Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 460d4117 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Simon Horman
Browse files

ARM: shmobile: apmu: Add more register documentation 



Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Tested-by: default avatarHiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 7ce7d89f

arch/arm/mach-shmobile/platsmp-apmu.c

+10 −4
Original line number Diff line number Diff line
@@ -31,9 +31,15 @@ static struct { 
	int bit;

} apmu_cpus[NR_CPUS];



#define WUPCR_OFFS 0x10

#define PSTR_OFFS 0x40

#define WUPCR_OFFS	 0x10		/* Wake Up Control Register */

#define PSTR_OFFS	 0x40		/* Power Status Register */

#define CPUNCR_OFFS(n)	(0x100 + (0x10 * (n)))

					/* CPUn Power Status Control Register */



/* Power Status Register */

#define CPUNST(r, n)	(((r) >> (n * 4)) & 3)	/* CPUn Status Bit */

#define CPUST_RUN	0		/* Run Mode */

#define CPUST_STANDBY	3		/* CoreStandby Mode */



static int __maybe_unused apmu_power_on(void __iomem *p, int bit)

{
@@ -59,7 +65,7 @@ static int __maybe_unused apmu_power_off_poll(void __iomem *p, int bit) 
	int k;



	for (k = 0; k < 1000; k++) {

		if (((readl_relaxed(p + PSTR_OFFS) >> (bit * 4)) & 0x03) == 3)

		if (CPUNST(readl_relaxed(p + PSTR_OFFS), bit) == CPUST_STANDBY)

			return 1;



		mdelay(1);