mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 08:57:58 +00:00
019ef9a3f3
This pll code is primarily based on the code from the kendryte standalone sdk in lib/drivers/sysctl.c. k210_pll_calc_config is roughly analogous to the algorithm used to set the pll frequency, but it has been completely rewritten to be fixed-point based. Signed-off-by: Sean Anderson <seanga2@gmail.com> CC: Lukasz Majewski <lukma@denx.de>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright (C) 2019-20 Sean Anderson <seanga2@gmail.com>
|
|
*/
|
|
#ifndef K210_PLL_H
|
|
#define K210_PLL_H
|
|
|
|
#include <clk.h>
|
|
#include <test/export.h>
|
|
|
|
#define K210_PLL_CLKR GENMASK(3, 0)
|
|
#define K210_PLL_CLKF GENMASK(9, 4)
|
|
#define K210_PLL_CLKOD GENMASK(13, 10) /* Output Divider */
|
|
#define K210_PLL_BWADJ GENMASK(19, 14) /* BandWidth Adjust */
|
|
#define K210_PLL_RESET BIT(20)
|
|
#define K210_PLL_PWRD BIT(21) /* PoWeReD */
|
|
#define K210_PLL_INTFB BIT(22) /* Internal FeedBack */
|
|
#define K210_PLL_BYPASS BIT(23)
|
|
#define K210_PLL_TEST BIT(24)
|
|
#define K210_PLL_EN BIT(25)
|
|
#define K210_PLL_TEST_EN BIT(26)
|
|
|
|
#define K210_PLL_LOCK 0
|
|
#define K210_PLL_CLEAR_SLIP 2
|
|
#define K210_PLL_TEST_OUT 3
|
|
|
|
struct k210_pll {
|
|
struct clk clk;
|
|
void __iomem *reg; /* Base PLL register */
|
|
void __iomem *lock; /* Common PLL lock register */
|
|
u8 shift; /* Offset of bits in lock register */
|
|
u8 width; /* Width of lock bits to test against */
|
|
};
|
|
|
|
#define to_k210_pll(_clk) container_of(_clk, struct k210_pll, clk)
|
|
|
|
struct k210_pll_config {
|
|
u8 r;
|
|
u8 f;
|
|
u8 od;
|
|
};
|
|
|
|
#ifdef CONFIG_UNIT_TEST
|
|
TEST_STATIC int k210_pll_calc_config(u32 rate, u32 rate_in,
|
|
struct k210_pll_config *best);
|
|
#define nop()
|
|
#endif
|
|
|
|
extern const struct clk_ops k210_pll_ops;
|
|
|
|
struct clk *k210_register_pll_struct(const char *name, const char *parent_name,
|
|
struct k210_pll *pll);
|
|
struct clk *k210_register_pll(const char *name, const char *parent_name,
|
|
void __iomem *reg, void __iomem *lock, u8 shift,
|
|
u8 width);
|
|
|
|
#endif /* K210_PLL_H */
|