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sh: mach-sdk7786: pm_power_off support.

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This wires up power-off support for the SDK7786 board.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2010-04-19 16:27:47 +09:00
parent dc825b1790
commit d9c944463d
2 changed files with 23 additions and 0 deletions
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14
arch/sh/boards/mach-sdk7786/setup.c
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@@ -165,6 +165,19 @@ static void sdk7786_restart(char *cmd)
fpga_write_reg(0xa5a5, SRSTR);
}
static void sdk7786_power_off(void)
{
fpga_write_reg(fpga_read_reg(PWRCR) | PWRCR_PDWNREQ, PWRCR);
/*
* It can take up to 20us for the R8C to do its job, back off and
* wait a bit until we've been shut off. Even though newer FPGA
* versions don't set the ACK bit, the latency issue remains.
*/
while ((fpga_read_reg(PWRCR) & PWRCR_PDWNACK) == 0)
cpu_sleep();
}
/* Initialize the board */
static void __init sdk7786_setup(char **cmdline_p)
{
@@ -175,6 +188,7 @@ static void __init sdk7786_setup(char **cmdline_p)
pr_info("\tPCB revision:\t%d\n", fpga_read_reg(PCBRR) & 0xf);
machine_ops.restart = sdk7786_restart;
pm_power_off = sdk7786_power_off;
}
/*