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ARM: nomadik: convert to generic clock

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Remove more custom stuff by simply converting the Nomadik machine
to use generic clocks and move the driver to drivers/clk.

Acked-by: Arnd Bergmann <[email protected]>
Cc: Mike Turquette <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
This commit is contained in:
Linus Walleij 2012-01-11 13:52:34 +01:00
commit 4a31bd28e8
8 changed files with 53 additions and 95 deletions
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1
drivers/clk/Makefile
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@ -3,5 +3,6 @@ obj-$(CONFIG_CLKDEV_LOOKUP) += clkdev.o
obj-$(CONFIG_COMMON_CLK) += clk.o clk-fixed-rate.o clk-gate.o \
clk-mux.o clk-divider.o clk-fixed-factor.o
# SoCs specific
obj-$(CONFIG_ARCH_NOMADIK) += clk-nomadik.o
obj-$(CONFIG_ARCH_MXS) += mxs/
obj-$(CONFIG_PLAT_SPEAR) += spear/

47
drivers/clk/clk-nomadik.c Normal file
View file

@ -0,0 +1,47 @@
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/clk-provider.h>
/*
* The Nomadik clock tree is described in the STN8815A12 DB V4.2
* reference manual for the chip, page 94 ff.
*/
void __init nomadik_clk_init(void)
{
struct clk *clk;
clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
clk_register_clkdev(clk, "apb_pclk", NULL);
clk_register_clkdev(clk, NULL, "gpio.0");
clk_register_clkdev(clk, NULL, "gpio.1");
clk_register_clkdev(clk, NULL, "gpio.2");
clk_register_clkdev(clk, NULL, "gpio.3");
clk_register_clkdev(clk, NULL, "rng");
/*
* The 2.4 MHz TIMCLK reference clock is active at boot time, this is
* actually the MXTALCLK @19.2 MHz divided by 8. This clock is used
* by the timers and watchdog. See page 105 ff.
*/
clk = clk_register_fixed_rate(NULL, "TIMCLK", NULL, CLK_IS_ROOT,
2400000);
clk_register_clkdev(clk, NULL, "mtu0");
clk_register_clkdev(clk, NULL, "mtu1");
/*
* At boot time, PLL2 is set to generate a set of fixed clocks,
* one of them is CLK48, the 48 MHz clock, routed to the UART, MMC/SD
* I2C, IrDA, USB and SSP blocks.
*/
clk = clk_register_fixed_rate(NULL, "CLK48", NULL, CLK_IS_ROOT,
48000000);
clk_register_clkdev(clk, NULL, "uart0");
clk_register_clkdev(clk, NULL, "uart1");
clk_register_clkdev(clk, NULL, "mmci");
clk_register_clkdev(clk, NULL, "ssp");
clk_register_clkdev(clk, NULL, "nmk-i2c.0");
clk_register_clkdev(clk, NULL, "nmk-i2c.1");
}