arm/mach-at91/pm_suspend.S

1 /* SPDX-License-Identifier: GPL-2.0-only */
3  * arch/arm/mach-at91/pm_slow_clock.S
13 #include "pm_data-offsets.h"
16 .arch armv7-a
28  * Wait until master clock is ready (after switching master clock source)
30  * @r_mckid:	register holding master clock identifier
32  * Side effects: overwrites r7, r8
49  * Wait until master oscillator has stabilized.
51  * Side effects: overwrites r7
62  * Side effects: overwrites r7
73  * Side effects: overwrites r7
92  * @ena: 0 - disable regulator
93  *	 1 - enable regulator
95  * Side effects: overwrites r7, r8, r9, r10
125  * Enable self-refresh
127  * Side effects: overwrites r2, r3, tmp1, tmp2, tmp3, r7
164 	/* Switch to self-refresh. */
170 	/* Wait for self-refresh enter. */
176 	/* Disable DX DLLs for non-backup modes. */
214  * Disable self-refresh
216  * Side effects: overwrites r2, r3, tmp1, tmp2, tmp3
248 	/* Enable quasi-dynamic programming. */
252 	/* De-assert SDRAM initialization. */
257 	/* Quasi-dynamic programming done. */
266 	/* DLL soft-reset + DLL lock wait + ITM reset */
277 	/* Enable quasi-dynamic programming. */
296 	/* Trigger self-refresh exit. */
302 	/* Wait for self-refresh exit done. */
333  * Enable self-refresh
347 	/* Active SDRAM self-refresh mode */
360 	/* LPDDR1 --> force DDR2 mode during self-refresh */
370 	/* Active DDRC self-refresh mode */
391 	/* Active DDRC self-refresh mode */
405 	/* Active SDRAMC self-refresh mode */
419  * Disable self-refresh
438 	  * For exiting the self-refresh mode, do nothing,
439 	  * automatically exit the self-refresh mode.
590 	/* Switch the main clock source to 12-MHz RC oscillator */
606 	/* Switch the master clock source to main clock */
636 	/* Switch the master clock source to slow clock */
652 	/* Switch the master clock source to main clock */
819  * Side effects: overwrites tmp1, tmp2
875  * Side effects: overwrites tmp1, tmp2
936 	/* Save Master clock setting */
941 	 * Set master clock source to:
942 	 * - MAINCK if using ULP0 fast variant
943 	 * - slow clock, otherwise
980 	 * Restore master clock setting
993 	/* Switch the master clock source to slow clock. */
1026 /* at91_pm_suspend_in_sram must be 8-byte aligned per the requirements of fncpy() */
1030 	stmfd	sp!, {r4 - r12, lr}
1051 	 * to RAM may be limited while in self-refresh.
1086 	/* Active the self-refresh mode */
1108 	/* Exit the self-refresh mode */
1112 	ldmfd	sp!, {r4 - r12, pc}
1161 	.word .-at91_pm_suspend_in_sram