Commit 9ed9c07d authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Mike Turquette

clk: new driver for efm32 SoC

This patch adds support for the clocks provided by the Clock Management
Unit of Energy Micro's efm32 Giant Gecko SoCs including device tree
bindings.
Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarMike Turquette <mturquette@linaro.org>
parent f6102742
* Clock bindings for Energy Micro efm32 Giant Gecko's Clock Management Unit
Required properties:
- compatible: Should be "efm32gg,cmu"
- reg: Base address and length of the register set
- interrupts: Interrupt used by the CMU
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock ID in
its "clocks" phandle cell. The header efm32-clk.h contains a list of available
IDs.
......@@ -11,6 +11,7 @@ obj-$(CONFIG_COMMON_CLK) += clk-composite.o
# SoCs specific
obj-$(CONFIG_ARCH_BCM2835) += clk-bcm2835.o
obj-$(CONFIG_ARCH_EFM32) += clk-efm32gg.o
obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o
obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
obj-$(CONFIG_ARCH_NSPIRE) += clk-nspire.o
......
/*
* 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/clk.h>
#include <linux/io.h>
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <dt-bindings/clock/efm32-cmu.h>
#define CMU_HFPERCLKEN0 0x44
static struct clk *clk[37];
static struct clk_onecell_data clk_data = {
.clks = clk,
.clk_num = ARRAY_SIZE(clk),
};
static int __init efm32gg_cmu_init(struct device_node *np)
{
int i;
void __iomem *base;
for (i = 0; i < ARRAY_SIZE(clk); ++i)
clk[i] = ERR_PTR(-ENOENT);
base = of_iomap(np, 0);
if (!base) {
pr_warn("Failed to map address range for efm32gg,cmu node\n");
return -EADDRNOTAVAIL;
}
clk[clk_HFXO] = clk_register_fixed_rate(NULL, "HFXO", NULL,
CLK_IS_ROOT, 48000000);
clk[clk_HFPERCLKUSART0] = clk_register_gate(NULL, "HFPERCLK.USART0",
"HFXO", 0, base + CMU_HFPERCLKEN0, 0, 0, NULL);
clk[clk_HFPERCLKUSART1] = clk_register_gate(NULL, "HFPERCLK.USART1",
"HFXO", 0, base + CMU_HFPERCLKEN0, 1, 0, NULL);
clk[clk_HFPERCLKUSART2] = clk_register_gate(NULL, "HFPERCLK.USART2",
"HFXO", 0, base + CMU_HFPERCLKEN0, 2, 0, NULL);
clk[clk_HFPERCLKUART0] = clk_register_gate(NULL, "HFPERCLK.UART0",
"HFXO", 0, base + CMU_HFPERCLKEN0, 3, 0, NULL);
clk[clk_HFPERCLKUART1] = clk_register_gate(NULL, "HFPERCLK.UART1",
"HFXO", 0, base + CMU_HFPERCLKEN0, 4, 0, NULL);
clk[clk_HFPERCLKTIMER0] = clk_register_gate(NULL, "HFPERCLK.TIMER0",
"HFXO", 0, base + CMU_HFPERCLKEN0, 5, 0, NULL);
clk[clk_HFPERCLKTIMER1] = clk_register_gate(NULL, "HFPERCLK.TIMER1",
"HFXO", 0, base + CMU_HFPERCLKEN0, 6, 0, NULL);
clk[clk_HFPERCLKTIMER2] = clk_register_gate(NULL, "HFPERCLK.TIMER2",
"HFXO", 0, base + CMU_HFPERCLKEN0, 7, 0, NULL);
clk[clk_HFPERCLKTIMER3] = clk_register_gate(NULL, "HFPERCLK.TIMER3",
"HFXO", 0, base + CMU_HFPERCLKEN0, 8, 0, NULL);
clk[clk_HFPERCLKACMP0] = clk_register_gate(NULL, "HFPERCLK.ACMP0",
"HFXO", 0, base + CMU_HFPERCLKEN0, 9, 0, NULL);
clk[clk_HFPERCLKACMP1] = clk_register_gate(NULL, "HFPERCLK.ACMP1",
"HFXO", 0, base + CMU_HFPERCLKEN0, 10, 0, NULL);
clk[clk_HFPERCLKI2C0] = clk_register_gate(NULL, "HFPERCLK.I2C0",
"HFXO", 0, base + CMU_HFPERCLKEN0, 11, 0, NULL);
clk[clk_HFPERCLKI2C1] = clk_register_gate(NULL, "HFPERCLK.I2C1",
"HFXO", 0, base + CMU_HFPERCLKEN0, 12, 0, NULL);
clk[clk_HFPERCLKGPIO] = clk_register_gate(NULL, "HFPERCLK.GPIO",
"HFXO", 0, base + CMU_HFPERCLKEN0, 13, 0, NULL);
clk[clk_HFPERCLKVCMP] = clk_register_gate(NULL, "HFPERCLK.VCMP",
"HFXO", 0, base + CMU_HFPERCLKEN0, 14, 0, NULL);
clk[clk_HFPERCLKPRS] = clk_register_gate(NULL, "HFPERCLK.PRS",
"HFXO", 0, base + CMU_HFPERCLKEN0, 15, 0, NULL);
clk[clk_HFPERCLKADC0] = clk_register_gate(NULL, "HFPERCLK.ADC0",
"HFXO", 0, base + CMU_HFPERCLKEN0, 16, 0, NULL);
clk[clk_HFPERCLKDAC0] = clk_register_gate(NULL, "HFPERCLK.DAC0",
"HFXO", 0, base + CMU_HFPERCLKEN0, 17, 0, NULL);
return of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
}
CLK_OF_DECLARE(efm32ggcmu, "efm32gg,cmu", efm32gg_cmu_init);
#ifndef __DT_BINDINGS_CLOCK_EFM32_CMU_H
#define __DT_BINDINGS_CLOCK_EFM32_CMU_H
#define clk_HFXO 0
#define clk_HFRCO 1
#define clk_LFXO 2
#define clk_LFRCO 3
#define clk_ULFRCO 4
#define clk_AUXHFRCO 5
#define clk_HFCLKNODIV 6
#define clk_HFCLK 7
#define clk_HFPERCLK 8
#define clk_HFCORECLK 9
#define clk_LFACLK 10
#define clk_LFBCLK 11
#define clk_WDOGCLK 12
#define clk_HFCORECLKDMA 13
#define clk_HFCORECLKAES 14
#define clk_HFCORECLKUSBC 15
#define clk_HFCORECLKUSB 16
#define clk_HFCORECLKLE 17
#define clk_HFCORECLKEBI 18
#define clk_HFPERCLKUSART0 19
#define clk_HFPERCLKUSART1 20
#define clk_HFPERCLKUSART2 21
#define clk_HFPERCLKUART0 22
#define clk_HFPERCLKUART1 23
#define clk_HFPERCLKTIMER0 24
#define clk_HFPERCLKTIMER1 25
#define clk_HFPERCLKTIMER2 26
#define clk_HFPERCLKTIMER3 27
#define clk_HFPERCLKACMP0 28
#define clk_HFPERCLKACMP1 29
#define clk_HFPERCLKI2C0 30
#define clk_HFPERCLKI2C1 31
#define clk_HFPERCLKGPIO 32
#define clk_HFPERCLKVCMP 33
#define clk_HFPERCLKPRS 34
#define clk_HFPERCLKADC0 35
#define clk_HFPERCLKDAC0 36
#endif /* __DT_BINDINGS_CLOCK_EFM32_CMU_H */
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