summaryrefslogtreecommitdiff
path: root/arch/arm/mach-imx/clk-pfd.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-imx/clk-pfd.c')
-rw-r--r--arch/arm/mach-imx/clk-pfd.c158
1 files changed, 0 insertions, 158 deletions
diff --git a/arch/arm/mach-imx/clk-pfd.c b/arch/arm/mach-imx/clk-pfd.c
deleted file mode 100644
index 0b0f6f66e..000000000
--- a/arch/arm/mach-imx/clk-pfd.c
+++ /dev/null
@@ -1,158 +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/io.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include "clk.h"
-
-/**
- * struct clk_pfd - IMX PFD clock
- * @clk_hw: clock source
- * @reg: PFD register address
- * @idx: the index of PFD encoded in the register
- *
- * PFD clock found on i.MX6 series. Each register for PFD has 4 clk_pfd
- * data encoded, and member idx is used to specify the one. And each
- * register has SET, CLR and TOG registers at offset 0x4 0x8 and 0xc.
- */
-struct clk_pfd {
- struct clk_hw hw;
- void __iomem *reg;
- u8 idx;
-};
-
-#define to_clk_pfd(_hw) container_of(_hw, struct clk_pfd, hw)
-
-#define SET 0x4
-#define CLR 0x8
-#define OTG 0xc
-
-static int clk_pfd_enable(struct clk_hw *hw)
-{
- struct clk_pfd *pfd = to_clk_pfd(hw);
-
- writel_relaxed(1 << ((pfd->idx + 1) * 8 - 1), pfd->reg + CLR);
-
- return 0;
-}
-
-static void clk_pfd_disable(struct clk_hw *hw)
-{
- struct clk_pfd *pfd = to_clk_pfd(hw);
-
- writel_relaxed(1 << ((pfd->idx + 1) * 8 - 1), pfd->reg + SET);
-}
-
-static unsigned long clk_pfd_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
-{
- struct clk_pfd *pfd = to_clk_pfd(hw);
- u64 tmp = parent_rate;
- u8 frac = (readl_relaxed(pfd->reg) >> (pfd->idx * 8)) & 0x3f;
-
- tmp *= 18;
- do_div(tmp, frac);
-
- return tmp;
-}
-
-static long clk_pfd_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
-{
- u64 tmp = *prate;
- u8 frac;
-
- tmp = tmp * 18 + rate / 2;
- do_div(tmp, rate);
- frac = tmp;
- if (frac < 12)
- frac = 12;
- else if (frac > 35)
- frac = 35;
- tmp = *prate;
- tmp *= 18;
- do_div(tmp, frac);
-
- return tmp;
-}
-
-static int clk_pfd_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
-{
- struct clk_pfd *pfd = to_clk_pfd(hw);
- u64 tmp = parent_rate;
- u8 frac;
-
- tmp = tmp * 18 + rate / 2;
- do_div(tmp, rate);
- frac = tmp;
- if (frac < 12)
- frac = 12;
- else if (frac > 35)
- frac = 35;
-
- writel_relaxed(0x3f << (pfd->idx * 8), pfd->reg + CLR);
- writel_relaxed(frac << (pfd->idx * 8), pfd->reg + SET);
-
- return 0;
-}
-
-static int clk_pfd_is_enabled(struct clk_hw *hw)
-{
- struct clk_pfd *pfd = to_clk_pfd(hw);
-
- if (readl_relaxed(pfd->reg) & (1 << ((pfd->idx + 1) * 8 - 1)))
- return 0;
-
- return 1;
-}
-
-static const struct clk_ops clk_pfd_ops = {
- .enable = clk_pfd_enable,
- .disable = clk_pfd_disable,
- .recalc_rate = clk_pfd_recalc_rate,
- .round_rate = clk_pfd_round_rate,
- .set_rate = clk_pfd_set_rate,
- .is_enabled = clk_pfd_is_enabled,
-};
-
-struct clk *imx_clk_pfd(const char *name, const char *parent_name,
- void __iomem *reg, u8 idx)
-{
- struct clk_pfd *pfd;
- struct clk *clk;
- struct clk_init_data init;
-
- pfd = kzalloc(sizeof(*pfd), GFP_KERNEL);
- if (!pfd)
- return ERR_PTR(-ENOMEM);
-
- pfd->reg = reg;
- pfd->idx = idx;
-
- init.name = name;
- init.ops = &clk_pfd_ops;
- init.flags = 0;
- init.parent_names = &parent_name;
- init.num_parents = 1;
-
- pfd->hw.init = &init;
-
- clk = clk_register(NULL, &pfd->hw);
- if (IS_ERR(clk))
- kfree(pfd);
-
- return clk;
-}