/* * arch/arm/mach-spear6xx/clock.c * * SPEAr6xx machines clock framework source file * * Copyright (C) 2009 ST Microelectronics * Viresh Kumar * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include #include #include #include #include /* root clks */ /* 32 KHz oscillator clock */ static struct clk osc_32k_clk = { .flags = ALWAYS_ENABLED, .rate = 32000, }; /* 30 MHz oscillator clock */ static struct clk osc_30m_clk = { .flags = ALWAYS_ENABLED, .rate = 30000000, }; /* clock derived from 32 KHz osc clk */ /* rtc clock */ static struct clk rtc_clk = { .pclk = &osc_32k_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = RTC_CLK_ENB, .recalc = &follow_parent, }; /* clock derived from 30 MHz osc clk */ /* pll masks structure */ static struct pll_clk_masks pll1_masks = { .mode_mask = PLL_MODE_MASK, .mode_shift = PLL_MODE_SHIFT, .norm_fdbk_m_mask = PLL_NORM_FDBK_M_MASK, .norm_fdbk_m_shift = PLL_NORM_FDBK_M_SHIFT, .dith_fdbk_m_mask = PLL_DITH_FDBK_M_MASK, .dith_fdbk_m_shift = PLL_DITH_FDBK_M_SHIFT, .div_p_mask = PLL_DIV_P_MASK, .div_p_shift = PLL_DIV_P_SHIFT, .div_n_mask = PLL_DIV_N_MASK, .div_n_shift = PLL_DIV_N_SHIFT, }; /* pll1 configuration structure */ static struct pll_clk_config pll1_config = { .mode_reg = PLL1_CTR, .cfg_reg = PLL1_FRQ, .masks = &pll1_masks, }; /* pll rate configuration table, in ascending order of rates */ struct pll_rate_tbl pll_rtbl[] = { {.mode = 0, .m = 0x85, .n = 0x0C, .p = 0x1}, /* 266 MHz */ {.mode = 0, .m = 0xA6, .n = 0x0C, .p = 0x1}, /* 332 MHz */ }; /* PLL1 clock */ static struct clk pll1_clk = { .flags = ENABLED_ON_INIT, .pclk = &osc_30m_clk, .en_reg = PLL1_CTR, .en_reg_bit = PLL_ENABLE, .calc_rate = &pll_calc_rate, .recalc = &pll_clk_recalc, .set_rate = &pll_clk_set_rate, .rate_config = {pll_rtbl, ARRAY_SIZE(pll_rtbl), 1}, .private_data = &pll1_config, }; /* PLL3 48 MHz clock */ static struct clk pll3_48m_clk = { .flags = ALWAYS_ENABLED, .pclk = &osc_30m_clk, .rate = 48000000, }; /* watch dog timer clock */ static struct clk wdt_clk = { .flags = ALWAYS_ENABLED, .pclk = &osc_30m_clk, .recalc = &follow_parent, }; /* clock derived from pll1 clk */ /* cpu clock */ static struct clk cpu_clk = { .flags = ALWAYS_ENABLED, .pclk = &pll1_clk, .recalc = &follow_parent, }; /* ahb masks structure */ static struct bus_clk_masks ahb_masks = { .mask = PLL_HCLK_RATIO_MASK, .shift = PLL_HCLK_RATIO_SHIFT, }; /* ahb configuration structure */ static struct bus_clk_config ahb_config = { .reg = CORE_CLK_CFG, .masks = &ahb_masks, }; /* ahb rate configuration table, in ascending order of rates */ struct bus_rate_tbl bus_rtbl[] = { {.div = 3}, /* == parent divided by 4 */ {.div = 2}, /* == parent divided by 3 */ {.div = 1}, /* == parent divided by 2 */ {.div = 0}, /* == parent divided by 1 */ }; /* ahb clock */ static struct clk ahb_clk = { .flags = ALWAYS_ENABLED, .pclk = &pll1_clk, .calc_rate = &bus_calc_rate, .recalc = &bus_clk_recalc, .set_rate = &bus_clk_set_rate, .rate_config = {bus_rtbl, ARRAY_SIZE(bus_rtbl), 2}, .private_data = &ahb_config, }; /* auxiliary synthesizers masks */ static struct aux_clk_masks aux_masks = { .eq_sel_mask = AUX_EQ_SEL_MASK, .eq_sel_shift = AUX_EQ_SEL_SHIFT, .eq1_mask = AUX_EQ1_SEL, .eq2_mask = AUX_EQ2_SEL, .xscale_sel_mask = AUX_XSCALE_MASK, .xscale_sel_shift = AUX_XSCALE_SHIFT, .yscale_sel_mask = AUX_YSCALE_MASK, .yscale_sel_shift = AUX_YSCALE_SHIFT, }; /* uart configurations */ static struct aux_clk_config uart_synth_config = { .synth_reg = UART_CLK_SYNT, .masks = &aux_masks, }; /* aux rate configuration table, in ascending order of rates */ struct aux_rate_tbl aux_rtbl[] = { /* For PLL1 = 332 MHz */ {.xscale = 1, .yscale = 8, .eq = 1}, /* 41.5 MHz */ {.xscale = 1, .yscale = 4, .eq = 1}, /* 83 MHz */ {.xscale = 1, .yscale = 2, .eq = 1}, /* 166 MHz */ }; /* uart synth clock */ static struct clk uart_synth_clk = { .en_reg = UART_CLK_SYNT, .en_reg_bit = AUX_SYNT_ENB, .pclk = &pll1_clk, .calc_rate = &aux_calc_rate, .recalc = &aux_clk_recalc, .set_rate = &aux_clk_set_rate, .rate_config = {aux_rtbl, ARRAY_SIZE(aux_rtbl), 2}, .private_data = &uart_synth_config, }; /* uart parents */ static struct pclk_info uart_pclk_info[] = { { .pclk = &uart_synth_clk, .pclk_val = AUX_CLK_PLL1_VAL, }, { .pclk = &pll3_48m_clk, .pclk_val = AUX_CLK_PLL3_VAL, }, }; /* uart parent select structure */ static struct pclk_sel uart_pclk_sel = { .pclk_info = uart_pclk_info, .pclk_count = ARRAY_SIZE(uart_pclk_info), .pclk_sel_reg = PERIP_CLK_CFG, .pclk_sel_mask = UART_CLK_MASK, }; /* uart0 clock */ static struct clk uart0_clk = { .en_reg = PERIP1_CLK_ENB, .en_reg_bit = UART0_CLK_ENB, .pclk_sel = &uart_pclk_sel, .pclk_sel_shift = UART_CLK_SHIFT, .recalc = &follow_parent, }; /* uart1 clock */ static struct clk uart1_clk = { .en_reg = PERIP1_CLK_ENB, .en_reg_bit = UART1_CLK_ENB, .pclk_sel = &uart_pclk_sel, .pclk_sel_shift = UART_CLK_SHIFT, .recalc = &follow_parent, }; /* firda configurations */ static struct aux_clk_config firda_synth_config = { .synth_reg = FIRDA_CLK_SYNT, .masks = &aux_masks, }; /* firda synth clock */ static struct clk firda_synth_clk = { .en_reg = FIRDA_CLK_SYNT, .en_reg_bit = AUX_SYNT_ENB, .pclk = &pll1_clk, .calc_rate = &aux_calc_rate, .recalc = &aux_clk_recalc, .set_rate = &aux_clk_set_rate, .rate_config = {aux_rtbl, ARRAY_SIZE(aux_rtbl), 2}, .private_data = &firda_synth_config, }; /* firda parents */ static struct pclk_info firda_pclk_info[] = { { .pclk = &firda_synth_clk, .pclk_val = AUX_CLK_PLL1_VAL, }, { .pclk = &pll3_48m_clk, .pclk_val = AUX_CLK_PLL3_VAL, }, }; /* firda parent select structure */ static struct pclk_sel firda_pclk_sel = { .pclk_info = firda_pclk_info, .pclk_count = ARRAY_SIZE(firda_pclk_info), .pclk_sel_reg = PERIP_CLK_CFG, .pclk_sel_mask = FIRDA_CLK_MASK, }; /* firda clock */ static struct clk firda_clk = { .en_reg = PERIP1_CLK_ENB, .en_reg_bit = FIRDA_CLK_ENB, .pclk_sel = &firda_pclk_sel, .pclk_sel_shift = FIRDA_CLK_SHIFT, .recalc = &follow_parent, }; /* clcd configurations */ static struct aux_clk_config clcd_synth_config = { .synth_reg = CLCD_CLK_SYNT, .masks = &aux_masks, }; /* firda synth clock */ static struct clk clcd_synth_clk = { .en_reg = CLCD_CLK_SYNT, .en_reg_bit = AUX_SYNT_ENB, .pclk = &pll1_clk, .calc_rate = &aux_calc_rate, .recalc = &aux_clk_recalc, .set_rate = &aux_clk_set_rate, .rate_config = {aux_rtbl, ARRAY_SIZE(aux_rtbl), 2}, .private_data = &clcd_synth_config, }; /* clcd parents */ static struct pclk_info clcd_pclk_info[] = { { .pclk = &clcd_synth_clk, .pclk_val = AUX_CLK_PLL1_VAL, }, { .pclk = &pll3_48m_clk, .pclk_val = AUX_CLK_PLL3_VAL, }, }; /* clcd parent select structure */ static struct pclk_sel clcd_pclk_sel = { .pclk_info = clcd_pclk_info, .pclk_count = ARRAY_SIZE(clcd_pclk_info), .pclk_sel_reg = PERIP_CLK_CFG, .pclk_sel_mask = CLCD_CLK_MASK, }; /* clcd clock */ static struct clk clcd_clk = { .en_reg = PERIP1_CLK_ENB, .en_reg_bit = CLCD_CLK_ENB, .pclk_sel = &clcd_pclk_sel, .pclk_sel_shift = CLCD_CLK_SHIFT, .recalc = &follow_parent, }; /* gpt synthesizer masks */ static struct gpt_clk_masks gpt_masks = { .mscale_sel_mask = GPT_MSCALE_MASK, .mscale_sel_shift = GPT_MSCALE_SHIFT, .nscale_sel_mask = GPT_NSCALE_MASK, .nscale_sel_shift = GPT_NSCALE_SHIFT, }; /* gpt rate configuration table, in ascending order of rates */ struct gpt_rate_tbl gpt_rtbl[] = { /* For pll1 = 332 MHz */ {.mscale = 4, .nscale = 0}, /* 41.5 MHz */ {.mscale = 2, .nscale = 0}, /* 55.3 MHz */ {.mscale = 1, .nscale = 0}, /* 83 MHz */ }; /* gpt0 synth clk config*/ static struct gpt_clk_config gpt0_synth_config = { .synth_reg = PRSC1_CLK_CFG, .masks = &gpt_masks, }; /* gpt synth clock */ static struct clk gpt0_synth_clk = { .flags = ALWAYS_ENABLED, .pclk = &pll1_clk, .calc_rate = &gpt_calc_rate, .recalc = &gpt_clk_recalc, .set_rate = &gpt_clk_set_rate, .rate_config = {gpt_rtbl, ARRAY_SIZE(gpt_rtbl), 2}, .private_data = &gpt0_synth_config, }; /* gpt parents */ static struct pclk_info gpt0_pclk_info[] = { { .pclk = &gpt0_synth_clk, .pclk_val = AUX_CLK_PLL1_VAL, }, { .pclk = &pll3_48m_clk, .pclk_val = AUX_CLK_PLL3_VAL, }, }; /* gpt parent select structure */ static struct pclk_sel gpt0_pclk_sel = { .pclk_info = gpt0_pclk_info, .pclk_count = ARRAY_SIZE(gpt0_pclk_info), .pclk_sel_reg = PERIP_CLK_CFG, .pclk_sel_mask = GPT_CLK_MASK, }; /* gpt0 ARM1 subsystem timer clock */ static struct clk gpt0_clk = { .flags = ALWAYS_ENABLED, .pclk_sel = &gpt0_pclk_sel, .pclk_sel_shift = GPT0_CLK_SHIFT, .recalc = &follow_parent, }; /* Note: gpt0 and gpt1 share same parent clocks */ /* gpt parent select structure */ static struct pclk_sel gpt1_pclk_sel = { .pclk_info = gpt0_pclk_info, .pclk_count = ARRAY_SIZE(gpt0_pclk_info), .pclk_sel_reg = PERIP_CLK_CFG, .pclk_sel_mask = GPT_CLK_MASK, }; /* gpt1 timer clock */ static struct clk gpt1_clk = { .flags = ALWAYS_ENABLED, .pclk_sel = &gpt1_pclk_sel, .pclk_sel_shift = GPT1_CLK_SHIFT, .recalc = &follow_parent, }; /* gpt2 synth clk config*/ static struct gpt_clk_config gpt2_synth_config = { .synth_reg = PRSC2_CLK_CFG, .masks = &gpt_masks, }; /* gpt synth clock */ static struct clk gpt2_synth_clk = { .flags = ALWAYS_ENABLED, .pclk = &pll1_clk, .calc_rate = &gpt_calc_rate, .recalc = &gpt_clk_recalc, .set_rate = &gpt_clk_set_rate, .rate_config = {gpt_rtbl, ARRAY_SIZE(gpt_rtbl), 2}, .private_data = &gpt2_synth_config, }; /* gpt parents */ static struct pclk_info gpt2_pclk_info[] = { { .pclk = &gpt2_synth_clk, .pclk_val = AUX_CLK_PLL1_VAL, }, { .pclk = &pll3_48m_clk, .pclk_val = AUX_CLK_PLL3_VAL, }, }; /* gpt parent select structure */ static struct pclk_sel gpt2_pclk_sel = { .pclk_info = gpt2_pclk_info, .pclk_count = ARRAY_SIZE(gpt2_pclk_info), .pclk_sel_reg = PERIP_CLK_CFG, .pclk_sel_mask = GPT_CLK_MASK, }; /* gpt2 timer clock */ static struct clk gpt2_clk = { .flags = ALWAYS_ENABLED, .pclk_sel = &gpt2_pclk_sel, .pclk_sel_shift = GPT2_CLK_SHIFT, .recalc = &follow_parent, }; /* gpt3 synth clk config*/ static struct gpt_clk_config gpt3_synth_config = { .synth_reg = PRSC3_CLK_CFG, .masks = &gpt_masks, }; /* gpt synth clock */ static struct clk gpt3_synth_clk = { .flags = ALWAYS_ENABLED, .pclk = &pll1_clk, .calc_rate = &gpt_calc_rate, .recalc = &gpt_clk_recalc, .set_rate = &gpt_clk_set_rate, .rate_config = {gpt_rtbl, ARRAY_SIZE(gpt_rtbl), 2}, .private_data = &gpt3_synth_config, }; /* gpt parents */ static struct pclk_info gpt3_pclk_info[] = { { .pclk = &gpt3_synth_clk, .pclk_val = AUX_CLK_PLL1_VAL, }, { .pclk = &pll3_48m_clk, .pclk_val = AUX_CLK_PLL3_VAL, }, }; /* gpt parent select structure */ static struct pclk_sel gpt3_pclk_sel = { .pclk_info = gpt3_pclk_info, .pclk_count = ARRAY_SIZE(gpt3_pclk_info), .pclk_sel_reg = PERIP_CLK_CFG, .pclk_sel_mask = GPT_CLK_MASK, }; /* gpt3 timer clock */ static struct clk gpt3_clk = { .flags = ALWAYS_ENABLED, .pclk_sel = &gpt3_pclk_sel, .pclk_sel_shift = GPT3_CLK_SHIFT, .recalc = &follow_parent, }; /* clock derived from pll3 clk */ /* usbh0 clock */ static struct clk usbh0_clk = { .pclk = &pll3_48m_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = USBH0_CLK_ENB, .recalc = &follow_parent, }; /* usbh1 clock */ static struct clk usbh1_clk = { .pclk = &pll3_48m_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = USBH1_CLK_ENB, .recalc = &follow_parent, }; /* usbd clock */ static struct clk usbd_clk = { .pclk = &pll3_48m_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = USBD_CLK_ENB, .recalc = &follow_parent, }; /* clock derived from ahb clk */ /* apb masks structure */ static struct bus_clk_masks apb_masks = { .mask = HCLK_PCLK_RATIO_MASK, .shift = HCLK_PCLK_RATIO_SHIFT, }; /* apb configuration structure */ static struct bus_clk_config apb_config = { .reg = CORE_CLK_CFG, .masks = &apb_masks, }; /* apb clock */ static struct clk apb_clk = { .flags = ALWAYS_ENABLED, .pclk = &ahb_clk, .calc_rate = &bus_calc_rate, .recalc = &bus_clk_recalc, .set_rate = &bus_clk_set_rate, .rate_config = {bus_rtbl, ARRAY_SIZE(bus_rtbl), 2}, .private_data = &apb_config, }; /* i2c clock */ static struct clk i2c_clk = { .pclk = &ahb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = I2C_CLK_ENB, .recalc = &follow_parent, }; /* dma clock */ static struct clk dma_clk = { .pclk = &ahb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = DMA_CLK_ENB, .recalc = &follow_parent, }; /* jpeg clock */ static struct clk jpeg_clk = { .pclk = &ahb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = JPEG_CLK_ENB, .recalc = &follow_parent, }; /* gmac clock */ static struct clk gmac_clk = { .pclk = &ahb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = GMAC_CLK_ENB, .recalc = &follow_parent, }; /* smi clock */ static struct clk smi_clk = { .pclk = &ahb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = SMI_CLK_ENB, .recalc = &follow_parent, }; /* fsmc clock */ static struct clk fsmc_clk = { .pclk = &ahb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = FSMC_CLK_ENB, .recalc = &follow_parent, }; /* clock derived from apb clk */ /* adc clock */ static struct clk adc_clk = { .pclk = &apb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = ADC_CLK_ENB, .recalc = &follow_parent, }; /* ssp0 clock */ static struct clk ssp0_clk = { .pclk = &apb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = SSP0_CLK_ENB, .recalc = &follow_parent, }; /* ssp1 clock */ static struct clk ssp1_clk = { .pclk = &apb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = SSP1_CLK_ENB, .recalc = &follow_parent, }; /* ssp2 clock */ static struct clk ssp2_clk = { .pclk = &apb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = SSP2_CLK_ENB, .recalc = &follow_parent, }; /* gpio0 ARM subsystem clock */ static struct clk gpio0_clk = { .flags = ALWAYS_ENABLED, .pclk = &apb_clk, .recalc = &follow_parent, }; /* gpio1 clock */ static struct clk gpio1_clk = { .pclk = &apb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = GPIO1_CLK_ENB, .recalc = &follow_parent, }; /* gpio2 clock */ static struct clk gpio2_clk = { .pclk = &apb_clk, .en_reg = PERIP1_CLK_ENB, .en_reg_bit = GPIO2_CLK_ENB, .recalc = &follow_parent, }; static struct clk dummy_apb_pclk; /* array of all spear 6xx clock lookups */ static struct clk_lookup spear_clk_lookups[] = { CLKDEV_INIT(NULL, "apb_pclk", &dummy_apb_pclk), /* root clks */ CLKDEV_INIT(NULL, "osc_32k_clk", &osc_32k_clk), CLKDEV_INIT(NULL, "osc_30m_clk", &osc_30m_clk), /* clock derived from 32 KHz os clk */ CLKDEV_INIT("rtc-spear", NULL, &rtc_clk), /* clock derived from 30 MHz os clk */ CLKDEV_INIT(NULL, "pll1_clk", &pll1_clk), CLKDEV_INIT(NULL, "pll3_48m_clk", &pll3_48m_clk), CLKDEV_INIT("wdt", NULL, &wdt_clk), /* clock derived from pll1 clk */ CLKDEV_INIT(NULL, "cpu_clk", &cpu_clk), CLKDEV_INIT(NULL, "ahb_clk", &ahb_clk), CLKDEV_INIT(NULL, "uart_synth_clk", &uart_synth_clk), CLKDEV_INIT(NULL, "firda_synth_clk", &firda_synth_clk), CLKDEV_INIT(NULL, "clcd_synth_clk", &clcd_synth_clk), CLKDEV_INIT(NULL, "gpt0_synth_clk", &gpt0_synth_clk), CLKDEV_INIT(NULL, "gpt2_synth_clk", &gpt2_synth_clk), CLKDEV_INIT(NULL, "gpt3_synth_clk", &gpt3_synth_clk), CLKDEV_INIT("d0000000.serial", NULL, &uart0_clk), CLKDEV_INIT("d0080000.serial", NULL, &uart1_clk), CLKDEV_INIT("firda", NULL, &firda_clk), CLKDEV_INIT("clcd", NULL, &clcd_clk), CLKDEV_INIT("gpt0", NULL, &gpt0_clk), CLKDEV_INIT("gpt1", NULL, &gpt1_clk), CLKDEV_INIT("gpt2", NULL, &gpt2_clk), CLKDEV_INIT("gpt3", NULL, &gpt3_clk), /* clock derived from pll3 clk */ CLKDEV_INIT("designware_udc", NULL, &usbd_clk), CLKDEV_INIT(NULL, "usbh.0_clk", &usbh0_clk), CLKDEV_INIT(NULL, "usbh.1_clk", &usbh1_clk), /* clock derived from ahb clk */ CLKDEV_INIT(NULL, "apb_clk", &apb_clk), CLKDEV_INIT("d0200000.i2c", NULL, &i2c_clk), CLKDEV_INIT("fc400000.dma", NULL, &dma_clk), CLKDEV_INIT("jpeg", NULL, &jpeg_clk), CLKDEV_INIT("gmac", NULL, &gmac_clk), CLKDEV_INIT("fc000000.flash", NULL, &smi_clk), CLKDEV_INIT("d1800000.flash", NULL, &fsmc_clk), /* clock derived from apb clk */ CLKDEV_INIT("adc", NULL, &adc_clk), CLKDEV_INIT("ssp-pl022.0", NULL, &ssp0_clk), CLKDEV_INIT("ssp-pl022.1", NULL, &ssp1_clk), CLKDEV_INIT("ssp-pl022.2", NULL, &ssp2_clk), CLKDEV_INIT("f0100000.gpio", NULL, &gpio0_clk), CLKDEV_INIT("fc980000.gpio", NULL, &gpio1_clk), CLKDEV_INIT("d8100000.gpio", NULL, &gpio2_clk), }; void __init spear6xx_clk_init(void) { int i; for (i = 0; i < ARRAY_SIZE(spear_clk_lookups); i++) clk_register(&spear_clk_lookups[i]); clk_init(); }