X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fu-boot%2Farch%2Favr32%2Finclude%2Fasm%2Farch-at32ap700x%2Fclk.h;fp=qemu%2Froms%2Fu-boot%2Farch%2Favr32%2Finclude%2Fasm%2Farch-at32ap700x%2Fclk.h;h=0721899fde5ef4605552e653d5cb6f12d82d9b64;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git diff --git a/qemu/roms/u-boot/arch/avr32/include/asm/arch-at32ap700x/clk.h b/qemu/roms/u-boot/arch/avr32/include/asm/arch-at32ap700x/clk.h new file mode 100644 index 000000000..0721899fd --- /dev/null +++ b/qemu/roms/u-boot/arch/avr32/include/asm/arch-at32ap700x/clk.h @@ -0,0 +1,175 @@ +/* + * Copyright (C) 2006 Atmel Corporation + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef __ASM_AVR32_ARCH_CLK_H__ +#define __ASM_AVR32_ARCH_CLK_H__ + +#include +#include + +#ifdef CONFIG_PLL +#define PLL0_RATE ((CONFIG_SYS_OSC0_HZ / CONFIG_SYS_PLL0_DIV) \ + * CONFIG_SYS_PLL0_MUL) +#define MAIN_CLK_RATE PLL0_RATE +#else +#define MAIN_CLK_RATE (CONFIG_SYS_OSC0_HZ) +#endif + +static inline unsigned long get_cpu_clk_rate(void) +{ + return MAIN_CLK_RATE >> CONFIG_SYS_CLKDIV_CPU; +} +static inline unsigned long get_hsb_clk_rate(void) +{ + return MAIN_CLK_RATE >> CONFIG_SYS_CLKDIV_HSB; +} +static inline unsigned long get_pba_clk_rate(void) +{ + return MAIN_CLK_RATE >> CONFIG_SYS_CLKDIV_PBA; +} +static inline unsigned long get_pbb_clk_rate(void) +{ + return MAIN_CLK_RATE >> CONFIG_SYS_CLKDIV_PBB; +} + +/* Accessors for specific devices. More will be added as needed. */ +static inline unsigned long get_sdram_clk_rate(void) +{ + return get_hsb_clk_rate(); +} +#ifdef AT32AP700x_CHIP_HAS_USART +static inline unsigned long get_usart_clk_rate(unsigned int dev_id) +{ + return get_pba_clk_rate(); +} +#endif +#ifdef AT32AP700x_CHIP_HAS_MACB +static inline unsigned long get_macb_pclk_rate(unsigned int dev_id) +{ + return get_pbb_clk_rate(); +} +static inline unsigned long get_macb_hclk_rate(unsigned int dev_id) +{ + return get_hsb_clk_rate(); +} +#endif +#ifdef AT32AP700x_CHIP_HAS_MMCI +static inline unsigned long get_mci_clk_rate(void) +{ + return get_pbb_clk_rate(); +} +#endif +#ifdef AT32AP700x_CHIP_HAS_SPI +static inline unsigned long get_spi_clk_rate(unsigned int dev_id) +{ + return get_pba_clk_rate(); +} +#endif +#ifdef AT32AP700x_CHIP_HAS_LCDC +static inline unsigned long get_lcdc_clk_rate(unsigned int dev_id) +{ + return get_hsb_clk_rate(); +} +#endif + +extern void clk_init(void); + +/* Board code may need the SDRAM base clock as a compile-time constant */ +#define SDRAMC_BUS_HZ (MAIN_CLK_RATE >> CONFIG_SYS_CLKDIV_HSB) + +/* Generic clock control */ +enum gclk_parent { + GCLK_PARENT_OSC0 = 0, + GCLK_PARENT_OSC1 = 1, + GCLK_PARENT_PLL0 = 2, + GCLK_PARENT_PLL1 = 3, +}; + +/* Some generic clocks have specific roles */ +#define GCLK_DAC_SAMPLE_CLK 6 +#define GCLK_LCDC_PIXCLK 7 + +extern unsigned long __gclk_set_rate(unsigned int id, enum gclk_parent parent, + unsigned long rate, unsigned long parent_rate); + +/** + * gclk_set_rate - configure and enable a generic clock + * @id: Which GCLK[id] to enable + * @parent: Parent clock feeding the GCLK + * @rate: Target rate of the GCLK in Hz + * + * Returns the actual GCLK rate in Hz, after rounding to the nearest + * supported rate. + * + * All three parameters are usually constant, hence the inline. + */ +static inline unsigned long gclk_set_rate(unsigned int id, + enum gclk_parent parent, unsigned long rate) +{ + unsigned long parent_rate; + + if (id > 7) + return 0; + + switch (parent) { + case GCLK_PARENT_OSC0: + parent_rate = CONFIG_SYS_OSC0_HZ; + break; +#ifdef CONFIG_SYS_OSC1_HZ + case GCLK_PARENT_OSC1: + parent_rate = CONFIG_SYS_OSC1_HZ; + break; +#endif +#ifdef PLL0_RATE + case GCLK_PARENT_PLL0: + parent_rate = PLL0_RATE; + break; +#endif +#ifdef PLL1_RATE + case GCLK_PARENT_PLL1: + parent_rate = PLL1_RATE; + break; +#endif + default: + parent_rate = 0; + break; + } + + return __gclk_set_rate(id, parent, rate, parent_rate); +} + +/** + * gclk_enable_output - enable output on a GCLK pin + * @id: Which GCLK[id] pin to enable + * @drive_strength: Drive strength of external GCLK pin, if applicable + */ +static inline void gclk_enable_output(unsigned int id, + unsigned long drive_strength) +{ + switch (id) { + case 0: + portmux_select_peripheral(PORTMUX_PORT_A, 1 << 30, + PORTMUX_FUNC_A, drive_strength); + break; + case 1: + portmux_select_peripheral(PORTMUX_PORT_A, 1 << 31, + PORTMUX_FUNC_A, drive_strength); + break; + case 2: + portmux_select_peripheral(PORTMUX_PORT_B, 1 << 19, + PORTMUX_FUNC_A, drive_strength); + break; + case 3: + portmux_select_peripheral(PORTMUX_PORT_B, 1 << 29, + PORTMUX_FUNC_A, drive_strength); + break; + case 4: + portmux_select_peripheral(PORTMUX_PORT_B, 1 << 30, + PORTMUX_FUNC_A, drive_strength); + break; + } +} + +#endif /* __ASM_AVR32_ARCH_CLK_H__ */