diff options
Diffstat (limited to 'drivers/clk/clk-efm32gg.c')
| -rw-r--r-- | drivers/clk/clk-efm32gg.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/clk/clk-efm32gg.c b/drivers/clk/clk-efm32gg.c new file mode 100644 index 000000000..f37cf08ff --- /dev/null +++ b/drivers/clk/clk-efm32gg.c @@ -0,0 +1,87 @@ +/* + * Copyright (C) 2013 Pengutronix + * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> + * + * This program is free software; you can redistribute it and/or modify it under + * the terms of the GNU General Public License version 2 as published by the + * Free Software Foundation. + */ +#include <linux/io.h> +#include <linux/clk-provider.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/slab.h> + +#include <dt-bindings/clock/efm32-cmu.h> + +#define CMU_HFPERCLKEN0 0x44 +#define CMU_MAX_CLKS 37 + +static struct clk_hw_onecell_data *clk_data; + +static void __init efm32gg_cmu_init(struct device_node *np) +{ + int i; + void __iomem *base; + struct clk_hw **hws; + + clk_data = kzalloc(struct_size(clk_data, hws, CMU_MAX_CLKS), + GFP_KERNEL); + + if (!clk_data) + return; + + hws = clk_data->hws; + + for (i = 0; i < CMU_MAX_CLKS; ++i) + hws[i] = ERR_PTR(-ENOENT); + + base = of_iomap(np, 0); + if (!base) { + pr_warn("Failed to map address range for efm32gg,cmu node\n"); + return; + } + + hws[clk_HFXO] = clk_hw_register_fixed_rate(NULL, "HFXO", NULL, 0, + 48000000); + + hws[clk_HFPERCLKUSART0] = clk_hw_register_gate(NULL, "HFPERCLK.USART0", + "HFXO", 0, base + CMU_HFPERCLKEN0, 0, 0, NULL); + hws[clk_HFPERCLKUSART1] = clk_hw_register_gate(NULL, "HFPERCLK.USART1", + "HFXO", 0, base + CMU_HFPERCLKEN0, 1, 0, NULL); + hws[clk_HFPERCLKUSART2] = clk_hw_register_gate(NULL, "HFPERCLK.USART2", + "HFXO", 0, base + CMU_HFPERCLKEN0, 2, 0, NULL); + hws[clk_HFPERCLKUART0] = clk_hw_register_gate(NULL, "HFPERCLK.UART0", + "HFXO", 0, base + CMU_HFPERCLKEN0, 3, 0, NULL); + hws[clk_HFPERCLKUART1] = clk_hw_register_gate(NULL, "HFPERCLK.UART1", + "HFXO", 0, base + CMU_HFPERCLKEN0, 4, 0, NULL); + hws[clk_HFPERCLKTIMER0] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER0", + "HFXO", 0, base + CMU_HFPERCLKEN0, 5, 0, NULL); + hws[clk_HFPERCLKTIMER1] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER1", + "HFXO", 0, base + CMU_HFPERCLKEN0, 6, 0, NULL); + hws[clk_HFPERCLKTIMER2] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER2", + "HFXO", 0, base + CMU_HFPERCLKEN0, 7, 0, NULL); + hws[clk_HFPERCLKTIMER3] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER3", + "HFXO", 0, base + CMU_HFPERCLKEN0, 8, 0, NULL); + hws[clk_HFPERCLKACMP0] = clk_hw_register_gate(NULL, "HFPERCLK.ACMP0", + "HFXO", 0, base + CMU_HFPERCLKEN0, 9, 0, NULL); + hws[clk_HFPERCLKACMP1] = clk_hw_register_gate(NULL, "HFPERCLK.ACMP1", + "HFXO", 0, base + CMU_HFPERCLKEN0, 10, 0, NULL); + hws[clk_HFPERCLKI2C0] = clk_hw_register_gate(NULL, "HFPERCLK.I2C0", + "HFXO", 0, base + CMU_HFPERCLKEN0, 11, 0, NULL); + hws[clk_HFPERCLKI2C1] = clk_hw_register_gate(NULL, "HFPERCLK.I2C1", + "HFXO", 0, base + CMU_HFPERCLKEN0, 12, 0, NULL); + hws[clk_HFPERCLKGPIO] = clk_hw_register_gate(NULL, "HFPERCLK.GPIO", + "HFXO", 0, base + CMU_HFPERCLKEN0, 13, 0, NULL); + hws[clk_HFPERCLKVCMP] = clk_hw_register_gate(NULL, "HFPERCLK.VCMP", + "HFXO", 0, base + CMU_HFPERCLKEN0, 14, 0, NULL); + hws[clk_HFPERCLKPRS] = clk_hw_register_gate(NULL, "HFPERCLK.PRS", + "HFXO", 0, base + CMU_HFPERCLKEN0, 15, 0, NULL); + hws[clk_HFPERCLKADC0] = clk_hw_register_gate(NULL, "HFPERCLK.ADC0", + "HFXO", 0, base + CMU_HFPERCLKEN0, 16, 0, NULL); + hws[clk_HFPERCLKDAC0] = clk_hw_register_gate(NULL, "HFPERCLK.DAC0", + "HFXO", 0, base + CMU_HFPERCLKEN0, 17, 0, NULL); + + of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data); +} +CLK_OF_DECLARE(efm32ggcmu, "efm32gg,cmu", efm32gg_cmu_init); |