From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/arm/mach-imx/pm-imx27.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 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..d94353556 --- /dev/null +++ b/arch/arm/mach-imx/pm-imx27.c @@ -0,0 +1,43 @@ +/* + * 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 "hardware.h" + +static int mx27_suspend_enter(suspend_state_t state) +{ + u32 cscr; + switch (state) { + case PM_SUSPEND_MEM: + /* Clear MPEN and SPEN to disable MPLL/SPLL */ + cscr = imx_readl(MX27_IO_ADDRESS(MX27_CCM_BASE_ADDR)); + cscr &= 0xFFFFFFFC; + imx_writel(cscr, MX27_IO_ADDRESS(MX27_CCM_BASE_ADDR)); + /* 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