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linux/drivers/clk/ti/clk-43xx.c
Tony Lindgren d36edb048f clk: ti: am437x: Keep am4 l3 main clock always on for genpd 
In order for suspend and resume to work with genpd on am4, we must keep
l3 main clock always on. Otherwise prm_omap driver will shut down the l3
main clock on suspend when simple-pm-bus and GENPD_FLAG_PM_CLK are used.
Note that we already keep the l3 main clock always on with the legacy
platform code.

Later on we may want to start managing the l3 main clock with a dedicated
interconnect driver instead of using simple-pm-bus and GENPD_FLAG_PM_CLK.

Cc: linux-clk@vger.kernel.org
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2020-11-16 13:00:20 +02:00

312 lines
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/*
* AM43XX 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/am4.h>
#include "clock.h"
static const struct omap_clkctrl_reg_data am4_l3s_tsc_clkctrl_regs[] __initconst = {
{ AM4_L3S_TSC_ADC_TSC_CLKCTRL, NULL, CLKF_SW_SUP, "adc_tsc_fck" },
{ 0 },
};
static const char * const am4_synctimer_32kclk_parents[] __initconst = {
"mux_synctimer32k_ck",
NULL,
};
static const struct omap_clkctrl_bit_data am4_counter_32k_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_synctimer_32kclk_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_l4_wkup_aon_clkctrl_regs[] __initconst = {
{ AM4_L4_WKUP_AON_WKUP_M3_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sys_clkin_ck" },
{ AM4_L4_WKUP_AON_COUNTER_32K_CLKCTRL, am4_counter_32k_bit_data, CLKF_SW_SUP, "l4-wkup-aon-clkctrl:0008:8" },
{ 0 },
};
static const char * const am4_gpio0_dbclk_parents[] __initconst = {
"gpio0_dbclk_mux_ck",
NULL,
};
static const struct omap_clkctrl_bit_data am4_gpio1_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_gpio0_dbclk_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_l4_wkup_clkctrl_regs[] __initconst = {
{ AM4_L4_WKUP_L4_WKUP_CLKCTRL, NULL, CLKF_SW_SUP, "sys_clkin_ck" },
{ AM4_L4_WKUP_TIMER1_CLKCTRL, NULL, CLKF_SW_SUP, "timer1_fck" },
{ AM4_L4_WKUP_WD_TIMER2_CLKCTRL, NULL, CLKF_SW_SUP, "wdt1_fck" },
{ AM4_L4_WKUP_I2C1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_wkupdm_ck" },
{ AM4_L4_WKUP_UART1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_wkupdm_ck" },
{ AM4_L4_WKUP_SMARTREFLEX0_CLKCTRL, NULL, CLKF_SW_SUP, "smartreflex0_fck" },
{ AM4_L4_WKUP_SMARTREFLEX1_CLKCTRL, NULL, CLKF_SW_SUP, "smartreflex1_fck" },
{ AM4_L4_WKUP_CONTROL_CLKCTRL, NULL, CLKF_SW_SUP, "sys_clkin_ck" },
{ AM4_L4_WKUP_GPIO1_CLKCTRL, am4_gpio1_bit_data, CLKF_SW_SUP, "sys_clkin_ck" },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_mpu_clkctrl_regs[] __initconst = {
{ AM4_MPU_MPU_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_mpu_m2_ck" },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_gfx_l3_clkctrl_regs[] __initconst = {
{ AM4_GFX_L3_GFX_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "gfx_fck_div_ck" },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_l4_rtc_clkctrl_regs[] __initconst = {
{ AM4_L4_RTC_RTC_CLKCTRL, NULL, CLKF_SW_SUP, "clkdiv32k_ick" },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_l3_clkctrl_regs[] __initconst = {
{ AM4_L3_L3_MAIN_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_AES_CLKCTRL, NULL, CLKF_SW_SUP, "aes0_fck" },
{ AM4_L3_DES_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_L3_INSTR_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_OCMCRAM_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_SHAM_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_TPCC_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_TPTC0_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_TPTC1_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_TPTC2_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3_L4_HS_CLKCTRL, NULL, CLKF_SW_SUP, "l4hs_gclk" },
{ 0 },
};
static const char * const am4_usb_otg_ss0_refclk960m_parents[] __initconst = {
"dpll_per_clkdcoldo",
NULL,
};
static const struct omap_clkctrl_bit_data am4_usb_otg_ss0_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_usb_otg_ss0_refclk960m_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_bit_data am4_usb_otg_ss1_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_usb_otg_ss0_refclk960m_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_l3s_clkctrl_regs[] __initconst = {
{ AM4_L3S_VPFE0_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3S_VPFE1_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" },
{ AM4_L3S_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "l3s_gclk" },
{ AM4_L3S_MCASP0_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp0_fck" },
{ AM4_L3S_MCASP1_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp1_fck" },
{ AM4_L3S_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" },
{ AM4_L3S_QSPI_CLKCTRL, NULL, CLKF_SW_SUP, "l3s_gclk" },
{ AM4_L3S_USB_OTG_SS0_CLKCTRL, am4_usb_otg_ss0_bit_data, CLKF_SW_SUP, "l3s_gclk" },
{ AM4_L3S_USB_OTG_SS1_CLKCTRL, am4_usb_otg_ss1_bit_data, CLKF_SW_SUP, "l3s_gclk" },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_pruss_ocp_clkctrl_regs[] __initconst = {
{ AM4_PRUSS_OCP_PRUSS_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "pruss_ocp_gclk" },
{ 0 },
};
static const char * const am4_gpio1_dbclk_parents[] __initconst = {
"clkdiv32k_ick",
NULL,
};
static const struct omap_clkctrl_bit_data am4_gpio2_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_gpio1_dbclk_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_bit_data am4_gpio3_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_gpio1_dbclk_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_bit_data am4_gpio4_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_gpio1_dbclk_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_bit_data am4_gpio5_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_gpio1_dbclk_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_bit_data am4_gpio6_bit_data[] __initconst = {
{ 8, TI_CLK_GATE, am4_gpio1_dbclk_parents, NULL },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_l4ls_clkctrl_regs[] __initconst = {
{ AM4_L4LS_L4_LS_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_D_CAN0_CLKCTRL, NULL, CLKF_SW_SUP, "dcan0_fck" },
{ AM4_L4LS_D_CAN1_CLKCTRL, NULL, CLKF_SW_SUP, "dcan1_fck" },
{ AM4_L4LS_EPWMSS0_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_EPWMSS1_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_EPWMSS2_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_EPWMSS3_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_EPWMSS4_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_EPWMSS5_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_ELM_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_GPIO2_CLKCTRL, am4_gpio2_bit_data, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_GPIO3_CLKCTRL, am4_gpio3_bit_data, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_GPIO4_CLKCTRL, am4_gpio4_bit_data, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_GPIO5_CLKCTRL, am4_gpio5_bit_data, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_GPIO6_CLKCTRL, am4_gpio6_bit_data, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_HDQ1W_CLKCTRL, NULL, CLKF_SW_SUP, "func_12m_clk" },
{ AM4_L4LS_I2C2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_I2C3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_MAILBOX_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_MMC1_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" },
{ AM4_L4LS_MMC2_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" },
{ AM4_L4LS_RNG_CLKCTRL, NULL, CLKF_SW_SUP, "rng_fck" },
{ AM4_L4LS_SPI0_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_SPI1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_SPI2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_SPI3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_SPI4_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_SPINLOCK_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_TIMER2_CLKCTRL, NULL, CLKF_SW_SUP, "timer2_fck" },
{ AM4_L4LS_TIMER3_CLKCTRL, NULL, CLKF_SW_SUP, "timer3_fck" },
{ AM4_L4LS_TIMER4_CLKCTRL, NULL, CLKF_SW_SUP, "timer4_fck" },
{ AM4_L4LS_TIMER5_CLKCTRL, NULL, CLKF_SW_SUP, "timer5_fck" },
{ AM4_L4LS_TIMER6_CLKCTRL, NULL, CLKF_SW_SUP, "timer6_fck" },
{ AM4_L4LS_TIMER7_CLKCTRL, NULL, CLKF_SW_SUP, "timer7_fck" },
{ AM4_L4LS_TIMER8_CLKCTRL, NULL, CLKF_SW_SUP, "timer8_fck" },
{ AM4_L4LS_TIMER9_CLKCTRL, NULL, CLKF_SW_SUP, "timer9_fck" },
{ AM4_L4LS_TIMER10_CLKCTRL, NULL, CLKF_SW_SUP, "timer10_fck" },
{ AM4_L4LS_TIMER11_CLKCTRL, NULL, CLKF_SW_SUP, "timer11_fck" },
{ AM4_L4LS_UART2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_UART3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_UART4_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_UART5_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_UART6_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" },
{ AM4_L4LS_OCP2SCP0_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ AM4_L4LS_OCP2SCP1_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_emif_clkctrl_regs[] __initconst = {
{ AM4_EMIF_EMIF_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_ddr_m2_ck" },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_dss_clkctrl_regs[] __initconst = {
{ AM4_DSS_DSS_CORE_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_SET_RATE_PARENT, "disp_clk" },
{ 0 },
};
static const struct omap_clkctrl_reg_data am4_cpsw_125mhz_clkctrl_regs[] __initconst = {
{ AM4_CPSW_125MHZ_CPGMAC0_CLKCTRL, NULL, CLKF_SW_SUP, "cpsw_125mhz_gclk" },
{ 0 },
};
const struct omap_clkctrl_data am4_clkctrl_data[] __initconst = {
{ 0x44df2920, am4_l3s_tsc_clkctrl_regs },
{ 0x44df2a28, am4_l4_wkup_aon_clkctrl_regs },
{ 0x44df2a20, am4_l4_wkup_clkctrl_regs },
{ 0x44df8320, am4_mpu_clkctrl_regs },
{ 0x44df8420, am4_gfx_l3_clkctrl_regs },
{ 0x44df8520, am4_l4_rtc_clkctrl_regs },
{ 0x44df8820, am4_l3_clkctrl_regs },
{ 0x44df8868, am4_l3s_clkctrl_regs },
{ 0x44df8b20, am4_pruss_ocp_clkctrl_regs },
{ 0x44df8c20, am4_l4ls_clkctrl_regs },
{ 0x44df8f20, am4_emif_clkctrl_regs },
{ 0x44df9220, am4_dss_clkctrl_regs },
{ 0x44df9320, am4_cpsw_125mhz_clkctrl_regs },
{ 0 },
};
const struct omap_clkctrl_data am438x_clkctrl_data[] __initconst = {
{ 0x44df2920, am4_l3s_tsc_clkctrl_regs },
{ 0x44df2a28, am4_l4_wkup_aon_clkctrl_regs },
{ 0x44df2a20, am4_l4_wkup_clkctrl_regs },
{ 0x44df8320, am4_mpu_clkctrl_regs },
{ 0x44df8420, am4_gfx_l3_clkctrl_regs },
{ 0x44df8820, am4_l3_clkctrl_regs },
{ 0x44df8868, am4_l3s_clkctrl_regs },
{ 0x44df8b20, am4_pruss_ocp_clkctrl_regs },
{ 0x44df8c20, am4_l4ls_clkctrl_regs },
{ 0x44df8f20, am4_emif_clkctrl_regs },
{ 0x44df9220, am4_dss_clkctrl_regs },
{ 0x44df9320, am4_cpsw_125mhz_clkctrl_regs },
{ 0 },
};
static struct ti_dt_clk am43xx_clks[] = {
DT_CLK(NULL, "timer_32k_ck", "clkdiv32k_ick"),
DT_CLK(NULL, "timer_sys_ck", "sys_clkin_ck"),
DT_CLK(NULL, "gpio0_dbclk", "l4-wkup-clkctrl:0148:8"),
DT_CLK(NULL, "gpio1_dbclk", "l4ls-clkctrl:0058:8"),
DT_CLK(NULL, "gpio2_dbclk", "l4ls-clkctrl:0060:8"),
DT_CLK(NULL, "gpio3_dbclk", "l4ls-clkctrl:0068:8"),
DT_CLK(NULL, "gpio4_dbclk", "l4ls-clkctrl:0070:8"),
DT_CLK(NULL, "gpio5_dbclk", "l4ls-clkctrl:0078:8"),
DT_CLK(NULL, "synctimer_32kclk", "l4-wkup-aon-clkctrl:0008:8"),
DT_CLK(NULL, "usb_otg_ss0_refclk960m", "l3s-clkctrl:01f8:8"),
DT_CLK(NULL, "usb_otg_ss1_refclk960m", "l3s-clkctrl:0200:8"),
{ .node_name = NULL },
};
static const char *enable_init_clks[] = {
/* AM4_L3_L3_MAIN_CLKCTRL, needed during suspend */
"l3-clkctrl:0000:0",
};
int __init am43xx_dt_clk_init(void)
{
struct clk *clk1, *clk2;
if (ti_clk_get_features()->flags & TI_CLK_CLKCTRL_COMPAT)
ti_dt_clocks_register(am43xx_compat_clks);
else
ti_dt_clocks_register(am43xx_clks);
omap2_clk_disable_autoidle_all();
omap2_clk_enable_init_clocks(enable_init_clks,
ARRAY_SIZE(enable_init_clks));
ti_clk_add_aliases();
/*
* cpsw_cpts_rft_clk has got the choice of 3 clocksources
* dpll_core_m4_ck, dpll_core_m5_ck and dpll_disp_m2_ck.
* By default dpll_core_m4_ck is selected, witn this as clock
* source the CPTS doesnot work properly. It gives clockcheck errors
* while running PTP.
* clockcheck: clock jumped backward or running slower than expected!
* By selecting dpll_core_m5_ck as the clocksource fixes this issue.
* In AM335x dpll_core_m5_ck is the default clocksource.
*/
clk1 = clk_get_sys(NULL, "cpsw_cpts_rft_clk");
clk2 = clk_get_sys(NULL, "dpll_core_m5_ck");
clk_set_parent(clk1, clk2);
return 0;
}
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