| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Vladimir Zapolskiy | 7674 | 99.30% | 2 | 14.29% |
| Sylvain Lemieux | 24 | 0.31% | 3 | 21.43% |
| Arvind Yadav | 7 | 0.09% | 2 | 14.29% |
| Gabriel Fernandez | 6 | 0.08% | 1 | 7.14% |
| Jeffy Chen | 5 | 0.06% | 1 | 7.14% |
| Jerome Brunet | 4 | 0.05% | 1 | 7.14% |
| Michael Turquette | 3 | 0.04% | 1 | 7.14% |
| Stephen Boyd | 2 | 0.03% | 1 | 7.14% |
| Thomas Gleixner | 2 | 0.03% | 1 | 7.14% |
| Javier Carrasco | 1 | 0.01% | 1 | 7.14% |
| Total | 7728 | 14 |
// 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 const 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);
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