diff options
| author | Anson Huang <b20788@freescale.com> | 2014-10-20 16:16:20 +0800 |
|---|---|---|
| committer | Octavian Purdila <octavian.purdila@nxp.com> | 2017-02-23 14:21:42 +0200 |
| commit | 816978f83b1d8dd6ce3bd5dd62223dbfdf74bdd3 (patch) | |
| tree | d8b365e343cbf5080afaa6e414968d931cc341d4 /drivers/clk | |
| parent | 1e3e0b4d9babd974e7d79f581f465d3a6effbfc2 (diff) | |
MLK-9708 arm: imx: add low power idle support for i.mx6sx
Enable low power idle for i.MX6SX:
WFI -> first level idle;
WAIT mode -> second level idle;
Low power idle -> third level idle, only when system is in low bus mode.
In low powe idle mode, below operations will be done:
ARM power off;
AHB freq lower to 3MHz;
PERCLK freq lower to 6MHz;
MMDC freq lower to 1MHz;
Anatop will be put into low power mode, and regular band-gap will
be off and low power band-gap will be enabled instead.
Also, in low power idle mode, 24MHz XTAL power will be off and 24MHz clk
source will be switched to RC-OSC to save power, this feature is only
enabled on i.MX6SX TO1.2.
This patch is cherry-picked from L3.14.y, it is the latest version, below
conflicts are fixed.
Signed-off-by: Anson Huang <b20788@freescale.com>
Conflicts:
arch/arm/mach-imx/Makefile
arch/arm/mach-imx/common.h
arch/arm/mach-imx/cpuidle-imx6sx.c
arch/arm/mach-imx/cpuidle.h
arch/arm/mach-imx/mach-imx6sx.c
arch/arm/mach-imx/pm-imx6.c
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/imx/clk-imx6sx.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/clk/imx/clk-imx6sx.c b/drivers/clk/imx/clk-imx6sx.c index 890b29237af2..e045ca91a680 100644 --- a/drivers/clk/imx/clk-imx6sx.c +++ b/drivers/clk/imx/clk-imx6sx.c @@ -503,6 +503,8 @@ static void __init imx6sx_clocks_init(struct device_node *ccm_node) clk_data.clk_num = ARRAY_SIZE(clks); of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data); + clk_set_parent(clks[IMX6SX_CLK_PERCLK_SEL], clks[IMX6SX_CLK_OSC]); + for (i = 0; i < ARRAY_SIZE(clks_init_on); i++) clk_prepare_enable(clks[clks_init_on[i]]); |