((m - 1) << 16) | ((d1 - 1) << 8) | d2)
+
+/* Helper macros for PLL_WM8850 */
+#define WM8850_PLL_MUL(x)      ((((x >> 16) & 0x7F) + 1) * 2)
+#define WM8850_PLL_DIV(x)      ((((x >> 8) & 1) + 1) * (1 << (x & 3)))
+
+#define WM8850_BITS_TO_FREQ(r, m, d1, d2)                              \
+                               (r * ((m + 1) * 2) / ((d1+1) * (1 << d2)))
+
+#define WM8850_BITS_TO_VAL(m, d1, d2)                                  \
+               ((((m / 2) - 1) << 16) | ((d1 - 1) << 8) | d2)
+
+static void vt8500_find_pll_bits(unsigned long rate, unsigned long parent_rate,
+                               u32 *multiplier, u32 *prediv)
+{
+       unsigned long tclk;
+
+       /* sanity check */
+       if ((rate < parent_rate * 4) || (rate > parent_rate * 62)) {
+               pr_err("%s: requested rate out of range\n", __func__);
+               *multiplier = 0;
+               *prediv = 1;
+               return;
+       }
+       if (rate <= parent_rate * 31)
+               /* use the prediv to double the resolution */
+               *prediv = 2;
+       else
+               *prediv = 1;
+
+       *multiplier = rate / (parent_rate / *prediv);
+       tclk = (parent_rate / *prediv) * *multiplier;
+
+       if (tclk != rate)
+               pr_warn("%s: requested rate %lu, found rate %lu\n", __func__,
+                                                               rate, tclk);
+}
+
+static void wm8650_find_pll_bits(unsigned long rate, unsigned long parent_rate,
+                               u32 *multiplier, u32 *divisor1, u32 *divisor2)
+{
+       u32 mul, div1, div2;
+       u32 best_mul, best_div1, best_div2;
+       unsigned long tclk, rate_err, best_err;
+
+       best_err = (unsigned long)-1;
+
+       /* Find the closest match (lower or equal to requested) */
+       for (div1 = 5; div1 >= 3; div1--)
+               for (div2 = 3; div2 >= 0; div2--)
+                       for (mul = 3; mul <= 1023; mul++) {
+                               tclk = parent_rate * mul / (div1 * (1 << div2));
+                               if (tclk > rate)
+                                       continue;
+                               /* error will always be +ve */
+                               rate_err = rate - tclk;
+                               if (rate_err == 0) {
+                                       *multiplier = mul;
+                                       *divisor1 = div1;
+                                       *divisor2 = div2;
+                                       return;
+                               }
+
+                               if (rate_err < best_err) {
+                                       best_err = rate_err;
+                                       best_mul = mul;
+                                       best_div1 = div1;
+                                       best_div2 = div2;
+                               }
+                       }
+
+       /* if we got here, it wasn't an exact match */
+       pr_warn("%s: requested rate %lu, found rate %lu\n", __func__, rate,
+                                                       rate - best_err);
+       *multiplier = best_mul;
+       *divisor1 = best_div1;
+       *divisor2 = best_div2;
+}
+
+static u32 wm8750_get_filter(u32 parent_rate, u32 divisor1)
+{
+       /* calculate frequency (MHz) after pre-divisor */
+       u32 freq = (parent_rate / 1000000) / (divisor1 + 1);
+
+       if ((freq < 10) || (freq > 200))
+               pr_warn("%s: PLL recommended input frequency 10..200Mhz (requested %d Mhz)\n",
+                               __func__, freq);
+
+       if (freq >= 166)
+               return 7;
+       else if (freq >= 104)
+               return 6;
+       else if (freq >= 65)
+               return 5;
+       else if (freq >= 42)
+               return 4;
+       else if (freq >= 26)
+               return 3;
+       else if (freq >= 16)
+               return 2;
+       else if (freq >= 10)
+               return 1;
+
+       return 0;
+}
+
+static void wm8750_find_pll_bits(unsigned long rate, unsigned long parent_rate,
+                               u32 *filter, u32 *multiplier, u32 *divisor1, u32 *divisor2)
+{
+       u32 mul, div1, div2;
+       u32 best_mul, best_div1, best_div2;
+       unsigned long tclk, rate_err, best_err;
+
+       best_err = (unsigned long)-1;
+
+       /* Find the closest match (lower or equal to requested) */
+       for (div1 = 1; div1 >= 0; div1--)
+               for (div2 = 7; div2 >= 0; div2--)
+                       for (mul = 0; mul <= 255; mul++) {
+                               tclk = parent_rate * (mul + 1) / ((div1 + 1) * (1 << div2));
+                               if (tclk > rate)
+                                       continue;
+                               /* error will always be +ve */
+                               rate_err = rate - tclk;
+                               if (rate_err == 0) {
+                                       *filter = wm8750_get_filter(parent_rate, div1);
+                                       *multiplier = mul;
+                                       *divisor1 = div1;
+                                       *divisor2 = div2;
+                                       return;
+                               }
+
+                               if (rate_err < best_err) {
+                                       best_err = rate_err;
+                                       best_mul = mul;
+                                       best_div1 = div1;
+                                       best_div2 = div2;
+                               }
+                       }
+
+       /* if we got here, it wasn't an exact match */
+       pr_warn("%s: requested rate %lu, found rate %lu\n", __func__, rate,
+                                                       rate - best_err);
+
+       *filter = wm8750_get_filter(parent_rate, best_div1);
+       *multiplier = best_mul;
+       *divisor1 = best_div1;
+       *divisor2 = best_div2;
+}
+
+static void wm8850_find_pll_bits(unsigned long rate, unsigned long parent_rate,
+                               u32 *multiplier, u32 *divisor1, u32 *divisor2)
+{
+       u32 mul, div1, div2;
+       u32 best_mul, best_div1, best_div2;
+       unsigned long tclk, rate_err, best_err;
+
+       best_err = (unsigned long)-1;
+
+       /* Find the closest match (lower or equal to requested) */
+       for (div1 = 1; div1 >= 0; div1--)
+               for (div2 = 3; div2 >= 0; div2--)
+                       for (mul = 0; mul <= 127; mul++) {
+                               tclk = parent_rate * ((mul + 1) * 2) /
+                                               ((div1 + 1) * (1 << div2));
+                               if (tclk > rate)
+                                       continue;
+                               /* error will always be +ve */
+                               rate_err = rate - tclk;
+                               if (rate_err == 0) {
+                                       *multiplier = mul;
+                                       *divisor1 = div1;
+                                       *divisor2 = div2;
+                                       return;
+                               }
+
+                               if (rate_err < best_err) {
+                                       best_err = rate_err;
+                                       best_mul = mul;
+                                       best_div1 = div1;
+                                       best_div2 = div2;
+                               }
+                       }
+
+       /* if we got here, it wasn't an exact match */
+       pr_warn("%s: requested rate %lu, found rate %lu\n", __func__, rate,
+                                                       rate - best_err);
+
+       *multiplier = best_mul;
+       *divisor1 = best_div1;
+       *divisor2 = best_div2;
+}
+
+static int vtwm_pll_set_rate(struct clk_hw *hw, unsigned long rate,
+                               unsigned long parent_rate)
+{
+       struct clk_pll *pll = to_clk_pll(hw);
+       u32 filter, mul, div1, div2;
+       u32 pll_val;
+       unsigned long flags = 0;
+
+       /* sanity check */
+
+       switch (pll->type) {
+       case PLL_TYPE_VT8500:
+               vt8500_find_pll_bits(rate, parent_rate, &mul, &div1);
+               pll_val = VT8500_BITS_TO_VAL(mul, div1);
+               break;
+       case PLL_TYPE_WM8650:
+               wm8650_find_pll_bits(rate, parent_rate, &mul, &div1, &div2);
+               pll_val = WM8650_BITS_TO_VAL(mul, div1, div2);
+               break;
+       case PLL_TYPE_WM8750:
+               wm8750_find_pll_bits(rate, parent_rate, &filter, &mul, &div1, &div2);
+               pll_val = WM8750_BITS_TO_VAL(filter, mul, div1, div2);
+               break;
+       case PLL_TYPE_WM8850:
+               wm8850_find_pll_bits(rate, parent_rate, &mul, &div1, &div2);
+               pll_val = WM8850_BITS_TO_VAL(mul, div1, div2);
+               break;
+       default:
+               pr_err("%s: invalid pll type\n", __func__);
+               return 0;
+       }
+
+       spin_lock_irqsave(pll->lock, flags);
+
+       vt8500_pmc_wait_busy();
+       writel(pll_val, pll->reg);
+       vt8500_pmc_wait_busy();
+
+       spin_unlock_irqrestore(pll->lock, flags);
+
+       return 0;
+}
+
+static long vtwm_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+                               unsigned long *prate)
+{
+       struct clk_pll *pll = to_clk_pll(hw);
+       u32 filter, mul, div1, div2;
+       long round_rate;
+
+       switch (pll->type) {
+       case PLL_TYPE_VT8500:
+               vt8500_find_pll_bits(rate, *prate, &mul, &div1);
+               round_rate = VT8500_BITS_TO_FREQ(*prate, mul, div1);
+               break;
+       case PLL_TYPE_WM8650:
+               wm8650_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+               round_rate = WM8650_BITS_TO_FREQ(*prate, mul, div1, div2);
+               break;
+       case PLL_TYPE_WM8750:
+               wm8750_find_pll_bits(rate, *prate, &filter, &mul, &div1, &div2);
+               round_rate = WM8750_BITS_TO_FREQ(*prate, mul, div1, div2);
+               break;
+       case PLL_TYPE_WM8850:
+               wm8850_find_pll_bits(rate, *prate, &mul, &div1, &div2);
+               round_rate = WM8850_BITS_TO_FREQ(*prate, mul, div1, div2);
+               break;
+       default:
+               round_rate = 0;
+       }
+
+       return round_rate;
+}
+
+static unsigned long vtwm_pll_recalc_rate(struct clk_hw *hw,
+                               unsigned long parent_rate)
+{
+       struct clk_pll *pll = to_clk_pll(hw);
+       u32 pll_val = readl(pll->reg);
+       unsigned long pll_freq;
+
+       switch (pll->type) {
+       case PLL_TYPE_VT8500:
+               pll_freq = parent_rate * VT8500_PLL_MUL(pll_val);
+               pll_freq /= VT8500_PLL_DIV(pll_val);
+               break;
+       case PLL_TYPE_WM8650:
+               pll_freq = parent_rate * WM8650_PLL_MUL(pll_val);
+               pll_freq /= WM8650_PLL_DIV(pll_val);
+               break;
+       case PLL_TYPE_WM8750:
+               pll_freq = parent_rate * WM8750_PLL_MUL(pll_val);
+               pll_freq /= WM8750_PLL_DIV(pll_val);
+               break;
+       case PLL_TYPE_WM8850:
+               pll_freq = parent_rate * WM8850_PLL_MUL(pll_val);
+               pll_freq /= WM8850_PLL_DIV(pll_val);
+               break;
+       default:
+               pll_freq = 0;
+       }
+
+       return pll_freq;
+}
+
+static const struct clk_ops vtwm_pll_ops = {
+       .round_rate = vtwm_pll_round_rate,
+       .set_rate = vtwm_pll_set_rate,
+       .recalc_rate = vtwm_pll_recalc_rate,
+};
+
+static __init void vtwm_pll_clk_init(struct device_node *node, int pll_type)
+{
+       u32 reg;
+       struct clk *clk;
+       struct clk_pll *pll_clk;
+       const char *clk_name = node->name;
+       const char *parent_name;
+       struct clk_init_data init;
+       int rc;
+
+       if (!pmc_base)
+               vtwm_set_pmc_base();
+
+       rc = of_property_read_u32(node, "reg", &reg);
+       if (WARN_ON(rc))
+               return;
+
+       pll_clk = kzalloc(sizeof(*pll_clk), GFP_KERNEL);
+       if (WARN_ON(!pll_clk))
+               return;
+
+       pll_clk->reg = pmc_base + reg;
+       pll_clk->lock = &_lock;
+       pll_clk->type = pll_type;
+
+       of_property_read_string(node, "clock-output-names", &clk_name);
+
+       init.name = clk_name;
+       init.ops = &vtwm_pll_ops;
+       init.flags = 0;
+       parent_name = of_clk_get_parent_name(node, 0);
+       init.parent_names = &parent_name;
+       init.num_parents = 1;
+
+       pll_clk->hw.init = &init;
+
+       clk = clk_register(NULL, &pll_clk->hw);
+       if (WARN_ON(IS_ERR(clk))) {
+               kfree(pll_clk);
+               return;
+       }
+       rc = of_clk_add_provider(node, of_clk_src_simple_get, clk);
+       clk_register_clkdev(clk, clk_name, NULL);
+}
+
+
+/* Wrappers for initialization functions */
+
+static void __init vt8500_pll_init(struct device_node *node)
+{
+       vtwm_pll_clk_init(node, PLL_TYPE_VT8500);
+}
+CLK_OF_DECLARE(vt8500_pll, "via,vt8500-pll-clock", vt8500_pll_init);
+
+static void __init wm8650_pll_init(struct device_node *node)
+{
+       vtwm_pll_clk_init(node, PLL_TYPE_WM8650);
+}
+CLK_OF_DECLARE(wm8650_pll, "wm,wm8650-pll-clock", wm8650_pll_init);
+
+static void __init wm8750_pll_init(struct device_node *node)
+{
+       vtwm_pll_clk_init(node, PLL_TYPE_WM8750);
+}
+CLK_OF_DECLARE(wm8750_pll, "wm,wm8750-pll-clock", wm8750_pll_init);
+
+static void __init wm8850_pll_init(struct device_node *node)
+{
+       vtwm_pll_clk_init(node, PLL_TYPE_WM8850);
+}
+CLK_OF_DECLARE(wm8850_pll, "wm,wm8850-pll-clock", wm8850_pll_init);