diff options
Diffstat (limited to 'drivers/clk/ti/clk-814x.c')
| -rw-r--r-- | drivers/clk/ti/clk-814x.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/drivers/clk/ti/clk-814x.c b/drivers/clk/ti/clk-814x.c new file mode 100644 index 000000000..f688fdd2c --- /dev/null +++ b/drivers/clk/ti/clk-814x.c @@ -0,0 +1,116 @@ +/* + * 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. + */ + +#include <linux/kernel.h> +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <linux/clk/ti.h> +#include <linux/of_platform.h> +#include <dt-bindings/clock/dm814.h> + +#include "clock.h" + +static const struct omap_clkctrl_reg_data dm814_default_clkctrl_regs[] __initconst = { + { DM814_USB_OTG_HS_CLKCTRL, NULL, CLKF_SW_SUP, "pll260dcoclkldo" }, + { 0 }, +}; + +static const struct omap_clkctrl_reg_data dm814_alwon_clkctrl_regs[] __initconst = { + { DM814_UART1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" }, + { DM814_UART2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" }, + { DM814_UART3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" }, + { DM814_GPIO1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" }, + { DM814_GPIO2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" }, + { DM814_I2C1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" }, + { DM814_I2C2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" }, + { DM814_WD_TIMER_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sysclk18_ck" }, + { DM814_MCSPI1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk10_ck" }, + { DM814_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk6_ck" }, + { DM814_CPGMAC0_CLKCTRL, NULL, CLKF_SW_SUP, "cpsw_125mhz_gclk" }, + { DM814_MPU_CLKCTRL, NULL, CLKF_SW_SUP, "mpu_ck" }, + { DM814_RTC_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "sysclk18_ck" }, + { DM814_TPCC_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" }, + { DM814_TPTC0_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" }, + { DM814_TPTC1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" }, + { DM814_TPTC2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" }, + { DM814_TPTC3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk4_ck" }, + { DM814_MMC1_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" }, + { DM814_MMC2_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" }, + { DM814_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "sysclk8_ck" }, + { 0 }, +}; + +const struct omap_clkctrl_data dm814_clkctrl_data[] __initconst = { + { 0x48180500, dm814_default_clkctrl_regs }, + { 0x48181400, dm814_alwon_clkctrl_regs }, + { 0 }, +}; + +static struct ti_dt_clk dm814_clks[] = { + DT_CLK(NULL, "timer_sys_ck", "devosc_ck"), + { .node_name = NULL }, +}; + +static bool timer_clocks_initialized; + +static int __init dm814x_adpll_early_init(void) +{ + struct device_node *np; + + if (!timer_clocks_initialized) + return -ENODEV; + + np = of_find_node_by_name(NULL, "pllss"); + if (!np) { + pr_err("Could not find node for plls\n"); + return -ENODEV; + } + + of_platform_populate(np, NULL, NULL, NULL); + + return 0; +} +core_initcall(dm814x_adpll_early_init); + +static const char * const init_clocks[] = { + "pll040clkout", /* MPU 481c5040.adpll.clkout */ + "pll290clkout", /* DDR 481c5290.adpll.clkout */ +}; + +static int __init dm814x_adpll_enable_init_clocks(void) +{ + int i, err; + + if (!timer_clocks_initialized) + return -ENODEV; + + for (i = 0; i < ARRAY_SIZE(init_clocks); i++) { + struct clk *clock; + + clock = clk_get(NULL, init_clocks[i]); + if (WARN(IS_ERR(clock), "could not find init clock %s\n", + init_clocks[i])) + continue; + err = clk_prepare_enable(clock); + if (WARN(err, "could not enable init clock %s\n", + init_clocks[i])) + continue; + } + + return 0; +} +postcore_initcall(dm814x_adpll_enable_init_clocks); + +int __init dm814x_dt_clk_init(void) +{ + ti_dt_clocks_register(dm814_clks); + omap2_clk_disable_autoidle_all(); + ti_clk_add_aliases(); + omap2_clk_enable_init_clocks(NULL, 0); + timer_clocks_initialized = true; + + return 0; +} |