mirror of
https://github.com/torvalds/linux.git
synced 2024-12-13 06:32:50 +00:00
2af9e6db14
The pllv1 is found on i.MX1, i.M25, i.MX27, i.MX31 and i.MX35. Currently only reading the rate is supported. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
#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 <mach/common.h>
|
|
#include <mach/hardware.h>
|
|
#include <mach/clock.h>
|
|
#include "clk.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
|
|
*/
|
|
struct clk_pllv1 {
|
|
struct clk_hw hw;
|
|
void __iomem *base;
|
|
};
|
|
|
|
#define to_clk_pllv1(clk) (container_of(clk, struct clk_pllv1, clk))
|
|
|
|
static unsigned long clk_pllv1_recalc_rate(struct clk_hw *hw,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_pllv1 *pll = to_clk_pllv1(hw);
|
|
|
|
return mxc_decode_pll(readl(pll->base), parent_rate);
|
|
}
|
|
|
|
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;
|
|
}
|