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Diffstat (limited to 'kernel/arch/arm/mach-imx/clk-pllv3.c')
-rw-r--r--kernel/arch/arm/mach-imx/clk-pllv3.c331
1 files changed, 0 insertions, 331 deletions
diff --git a/kernel/arch/arm/mach-imx/clk-pllv3.c b/kernel/arch/arm/mach-imx/clk-pllv3.c
deleted file mode 100644
index 641ebc508..000000000
--- a/kernel/arch/arm/mach-imx/clk-pllv3.c
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
- * Copyright 2012 Freescale Semiconductor, Inc.
- * Copyright 2012 Linaro Ltd.
- *
- * The code contained herein is licensed under the GNU General Public
- * License. You may obtain a copy of the GNU General Public License
- * Version 2 or later at the following locations:
- *
- * http://www.opensource.org/licenses/gpl-license.html
- * http://www.gnu.org/copyleft/gpl.html
- */
-
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/err.h>
-#include "clk.h"
-
-#define PLL_NUM_OFFSET 0x10
-#define PLL_DENOM_OFFSET 0x20
-
-#define BM_PLL_POWER (0x1 << 12)
-#define BM_PLL_LOCK (0x1 << 31)
-
-/**
- * struct clk_pllv3 - IMX PLL clock version 3
- * @clk_hw: clock source
- * @base: base address of PLL registers
- * @powerup_set: set POWER bit to power up the PLL
- * @div_mask: mask of divider bits
- * @div_shift: shift of divider bits
- *
- * IMX PLL clock version 3, found on i.MX6 series. Divider for pllv3
- * is actually a multiplier, and always sits at bit 0.
- */
-struct clk_pllv3 {
- struct clk_hw hw;
- void __iomem *base;
- bool powerup_set;
- u32 div_mask;
- u32 div_shift;
-};
-
-#define to_clk_pllv3(_hw) container_of(_hw, struct clk_pllv3, hw)
-
-static int clk_pllv3_wait_lock(struct clk_pllv3 *pll)
-{
- unsigned long timeout = jiffies + msecs_to_jiffies(10);
- u32 val = readl_relaxed(pll->base) & BM_PLL_POWER;
-
- /* No need to wait for lock when pll is not powered up */
- if ((pll->powerup_set && !val) || (!pll->powerup_set && val))
- return 0;
-
- /* Wait for PLL to lock */
- do {
- if (readl_relaxed(pll->base) & BM_PLL_LOCK)
- break;
- if (time_after(jiffies, timeout))
- break;
- usleep_range(50, 500);
- } while (1);
-
- return readl_relaxed(pll->base) & BM_PLL_LOCK ? 0 : -ETIMEDOUT;
-}
-
-static int clk_pllv3_prepare(struct clk_hw *hw)
-{
- struct clk_pllv3 *pll = to_clk_pllv3(hw);
- u32 val;
-
- val = readl_relaxed(pll->base);
- if (pll->powerup_set)
- val |= BM_PLL_POWER;
- else
- val &= ~BM_PLL_POWER;
- writel_relaxed(val, pll->base);
-
- return clk_pllv3_wait_lock(pll);
-}
-
-static void clk_pllv3_unprepare(struct clk_hw *hw)
-{
- struct clk_pllv3 *pll = to_clk_pllv3(hw);
- u32 val;
-
- val = readl_relaxed(pll->base);
- if (pll->powerup_set)
- val &= ~BM_PLL_POWER;
- else
- val |= BM_PLL_POWER;
- writel_relaxed(val, pll->base);
-}
-
-static unsigned long clk_pllv3_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct clk_pllv3 *pll = to_clk_pllv3(hw);
- u32 div = (readl_relaxed(pll->base) >> pll->div_shift) & pll->div_mask;
-
- return (div == 1) ? parent_rate * 22 : parent_rate * 20;
-}
-
-static long clk_pllv3_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
-{
- unsigned long parent_rate = *prate;
-
- return (rate >= parent_rate * 22) ? parent_rate * 22 :
- parent_rate * 20;
-}
-
-static int clk_pllv3_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct clk_pllv3 *pll = to_clk_pllv3(hw);
- u32 val, div;
-
- if (rate == parent_rate * 22)
- div = 1;
- else if (rate == parent_rate * 20)
- div = 0;
- else
- return -EINVAL;
-
- val = readl_relaxed(pll->base);
- val &= ~(pll->div_mask << pll->div_shift);
- val |= (div << pll->div_shift);
- writel_relaxed(val, pll->base);
-
- return clk_pllv3_wait_lock(pll);
-}
-
-static const struct clk_ops clk_pllv3_ops = {
- .prepare = clk_pllv3_prepare,
- .unprepare = clk_pllv3_unprepare,
- .recalc_rate = clk_pllv3_recalc_rate,
- .round_rate = clk_pllv3_round_rate,
- .set_rate = clk_pllv3_set_rate,
-};
-
-static unsigned long clk_pllv3_sys_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct clk_pllv3 *pll = to_clk_pllv3(hw);
- u32 div = readl_relaxed(pll->base) & pll->div_mask;
-
- return parent_rate * div / 2;
-}
-
-static long clk_pllv3_sys_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
-{
- unsigned long parent_rate = *prate;
- unsigned long min_rate = parent_rate * 54 / 2;
- unsigned long max_rate = parent_rate * 108 / 2;
- u32 div;
-
- if (rate > max_rate)
- rate = max_rate;
- else if (rate < min_rate)
- rate = min_rate;
- div = rate * 2 / parent_rate;
-
- return parent_rate * div / 2;
-}
-
-static int clk_pllv3_sys_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct clk_pllv3 *pll = to_clk_pllv3(hw);
- unsigned long min_rate = parent_rate * 54 / 2;
- unsigned long max_rate = parent_rate * 108 / 2;
- u32 val, div;
-
- if (rate < min_rate || rate > max_rate)
- return -EINVAL;
-
- div = rate * 2 / parent_rate;
- val = readl_relaxed(pll->base);
- val &= ~pll->div_mask;
- val |= div;
- writel_relaxed(val, pll->base);
-
- return clk_pllv3_wait_lock(pll);
-}
-
-static const struct clk_ops clk_pllv3_sys_ops = {
- .prepare = clk_pllv3_prepare,
- .unprepare = clk_pllv3_unprepare,
- .recalc_rate = clk_pllv3_sys_recalc_rate,
- .round_rate = clk_pllv3_sys_round_rate,
- .set_rate = clk_pllv3_sys_set_rate,
-};
-
-static unsigned long clk_pllv3_av_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct clk_pllv3 *pll = to_clk_pllv3(hw);
- u32 mfn = readl_relaxed(pll->base + PLL_NUM_OFFSET);
- u32 mfd = readl_relaxed(pll->base + PLL_DENOM_OFFSET);
- u32 div = readl_relaxed(pll->base) & pll->div_mask;
-
- return (parent_rate * div) + ((parent_rate / mfd) * mfn);
-}
-
-static long clk_pllv3_av_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
-{
- unsigned long parent_rate = *prate;
- unsigned long min_rate = parent_rate * 27;
- unsigned long max_rate = parent_rate * 54;
- u32 div;
- u32 mfn, mfd = 1000000;
- s64 temp64;
-
- if (rate > max_rate)
- rate = max_rate;
- else if (rate < min_rate)
- rate = min_rate;
-
- div = rate / parent_rate;
- temp64 = (u64) (rate - div * parent_rate);
- temp64 *= mfd;
- do_div(temp64, parent_rate);
- mfn = temp64;
-
- return parent_rate * div + parent_rate / mfd * mfn;
-}
-
-static int clk_pllv3_av_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct clk_pllv3 *pll = to_clk_pllv3(hw);
- unsigned long min_rate = parent_rate * 27;
- unsigned long max_rate = parent_rate * 54;
- u32 val, div;
- u32 mfn, mfd = 1000000;
- s64 temp64;
-
- if (rate < min_rate || rate > max_rate)
- return -EINVAL;
-
- div = rate / parent_rate;
- temp64 = (u64) (rate - div * parent_rate);
- temp64 *= mfd;
- do_div(temp64, parent_rate);
- mfn = temp64;
-
- val = readl_relaxed(pll->base);
- val &= ~pll->div_mask;
- val |= div;
- writel_relaxed(val, pll->base);
- writel_relaxed(mfn, pll->base + PLL_NUM_OFFSET);
- writel_relaxed(mfd, pll->base + PLL_DENOM_OFFSET);
-
- return clk_pllv3_wait_lock(pll);
-}
-
-static const struct clk_ops clk_pllv3_av_ops = {
- .prepare = clk_pllv3_prepare,
- .unprepare = clk_pllv3_unprepare,
- .recalc_rate = clk_pllv3_av_recalc_rate,
- .round_rate = clk_pllv3_av_round_rate,
- .set_rate = clk_pllv3_av_set_rate,
-};
-
-static unsigned long clk_pllv3_enet_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- return 500000000;
-}
-
-static const struct clk_ops clk_pllv3_enet_ops = {
- .prepare = clk_pllv3_prepare,
- .unprepare = clk_pllv3_unprepare,
- .recalc_rate = clk_pllv3_enet_recalc_rate,
-};
-
-struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
- const char *parent_name, void __iomem *base,
- u32 div_mask)
-{
- struct clk_pllv3 *pll;
- const struct clk_ops *ops;
- struct clk *clk;
- struct clk_init_data init;
-
- pll = kzalloc(sizeof(*pll), GFP_KERNEL);
- if (!pll)
- return ERR_PTR(-ENOMEM);
-
- switch (type) {
- case IMX_PLLV3_SYS:
- ops = &clk_pllv3_sys_ops;
- break;
- case IMX_PLLV3_USB_VF610:
- pll->div_shift = 1;
- case IMX_PLLV3_USB:
- ops = &clk_pllv3_ops;
- pll->powerup_set = true;
- break;
- case IMX_PLLV3_AV:
- ops = &clk_pllv3_av_ops;
- break;
- case IMX_PLLV3_ENET:
- ops = &clk_pllv3_enet_ops;
- break;
- default:
- ops = &clk_pllv3_ops;
- }
- pll->base = base;
- pll->div_mask = div_mask;
-
- init.name = name;
- init.ops = ops;
- init.flags = 0;
- init.parent_names = &parent_name;
- init.num_parents = 1;
-
- pll->hw.init = &init;
-
- clk = clk_register(NULL, &pll->hw);
- if (IS_ERR(clk))
- kfree(pll);
-
- return clk;
-}