diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/arm/mach-imx/clk-pfd.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-pfd.c')
-rw-r--r-- | kernel/arch/arm/mach-imx/clk-pfd.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/kernel/arch/arm/mach-imx/clk-pfd.c b/kernel/arch/arm/mach-imx/clk-pfd.c deleted file mode 100644 index 0b0f6f66e..000000000 --- a/kernel/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; -} |