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usb: r8a66597-udc disable interrupts on shutdown fix 

This patch improves the disable_controller() function in the
r8a66597-udc driver to disable all interrupts and also clear
status flags. With this patch in place the driver survives
kexec.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2009-08-19 14:26:10 +00:00 committed by Paul Mundt
parent ef5ce3b690
commit 0bb886d2a9
1 changed files with 9 additions and 0 deletions
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9
drivers/usb/gadget/r8a66597-udc.c
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@ -614,8 +614,17 @@ static void disable_controller(struct r8a66597 *r8a66597)
if (r8a66597->pdata->on_chip) {
r8a66597_bset(r8a66597, SCKE, SYSCFG0);
/* disable interrupts */
r8a66597_write(r8a66597, 0, INTENB0);
r8a66597_write(r8a66597, 0, INTENB1);
r8a66597_write(r8a66597, 0, BRDYENB);
r8a66597_write(r8a66597, 0, BEMPENB);
r8a66597_write(r8a66597, 0, NRDYENB);
/* clear status */
r8a66597_write(r8a66597, 0, BRDYSTS);
r8a66597_write(r8a66597, 0, NRDYSTS);
r8a66597_write(r8a66597, 0, BEMPSTS);
r8a66597_bclr(r8a66597, USBE, SYSCFG0);
r8a66597_bclr(r8a66597, SCKE, SYSCFG0);