mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 13:14:27 +00:00
4abd8076c8
div_mask is different for GENERIC and USB pll, so set it according. Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> Reviewed-by: Lukasz Majewski <lukma@denx.de>
94 lines
2 KiB
C
94 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2019 DENX Software Engineering
|
|
* Lukasz Majewski, DENX Software Engineering, lukma@denx.de
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <malloc.h>
|
|
#include <clk-uclass.h>
|
|
#include <dm/device.h>
|
|
#include <dm/uclass.h>
|
|
#include <clk.h>
|
|
#include "clk.h"
|
|
|
|
#define UBOOT_DM_CLK_IMX_PLLV3_GENERIC "imx_clk_pllv3_generic"
|
|
#define UBOOT_DM_CLK_IMX_PLLV3_USB "imx_clk_pllv3_usb"
|
|
|
|
struct clk_pllv3 {
|
|
struct clk clk;
|
|
void __iomem *base;
|
|
u32 div_mask;
|
|
u32 div_shift;
|
|
};
|
|
|
|
#define to_clk_pllv3(_clk) container_of(_clk, struct clk_pllv3, clk)
|
|
|
|
static ulong clk_pllv3_generic_get_rate(struct clk *clk)
|
|
{
|
|
struct clk_pllv3 *pll = to_clk_pllv3(dev_get_clk_ptr(clk->dev));
|
|
unsigned long parent_rate = clk_get_parent_rate(clk);
|
|
|
|
u32 div = (readl(pll->base) >> pll->div_shift) & pll->div_mask;
|
|
|
|
return (div == 1) ? parent_rate * 22 : parent_rate * 20;
|
|
}
|
|
|
|
static const struct clk_ops clk_pllv3_generic_ops = {
|
|
.get_rate = clk_pllv3_generic_get_rate,
|
|
};
|
|
|
|
struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
|
|
const char *parent_name, void __iomem *base,
|
|
u32 div_mask)
|
|
{
|
|
struct clk_pllv3 *pll;
|
|
struct clk *clk;
|
|
char *drv_name;
|
|
int ret;
|
|
|
|
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
|
|
if (!pll)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
switch (type) {
|
|
case IMX_PLLV3_GENERIC:
|
|
drv_name = UBOOT_DM_CLK_IMX_PLLV3_GENERIC;
|
|
pll->div_shift = 0;
|
|
break;
|
|
case IMX_PLLV3_USB:
|
|
drv_name = UBOOT_DM_CLK_IMX_PLLV3_USB;
|
|
pll->div_shift = 1;
|
|
break;
|
|
default:
|
|
kfree(pll);
|
|
return ERR_PTR(-ENOTSUPP);
|
|
}
|
|
|
|
pll->base = base;
|
|
pll->div_mask = div_mask;
|
|
clk = &pll->clk;
|
|
|
|
ret = clk_register(clk, drv_name, name, parent_name);
|
|
if (ret) {
|
|
kfree(pll);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
return clk;
|
|
}
|
|
|
|
U_BOOT_DRIVER(clk_pllv3_generic) = {
|
|
.name = UBOOT_DM_CLK_IMX_PLLV3_GENERIC,
|
|
.id = UCLASS_CLK,
|
|
.ops = &clk_pllv3_generic_ops,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|
|
|
|
U_BOOT_DRIVER(clk_pllv3_usb) = {
|
|
.name = UBOOT_DM_CLK_IMX_PLLV3_USB,
|
|
.id = UCLASS_CLK,
|
|
.ops = &clk_pllv3_generic_ops,
|
|
.flags = DM_FLAG_PRE_RELOC,
|
|
};
|