From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/arm/mach-imx/pm-imx27.c | 52 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 arch/arm/mach-imx/pm-imx27.c (limited to 'arch/arm/mach-imx/pm-imx27.c') diff --git a/arch/arm/mach-imx/pm-imx27.c b/arch/arm/mach-imx/pm-imx27.c new file mode 100644 index 000000000..237e8aa9f --- /dev/null +++ b/arch/arm/mach-imx/pm-imx27.c @@ -0,0 +1,52 @@ +/* + * i.MX27 Power Management Routines + * + * Based on Freescale's BSP + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License. + */ + +#include +#include +#include +#include + +#include "common.h" +#include "hardware.h" + +static int mx27_suspend_enter(suspend_state_t state) +{ + void __iomem *ccm_base; + struct device_node *np; + u32 cscr; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx27-ccm"); + ccm_base = of_iomap(np, 0); + BUG_ON(!ccm_base); + + switch (state) { + case PM_SUSPEND_MEM: + /* Clear MPEN and SPEN to disable MPLL/SPLL */ + cscr = imx_readl(ccm_base); + cscr &= 0xFFFFFFFC; + imx_writel(cscr, ccm_base); + /* Executes WFI */ + cpu_do_idle(); + break; + + default: + return -EINVAL; + } + return 0; +} + +static const struct platform_suspend_ops mx27_suspend_ops = { + .enter = mx27_suspend_enter, + .valid = suspend_valid_only_mem, +}; + +void __init imx27_pm_init(void) +{ + suspend_set_ops(&mx27_suspend_ops); +} -- cgit v1.2.3