diff options
Diffstat (limited to 'drivers/clk/ti/clk-33xx.c')
| -rw-r--r-- | drivers/clk/ti/clk-33xx.c | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/drivers/clk/ti/clk-33xx.c b/drivers/clk/ti/clk-33xx.c new file mode 100644 index 000000000..12e0a2d19 --- /dev/null +++ b/drivers/clk/ti/clk-33xx.c @@ -0,0 +1,271 @@ +/* + * AM33XX Clock init + * + * Copyright (C) 2013 Texas Instruments, Inc + * Tero Kristo (t-kristo@ti.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clk/ti.h> +#include <dt-bindings/clock/am3.h> + +#include "clock.h" + +static const char * const am3_gpio1_dbclk_parents[] __initconst = { + "l4_per_cm:clk:0138:0", + NULL, +}; + +static const struct omap_clkctrl_bit_data am3_gpio2_bit_data[] __initconst = { + { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL }, + { 0 }, +}; + +static const struct omap_clkctrl_bit_data am3_gpio3_bit_data[] __initconst = { + { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL }, + { 0 }, +}; + +static const struct omap_clkctrl_bit_data am3_gpio4_bit_data[] __initconst = { + { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL }, + { 0 }, +}; + +static const struct omap_clkctrl_reg_data am3_l4_per_clkctrl_regs[] __initconst = { + { AM3_CPGMAC0_CLKCTRL, NULL, CLKF_SW_SUP, "cpsw_125mhz_gclk", "cpsw_125mhz_clkdm" }, + { AM3_LCDC_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_SET_RATE_PARENT, "lcd_gclk", "lcdc_clkdm" }, + { AM3_USB_OTG_HS_CLKCTRL, NULL, CLKF_SW_SUP, "usbotg_fck", "l3s_clkdm" }, + { AM3_TPTC0_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk", "l3_clkdm" }, + { AM3_EMIF_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_ddr_m2_div2_ck", "l3_clkdm" }, + { AM3_OCMCRAM_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk", "l3_clkdm" }, + { AM3_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "l3s_gclk", "l3s_clkdm" }, + { AM3_MCASP0_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp0_fck", "l3s_clkdm" }, + { AM3_UART6_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_MMC1_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" }, + { AM3_ELM_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_I2C3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_I2C2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_SPI0_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_SPI1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_L4_LS_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_MCASP1_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp1_fck", "l3s_clkdm" }, + { AM3_UART2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_UART3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_UART4_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_UART5_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, + { AM3_TIMER7_CLKCTRL, NULL, CLKF_SW_SUP, "timer7_fck" }, + { AM3_TIMER2_CLKCTRL, NULL, CLKF_SW_SUP, "timer2_fck" }, + { AM3_TIMER3_CLKCTRL, NULL, CLKF_SW_SUP, "timer3_fck" }, + { AM3_TIMER4_CLKCTRL, NULL, CLKF_SW_SUP, "timer4_fck" }, + { AM3_RNG_CLKCTRL, NULL, CLKF_SW_SUP, "rng_fck" }, + { AM3_AES_CLKCTRL, NULL, CLKF_SW_SUP, "aes0_fck", "l3_clkdm" }, + { AM3_SHAM_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk", "l3_clkdm" }, + { AM3_GPIO2_CLKCTRL, am3_gpio2_bit_data, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_GPIO3_CLKCTRL, am3_gpio3_bit_data, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_GPIO4_CLKCTRL, am3_gpio4_bit_data, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_TPCC_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk", "l3_clkdm" }, + { AM3_D_CAN0_CLKCTRL, NULL, CLKF_SW_SUP, "dcan0_fck" }, + { AM3_D_CAN1_CLKCTRL, NULL, CLKF_SW_SUP, "dcan1_fck" }, + { AM3_EPWMSS1_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_EPWMSS0_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_EPWMSS2_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_L3_INSTR_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk", "l3_clkdm" }, + { AM3_L3_MAIN_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk", "l3_clkdm" }, + { AM3_PRUSS_CLKCTRL, NULL, CLKF_SW_SUP, "pruss_ocp_gclk", "pruss_ocp_clkdm" }, + { AM3_TIMER5_CLKCTRL, NULL, CLKF_SW_SUP, "timer5_fck" }, + { AM3_TIMER6_CLKCTRL, NULL, CLKF_SW_SUP, "timer6_fck" }, + { AM3_MMC2_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" }, + { AM3_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk", "l3s_clkdm" }, + { AM3_TPTC1_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk", "l3_clkdm" }, + { AM3_TPTC2_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk", "l3_clkdm" }, + { AM3_SPINLOCK_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_MAILBOX_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_L4_HS_CLKCTRL, NULL, CLKF_SW_SUP, "l4hs_gclk", "l4hs_clkdm" }, + { AM3_OCPWP_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, + { AM3_CLKDIV32K_CLKCTRL, NULL, CLKF_SW_SUP, "clkdiv32k_ck", "clk_24mhz_clkdm" }, + { 0 }, +}; + +static const char * const am3_gpio0_dbclk_parents[] __initconst = { + "gpio0_dbclk_mux_ck", + NULL, +}; + +static const struct omap_clkctrl_bit_data am3_gpio1_bit_data[] __initconst = { + { 18, TI_CLK_GATE, am3_gpio0_dbclk_parents, NULL }, + { 0 }, +}; + +static const char * const am3_dbg_sysclk_ck_parents[] __initconst = { + "sys_clkin_ck", + NULL, +}; + +static const char * const am3_trace_pmd_clk_mux_ck_parents[] __initconst = { + "l4_wkup_cm:clk:0010:19", + "l4_wkup_cm:clk:0010:30", + NULL, +}; + +static const char * const am3_trace_clk_div_ck_parents[] __initconst = { + "l4_wkup_cm:clk:0010:20", + NULL, +}; + +static const struct omap_clkctrl_div_data am3_trace_clk_div_ck_data __initconst = { + .max_div = 64, + .flags = CLK_DIVIDER_POWER_OF_TWO, +}; + +static const char * const am3_stm_clk_div_ck_parents[] __initconst = { + "l4_wkup_cm:clk:0010:22", + NULL, +}; + +static const struct omap_clkctrl_div_data am3_stm_clk_div_ck_data __initconst = { + .max_div = 64, + .flags = CLK_DIVIDER_POWER_OF_TWO, +}; + +static const char * const am3_dbg_clka_ck_parents[] __initconst = { + "dpll_core_m4_ck", + NULL, +}; + +static const struct omap_clkctrl_bit_data am3_debugss_bit_data[] __initconst = { + { 19, TI_CLK_GATE, am3_dbg_sysclk_ck_parents, NULL }, + { 20, TI_CLK_MUX, am3_trace_pmd_clk_mux_ck_parents, NULL }, + { 22, TI_CLK_MUX, am3_trace_pmd_clk_mux_ck_parents, NULL }, + { 24, TI_CLK_DIVIDER, am3_trace_clk_div_ck_parents, &am3_trace_clk_div_ck_data }, + { 27, TI_CLK_DIVIDER, am3_stm_clk_div_ck_parents, &am3_stm_clk_div_ck_data }, + { 30, TI_CLK_GATE, am3_dbg_clka_ck_parents, NULL }, + { 0 }, +}; + +static const struct omap_clkctrl_reg_data am3_l4_wkup_clkctrl_regs[] __initconst = { + { AM3_CONTROL_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_core_m4_div2_ck" }, + { AM3_GPIO1_CLKCTRL, am3_gpio1_bit_data, CLKF_SW_SUP, "dpll_core_m4_div2_ck" }, + { AM3_L4_WKUP_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_core_m4_div2_ck" }, + { AM3_DEBUGSS_CLKCTRL, am3_debugss_bit_data, CLKF_SW_SUP, "l4_wkup_cm:clk:0010:24", "l3_aon_clkdm" }, + { AM3_WKUP_M3_CLKCTRL, NULL, CLKF_NO_IDLEST, "dpll_core_m4_div2_ck", "l4_wkup_aon_clkdm" }, + { AM3_UART1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_wkupdm_ck" }, + { AM3_I2C1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_wkupdm_ck" }, + { AM3_ADC_TSC_CLKCTRL, NULL, CLKF_SW_SUP, "adc_tsc_fck" }, + { AM3_SMARTREFLEX0_CLKCTRL, NULL, CLKF_SW_SUP, "smartreflex0_fck" }, + { AM3_TIMER1_CLKCTRL, NULL, CLKF_SW_SUP, "timer1_fck" }, + { AM3_SMARTREFLEX1_CLKCTRL, NULL, CLKF_SW_SUP, "smartreflex1_fck" }, + { AM3_WD_TIMER2_CLKCTRL, NULL, CLKF_SW_SUP, "wdt1_fck" }, + { 0 }, +}; + +static const struct omap_clkctrl_reg_data am3_mpu_clkctrl_regs[] __initconst = { + { AM3_MPU_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_mpu_m2_ck" }, + { 0 }, +}; + +static const struct omap_clkctrl_reg_data am3_l4_rtc_clkctrl_regs[] __initconst = { + { AM3_RTC_CLKCTRL, NULL, CLKF_SW_SUP, "clk_32768_ck" }, + { 0 }, +}; + +static const struct omap_clkctrl_reg_data am3_gfx_l3_clkctrl_regs[] __initconst = { + { AM3_GFX_CLKCTRL, NULL, CLKF_SW_SUP, "gfx_fck_div_ck" }, + { 0 }, +}; + +static const struct omap_clkctrl_reg_data am3_l4_cefuse_clkctrl_regs[] __initconst = { + { AM3_CEFUSE_CLKCTRL, NULL, CLKF_SW_SUP, "sys_clkin_ck" }, + { 0 }, +}; + +const struct omap_clkctrl_data am3_clkctrl_data[] __initconst = { + { 0x44e00014, am3_l4_per_clkctrl_regs }, + { 0x44e00404, am3_l4_wkup_clkctrl_regs }, + { 0x44e00604, am3_mpu_clkctrl_regs }, + { 0x44e00800, am3_l4_rtc_clkctrl_regs }, + { 0x44e00904, am3_gfx_l3_clkctrl_regs }, + { 0x44e00a20, am3_l4_cefuse_clkctrl_regs }, + { 0 }, +}; + +static struct ti_dt_clk am33xx_clks[] = { + DT_CLK(NULL, "timer_32k_ck", "l4_per_cm:0138:0"), + DT_CLK(NULL, "timer_sys_ck", "sys_clkin_ck"), + DT_CLK(NULL, "clkdiv32k_ick", "l4_per_cm:0138:0"), + DT_CLK(NULL, "dbg_clka_ck", "l4_wkup_cm:0010:30"), + DT_CLK(NULL, "dbg_sysclk_ck", "l4_wkup_cm:0010:19"), + DT_CLK(NULL, "gpio0_dbclk", "l4_wkup_cm:0004:18"), + DT_CLK(NULL, "gpio1_dbclk", "l4_per_cm:0098:18"), + DT_CLK(NULL, "gpio2_dbclk", "l4_per_cm:009c:18"), + DT_CLK(NULL, "gpio3_dbclk", "l4_per_cm:00a0:18"), + DT_CLK(NULL, "stm_clk_div_ck", "l4_wkup_cm:0010:27"), + DT_CLK(NULL, "stm_pmd_clock_mux_ck", "l4_wkup_cm:0010:22"), + DT_CLK(NULL, "trace_clk_div_ck", "l4_wkup_cm:0010:24"), + DT_CLK(NULL, "trace_pmd_clk_mux_ck", "l4_wkup_cm:0010:20"), + { .node_name = NULL }, +}; + +static const char *enable_init_clks[] = { + "dpll_ddr_m2_ck", + "dpll_mpu_m2_ck", + "l3_gclk", + "l4hs_gclk", + "l4fw_gclk", + "l4ls_gclk", + /* Required for external peripherals like, Audio codecs */ + "clkout2_ck", +}; + +int __init am33xx_dt_clk_init(void) +{ + struct clk *clk1, *clk2; + + ti_dt_clocks_register(am33xx_clks); + + omap2_clk_disable_autoidle_all(); + + ti_clk_add_aliases(); + + omap2_clk_enable_init_clocks(enable_init_clks, + ARRAY_SIZE(enable_init_clks)); + + /* TRM ERRATA: Timer 3 & 6 default parent (TCLKIN) may not be always + * physically present, in such a case HWMOD enabling of + * clock would be failure with default parent. And timer + * probe thinks clock is already enabled, this leads to + * crash upon accessing timer 3 & 6 registers in probe. + * Fix by setting parent of both these timers to master + * oscillator clock. + */ + + clk1 = clk_get_sys(NULL, "sys_clkin_ck"); + clk2 = clk_get_sys(NULL, "timer3_fck"); + clk_set_parent(clk2, clk1); + + clk2 = clk_get_sys(NULL, "timer6_fck"); + clk_set_parent(clk2, clk1); + /* + * The On-Chip 32K RC Osc clock is not an accurate clock-source as per + * the design/spec, so as a result, for example, timer which supposed + * to get expired @60Sec, but will expire somewhere ~@40Sec, which is + * not expected by any use-case, so change WDT1 clock source to PRCM + * 32KHz clock. + */ + clk1 = clk_get_sys(NULL, "wdt1_fck"); + clk2 = clk_get_sys(NULL, "clkdiv32k_ick"); + clk_set_parent(clk1, clk2); + + return 0; +} |