diff options
| author | Nitin Garg <nitin.garg@freescale.com> | 2012-05-21 08:02:46 -0500 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2012-05-21 08:17:15 -0500 |
| commit | 8a946cb9855f1327aeb8df28c7450530c3ef62e8 (patch) | |
| tree | 98d2b289e8ada57d7b99ef9eecec157528ce6ec3 | |
| parent | 332279b3b86c98883cbb9cb87b94c53ff87f0eb5 (diff) | |
ENGR00176657: Power off: Sometimes screen is lighten after system shutdown.
Shutdown the DCDC5V supply on system shutdown to avoid LVDS
being ON after shutdown. Also disable the Audio AMP to avoid
noise after shutdown.
Signed-off-by: Nitin Garg <nitin.garg@freescale.com>
| -rwxr-xr-x | arch/arm/mach-mx5/board-mx53_smd.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/board-mx53_smd.c b/arch/arm/mach-mx5/board-mx53_smd.c index 249cea44bfa5..b7487c4fb88c 100755 --- a/arch/arm/mach-mx5/board-mx53_smd.c +++ b/arch/arm/mach-mx5/board-mx53_smd.c @@ -1135,6 +1135,15 @@ static void __init fixup_mxc_board(struct machine_desc *desc, struct tag *tags, static void mx53_smd_power_off(void) { + /* Drive DCDC5V_BB_EN low to disable LVDS0/1 power */ + gpio_direction_output(MX53_SMD_DCDC5V_BB_EN, 0); + /* Drive DCDC1V8_BB_EN low to disable 1V8 voltage */ + gpio_direction_output(MX53_SMD_DCDC1V8_EN, 0); + + /* Disable the Audio AMP to avoid noise after shutdown */ + gpio_request(MX53_SMD_AUD_AMP_STBY_B, "amp-standby"); + gpio_direction_output(MX53_SMD_AUD_AMP_STBY_B, 0); + /* power off by sending shutdown command to da9053*/ da9053_power_off(); } @@ -1164,6 +1173,10 @@ static void __init mx53_smd_board_init(void) gpio_direction_output(MX53_SMD_DCDC1V8_EN, 1); gpio_set_value(MX53_SMD_DCDC1V8_EN, 1); + /* Enable MX53_SMD_DCDC5V_EN */ + gpio_request(MX53_SMD_DCDC5V_BB_EN, "dcdc5v_bb_en"); + gpio_direction_output(MX53_SMD_DCDC5V_BB_EN, 1); + /* Sii902x HDMI controller */ gpio_request(MX53_SMD_HDMI_RESET_B, "disp0-pwr-en"); gpio_direction_output(MX53_SMD_HDMI_RESET_B, 0); |