117 lines
3.4 KiB
C
117 lines
3.4 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*/
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#include <linux/kernel.h>
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/clk/ti.h>
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#include <linux/of_platform.h>
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#include <dt-bindings/clock/dm814.h>
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#include "clock.h"
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static const struct omap_clkctrl_reg_data dm814_default_clkctrl_regs[] __initconst = {
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{ DM814_USB_OTG_HS_CLKCTRL, NULL, CLKF_SW_SUP, "pll260dcoclkldo" },
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{ 0 },
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};
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static const struct omap_clkctrl_reg_data dm814_alwon_clkctrl_regs[] __initconst = {
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{ DM814_UART1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
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{ DM814_UART2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
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{ DM814_UART3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
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{ DM814_GPIO1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
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{ DM814_GPIO2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
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{ DM814_I2C1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
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{ DM814_I2C2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
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{ DM814_WD_TIMER_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sysclk18_ck" },
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{ DM814_MCSPI1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" },
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{ DM814_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" },
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{ DM814_CPGMAC0_CLKCTRL, NULL, CLKF_SW_SUP, "cpsw_125mhz_gclk" },
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{ DM814_MPU_CLKCTRL, NULL, CLKF_SW_SUP, "mpu_ck" },
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{ DM814_RTC_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sysclk18_ck" },
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{ DM814_TPCC_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
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{ DM814_TPTC0_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
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{ DM814_TPTC1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
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{ DM814_TPTC2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
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{ DM814_TPTC3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" },
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{ DM814_MMC1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
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{ DM814_MMC2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
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{ DM814_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" },
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{ 0 },
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};
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const struct omap_clkctrl_data dm814_clkctrl_data[] __initconst = {
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{ 0x48180500, dm814_default_clkctrl_regs },
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{ 0x48181400, dm814_alwon_clkctrl_regs },
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{ 0 },
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};
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static struct ti_dt_clk dm814_clks[] = {
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DT_CLK(NULL, "timer_sys_ck", "devosc_ck"),
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{ .node_name = NULL },
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};
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static bool timer_clocks_initialized;
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static int __init dm814x_adpll_early_init(void)
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{
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struct device_node *np;
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if (!timer_clocks_initialized)
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return -ENODEV;
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np = of_find_node_by_name(NULL, "pllss");
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if (!np) {
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pr_err("Could not find node for plls\n");
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return -ENODEV;
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}
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of_platform_populate(np, NULL, NULL, NULL);
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return 0;
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}
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core_initcall(dm814x_adpll_early_init);
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static const char * const init_clocks[] = {
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"pll040clkout", /* MPU 481c5040.adpll.clkout */
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"pll290clkout", /* DDR 481c5290.adpll.clkout */
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};
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static int __init dm814x_adpll_enable_init_clocks(void)
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{
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int i, err;
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if (!timer_clocks_initialized)
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return -ENODEV;
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for (i = 0; i < ARRAY_SIZE(init_clocks); i++) {
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struct clk *clock;
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clock = clk_get(NULL, init_clocks[i]);
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if (WARN(IS_ERR(clock), "could not find init clock %s\n",
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init_clocks[i]))
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continue;
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err = clk_prepare_enable(clock);
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if (WARN(err, "could not enable init clock %s\n",
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init_clocks[i]))
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continue;
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}
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return 0;
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}
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postcore_initcall(dm814x_adpll_enable_init_clocks);
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int __init dm814x_dt_clk_init(void)
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{
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ti_dt_clocks_register(dm814_clks);
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omap2_clk_disable_autoidle_all();
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ti_clk_add_aliases();
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omap2_clk_enable_init_clocks(NULL, 0);
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timer_clocks_initialized = true;
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return 0;
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}
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