[PATCH v2 5/5] clk: lpc32xx: add common clock framework driver

Vladimir Zapolskiy
2015-12-06T10:45:57Z

Add support for all configurable clocks found on NXP LPC32xx SoC.

The list contains several heterogenous groups of clocks:
* system clocks including multiple dividers and muxes,
* x397 PLL, HCLK PLL and USB PLL,
* peripheral clocks inherited from rtc, hclk and pclk,
* USB controller clocks: AHB slave, I2C, OTG, OHCI and device.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
---
Changes from v1 to v2:
- LPC32XX_CLK_DEFINE() does not stringify clock names
- fixed a minor bug in clk_pll_set_rate()

drivers/clk/Kconfig | 3 +-
drivers/clk/nxp/Makefile | 1 +
drivers/clk/nxp/clk-lpc32xx.c | 1569 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 1572 insertions(+), 1 deletion(-)
create mode 100644 drivers/clk/nxp/clk-lpc32xx.c

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 7fc1eb9..9310cf4 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -176,7 +176,8 @@ config COMMON_CLK_PWM
at 50% duty cycle.

config COMMON_CLK_NXP
- def_bool COMMON_CLK && ARCH_LPC18XX
+ def_bool COMMON_CLK && (ARCH_LPC18XX || ARCH_LPC32XX)
+ select REGMAP_MMIO if ARCH_LPC32XX
---help---
Support for clock providers on NXP platforms.

diff --git a/drivers/clk/nxp/Makefile b/drivers/clk/nxp/Makefile
index 7f608b0..607bd48 100644
--- a/drivers/clk/nxp/Makefile
+++ b/drivers/clk/nxp/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_ARCH_LPC18XX) += clk-lpc18xx-cgu.o
obj-$(CONFIG_ARCH_LPC18XX) += clk-lpc18xx-ccu.o
+obj-$(CONFIG_ARCH_LPC32XX) += clk-lpc32xx.o
diff --git a/drivers/clk/nxp/clk-lpc32xx.c b/drivers/clk/nxp/clk-lpc32xx.c
new file mode 100644
index 0000000..10dd0fd
--- /dev/null
+++ b/drivers/clk/nxp/clk-lpc32xx.c
@@ -0,0 +1,1569 @@
+/*
+ * Copyright 2015 Vladimir Zapolskiy <vz@mleia.com>
+ *
+ * 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
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.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 = {
+ .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_ADC + 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_PLL,
+ LPC32XX_CLK_HCLK_DIV_PERIPH,
+ LPC32XX_CLK_HCLK_DIV,
+ LPC32XX_CLK_HCLK,
+ LPC32XX_CLK_PERIPH,
+ 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",
+ 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, m, n, p, o = rate, i = *parent_rate, d = (u64)rate << 6;
+ 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 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 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 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 = clk_gate_enable,
+ .disable = clk_gate_disable,
+ .is_enabled = 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);
+}
+
+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, _flags) \
+[CLK_PREFIX(_idx)] = { \
+ .type = CLK_FIXED, \
+ { \
+ .f = { \
+ .fixed_rate = (_rate), \
+ .flags = (_flags), \
+ }, \
+ }, \
+}
+
+#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, 0),
+ 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 | CLK_DIVIDER_ALLOW_ZERO),
+ 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 | CLK_DIVIDER_ALLOW_ZERO),
+ 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 | CLK_DIVIDER_ALLOW_ZERO),
+ 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;
+
+ 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], fixed->flags, fixed->fixed_rate);
+ break;
+ }
+ default:
+ clk = ERR_PTR(-EINVAL);
+ }
+
+ return clk;
+}
+
+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");
+ 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));
+ return;
+ }
+
+ for (i = 0; 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);
+
+ /* For 13MHz osc valid output range of PLL is from 156MHz to 266.5MHz */
+ clk_set_rate(clk[LPC32XX_CLK_HCLK_PLL], 208000000);
+
+ /* 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 = 0; 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);
--
2.1.4