diff options
author | Tero Kristo <t-kristo@ti.com> | 2013-07-19 11:36:01 +0300 |
---|---|---|
committer | Mike Turquette <mturquette@linaro.org> | 2014-01-17 12:35:41 -0800 |
commit | 45622e2162b6d5907006f4595f2ac862afe1dfb5 (patch) | |
tree | 93b492bc3c97404b7cd4f798440cf088e72425e9 /drivers | |
parent | 251a449dd3290d5af35da1113e155a37bf8b3ece (diff) |
CLK: TI: add am33xx clock init file
clk-33xx.c now contains the clock init functionality for am33xx, including
DT clock registration and adding of static clkdev entries.
This patch also moves the omap2_clk_enable_init_clocks declaration to
the driver include, as this is needed by the am33xx clock init code.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clk/ti/Makefile | 1 | ||||
-rw-r--r-- | drivers/clk/ti/clk-33xx.c | 161 |
2 files changed, 162 insertions, 0 deletions
diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile index cd445cafcdd9..51b00f80cc14 100644 --- a/drivers/clk/ti/Makefile +++ b/drivers/clk/ti/Makefile @@ -2,6 +2,7 @@ ifneq ($(CONFIG_OF),) obj-y += clk.o autoidle.o clockdomain.o clk-common = dpll.o composite.o divider.o gate.o \ fixed-factor.o mux.o apll.o +obj-$(CONFIG_SOC_AM33XX) += $(clk-common) clk-33xx.o obj-$(CONFIG_ARCH_OMAP4) += $(clk-common) clk-44xx.o obj-$(CONFIG_SOC_OMAP5) += $(clk-common) clk-54xx.o obj-$(CONFIG_SOC_DRA7XX) += $(clk-common) clk-7xx.o diff --git a/drivers/clk/ti/clk-33xx.c b/drivers/clk/ti/clk-33xx.c new file mode 100644 index 000000000000..776ee4594bd4 --- /dev/null +++ b/drivers/clk/ti/clk-33xx.c @@ -0,0 +1,161 @@ +/* + * 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-provider.h> +#include <linux/clk/ti.h> + +static struct ti_dt_clk am33xx_clks[] = { + DT_CLK(NULL, "clk_32768_ck", "clk_32768_ck"), + DT_CLK(NULL, "clk_rc32k_ck", "clk_rc32k_ck"), + DT_CLK(NULL, "virt_19200000_ck", "virt_19200000_ck"), + DT_CLK(NULL, "virt_24000000_ck", "virt_24000000_ck"), + DT_CLK(NULL, "virt_25000000_ck", "virt_25000000_ck"), + DT_CLK(NULL, "virt_26000000_ck", "virt_26000000_ck"), + DT_CLK(NULL, "sys_clkin_ck", "sys_clkin_ck"), + DT_CLK(NULL, "tclkin_ck", "tclkin_ck"), + DT_CLK(NULL, "dpll_core_ck", "dpll_core_ck"), + DT_CLK(NULL, "dpll_core_x2_ck", "dpll_core_x2_ck"), + DT_CLK(NULL, "dpll_core_m4_ck", "dpll_core_m4_ck"), + DT_CLK(NULL, "dpll_core_m5_ck", "dpll_core_m5_ck"), + DT_CLK(NULL, "dpll_core_m6_ck", "dpll_core_m6_ck"), + DT_CLK(NULL, "dpll_mpu_ck", "dpll_mpu_ck"), + DT_CLK("cpu0", NULL, "dpll_mpu_ck"), + DT_CLK(NULL, "dpll_mpu_m2_ck", "dpll_mpu_m2_ck"), + DT_CLK(NULL, "dpll_ddr_ck", "dpll_ddr_ck"), + DT_CLK(NULL, "dpll_ddr_m2_ck", "dpll_ddr_m2_ck"), + DT_CLK(NULL, "dpll_ddr_m2_div2_ck", "dpll_ddr_m2_div2_ck"), + DT_CLK(NULL, "dpll_disp_ck", "dpll_disp_ck"), + DT_CLK(NULL, "dpll_disp_m2_ck", "dpll_disp_m2_ck"), + DT_CLK(NULL, "dpll_per_ck", "dpll_per_ck"), + DT_CLK(NULL, "dpll_per_m2_ck", "dpll_per_m2_ck"), + DT_CLK(NULL, "dpll_per_m2_div4_wkupdm_ck", "dpll_per_m2_div4_wkupdm_ck"), + DT_CLK(NULL, "dpll_per_m2_div4_ck", "dpll_per_m2_div4_ck"), + DT_CLK(NULL, "adc_tsc_fck", "adc_tsc_fck"), + DT_CLK(NULL, "cefuse_fck", "cefuse_fck"), + DT_CLK(NULL, "clkdiv32k_ck", "clkdiv32k_ck"), + DT_CLK(NULL, "clkdiv32k_ick", "clkdiv32k_ick"), + DT_CLK(NULL, "dcan0_fck", "dcan0_fck"), + DT_CLK("481cc000.d_can", NULL, "dcan0_fck"), + DT_CLK(NULL, "dcan1_fck", "dcan1_fck"), + DT_CLK("481d0000.d_can", NULL, "dcan1_fck"), + DT_CLK(NULL, "pruss_ocp_gclk", "pruss_ocp_gclk"), + DT_CLK(NULL, "mcasp0_fck", "mcasp0_fck"), + DT_CLK(NULL, "mcasp1_fck", "mcasp1_fck"), + DT_CLK(NULL, "mmu_fck", "mmu_fck"), + DT_CLK(NULL, "smartreflex0_fck", "smartreflex0_fck"), + DT_CLK(NULL, "smartreflex1_fck", "smartreflex1_fck"), + DT_CLK(NULL, "sha0_fck", "sha0_fck"), + DT_CLK(NULL, "aes0_fck", "aes0_fck"), + DT_CLK(NULL, "rng_fck", "rng_fck"), + DT_CLK(NULL, "timer1_fck", "timer1_fck"), + DT_CLK(NULL, "timer2_fck", "timer2_fck"), + DT_CLK(NULL, "timer3_fck", "timer3_fck"), + DT_CLK(NULL, "timer4_fck", "timer4_fck"), + DT_CLK(NULL, "timer5_fck", "timer5_fck"), + DT_CLK(NULL, "timer6_fck", "timer6_fck"), + DT_CLK(NULL, "timer7_fck", "timer7_fck"), + DT_CLK(NULL, "usbotg_fck", "usbotg_fck"), + DT_CLK(NULL, "ieee5000_fck", "ieee5000_fck"), + DT_CLK(NULL, "wdt1_fck", "wdt1_fck"), + DT_CLK(NULL, "l4_rtc_gclk", "l4_rtc_gclk"), + DT_CLK(NULL, "l3_gclk", "l3_gclk"), + DT_CLK(NULL, "dpll_core_m4_div2_ck", "dpll_core_m4_div2_ck"), + DT_CLK(NULL, "l4hs_gclk", "l4hs_gclk"), + DT_CLK(NULL, "l3s_gclk", "l3s_gclk"), + DT_CLK(NULL, "l4fw_gclk", "l4fw_gclk"), + DT_CLK(NULL, "l4ls_gclk", "l4ls_gclk"), + DT_CLK(NULL, "clk_24mhz", "clk_24mhz"), + DT_CLK(NULL, "sysclk_div_ck", "sysclk_div_ck"), + DT_CLK(NULL, "cpsw_125mhz_gclk", "cpsw_125mhz_gclk"), + DT_CLK(NULL, "cpsw_cpts_rft_clk", "cpsw_cpts_rft_clk"), + DT_CLK(NULL, "gpio0_dbclk_mux_ck", "gpio0_dbclk_mux_ck"), + DT_CLK(NULL, "gpio0_dbclk", "gpio0_dbclk"), + DT_CLK(NULL, "gpio1_dbclk", "gpio1_dbclk"), + DT_CLK(NULL, "gpio2_dbclk", "gpio2_dbclk"), + DT_CLK(NULL, "gpio3_dbclk", "gpio3_dbclk"), + DT_CLK(NULL, "lcd_gclk", "lcd_gclk"), + DT_CLK(NULL, "mmc_clk", "mmc_clk"), + DT_CLK(NULL, "gfx_fclk_clksel_ck", "gfx_fclk_clksel_ck"), + DT_CLK(NULL, "gfx_fck_div_ck", "gfx_fck_div_ck"), + DT_CLK(NULL, "sysclkout_pre_ck", "sysclkout_pre_ck"), + DT_CLK(NULL, "clkout2_div_ck", "clkout2_div_ck"), + DT_CLK(NULL, "timer_32k_ck", "clkdiv32k_ick"), + DT_CLK(NULL, "timer_sys_ck", "sys_clkin_ck"), + DT_CLK(NULL, "dbg_sysclk_ck", "dbg_sysclk_ck"), + DT_CLK(NULL, "dbg_clka_ck", "dbg_clka_ck"), + DT_CLK(NULL, "stm_pmd_clock_mux_ck", "stm_pmd_clock_mux_ck"), + DT_CLK(NULL, "trace_pmd_clk_mux_ck", "trace_pmd_clk_mux_ck"), + DT_CLK(NULL, "stm_clk_div_ck", "stm_clk_div_ck"), + DT_CLK(NULL, "trace_clk_div_ck", "trace_clk_div_ck"), + DT_CLK(NULL, "clkout2_ck", "clkout2_ck"), + DT_CLK("48300200.ehrpwm", "tbclk", "ehrpwm0_tbclk"), + DT_CLK("48302200.ehrpwm", "tbclk", "ehrpwm1_tbclk"), + DT_CLK("48304200.ehrpwm", "tbclk", "ehrpwm2_tbclk"), + { .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(); + + 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; +} |