diff options
author | 2016-04-11 10:41:07 +0300 | |
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committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arm/mach-imx/clk-pllv2.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/arm/mach-imx/clk-pllv2.c')
-rw-r--r-- | kernel/arch/arm/mach-imx/clk-pllv2.c | 266 |
1 files changed, 0 insertions, 266 deletions
diff --git a/kernel/arch/arm/mach-imx/clk-pllv2.c b/kernel/arch/arm/mach-imx/clk-pllv2.c deleted file mode 100644 index 20889d59b..000000000 --- a/kernel/arch/arm/mach-imx/clk-pllv2.c +++ /dev/null @@ -1,266 +0,0 @@ -#include <linux/kernel.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/errno.h> -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/err.h> - -#include <asm/div64.h> - -#include "clk.h" - -#define to_clk_pllv2(clk) (container_of(clk, struct clk_pllv2, clk)) - -/* PLL Register Offsets */ -#define MXC_PLL_DP_CTL 0x00 -#define MXC_PLL_DP_CONFIG 0x04 -#define MXC_PLL_DP_OP 0x08 -#define MXC_PLL_DP_MFD 0x0C -#define MXC_PLL_DP_MFN 0x10 -#define MXC_PLL_DP_MFNMINUS 0x14 -#define MXC_PLL_DP_MFNPLUS 0x18 -#define MXC_PLL_DP_HFS_OP 0x1C -#define MXC_PLL_DP_HFS_MFD 0x20 -#define MXC_PLL_DP_HFS_MFN 0x24 -#define MXC_PLL_DP_MFN_TOGC 0x28 -#define MXC_PLL_DP_DESTAT 0x2c - -/* PLL Register Bit definitions */ -#define MXC_PLL_DP_CTL_MUL_CTRL 0x2000 -#define MXC_PLL_DP_CTL_DPDCK0_2_EN 0x1000 -#define MXC_PLL_DP_CTL_DPDCK0_2_OFFSET 12 -#define MXC_PLL_DP_CTL_ADE 0x800 -#define MXC_PLL_DP_CTL_REF_CLK_DIV 0x400 -#define MXC_PLL_DP_CTL_REF_CLK_SEL_MASK (3 << 8) -#define MXC_PLL_DP_CTL_REF_CLK_SEL_OFFSET 8 -#define MXC_PLL_DP_CTL_HFSM 0x80 -#define MXC_PLL_DP_CTL_PRE 0x40 -#define MXC_PLL_DP_CTL_UPEN 0x20 -#define MXC_PLL_DP_CTL_RST 0x10 -#define MXC_PLL_DP_CTL_RCP 0x8 -#define MXC_PLL_DP_CTL_PLM 0x4 -#define MXC_PLL_DP_CTL_BRM0 0x2 -#define MXC_PLL_DP_CTL_LRF 0x1 - -#define MXC_PLL_DP_CONFIG_BIST 0x8 -#define MXC_PLL_DP_CONFIG_SJC_CE 0x4 -#define MXC_PLL_DP_CONFIG_AREN 0x2 -#define MXC_PLL_DP_CONFIG_LDREQ 0x1 - -#define MXC_PLL_DP_OP_MFI_OFFSET 4 -#define MXC_PLL_DP_OP_MFI_MASK (0xF << 4) -#define MXC_PLL_DP_OP_PDF_OFFSET 0 -#define MXC_PLL_DP_OP_PDF_MASK 0xF - -#define MXC_PLL_DP_MFD_OFFSET 0 -#define MXC_PLL_DP_MFD_MASK 0x07FFFFFF - -#define MXC_PLL_DP_MFN_OFFSET 0x0 -#define MXC_PLL_DP_MFN_MASK 0x07FFFFFF - -#define MXC_PLL_DP_MFN_TOGC_TOG_DIS (1 << 17) -#define MXC_PLL_DP_MFN_TOGC_TOG_EN (1 << 16) -#define MXC_PLL_DP_MFN_TOGC_CNT_OFFSET 0x0 -#define MXC_PLL_DP_MFN_TOGC_CNT_MASK 0xFFFF - -#define MXC_PLL_DP_DESTAT_TOG_SEL (1 << 31) -#define MXC_PLL_DP_DESTAT_MFN 0x07FFFFFF - -#define MAX_DPLL_WAIT_TRIES 1000 /* 1000 * udelay(1) = 1ms */ - -struct clk_pllv2 { - struct clk_hw hw; - void __iomem *base; -}; - -static unsigned long __clk_pllv2_recalc_rate(unsigned long parent_rate, - u32 dp_ctl, u32 dp_op, u32 dp_mfd, u32 dp_mfn) -{ - long mfi, mfn, mfd, pdf, ref_clk, mfn_abs; - unsigned long dbl; - s64 temp; - - dbl = dp_ctl & MXC_PLL_DP_CTL_DPDCK0_2_EN; - - pdf = dp_op & MXC_PLL_DP_OP_PDF_MASK; - mfi = (dp_op & MXC_PLL_DP_OP_MFI_MASK) >> MXC_PLL_DP_OP_MFI_OFFSET; - mfi = (mfi <= 5) ? 5 : mfi; - mfd = dp_mfd & MXC_PLL_DP_MFD_MASK; - mfn = mfn_abs = dp_mfn & MXC_PLL_DP_MFN_MASK; - /* Sign extend to 32-bits */ - if (mfn >= 0x04000000) { - mfn |= 0xFC000000; - mfn_abs = -mfn; - } - - ref_clk = 2 * parent_rate; - if (dbl != 0) - ref_clk *= 2; - - ref_clk /= (pdf + 1); - temp = (u64) ref_clk * mfn_abs; - do_div(temp, mfd + 1); - if (mfn < 0) - temp = -temp; - temp = (ref_clk * mfi) + temp; - - return temp; -} - -static unsigned long clk_pllv2_recalc_rate(struct clk_hw *hw, - unsigned long parent_rate) -{ - u32 dp_op, dp_mfd, dp_mfn, dp_ctl; - void __iomem *pllbase; - struct clk_pllv2 *pll = to_clk_pllv2(hw); - - pllbase = pll->base; - - dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL); - dp_op = __raw_readl(pllbase + MXC_PLL_DP_OP); - dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_MFD); - dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_MFN); - - return __clk_pllv2_recalc_rate(parent_rate, dp_ctl, dp_op, dp_mfd, dp_mfn); -} - -static int __clk_pllv2_set_rate(unsigned long rate, unsigned long parent_rate, - u32 *dp_op, u32 *dp_mfd, u32 *dp_mfn) -{ - u32 reg; - long mfi, pdf, mfn, mfd = 999999; - s64 temp64; - unsigned long quad_parent_rate; - - quad_parent_rate = 4 * parent_rate; - pdf = mfi = -1; - while (++pdf < 16 && mfi < 5) - mfi = rate * (pdf+1) / quad_parent_rate; - if (mfi > 15) - return -EINVAL; - pdf--; - - temp64 = rate * (pdf + 1) - quad_parent_rate * mfi; - do_div(temp64, quad_parent_rate / 1000000); - mfn = (long)temp64; - - reg = mfi << 4 | pdf; - - *dp_op = reg; - *dp_mfd = mfd; - *dp_mfn = mfn; - - return 0; -} - -static int clk_pllv2_set_rate(struct clk_hw *hw, unsigned long rate, - unsigned long parent_rate) -{ - struct clk_pllv2 *pll = to_clk_pllv2(hw); - void __iomem *pllbase; - u32 dp_ctl, dp_op, dp_mfd, dp_mfn; - int ret; - - pllbase = pll->base; - - - ret = __clk_pllv2_set_rate(rate, parent_rate, &dp_op, &dp_mfd, &dp_mfn); - if (ret) - return ret; - - dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL); - /* use dpdck0_2 */ - __raw_writel(dp_ctl | 0x1000L, pllbase + MXC_PLL_DP_CTL); - - __raw_writel(dp_op, pllbase + MXC_PLL_DP_OP); - __raw_writel(dp_mfd, pllbase + MXC_PLL_DP_MFD); - __raw_writel(dp_mfn, pllbase + MXC_PLL_DP_MFN); - - return 0; -} - -static long clk_pllv2_round_rate(struct clk_hw *hw, unsigned long rate, - unsigned long *prate) -{ - u32 dp_op, dp_mfd, dp_mfn; - - __clk_pllv2_set_rate(rate, *prate, &dp_op, &dp_mfd, &dp_mfn); - return __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN, - dp_op, dp_mfd, dp_mfn); -} - -static int clk_pllv2_prepare(struct clk_hw *hw) -{ - struct clk_pllv2 *pll = to_clk_pllv2(hw); - u32 reg; - void __iomem *pllbase; - int i = 0; - - pllbase = pll->base; - reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) | MXC_PLL_DP_CTL_UPEN; - __raw_writel(reg, pllbase + MXC_PLL_DP_CTL); - - /* Wait for lock */ - do { - reg = __raw_readl(pllbase + MXC_PLL_DP_CTL); - if (reg & MXC_PLL_DP_CTL_LRF) - break; - - udelay(1); - } while (++i < MAX_DPLL_WAIT_TRIES); - - if (i == MAX_DPLL_WAIT_TRIES) { - pr_err("MX5: pll locking failed\n"); - return -EINVAL; - } - - return 0; -} - -static void clk_pllv2_unprepare(struct clk_hw *hw) -{ - struct clk_pllv2 *pll = to_clk_pllv2(hw); - u32 reg; - void __iomem *pllbase; - - pllbase = pll->base; - reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) & ~MXC_PLL_DP_CTL_UPEN; - __raw_writel(reg, pllbase + MXC_PLL_DP_CTL); -} - -static struct clk_ops clk_pllv2_ops = { - .prepare = clk_pllv2_prepare, - .unprepare = clk_pllv2_unprepare, - .recalc_rate = clk_pllv2_recalc_rate, - .round_rate = clk_pllv2_round_rate, - .set_rate = clk_pllv2_set_rate, -}; - -struct clk *imx_clk_pllv2(const char *name, const char *parent, - void __iomem *base) -{ - struct clk_pllv2 *pll; - struct clk *clk; - struct clk_init_data init; - - pll = kzalloc(sizeof(*pll), GFP_KERNEL); - if (!pll) - return ERR_PTR(-ENOMEM); - - pll->base = base; - - init.name = name; - init.ops = &clk_pllv2_ops; - init.flags = 0; - init.parent_names = &parent; - init.num_parents = 1; - - pll->hw.init = &init; - - clk = clk_register(NULL, &pll->hw); - if (IS_ERR(clk)) - kfree(pll); - - return clk; -} |