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| author |   Paul Mundt <lethal@linux-sh.org> | 2010-01-19 20:09:28 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-01-19 20:09:28 +0900 |
| commit | dea3cf1c3935047a5b0d21b21d26718e09135f97 (patch) | |
| tree | dc3a68c98304a54b77330d4be2a8d06fa0e09ecb /arch/sh | |
| parent | sh: mach-sdk7786: Detect/configure/propagate EXTAL. (diff) | |
| download | linux-dev-dea3cf1c3935047a5b0d21b21d26718e09135f97.tar.xz linux-dev-dea3cf1c3935047a5b0d21b21d26718e09135f97.zip | |
sh: urquell: Handle EXTAL configuration here, too.
urquell happens to use the same mode pins and EXTAL configuration as
SDK7786, so just copy it over.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/boards/board-urquell.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/sh/boards/board-urquell.c b/arch/sh/boards/board-urquell.c index 268f09e46568..8aeac64810dc 100644 --- a/arch/sh/boards/board-urquell.c +++ b/arch/sh/boards/board-urquell.c @@ -2,7 +2,7 @@ * Renesas Technology Corp. SH7786 Urquell Support. * * Copyright (C) 2008 Kuninori Morimoto <morimoto.kuninori@renesas.com> - * Copyright (C) 2009 Paul Mundt + * Copyright (C) 2009, 2010 Paul Mundt * * Based on board-sh7785lcr.c * Copyright (C) 2008 Yoshihiro Shimoda @@ -19,6 +19,7 @@ #include <linux/delay.h> #include <linux/gpio.h> #include <linux/irq.h> +#include <linux/clk.h> #include <mach/urquell.h> #include <cpu/sh7786.h> #include <asm/heartbeat.h> @@ -175,6 +176,27 @@ static int urquell_mode_pins(void) return __raw_readw(UBOARDREG(MDSWMR)); } +static int urquell_clk_init(void) +{ + struct clk *clk; + int ret; + + /* + * Only handle the EXTAL case, anyone interfacing a crystal + * resonator will need to provide their own input clock. + */ + if (test_mode_pin(MODE_PIN9)) + return -EINVAL; + + clk = clk_get(NULL, "extal"); + if (!clk || IS_ERR(clk)) + return PTR_ERR(clk); + ret = clk_set_rate(clk, 33333333); + clk_put(clk); + + return ret; +} + /* Initialize the board */ static void __init urquell_setup(char **cmdline_p) { @@ -191,4 +213,5 @@ static struct sh_machine_vector mv_urquell __initmv = { .mv_setup = urquell_setup, .mv_init_irq = urquell_init_irq, .mv_mode_pins = urquell_mode_pins, + .mv_clk_init = urquell_clk_init, }; |