redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity
alistair23-linux/drivers/clk/nxp/clk-lpc32xx.c
Thomas Gleixner fcaf20360a treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 159 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 161 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.383790741@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

1588 lines
44 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2015 Vladimir Zapolskiy <vz@mleia.com>
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/regmap.h>
#include <dt-bindings/clock/lpc32xx-clock.h>
#undef pr_fmt
#define pr_fmt(fmt) "%s: " fmt, __func__
/* Common bitfield definitions for x397 PLL (lock), USB PLL and HCLK PLL */
#define PLL_CTRL_ENABLE BIT(16)
#define PLL_CTRL_BYPASS BIT(15)
#define PLL_CTRL_DIRECT BIT(14)
#define PLL_CTRL_FEEDBACK BIT(13)
#define PLL_CTRL_POSTDIV (BIT(12)|BIT(11))
#define PLL_CTRL_PREDIV (BIT(10)|BIT(9))
#define PLL_CTRL_FEEDDIV (0xFF << 1)
#define PLL_CTRL_LOCK BIT(0)
/* Clock registers on System Control Block */
#define LPC32XX_CLKPWR_DEBUG_CTRL 0x00
#define LPC32XX_CLKPWR_USB_DIV 0x1C
#define LPC32XX_CLKPWR_HCLKDIV_CTRL 0x40
#define LPC32XX_CLKPWR_PWR_CTRL 0x44
#define LPC32XX_CLKPWR_PLL397_CTRL 0x48
#define LPC32XX_CLKPWR_OSC_CTRL 0x4C
#define LPC32XX_CLKPWR_SYSCLK_CTRL 0x50
#define LPC32XX_CLKPWR_LCDCLK_CTRL 0x54
#define LPC32XX_CLKPWR_HCLKPLL_CTRL 0x58
#define LPC32XX_CLKPWR_ADCCLK_CTRL1 0x60
#define LPC32XX_CLKPWR_USB_CTRL 0x64
#define LPC32XX_CLKPWR_SSP_CTRL 0x78
#define LPC32XX_CLKPWR_I2S_CTRL 0x7C
#define LPC32XX_CLKPWR_MS_CTRL 0x80
#define LPC32XX_CLKPWR_MACCLK_CTRL 0x90
#define LPC32XX_CLKPWR_TEST_CLK_CTRL 0xA4
#define LPC32XX_CLKPWR_I2CCLK_CTRL 0xAC
#define LPC32XX_CLKPWR_KEYCLK_CTRL 0xB0
#define LPC32XX_CLKPWR_ADCCLK_CTRL 0xB4
#define LPC32XX_CLKPWR_PWMCLK_CTRL 0xB8
#define LPC32XX_CLKPWR_TIMCLK_CTRL 0xBC
#define LPC32XX_CLKPWR_TIMCLK_CTRL1 0xC0
#define LPC32XX_CLKPWR_SPI_CTRL 0xC4
#define LPC32XX_CLKPWR_FLASHCLK_CTRL 0xC8
#define LPC32XX_CLKPWR_UART3_CLK_CTRL 0xD0
#define LPC32XX_CLKPWR_UART4_CLK_CTRL 0xD4
#define LPC32XX_CLKPWR_UART5_CLK_CTRL 0xD8
#define LPC32XX_CLKPWR_UART6_CLK_CTRL 0xDC
#define LPC32XX_CLKPWR_IRDA_CLK_CTRL 0xE0
#define LPC32XX_CLKPWR_UART_CLK_CTRL 0xE4
#define LPC32XX_CLKPWR_DMA_CLK_CTRL 0xE8
/* Clock registers on USB controller */
#define LPC32XX_USB_CLK_CTRL 0xF4
#define LPC32XX_USB_CLK_STS 0xF8
static struct regmap_config lpc32xx_scb_regmap_config = {
.name = "scb",
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.val_format_endian = REGMAP_ENDIAN_LITTLE,
.max_register = 0x114,
.fast_io = true,
};
static struct regmap *clk_regmap;
static void __iomem *usb_clk_vbase;
enum {
LPC32XX_USB_CLK_OTG = LPC32XX_USB_CLK_HOST + 1,
LPC32XX_USB_CLK_AHB,
LPC32XX_USB_CLK_MAX = LPC32XX_USB_CLK_AHB + 1,
};
enum {
/* Start from the last defined clock in dt bindings */
LPC32XX_CLK_ADC_DIV = LPC32XX_CLK_PERIPH + 1,
LPC32XX_CLK_ADC_RTC,
LPC32XX_CLK_TEST1,
LPC32XX_CLK_TEST2,
/* System clocks, PLL 397x and HCLK PLL clocks */
LPC32XX_CLK_OSC,
LPC32XX_CLK_SYS,
LPC32XX_CLK_PLL397X,
LPC32XX_CLK_HCLK_DIV_PERIPH,
LPC32XX_CLK_HCLK_DIV,
LPC32XX_CLK_HCLK,
LPC32XX_CLK_ARM,
LPC32XX_CLK_ARM_VFP,
/* USB clocks */
LPC32XX_CLK_USB_PLL,
LPC32XX_CLK_USB_DIV,
LPC32XX_CLK_USB,
/* Only one control PWR_CTRL[10] for both muxes */
LPC32XX_CLK_PERIPH_HCLK_MUX,
LPC32XX_CLK_PERIPH_ARM_MUX,
/* Only one control PWR_CTRL[2] for all three muxes */
LPC32XX_CLK_SYSCLK_PERIPH_MUX,
LPC32XX_CLK_SYSCLK_HCLK_MUX,
LPC32XX_CLK_SYSCLK_ARM_MUX,
/* Two clock sources external to the driver */
LPC32XX_CLK_XTAL_32K,
LPC32XX_CLK_XTAL,
/* Renumbered USB clocks, may have a parent from SCB table */
LPC32XX_CLK_USB_OFFSET,
LPC32XX_CLK_USB_I2C = LPC32XX_USB_CLK_I2C + LPC32XX_CLK_USB_OFFSET,
LPC32XX_CLK_USB_DEV = LPC32XX_USB_CLK_DEVICE + LPC32XX_CLK_USB_OFFSET,
LPC32XX_CLK_USB_HOST = LPC32XX_USB_CLK_HOST + LPC32XX_CLK_USB_OFFSET,
LPC32XX_CLK_USB_OTG = LPC32XX_USB_CLK_OTG + LPC32XX_CLK_USB_OFFSET,
LPC32XX_CLK_USB_AHB = LPC32XX_USB_CLK_AHB + LPC32XX_CLK_USB_OFFSET,
/* Stub for composite clocks */
LPC32XX_CLK__NULL,
/* Subclocks of composite clocks, clocks above are for CCF */
LPC32XX_CLK_PWM1_MUX,
LPC32XX_CLK_PWM1_DIV,
LPC32XX_CLK_PWM1_GATE,
LPC32XX_CLK_PWM2_MUX,
LPC32XX_CLK_PWM2_DIV,
LPC32XX_CLK_PWM2_GATE,
LPC32XX_CLK_UART3_MUX,
LPC32XX_CLK_UART3_DIV,
LPC32XX_CLK_UART3_GATE,
LPC32XX_CLK_UART4_MUX,
LPC32XX_CLK_UART4_DIV,
LPC32XX_CLK_UART4_GATE,
LPC32XX_CLK_UART5_MUX,
LPC32XX_CLK_UART5_DIV,
LPC32XX_CLK_UART5_GATE,
LPC32XX_CLK_UART6_MUX,
LPC32XX_CLK_UART6_DIV,
LPC32XX_CLK_UART6_GATE,
LPC32XX_CLK_TEST1_MUX,
LPC32XX_CLK_TEST1_GATE,
LPC32XX_CLK_TEST2_MUX,
LPC32XX_CLK_TEST2_GATE,
LPC32XX_CLK_USB_DIV_DIV,
LPC32XX_CLK_USB_DIV_GATE,
LPC32XX_CLK_SD_DIV,
LPC32XX_CLK_SD_GATE,
LPC32XX_CLK_LCD_DIV,
LPC32XX_CLK_LCD_GATE,
LPC32XX_CLK_HW_MAX,
LPC32XX_CLK_MAX = LPC32XX_CLK_SYSCLK_ARM_MUX + 1,
LPC32XX_CLK_CCF_MAX = LPC32XX_CLK_USB_AHB + 1,
};
static struct clk *clk[LPC32XX_CLK_MAX];
static struct clk_onecell_data clk_data = {
.clks = clk,
.clk_num = LPC32XX_CLK_MAX,
};
static struct clk *usb_clk[LPC32XX_USB_CLK_MAX];
static struct clk_onecell_data usb_clk_data = {
.clks = usb_clk,
.clk_num = LPC32XX_USB_CLK_MAX,
};
#define LPC32XX_CLK_PARENTS_MAX 5
struct clk_proto_t {
const char *name;
const u8 parents[LPC32XX_CLK_PARENTS_MAX];
u8 num_parents;
unsigned long flags;
};
#define CLK_PREFIX(LITERAL) LPC32XX_CLK_ ## LITERAL
#define NUMARGS(...) (sizeof((int[]){__VA_ARGS__})/sizeof(int))
#define LPC32XX_CLK_DEFINE(_idx, _name, _flags, ...) \
[CLK_PREFIX(_idx)] = { \
.name = _name, \
.flags = _flags, \
.parents = { __VA_ARGS__ }, \
.num_parents = NUMARGS(__VA_ARGS__), \
}
static const struct clk_proto_t clk_proto[LPC32XX_CLK_CCF_MAX] __initconst = {
LPC32XX_CLK_DEFINE(XTAL, "xtal", 0x0),
LPC32XX_CLK_DEFINE(XTAL_32K, "xtal_32k", 0x0),
LPC32XX_CLK_DEFINE(RTC, "rtc", 0x0, LPC32XX_CLK_XTAL_32K),
LPC32XX_CLK_DEFINE(OSC, "osc", CLK_IGNORE_UNUSED, LPC32XX_CLK_XTAL),
LPC32XX_CLK_DEFINE(SYS, "sys", CLK_IGNORE_UNUSED,
LPC32XX_CLK_OSC, LPC32XX_CLK_PLL397X),
LPC32XX_CLK_DEFINE(PLL397X, "pll_397x", CLK_IGNORE_UNUSED,
LPC32XX_CLK_RTC),
LPC32XX_CLK_DEFINE(HCLK_PLL, "hclk_pll", CLK_IGNORE_UNUSED,
LPC32XX_CLK_SYS),
LPC32XX_CLK_DEFINE(HCLK_DIV_PERIPH, "hclk_div_periph",
CLK_IGNORE_UNUSED, LPC32XX_CLK_HCLK_PLL),
LPC32XX_CLK_DEFINE(HCLK_DIV, "hclk_div", CLK_IGNORE_UNUSED,
LPC32XX_CLK_HCLK_PLL),
LPC32XX_CLK_DEFINE(HCLK, "hclk", CLK_IGNORE_UNUSED,
LPC32XX_CLK_PERIPH_HCLK_MUX),
LPC32XX_CLK_DEFINE(PERIPH, "pclk", CLK_IGNORE_UNUSED,
LPC32XX_CLK_SYSCLK_PERIPH_MUX),
LPC32XX_CLK_DEFINE(ARM, "arm", CLK_IGNORE_UNUSED,
LPC32XX_CLK_PERIPH_ARM_MUX),
LPC32XX_CLK_DEFINE(PERIPH_HCLK_MUX, "periph_hclk_mux",
CLK_IGNORE_UNUSED,
LPC32XX_CLK_SYSCLK_HCLK_MUX, LPC32XX_CLK_SYSCLK_PERIPH_MUX),
LPC32XX_CLK_DEFINE(PERIPH_ARM_MUX, "periph_arm_mux", CLK_IGNORE_UNUSED,
LPC32XX_CLK_SYSCLK_ARM_MUX, LPC32XX_CLK_SYSCLK_PERIPH_MUX),
LPC32XX_CLK_DEFINE(SYSCLK_PERIPH_MUX, "sysclk_periph_mux",
CLK_IGNORE_UNUSED,
LPC32XX_CLK_SYS, LPC32XX_CLK_HCLK_DIV_PERIPH),
LPC32XX_CLK_DEFINE(SYSCLK_HCLK_MUX, "sysclk_hclk_mux",
CLK_IGNORE_UNUSED,
LPC32XX_CLK_SYS, LPC32XX_CLK_HCLK_DIV),
LPC32XX_CLK_DEFINE(SYSCLK_ARM_MUX, "sysclk_arm_mux", CLK_IGNORE_UNUSED,
LPC32XX_CLK_SYS, LPC32XX_CLK_HCLK_PLL),
LPC32XX_CLK_DEFINE(ARM_VFP, "vfp9", CLK_IGNORE_UNUSED,
LPC32XX_CLK_ARM),
LPC32XX_CLK_DEFINE(USB_PLL, "usb_pll",
CLK_SET_RATE_GATE | CLK_SET_RATE_PARENT, LPC32XX_CLK_USB_DIV),
LPC32XX_CLK_DEFINE(USB_DIV, "usb_div", 0x0, LPC32XX_CLK_OSC),
LPC32XX_CLK_DEFINE(USB, "usb", 0x0, LPC32XX_CLK_USB_PLL),
LPC32XX_CLK_DEFINE(DMA, "dma", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(MLC, "mlc", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(SLC, "slc", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(LCD, "lcd", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(MAC, "mac", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(SD, "sd", 0x0, LPC32XX_CLK_ARM),
LPC32XX_CLK_DEFINE(DDRAM, "ddram", CLK_GET_RATE_NOCACHE,
LPC32XX_CLK_SYSCLK_ARM_MUX),
LPC32XX_CLK_DEFINE(SSP0, "ssp0", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(SSP1, "ssp1", 0x0, LPC32XX_CLK_HCLK),
/*
* CLK_GET_RATE_NOCACHE is needed, if UART clock is disabled, its
* divider register does not contain information about selected rate.
*/
LPC32XX_CLK_DEFINE(UART3, "uart3", CLK_GET_RATE_NOCACHE,
LPC32XX_CLK_PERIPH, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(UART4, "uart4", CLK_GET_RATE_NOCACHE,
LPC32XX_CLK_PERIPH, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(UART5, "uart5", CLK_GET_RATE_NOCACHE,
LPC32XX_CLK_PERIPH, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(UART6, "uart6", CLK_GET_RATE_NOCACHE,
LPC32XX_CLK_PERIPH, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(IRDA, "irda", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(I2C1, "i2c1", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(I2C2, "i2c2", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(TIMER0, "timer0", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(TIMER1, "timer1", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(TIMER2, "timer2", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(TIMER3, "timer3", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(TIMER4, "timer4", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(TIMER5, "timer5", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(WDOG, "watchdog", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(I2S0, "i2s0", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(I2S1, "i2s1", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(SPI1, "spi1", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(SPI2, "spi2", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(MCPWM, "mcpwm", 0x0, LPC32XX_CLK_HCLK),
LPC32XX_CLK_DEFINE(HSTIMER, "hstimer", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(KEY, "key", 0x0, LPC32XX_CLK_RTC),
LPC32XX_CLK_DEFINE(PWM1, "pwm1", 0x0,
LPC32XX_CLK_RTC, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(PWM2, "pwm2", 0x0,
LPC32XX_CLK_RTC, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(ADC, "adc", 0x0,
LPC32XX_CLK_ADC_RTC, LPC32XX_CLK_ADC_DIV),
LPC32XX_CLK_DEFINE(ADC_DIV, "adc_div", 0x0, LPC32XX_CLK_PERIPH),
LPC32XX_CLK_DEFINE(ADC_RTC, "adc_rtc", 0x0, LPC32XX_CLK_RTC),
LPC32XX_CLK_DEFINE(TEST1, "test1", 0x0,
LPC32XX_CLK_PERIPH, LPC32XX_CLK_RTC, LPC32XX_CLK_OSC),
LPC32XX_CLK_DEFINE(TEST2, "test2", 0x0,
LPC32XX_CLK_HCLK, LPC32XX_CLK_PERIPH, LPC32XX_CLK_USB,
LPC32XX_CLK_OSC, LPC32XX_CLK_PLL397X),
/* USB controller clocks */
LPC32XX_CLK_DEFINE(USB_AHB, "usb_ahb", 0x0, LPC32XX_CLK_USB),
LPC32XX_CLK_DEFINE(USB_OTG, "usb_otg", 0x0, LPC32XX_CLK_USB_AHB),
LPC32XX_CLK_DEFINE(USB_I2C, "usb_i2c", 0x0, LPC32XX_CLK_USB_AHB),
LPC32XX_CLK_DEFINE(USB_DEV, "usb_dev", 0x0, LPC32XX_CLK_USB_OTG),
LPC32XX_CLK_DEFINE(USB_HOST, "usb_host", 0x0, LPC32XX_CLK_USB_OTG),
};
struct lpc32xx_clk {
struct clk_hw hw;
u32 reg;
u32 enable;
u32 enable_mask;
u32 disable;
u32 disable_mask;
u32 busy;
u32 busy_mask;
};
enum clk_pll_mode {
PLL_UNKNOWN,
PLL_DIRECT,
PLL_BYPASS,
PLL_DIRECT_BYPASS,
PLL_INTEGER,
PLL_NON_INTEGER,
};
struct lpc32xx_pll_clk {
struct clk_hw hw;
u32 reg;
u32 enable;
unsigned long m_div;
unsigned long n_div;
unsigned long p_div;
enum clk_pll_mode mode;
};
struct lpc32xx_usb_clk {
struct clk_hw hw;
u32 ctrl_enable;
u32 ctrl_disable;
u32 ctrl_mask;
u32 enable;
u32 busy;
};
struct lpc32xx_clk_mux {
struct clk_hw hw;
u32 reg;
u32 mask;
u8 shift;
u32 *table;
u8 flags;
};
struct lpc32xx_clk_div {
struct clk_hw hw;
u32 reg;
u8 shift;
u8 width;
const struct clk_div_table *table;
u8 flags;
};
struct lpc32xx_clk_gate {
struct clk_hw hw;
u32 reg;
u8 bit_idx;
u8 flags;
};
#define to_lpc32xx_clk(_hw) container_of(_hw, struct lpc32xx_clk, hw)
#define to_lpc32xx_pll_clk(_hw) container_of(_hw, struct lpc32xx_pll_clk, hw)
#define to_lpc32xx_usb_clk(_hw) container_of(_hw, struct lpc32xx_usb_clk, hw)
#define to_lpc32xx_mux(_hw) container_of(_hw, struct lpc32xx_clk_mux, hw)
#define to_lpc32xx_div(_hw) container_of(_hw, struct lpc32xx_clk_div, hw)
#define to_lpc32xx_gate(_hw) container_of(_hw, struct lpc32xx_clk_gate, hw)
static inline bool pll_is_valid(u64 val0, u64 val1, u64 min, u64 max)
{
return (val0 >= (val1 * min) && val0 <= (val1 * max));
}
static inline u32 lpc32xx_usb_clk_read(struct lpc32xx_usb_clk *clk)
{
return readl(usb_clk_vbase + LPC32XX_USB_CLK_STS);
}
static inline void lpc32xx_usb_clk_write(struct lpc32xx_usb_clk *clk, u32 val)
{
writel(val, usb_clk_vbase + LPC32XX_USB_CLK_CTRL);
}
static int clk_mask_enable(struct clk_hw *hw)
{
struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
u32 val;
regmap_read(clk_regmap, clk->reg, &val);
if (clk->busy_mask && (val & clk->busy_mask) == clk->busy)
return -EBUSY;
return regmap_update_bits(clk_regmap, clk->reg,
clk->enable_mask, clk->enable);
}
static void clk_mask_disable(struct clk_hw *hw)
{
struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
regmap_update_bits(clk_regmap, clk->reg,
clk->disable_mask, clk->disable);
}
static int clk_mask_is_enabled(struct clk_hw *hw)
{
struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
u32 val;
regmap_read(clk_regmap, clk->reg, &val);
return ((val & clk->enable_mask) == clk->enable);
}
static const struct clk_ops clk_mask_ops = {
.enable = clk_mask_enable,
.disable = clk_mask_disable,
.is_enabled = clk_mask_is_enabled,
};
static int clk_pll_enable(struct clk_hw *hw)
{
struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
u32 val, count;
regmap_update_bits(clk_regmap, clk->reg, clk->enable, clk->enable);
for (count = 0; count < 1000; count++) {
regmap_read(clk_regmap, clk->reg, &val);
if (val & PLL_CTRL_LOCK)
break;
}
if (val & PLL_CTRL_LOCK)
return 0;
return -ETIMEDOUT;
}
static void clk_pll_disable(struct clk_hw *hw)
{
struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
regmap_update_bits(clk_regmap, clk->reg, clk->enable, 0x0);
}
static int clk_pll_is_enabled(struct clk_hw *hw)
{
struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
u32 val;
regmap_read(clk_regmap, clk->reg, &val);
val &= clk->enable | PLL_CTRL_LOCK;
if (val == (clk->enable | PLL_CTRL_LOCK))
return 1;
return 0;
}
static unsigned long clk_pll_397x_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
return parent_rate * 397;
}
static unsigned long clk_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
bool is_direct, is_bypass, is_feedback;
unsigned long rate, cco_rate, ref_rate;
u32 val;
regmap_read(clk_regmap, clk->reg, &val);
is_direct = val & PLL_CTRL_DIRECT;
is_bypass = val & PLL_CTRL_BYPASS;
is_feedback = val & PLL_CTRL_FEEDBACK;
clk->m_div = ((val & PLL_CTRL_FEEDDIV) >> 1) + 1;
clk->n_div = ((val & PLL_CTRL_PREDIV) >> 9) + 1;
clk->p_div = ((val & PLL_CTRL_POSTDIV) >> 11) + 1;
if (is_direct && is_bypass) {
clk->p_div = 0;
clk->mode = PLL_DIRECT_BYPASS;
return parent_rate;
}
if (is_bypass) {
clk->mode = PLL_BYPASS;
return parent_rate / (1 << clk->p_div);
}
if (is_direct) {
clk->p_div = 0;
clk->mode = PLL_DIRECT;
}
ref_rate = parent_rate / clk->n_div;
rate = cco_rate = ref_rate * clk->m_div;
if (!is_direct) {
if (is_feedback) {
cco_rate *= (1 << clk->p_div);
clk->mode = PLL_INTEGER;
} else {
rate /= (1 << clk->p_div);
clk->mode = PLL_NON_INTEGER;
}
}
pr_debug("%s: %lu: 0x%x: %d/%d/%d, %lu/%lu/%d => %lu\n",
clk_hw_get_name(hw),
parent_rate, val, is_direct, is_bypass, is_feedback,
clk->n_div, clk->m_div, (1 << clk->p_div), rate);
if (clk_pll_is_enabled(hw) &&
!(pll_is_valid(parent_rate, 1, 1000000, 20000000)
&& pll_is_valid(cco_rate, 1, 156000000, 320000000)
&& pll_is_valid(ref_rate, 1, 1000000, 27000000)))
pr_err("%s: PLL clocks are not in valid ranges: %lu/%lu/%lu\n",
clk_hw_get_name(hw),
parent_rate, cco_rate, ref_rate);
return rate;
}
static int clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
u32 val;
unsigned long new_rate;
/* Validate PLL clock parameters computed on round rate stage */
switch (clk->mode) {
case PLL_DIRECT:
val = PLL_CTRL_DIRECT;
val |= (clk->m_div - 1) << 1;
val |= (clk->n_div - 1) << 9;
new_rate = (parent_rate * clk->m_div) / clk->n_div;
break;
case PLL_BYPASS:
val = PLL_CTRL_BYPASS;
val |= (clk->p_div - 1) << 11;
new_rate = parent_rate / (1 << (clk->p_div));
break;
case PLL_DIRECT_BYPASS:
val = PLL_CTRL_DIRECT | PLL_CTRL_BYPASS;
new_rate = parent_rate;
break;
case PLL_INTEGER:
val = PLL_CTRL_FEEDBACK;
val |= (clk->m_div - 1) << 1;
val |= (clk->n_div - 1) << 9;
val |= (clk->p_div - 1) << 11;
new_rate = (parent_rate * clk->m_div) / clk->n_div;
break;
case PLL_NON_INTEGER:
val = 0x0;
val |= (clk->m_div - 1) << 1;
val |= (clk->n_div - 1) << 9;
val |= (clk->p_div - 1) << 11;
new_rate = (parent_rate * clk->m_div) /
(clk->n_div * (1 << clk->p_div));
break;
default:
return -EINVAL;
}
/* Sanity check that round rate is equal to the requested one */
if (new_rate != rate)
return -EINVAL;
return regmap_update_bits(clk_regmap, clk->reg, 0x1FFFF, val);
}
static long clk_hclk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
u64 m_i, o = rate, i = *parent_rate, d = (u64)rate << 6;
u64 m = 0, n = 0, p = 0;
int p_i, n_i;
pr_debug("%s: %lu/%lu\n", clk_hw_get_name(hw), *parent_rate, rate);
if (rate > 266500000)
return -EINVAL;
/* Have to check all 20 possibilities to find the minimal M */
for (p_i = 4; p_i >= 0; p_i--) {
for (n_i = 4; n_i > 0; n_i--) {
m_i = div64_u64(o * n_i * (1 << p_i), i);
/* Check for valid PLL parameter constraints */
if (!(m_i && m_i <= 256
&& pll_is_valid(i, n_i, 1000000, 27000000)
&& pll_is_valid(i * m_i * (1 << p_i), n_i,
156000000, 320000000)))
continue;
/* Store some intermediate valid parameters */
if (o * n_i * (1 << p_i) - i * m_i <= d) {
m = m_i;
n = n_i;
p = p_i;
d = o * n_i * (1 << p_i) - i * m_i;
}
}
}
if (d == (u64)rate << 6) {
pr_err("%s: %lu: no valid PLL parameters are found\n",
clk_hw_get_name(hw), rate);
return -EINVAL;
}
clk->m_div = m;
clk->n_div = n;
clk->p_div = p;
/* Set only direct or non-integer mode of PLL */
if (!p)
clk->mode = PLL_DIRECT;
else
clk->mode = PLL_NON_INTEGER;
o = div64_u64(i * m, n * (1 << p));
if (!d)
pr_debug("%s: %lu: found exact match: %llu/%llu/%llu\n",
clk_hw_get_name(hw), rate, m, n, p);
else
pr_debug("%s: %lu: found closest: %llu/%llu/%llu - %llu\n",
clk_hw_get_name(hw), rate, m, n, p, o);
return o;
}
static long clk_usb_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct lpc32xx_pll_clk *clk = to_lpc32xx_pll_clk(hw);
struct clk_hw *usb_div_hw, *osc_hw;
u64 d_i, n_i, m, o;
pr_debug("%s: %lu/%lu\n", clk_hw_get_name(hw), *parent_rate, rate);
/*
* The only supported USB clock is 48MHz, with PLL internal constraints
* on Fclkin, Fcco and Fref this implies that Fcco must be 192MHz
* and post-divider must be 4, this slightly simplifies calculation of
* USB divider, USB PLL N and M parameters.
*/
if (rate != 48000000)
return -EINVAL;
/* USB divider clock */
usb_div_hw = clk_hw_get_parent_by_index(hw, 0);
if (!usb_div_hw)
return -EINVAL;
/* Main oscillator clock */
osc_hw = clk_hw_get_parent_by_index(usb_div_hw, 0);
if (!osc_hw)
return -EINVAL;
o = clk_hw_get_rate(osc_hw); /* must be in range 1..20 MHz */
/* Check if valid USB divider and USB PLL parameters exists */
for (d_i = 16; d_i >= 1; d_i--) {
for (n_i = 1; n_i <= 4; n_i++) {
m = div64_u64(192000000 * d_i * n_i, o);
if (!(m && m <= 256
&& m * o == 192000000 * d_i * n_i
&& pll_is_valid(o, d_i, 1000000, 20000000)
&& pll_is_valid(o, d_i * n_i, 1000000, 27000000)))
continue;
clk->n_div = n_i;
clk->m_div = m;
clk->p_div = 2;
clk->mode = PLL_NON_INTEGER;
*parent_rate = div64_u64(o, d_i);
return rate;
}
}
return -EINVAL;
}
#define LPC32XX_DEFINE_PLL_OPS(_name, _rc, _sr, _rr) \
static const struct clk_ops clk_ ##_name ## _ops = { \
.enable = clk_pll_enable, \
.disable = clk_pll_disable, \
.is_enabled = clk_pll_is_enabled, \
.recalc_rate = _rc, \
.set_rate = _sr, \
.round_rate = _rr, \
}
LPC32XX_DEFINE_PLL_OPS(pll_397x, clk_pll_397x_recalc_rate, NULL, NULL);
LPC32XX_DEFINE_PLL_OPS(hclk_pll, clk_pll_recalc_rate,
clk_pll_set_rate, clk_hclk_pll_round_rate);
LPC32XX_DEFINE_PLL_OPS(usb_pll, clk_pll_recalc_rate,
clk_pll_set_rate, clk_usb_pll_round_rate);
static int clk_ddram_is_enabled(struct clk_hw *hw)
{
struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
u32 val;
regmap_read(clk_regmap, clk->reg, &val);
val &= clk->enable_mask | clk->busy_mask;
return (val == (BIT(7) | BIT(0)) ||
val == (BIT(8) | BIT(1)));
}
static int clk_ddram_enable(struct clk_hw *hw)
{
struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
u32 val, hclk_div;
regmap_read(clk_regmap, clk->reg, &val);
hclk_div = val & clk->busy_mask;
/*
* DDRAM clock must be 2 times higher than HCLK,
* this implies DDRAM clock can not be enabled,
* if HCLK clock rate is equal to ARM clock rate
*/
if (hclk_div == 0x0 || hclk_div == (BIT(1) | BIT(0)))
return -EINVAL;
return regmap_update_bits(clk_regmap, clk->reg,
clk->enable_mask, hclk_div << 7);
}
static unsigned long clk_ddram_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
u32 val;
if (!clk_ddram_is_enabled(hw))
return 0;
regmap_read(clk_regmap, clk->reg, &val);
val &= clk->enable_mask;
return parent_rate / (val >> 7);
}
static const struct clk_ops clk_ddram_ops = {
.enable = clk_ddram_enable,
.disable = clk_mask_disable,
.is_enabled = clk_ddram_is_enabled,
.recalc_rate = clk_ddram_recalc_rate,
};
static unsigned long lpc32xx_clk_uart_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct lpc32xx_clk *clk = to_lpc32xx_clk(hw);
u32 val, x, y;
regmap_read(clk_regmap, clk->reg, &val);
x = (val & 0xFF00) >> 8;
y = val & 0xFF;
if (x && y)
return (parent_rate * x) / y;
else
return 0;
}
static const struct clk_ops lpc32xx_uart_div_ops = {
.recalc_rate = lpc32xx_clk_uart_recalc_rate,
};
static const struct clk_div_table clk_hclk_div_table[] = {
{ .val = 0, .div = 1 },
{ .val = 1, .div = 2 },
{ .val = 2, .div = 4 },
{ },
};
static u32 test1_mux_table[] = { 0, 1, 2, };
static u32 test2_mux_table[] = { 0, 1, 2, 5, 7, };
static int clk_usb_enable(struct clk_hw *hw)
{
struct lpc32xx_usb_clk *clk = to_lpc32xx_usb_clk(hw);
u32 val, ctrl_val, count;
pr_debug("%s: 0x%x\n", clk_hw_get_name(hw), clk->enable);
if (clk->ctrl_mask) {
regmap_read(clk_regmap, LPC32XX_CLKPWR_USB_CTRL, &ctrl_val);
regmap_update_bits(clk_regmap, LPC32XX_CLKPWR_USB_CTRL,
clk->ctrl_mask, clk->ctrl_enable);
}
val = lpc32xx_usb_clk_read(clk);
if (clk->busy && (val & clk->busy) == clk->busy) {
if (clk->ctrl_mask)
regmap_write(clk_regmap, LPC32XX_CLKPWR_USB_CTRL,
ctrl_val);
return -EBUSY;
}
val |= clk->enable;
lpc32xx_usb_clk_write(clk, val);
for (count = 0; count < 1000; count++) {
val = lpc32xx_usb_clk_read(clk);
if ((val & clk->enable) == clk->enable)
break;
}
if ((val & clk->enable) == clk->enable)
return 0;
if (clk->ctrl_mask)
regmap_write(clk_regmap, LPC32XX_CLKPWR_USB_CTRL, ctrl_val);
return -ETIMEDOUT;
}
static void clk_usb_disable(struct clk_hw *hw)
{
struct lpc32xx_usb_clk *clk = to_lpc32xx_usb_clk(hw);
u32 val = lpc32xx_usb_clk_read(clk);
val &= ~clk->enable;
lpc32xx_usb_clk_write(clk, val);
if (clk->ctrl_mask)
regmap_update_bits(clk_regmap, LPC32XX_CLKPWR_USB_CTRL,
clk->ctrl_mask, clk->ctrl_disable);
}
static int clk_usb_is_enabled(struct clk_hw *hw)
{
struct lpc32xx_usb_clk *clk = to_lpc32xx_usb_clk(hw);
u32 ctrl_val, val;
if (clk->ctrl_mask) {
regmap_read(clk_regmap, LPC32XX_CLKPWR_USB_CTRL, &ctrl_val);
if ((ctrl_val & clk->ctrl_mask) != clk->ctrl_enable)
return 0;
}
val = lpc32xx_usb_clk_read(clk);
return ((val & clk->enable) == clk->enable);
}
static unsigned long clk_usb_i2c_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
return clk_get_rate(clk[LPC32XX_CLK_PERIPH]);
}
static const struct clk_ops clk_usb_ops = {
.enable = clk_usb_enable,
.disable = clk_usb_disable,
.is_enabled = clk_usb_is_enabled,
};
static const struct clk_ops clk_usb_i2c_ops = {
.enable = clk_usb_enable,
.disable = clk_usb_disable,
.is_enabled = clk_usb_is_enabled,
.recalc_rate = clk_usb_i2c_recalc_rate,
};
static int lpc32xx_clk_gate_enable(struct clk_hw *hw)
{
struct lpc32xx_clk_gate *clk = to_lpc32xx_gate(hw);
u32 mask = BIT(clk->bit_idx);
u32 val = (clk->flags & CLK_GATE_SET_TO_DISABLE ? 0x0 : mask);
return regmap_update_bits(clk_regmap, clk->reg, mask, val);
}
static void lpc32xx_clk_gate_disable(struct clk_hw *hw)
{
struct lpc32xx_clk_gate *clk = to_lpc32xx_gate(hw);
u32 mask = BIT(clk->bit_idx);
u32 val = (clk->flags & CLK_GATE_SET_TO_DISABLE ? mask : 0x0);
regmap_update_bits(clk_regmap, clk->reg, mask, val);
}
static int lpc32xx_clk_gate_is_enabled(struct clk_hw *hw)
{
struct lpc32xx_clk_gate *clk = to_lpc32xx_gate(hw);
u32 val;
bool is_set;
regmap_read(clk_regmap, clk->reg, &val);
is_set = val & BIT(clk->bit_idx);
return (clk->flags & CLK_GATE_SET_TO_DISABLE ? !is_set : is_set);
}
static const struct clk_ops lpc32xx_clk_gate_ops = {
.enable = lpc32xx_clk_gate_enable,
.disable = lpc32xx_clk_gate_disable,
.is_enabled = lpc32xx_clk_gate_is_enabled,
};
#define div_mask(width) ((1 << (width)) - 1)
static unsigned int _get_table_div(const struct clk_div_table *table,
unsigned int val)
{
const struct clk_div_table *clkt;
for (clkt = table; clkt->div; clkt++)
if (clkt->val == val)
return clkt->div;
return 0;
}
static unsigned int _get_div(const struct clk_div_table *table,
unsigned int val, unsigned long flags, u8 width)
{
if (flags & CLK_DIVIDER_ONE_BASED)
return val;
if (table)
return _get_table_div(table, val);
return val + 1;
}
static unsigned long clk_divider_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct lpc32xx_clk_div *divider = to_lpc32xx_div(hw);
unsigned int val;
regmap_read(clk_regmap, divider->reg, &val);
val >>= divider->shift;
val &= div_mask(divider->width);
return divider_recalc_rate(hw, parent_rate, val, divider->table,
divider->flags, divider->width);
}
static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct lpc32xx_clk_div *divider = to_lpc32xx_div(hw);
unsigned int bestdiv;
/* if read only, just return current value */
if (divider->flags & CLK_DIVIDER_READ_ONLY) {
regmap_read(clk_regmap, divider->reg, &bestdiv);
bestdiv >>= divider->shift;
bestdiv &= div_mask(divider->width);
bestdiv = _get_div(divider->table, bestdiv, divider->flags,
divider->width);
return DIV_ROUND_UP(*prate, bestdiv);
}
return divider_round_rate(hw, rate, prate, divider->table,
divider->width, divider->flags);
}
static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct lpc32xx_clk_div *divider = to_lpc32xx_div(hw);
unsigned int value;
value = divider_get_val(rate, parent_rate, divider->table,
divider->width, divider->flags);
return regmap_update_bits(clk_regmap, divider->reg,
div_mask(divider->width) << divider->shift,
value << divider->shift);
}
static const struct clk_ops lpc32xx_clk_divider_ops = {
.recalc_rate = clk_divider_recalc_rate,
.round_rate = clk_divider_round_rate,
.set_rate = clk_divider_set_rate,
};
static u8 clk_mux_get_parent(struct clk_hw *hw)
{
struct lpc32xx_clk_mux *mux = to_lpc32xx_mux(hw);
u32 num_parents = clk_hw_get_num_parents(hw);
u32 val;
regmap_read(clk_regmap, mux->reg, &val);
val >>= mux->shift;
val &= mux->mask;
if (mux->table) {
u32 i;
for (i = 0; i < num_parents; i++)
if (mux->table[i] == val)
return i;
return -EINVAL;
}
if (val >= num_parents)
return -EINVAL;
return val;
}
static int clk_mux_set_parent(struct clk_hw *hw, u8 index)
{
struct lpc32xx_clk_mux *mux = to_lpc32xx_mux(hw);
if (mux->table)
index = mux->table[index];
return regmap_update_bits(clk_regmap, mux->reg,
mux->mask << mux->shift, index << mux->shift);
}
static const struct clk_ops lpc32xx_clk_mux_ro_ops = {
.get_parent = clk_mux_get_parent,
};
static const struct clk_ops lpc32xx_clk_mux_ops = {
.get_parent = clk_mux_get_parent,
.set_parent = clk_mux_set_parent,
.determine_rate = __clk_mux_determine_rate,
};
enum lpc32xx_clk_type {
CLK_FIXED,
CLK_MUX,
CLK_DIV,
CLK_GATE,
CLK_COMPOSITE,
CLK_LPC32XX,
CLK_LPC32XX_PLL,
CLK_LPC32XX_USB,
};
struct clk_hw_proto0 {
const struct clk_ops *ops;
union {
struct lpc32xx_pll_clk pll;
struct lpc32xx_clk clk;
struct lpc32xx_usb_clk usb_clk;
struct lpc32xx_clk_mux mux;
struct lpc32xx_clk_div div;
struct lpc32xx_clk_gate gate;
};
};
struct clk_hw_proto1 {
struct clk_hw_proto0 *mux;
struct clk_hw_proto0 *div;
struct clk_hw_proto0 *gate;
};
struct clk_hw_proto {
enum lpc32xx_clk_type type;
union {
struct clk_fixed_rate f;
struct clk_hw_proto0 hw0;
struct clk_hw_proto1 hw1;
};
};
#define LPC32XX_DEFINE_FIXED(_idx, _rate) \
[CLK_PREFIX(_idx)] = { \
.type = CLK_FIXED, \
{ \
.f = { \
.fixed_rate = (_rate), \
}, \
}, \
}
#define LPC32XX_DEFINE_PLL(_idx, _name, _reg, _enable) \
[CLK_PREFIX(_idx)] = { \
.type = CLK_LPC32XX_PLL, \
{ \
.hw0 = { \
.ops = &clk_ ##_name ## _ops, \
{ \
.pll = { \
.reg = LPC32XX_CLKPWR_ ## _reg, \
.enable = (_enable), \
}, \
}, \
}, \
}, \
}
#define LPC32XX_DEFINE_MUX(_idx, _reg, _shift, _mask, _table, _flags) \
[CLK_PREFIX(_idx)] = { \
.type = CLK_MUX, \
{ \
.hw0 = { \
.ops = (_flags & CLK_MUX_READ_ONLY ? \
&lpc32xx_clk_mux_ro_ops : \
&lpc32xx_clk_mux_ops), \
{ \
.mux = { \
.reg = LPC32XX_CLKPWR_ ## _reg, \
.mask = (_mask), \
.shift = (_shift), \
.table = (_table), \
.flags = (_flags), \
}, \
}, \
}, \
}, \
}
#define LPC32XX_DEFINE_DIV(_idx, _reg, _shift, _width, _table, _flags) \
[CLK_PREFIX(_idx)] = { \
.type = CLK_DIV, \
{ \
.hw0 = { \
.ops = &lpc32xx_clk_divider_ops, \
{ \
.div = { \
.reg = LPC32XX_CLKPWR_ ## _reg, \
.shift = (_shift), \
.width = (_width), \
.table = (_table), \
.flags = (_flags), \
}, \
}, \
}, \
}, \
}
#define LPC32XX_DEFINE_GATE(_idx, _reg, _bit, _flags) \
[CLK_PREFIX(_idx)] = { \
.type = CLK_GATE, \
{ \
.hw0 = { \
.ops = &lpc32xx_clk_gate_ops, \
{ \
.gate = { \
.reg = LPC32XX_CLKPWR_ ## _reg, \
.bit_idx = (_bit), \
.flags = (_flags), \
}, \
}, \
}, \
}, \
}
#define LPC32XX_DEFINE_CLK(_idx, _reg, _e, _em, _d, _dm, _b, _bm, _ops) \
[CLK_PREFIX(_idx)] = { \
.type = CLK_LPC32XX, \
{ \
.hw0 = { \
.ops = &(_ops), \
{ \
.clk = { \
.reg = LPC32XX_CLKPWR_ ## _reg, \
.enable = (_e), \
.enable_mask = (_em), \
.disable = (_d), \
.disable_mask = (_dm), \
.busy = (_b), \
.busy_mask = (_bm), \
}, \
}, \
}, \
}, \
}
#define LPC32XX_DEFINE_USB(_idx, _ce, _cd, _cm, _e, _b, _ops) \
[CLK_PREFIX(_idx)] = { \
.type = CLK_LPC32XX_USB, \
{ \
.hw0 = { \
.ops = &(_ops), \
{ \
.usb_clk = { \
.ctrl_enable = (_ce), \
.ctrl_disable = (_cd), \
.ctrl_mask = (_cm), \
.enable = (_e), \
.busy = (_b), \
} \
}, \
} \
}, \
}
#define LPC32XX_DEFINE_COMPOSITE(_idx, _mux, _div, _gate) \
[CLK_PREFIX(_idx)] = { \
.type = CLK_COMPOSITE, \
{ \
.hw1 = { \
.mux = (CLK_PREFIX(_mux) == LPC32XX_CLK__NULL ? NULL : \
&clk_hw_proto[CLK_PREFIX(_mux)].hw0), \
.div = (CLK_PREFIX(_div) == LPC32XX_CLK__NULL ? NULL : \
&clk_hw_proto[CLK_PREFIX(_div)].hw0), \
.gate = (CLK_PREFIX(_gate) == LPC32XX_CLK__NULL ? NULL :\
&clk_hw_proto[CLK_PREFIX(_gate)].hw0), \
}, \
}, \
}
static struct clk_hw_proto clk_hw_proto[LPC32XX_CLK_HW_MAX] = {
LPC32XX_DEFINE_FIXED(RTC, 32768),
LPC32XX_DEFINE_PLL(PLL397X, pll_397x, HCLKPLL_CTRL, BIT(1)),
LPC32XX_DEFINE_PLL(HCLK_PLL, hclk_pll, HCLKPLL_CTRL, PLL_CTRL_ENABLE),
LPC32XX_DEFINE_PLL(USB_PLL, usb_pll, USB_CTRL, PLL_CTRL_ENABLE),
LPC32XX_DEFINE_GATE(OSC, OSC_CTRL, 0, CLK_GATE_SET_TO_DISABLE),
LPC32XX_DEFINE_GATE(USB, USB_CTRL, 18, 0),
LPC32XX_DEFINE_DIV(HCLK_DIV_PERIPH, HCLKDIV_CTRL, 2, 5, NULL,
CLK_DIVIDER_READ_ONLY),
LPC32XX_DEFINE_DIV(HCLK_DIV, HCLKDIV_CTRL, 0, 2, clk_hclk_div_table,
CLK_DIVIDER_READ_ONLY),
/* Register 3 read-only muxes with a single control PWR_CTRL[2] */
LPC32XX_DEFINE_MUX(SYSCLK_PERIPH_MUX, PWR_CTRL, 2, 0x1, NULL,
CLK_MUX_READ_ONLY),
LPC32XX_DEFINE_MUX(SYSCLK_HCLK_MUX, PWR_CTRL, 2, 0x1, NULL,
CLK_MUX_READ_ONLY),
LPC32XX_DEFINE_MUX(SYSCLK_ARM_MUX, PWR_CTRL, 2, 0x1, NULL,
CLK_MUX_READ_ONLY),
/* Register 2 read-only muxes with a single control PWR_CTRL[10] */
LPC32XX_DEFINE_MUX(PERIPH_HCLK_MUX, PWR_CTRL, 10, 0x1, NULL,
CLK_MUX_READ_ONLY),
LPC32XX_DEFINE_MUX(PERIPH_ARM_MUX, PWR_CTRL, 10, 0x1, NULL,
CLK_MUX_READ_ONLY),
/* 3 always on gates with a single control PWR_CTRL[0] same as OSC */
LPC32XX_DEFINE_GATE(PERIPH, PWR_CTRL, 0, CLK_GATE_SET_TO_DISABLE),
LPC32XX_DEFINE_GATE(HCLK, PWR_CTRL, 0, CLK_GATE_SET_TO_DISABLE),
LPC32XX_DEFINE_GATE(ARM, PWR_CTRL, 0, CLK_GATE_SET_TO_DISABLE),
LPC32XX_DEFINE_GATE(ARM_VFP, DEBUG_CTRL, 4, 0),
LPC32XX_DEFINE_GATE(DMA, DMA_CLK_CTRL, 0, 0),
LPC32XX_DEFINE_CLK(DDRAM, HCLKDIV_CTRL, 0x0, BIT(8) | BIT(7),
0x0, BIT(8) | BIT(7), 0x0, BIT(1) | BIT(0), clk_ddram_ops),
LPC32XX_DEFINE_GATE(TIMER0, TIMCLK_CTRL1, 2, 0),
LPC32XX_DEFINE_GATE(TIMER1, TIMCLK_CTRL1, 3, 0),
LPC32XX_DEFINE_GATE(TIMER2, TIMCLK_CTRL1, 4, 0),
LPC32XX_DEFINE_GATE(TIMER3, TIMCLK_CTRL1, 5, 0),
LPC32XX_DEFINE_GATE(TIMER4, TIMCLK_CTRL1, 0, 0),
LPC32XX_DEFINE_GATE(TIMER5, TIMCLK_CTRL1, 1, 0),
LPC32XX_DEFINE_GATE(SSP0, SSP_CTRL, 0, 0),
LPC32XX_DEFINE_GATE(SSP1, SSP_CTRL, 1, 0),
LPC32XX_DEFINE_GATE(SPI1, SPI_CTRL, 0, 0),
LPC32XX_DEFINE_GATE(SPI2, SPI_CTRL, 4, 0),
LPC32XX_DEFINE_GATE(I2S0, I2S_CTRL, 0, 0),
LPC32XX_DEFINE_GATE(I2S1, I2S_CTRL, 1, 0),
LPC32XX_DEFINE_GATE(I2C1, I2CCLK_CTRL, 0, 0),
LPC32XX_DEFINE_GATE(I2C2, I2CCLK_CTRL, 1, 0),
LPC32XX_DEFINE_GATE(WDOG, TIMCLK_CTRL, 0, 0),
LPC32XX_DEFINE_GATE(HSTIMER, TIMCLK_CTRL, 1, 0),
LPC32XX_DEFINE_GATE(KEY, KEYCLK_CTRL, 0, 0),
LPC32XX_DEFINE_GATE(MCPWM, TIMCLK_CTRL1, 6, 0),
LPC32XX_DEFINE_MUX(PWM1_MUX, PWMCLK_CTRL, 1, 0x1, NULL, 0),
LPC32XX_DEFINE_DIV(PWM1_DIV, PWMCLK_CTRL, 4, 4, NULL,
CLK_DIVIDER_ONE_BASED),
LPC32XX_DEFINE_GATE(PWM1_GATE, PWMCLK_CTRL, 0, 0),
LPC32XX_DEFINE_COMPOSITE(PWM1, PWM1_MUX, PWM1_DIV, PWM1_GATE),
LPC32XX_DEFINE_MUX(PWM2_MUX, PWMCLK_CTRL, 3, 0x1, NULL, 0),
LPC32XX_DEFINE_DIV(PWM2_DIV, PWMCLK_CTRL, 8, 4, NULL,
CLK_DIVIDER_ONE_BASED),
LPC32XX_DEFINE_GATE(PWM2_GATE, PWMCLK_CTRL, 2, 0),
LPC32XX_DEFINE_COMPOSITE(PWM2, PWM2_MUX, PWM2_DIV, PWM2_GATE),
LPC32XX_DEFINE_MUX(UART3_MUX, UART3_CLK_CTRL, 16, 0x1, NULL, 0),
LPC32XX_DEFINE_CLK(UART3_DIV, UART3_CLK_CTRL,
0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
LPC32XX_DEFINE_GATE(UART3_GATE, UART_CLK_CTRL, 0, 0),
LPC32XX_DEFINE_COMPOSITE(UART3, UART3_MUX, UART3_DIV, UART3_GATE),
LPC32XX_DEFINE_MUX(UART4_MUX, UART4_CLK_CTRL, 16, 0x1, NULL, 0),
LPC32XX_DEFINE_CLK(UART4_DIV, UART4_CLK_CTRL,
0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
LPC32XX_DEFINE_GATE(UART4_GATE, UART_CLK_CTRL, 1, 0),
LPC32XX_DEFINE_COMPOSITE(UART4, UART4_MUX, UART4_DIV, UART4_GATE),
LPC32XX_DEFINE_MUX(UART5_MUX, UART5_CLK_CTRL, 16, 0x1, NULL, 0),
LPC32XX_DEFINE_CLK(UART5_DIV, UART5_CLK_CTRL,
0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
LPC32XX_DEFINE_GATE(UART5_GATE, UART_CLK_CTRL, 2, 0),
LPC32XX_DEFINE_COMPOSITE(UART5, UART5_MUX, UART5_DIV, UART5_GATE),
LPC32XX_DEFINE_MUX(UART6_MUX, UART6_CLK_CTRL, 16, 0x1, NULL, 0),
LPC32XX_DEFINE_CLK(UART6_DIV, UART6_CLK_CTRL,
0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
LPC32XX_DEFINE_GATE(UART6_GATE, UART_CLK_CTRL, 3, 0),
LPC32XX_DEFINE_COMPOSITE(UART6, UART6_MUX, UART6_DIV, UART6_GATE),
LPC32XX_DEFINE_CLK(IRDA, IRDA_CLK_CTRL,
0, 0, 0, 0, 0, 0, lpc32xx_uart_div_ops),
LPC32XX_DEFINE_MUX(TEST1_MUX, TEST_CLK_CTRL, 5, 0x3,
test1_mux_table, 0),
LPC32XX_DEFINE_GATE(TEST1_GATE, TEST_CLK_CTRL, 4, 0),
LPC32XX_DEFINE_COMPOSITE(TEST1, TEST1_MUX, _NULL, TEST1_GATE),
LPC32XX_DEFINE_MUX(TEST2_MUX, TEST_CLK_CTRL, 1, 0x7,
test2_mux_table, 0),
LPC32XX_DEFINE_GATE(TEST2_GATE, TEST_CLK_CTRL, 0, 0),
LPC32XX_DEFINE_COMPOSITE(TEST2, TEST2_MUX, _NULL, TEST2_GATE),
LPC32XX_DEFINE_MUX(SYS, SYSCLK_CTRL, 0, 0x1, NULL, CLK_MUX_READ_ONLY),
LPC32XX_DEFINE_DIV(USB_DIV_DIV, USB_DIV, 0, 4, NULL, 0),
LPC32XX_DEFINE_GATE(USB_DIV_GATE, USB_CTRL, 17, 0),
LPC32XX_DEFINE_COMPOSITE(USB_DIV, _NULL, USB_DIV_DIV, USB_DIV_GATE),
LPC32XX_DEFINE_DIV(SD_DIV, MS_CTRL, 0, 4, NULL, CLK_DIVIDER_ONE_BASED),
LPC32XX_DEFINE_CLK(SD_GATE, MS_CTRL, BIT(5) | BIT(9), BIT(5) | BIT(9),
0x0, BIT(5) | BIT(9), 0x0, 0x0, clk_mask_ops),
LPC32XX_DEFINE_COMPOSITE(SD, _NULL, SD_DIV, SD_GATE),
LPC32XX_DEFINE_DIV(LCD_DIV, LCDCLK_CTRL, 0, 5, NULL, 0),
LPC32XX_DEFINE_GATE(LCD_GATE, LCDCLK_CTRL, 5, 0),
LPC32XX_DEFINE_COMPOSITE(LCD, _NULL, LCD_DIV, LCD_GATE),
LPC32XX_DEFINE_CLK(MAC, MACCLK_CTRL,
BIT(2) | BIT(1) | BIT(0), BIT(2) | BIT(1) | BIT(0),
BIT(2) | BIT(1) | BIT(0), BIT(2) | BIT(1) | BIT(0),
0x0, 0x0, clk_mask_ops),
LPC32XX_DEFINE_CLK(SLC, FLASHCLK_CTRL,
BIT(2) | BIT(0), BIT(2) | BIT(0), 0x0,
BIT(0), BIT(1), BIT(2) | BIT(1), clk_mask_ops),
LPC32XX_DEFINE_CLK(MLC, FLASHCLK_CTRL,
BIT(1), BIT(2) | BIT(1), 0x0, BIT(1),
BIT(2) | BIT(0), BIT(2) | BIT(0), clk_mask_ops),
/*
* ADC/TS clock unfortunately cannot be registered as a composite one
* due to a different connection of gate, div and mux, e.g. gating it
* won't mean that the clock is off, if peripheral clock is its parent:
*
* rtc-->[gate]-->| |
* | mux |--> adc/ts
* pclk-->[div]-->| |
*
* Constraints:
* ADC --- resulting clock must be <= 4.5 MHz
* TS --- resulting clock must be <= 400 KHz
*/
LPC32XX_DEFINE_DIV(ADC_DIV, ADCCLK_CTRL1, 0, 8, NULL, 0),
LPC32XX_DEFINE_GATE(ADC_RTC, ADCCLK_CTRL, 0, 0),
LPC32XX_DEFINE_MUX(ADC, ADCCLK_CTRL1, 8, 0x1, NULL, 0),
/* USB controller clocks */
LPC32XX_DEFINE_USB(USB_AHB,
BIT(24), 0x0, BIT(24), BIT(4), 0, clk_usb_ops),
LPC32XX_DEFINE_USB(USB_OTG,
0x0, 0x0, 0x0, BIT(3), 0, clk_usb_ops),
LPC32XX_DEFINE_USB(USB_I2C,
0x0, BIT(23), BIT(23), BIT(2), 0, clk_usb_i2c_ops),
LPC32XX_DEFINE_USB(USB_DEV,
BIT(22), 0x0, BIT(22), BIT(1), BIT(0), clk_usb_ops),
LPC32XX_DEFINE_USB(USB_HOST,
BIT(21), 0x0, BIT(21), BIT(0), BIT(1), clk_usb_ops),
};
static struct clk * __init lpc32xx_clk_register(u32 id)
{
const struct clk_proto_t *lpc32xx_clk = &clk_proto[id];
struct clk_hw_proto *clk_hw = &clk_hw_proto[id];
const char *parents[LPC32XX_CLK_PARENTS_MAX];
struct clk *clk;
unsigned int i;
for (i = 0; i < lpc32xx_clk->num_parents; i++)
parents[i] = clk_proto[lpc32xx_clk->parents[i]].name;
pr_debug("%s: derived from '%s', clock type %d\n", lpc32xx_clk->name,
parents[0], clk_hw->type);
switch (clk_hw->type) {
case CLK_LPC32XX:
case CLK_LPC32XX_PLL:
case CLK_LPC32XX_USB:
case CLK_MUX:
case CLK_DIV:
case CLK_GATE:
{
struct clk_init_data clk_init = {
.name = lpc32xx_clk->name,
.parent_names = parents,
.num_parents = lpc32xx_clk->num_parents,
.flags = lpc32xx_clk->flags,
.ops = clk_hw->hw0.ops,
};
struct clk_hw *hw;
if (clk_hw->type == CLK_LPC32XX)
hw = &clk_hw->hw0.clk.hw;
else if (clk_hw->type == CLK_LPC32XX_PLL)
hw = &clk_hw->hw0.pll.hw;
else if (clk_hw->type == CLK_LPC32XX_USB)
hw = &clk_hw->hw0.usb_clk.hw;
else if (clk_hw->type == CLK_MUX)
hw = &clk_hw->hw0.mux.hw;
else if (clk_hw->type == CLK_DIV)
hw = &clk_hw->hw0.div.hw;
else if (clk_hw->type == CLK_GATE)
hw = &clk_hw->hw0.gate.hw;
else
return ERR_PTR(-EINVAL);
hw->init = &clk_init;
clk = clk_register(NULL, hw);
break;
}
case CLK_COMPOSITE:
{
struct clk_hw *mux_hw = NULL, *div_hw = NULL, *gate_hw = NULL;
const struct clk_ops *mops = NULL, *dops = NULL, *gops = NULL;
struct clk_hw_proto0 *mux0, *div0, *gate0;
mux0 = clk_hw->hw1.mux;
div0 = clk_hw->hw1.div;
gate0 = clk_hw->hw1.gate;
if (mux0) {
mops = mux0->ops;
mux_hw = &mux0->clk.hw;
}
if (div0) {
dops = div0->ops;
div_hw = &div0->clk.hw;
}
if (gate0) {
gops = gate0->ops;
gate_hw = &gate0->clk.hw;
}
clk = clk_register_composite(NULL, lpc32xx_clk->name,
parents, lpc32xx_clk->num_parents,
mux_hw, mops, div_hw, dops,
gate_hw, gops, lpc32xx_clk->flags);
break;
}
case CLK_FIXED:
{
struct clk_fixed_rate *fixed = &clk_hw->f;
clk = clk_register_fixed_rate(NULL, lpc32xx_clk->name,
parents[0], 0, fixed->fixed_rate);
break;
}
default:
clk = ERR_PTR(-EINVAL);
}
return clk;
}
static void __init lpc32xx_clk_div_quirk(u32 reg, u32 div_mask, u32 gate)
{
u32 val;
regmap_read(clk_regmap, reg, &val);
if (!(val & div_mask)) {
val &= ~gate;
val |= BIT(__ffs(div_mask));
}
regmap_update_bits(clk_regmap, reg, gate | div_mask, val);
}
static void __init lpc32xx_clk_init(struct device_node *np)
{
unsigned int i;
struct clk *clk_osc, *clk_32k;
void __iomem *base = NULL;
/* Ensure that parent clocks are available and valid */
clk_32k = of_clk_get_by_name(np, clk_proto[LPC32XX_CLK_XTAL_32K].name);
if (IS_ERR(clk_32k)) {
pr_err("failed to find external 32KHz clock: %ld\n",
PTR_ERR(clk_32k));
return;
}
if (clk_get_rate(clk_32k) != 32768) {
pr_err("invalid clock rate of external 32KHz oscillator\n");
return;
}
clk_osc = of_clk_get_by_name(np, clk_proto[LPC32XX_CLK_XTAL].name);
if (IS_ERR(clk_osc)) {
pr_err("failed to find external main oscillator clock: %ld\n",
PTR_ERR(clk_osc));
return;
}
base = of_iomap(np, 0);
if (!base) {
pr_err("failed to map system control block registers\n");
return;
}
clk_regmap = regmap_init_mmio(NULL, base, &lpc32xx_scb_regmap_config);
if (IS_ERR(clk_regmap)) {
pr_err("failed to regmap system control block: %ld\n",
PTR_ERR(clk_regmap));
iounmap(base);
return;
}
/*
* Divider part of PWM and MS clocks requires a quirk to avoid
* a misinterpretation of formally valid zero value in register
* bitfield, which indicates another clock gate. Instead of
* adding complexity to a gate clock ensure that zero value in
* divider clock is never met in runtime.
*/
lpc32xx_clk_div_quirk(LPC32XX_CLKPWR_PWMCLK_CTRL, 0xf0, BIT(0));
lpc32xx_clk_div_quirk(LPC32XX_CLKPWR_PWMCLK_CTRL, 0xf00, BIT(2));
lpc32xx_clk_div_quirk(LPC32XX_CLKPWR_MS_CTRL, 0xf, BIT(5) | BIT(9));
for (i = 1; i < LPC32XX_CLK_MAX; i++) {
clk[i] = lpc32xx_clk_register(i);
if (IS_ERR(clk[i])) {
pr_err("failed to register %s clock: %ld\n",
clk_proto[i].name, PTR_ERR(clk[i]));
clk[i] = NULL;
}
}
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
/* Set 48MHz rate of USB PLL clock */
clk_set_rate(clk[LPC32XX_CLK_USB_PLL], 48000000);
/* These two clocks must be always on independently on consumers */
clk_prepare_enable(clk[LPC32XX_CLK_ARM]);
clk_prepare_enable(clk[LPC32XX_CLK_HCLK]);
/* Enable ARM VFP by default */
clk_prepare_enable(clk[LPC32XX_CLK_ARM_VFP]);
/* Disable enabled by default clocks for NAND MLC and SLC */
clk_mask_disable(&clk_hw_proto[LPC32XX_CLK_SLC].hw0.clk.hw);
clk_mask_disable(&clk_hw_proto[LPC32XX_CLK_MLC].hw0.clk.hw);
}
CLK_OF_DECLARE(lpc32xx_clk, "nxp,lpc3220-clk", lpc32xx_clk_init);
static void __init lpc32xx_usb_clk_init(struct device_node *np)
{
unsigned int i;
usb_clk_vbase = of_iomap(np, 0);
if (!usb_clk_vbase) {
pr_err("failed to map address range\n");
return;
}
for (i = 1; i < LPC32XX_USB_CLK_MAX; i++) {
usb_clk[i] = lpc32xx_clk_register(i + LPC32XX_CLK_USB_OFFSET);
if (IS_ERR(usb_clk[i])) {
pr_err("failed to register %s clock: %ld\n",
clk_proto[i].name, PTR_ERR(usb_clk[i]));
usb_clk[i] = NULL;
}
}
of_clk_add_provider(np, of_clk_src_onecell_get, &usb_clk_data);
}
CLK_OF_DECLARE(lpc32xx_usb_clk, "nxp,lpc3220-usb-clk", lpc32xx_usb_clk_init);
View git blame Copy permalink