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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arm/mach-imx/clk-pllv1.c
parentf93b97fd65072de626c074dbe099a1fff05ce060 (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-pllv1.c')
-rw-r--r--kernel/arch/arm/mach-imx/clk-pllv1.c126
1 files changed, 0 insertions, 126 deletions
diff --git a/kernel/arch/arm/mach-imx/clk-pllv1.c b/kernel/arch/arm/mach-imx/clk-pllv1.c
deleted file mode 100644
index d21d14ca4..000000000
--- a/kernel/arch/arm/mach-imx/clk-pllv1.c
+++ /dev/null
@@ -1,126 +0,0 @@
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/err.h>
-
-#include "clk.h"
-#include "common.h"
-#include "hardware.h"
-
-/**
- * pll v1
- *
- * @clk_hw clock source
- * @parent the parent clock name
- * @base base address of pll registers
- *
- * PLL clock version 1, found on i.MX1/21/25/27/31/35
- */
-
-#define MFN_BITS (10)
-#define MFN_SIGN (BIT(MFN_BITS - 1))
-#define MFN_MASK (MFN_SIGN - 1)
-
-struct clk_pllv1 {
- struct clk_hw hw;
- void __iomem *base;
-};
-
-#define to_clk_pllv1(clk) (container_of(clk, struct clk_pllv1, clk))
-
-static inline bool mfn_is_negative(unsigned int mfn)
-{
- return !cpu_is_mx1() && !cpu_is_mx21() && (mfn & MFN_SIGN);
-}
-
-static unsigned long clk_pllv1_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct clk_pllv1 *pll = to_clk_pllv1(hw);
- long long ll;
- int mfn_abs;
- unsigned int mfi, mfn, mfd, pd;
- u32 reg;
- unsigned long rate;
-
- reg = readl(pll->base);
-
- /*
- * Get the resulting clock rate from a PLL register value and the input
- * frequency. PLLs with this register layout can be found on i.MX1,
- * i.MX21, i.MX27 and i,MX31
- *
- * mfi + mfn / (mfd + 1)
- * f = 2 * f_ref * --------------------
- * pd + 1
- */
-
- mfi = (reg >> 10) & 0xf;
- mfn = reg & 0x3ff;
- mfd = (reg >> 16) & 0x3ff;
- pd = (reg >> 26) & 0xf;
-
- mfi = mfi <= 5 ? 5 : mfi;
-
- mfn_abs = mfn;
-
- /*
- * On all i.MXs except i.MX1 and i.MX21 mfn is a 10bit
- * 2's complements number.
- * On i.MX27 the bit 9 is the sign bit.
- */
- if (mfn_is_negative(mfn)) {
- if (cpu_is_mx27())
- mfn_abs = mfn & MFN_MASK;
- else
- mfn_abs = BIT(MFN_BITS) - mfn;
- }
-
- rate = parent_rate * 2;
- rate /= pd + 1;
-
- ll = (unsigned long long)rate * mfn_abs;
-
- do_div(ll, mfd + 1);
-
- if (mfn_is_negative(mfn))
- ll = -ll;
-
- ll = (rate * mfi) + ll;
-
- return ll;
-}
-
-static struct clk_ops clk_pllv1_ops = {
- .recalc_rate = clk_pllv1_recalc_rate,
-};
-
-struct clk *imx_clk_pllv1(const char *name, const char *parent,
- void __iomem *base)
-{
- struct clk_pllv1 *pll;
- struct clk *clk;
- struct clk_init_data init;
-
- pll = kmalloc(sizeof(*pll), GFP_KERNEL);
- if (!pll)
- return ERR_PTR(-ENOMEM);
-
- pll->base = base;
-
- init.name = name;
- init.ops = &clk_pllv1_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;
-}