diff options
| author | Stefan Agner <stefan.agner@toradex.com> | 2017-03-03 19:53:08 -0800 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2017-04-03 15:36:39 +0200 |
| commit | a86db1f7117a62019106e343ff894c6bd4da053d (patch) | |
| tree | 62539e2d1d090be982e15ec40d9975bc87271c00 | |
| parent | 98adbbaef78b8a401350a0bf27c3ddc1881ec34d (diff) | |
ARM: imx: mu: let Cortex-M4 know about A7 state
Introduce two new messages to let the Cortex-M4 know in what
state the Linux system is in.
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
| -rw-r--r-- | arch/arm/mach-imx/mu.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/arm/mach-imx/mu.c b/arch/arm/mach-imx/mu.c index e6ebd6c253d8..d08f96216863 100644 --- a/arch/arm/mach-imx/mu.c +++ b/arch/arm/mach-imx/mu.c @@ -32,6 +32,8 @@ #define MU_LPM_HANDSHAKE_INDEX 0 #define MU_RPMSG_HANDSHAKE_INDEX 1 +#define MU_LPM_M4_LPM_READY 0xFFFF4444 +#define MU_LPM_M4_LPM_SLEEP 0xFFFF5555 #define MU_LPM_BUS_HIGH_READY_FOR_M4 0xFFFF6666 #define MU_LPM_M4_FREQ_CHANGE_READY 0xFFFF7777 #define MU_LPM_M4_REQUEST_HIGH_BUS 0x2222CCCC @@ -286,10 +288,14 @@ int imx_mu_lpm_ready(bool ready) u32 val; val = readl_relaxed(mu_base + MU_ACR); - if (ready) + if (ready) { + imx_mu_send_message(MU_LPM_HANDSHAKE_INDEX, MU_LPM_M4_LPM_READY); writel_relaxed(val | BIT(0), mu_base + MU_ACR); - else + } else { + imx_mu_send_message(MU_LPM_HANDSHAKE_INDEX, MU_LPM_M4_LPM_SLEEP); writel_relaxed(val & ~BIT(0), mu_base + MU_ACR); + } + return 0; } |