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alistair23-linux/drivers/clk/ti/clk-33xx.c
Franklin S Cooper Jr 22a15e6ffa clk: ti: am335x/am4372: Add tbclk to pwm node 
Add tblck to the pwm nodes. This insures that the ehrpwm driver has access
to the time-based clk.

Do not remove similar entries for ehrpwm node. Later patches will switch
from using ehrpwm node name to pwm. But to maintain ABI compatibility we
shouldn't remove the old entries.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2016-06-10 03:25:04 -07:00

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/*
* 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 "clock.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(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"),
DT_CLK("48300200.pwm", "tbclk", "ehrpwm0_tbclk"),
DT_CLK("48302200.pwm", "tbclk", "ehrpwm1_tbclk"),
DT_CLK("48304200.pwm", "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;
}
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