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phy/rockchip: mipi-dphy: optimized power on/off sequences

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we can power off the bandgap to reduce power consumption.

Change-Id: I7959e6f1d38a6abca70d6d904264668a19ace920
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
This commit is contained in:
Wyon Bi 2018-03-09 17:42:44 +08:00 • committed by Tao Huang
commit b8a66c99b7
1 changed files with 18 additions and 0 deletions
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18
drivers/phy/rockchip/phy-rockchip-inno-mipi-dphy.c
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@ -39,6 +39,7 @@
/* Innosilicon MIPI D-PHY registers */
#define INNO_PHY_LANE_CTRL 0x00000
#define MIPI_BGPD BIT(7)
#define PWROK_BP BIT(1)
#define PWROK BIT(0)
#define INNO_PHY_POWER_CTRL 0x00004
@ -67,6 +68,8 @@
#define TTL_MODE_ENABLE BIT(2)
#define LVDS_MODE_ENABLE BIT(1)
#define MIPI_MODE_ENABLE BIT(0)
#define INNO_PHY_LVDS_CTRL 0x003ac
#define LVDS_BGPD BIT(0)
#define INNO_CLOCK_LANE_REG_BASE 0x00100
#define INNO_DATA_LANE_0_REG_BASE 0x00180
@ -409,6 +412,19 @@ static inline void inno_mipi_dphy_da_pwrok_disable(struct inno_mipi_dphy *inno)
PWROK_BP | PWROK, PWROK_BP);
}
static inline void inno_mipi_dphy_bgpd_enable(struct inno_mipi_dphy *inno)
{
regmap_update_bits(inno->regmap, INNO_PHY_LANE_CTRL, MIPI_BGPD, 0);
}
static inline void inno_mipi_dphy_bgpd_disable(struct inno_mipi_dphy *inno)
{
regmap_update_bits(inno->regmap, INNO_PHY_LANE_CTRL,
MIPI_BGPD, MIPI_BGPD);
regmap_update_bits(inno->regmap, INNO_PHY_LVDS_CTRL,
LVDS_BGPD, LVDS_BGPD);
}
static inline void inno_mipi_dphy_lane_enable(struct inno_mipi_dphy *inno)
{
u8 map[] = {0x44, 0x4c, 0x5c, 0x7c};
@ -655,6 +671,7 @@ static int inno_mipi_dphy_power_on(struct phy *phy)
clk_prepare_enable(inno->h2p_clk);
clk_prepare_enable(inno->pclk);
pm_runtime_get_sync(inno->dev);
inno_mipi_dphy_bgpd_enable(inno);
inno_mipi_dphy_da_pwrok_enable(inno);
inno_mipi_dphy_pll_enable(inno);
inno_mipi_dphy_lane_enable(inno);
@ -672,6 +689,7 @@ static int inno_mipi_dphy_power_off(struct phy *phy)
inno_mipi_dphy_lane_disable(inno);
inno_mipi_dphy_pll_disable(inno);
inno_mipi_dphy_da_pwrok_disable(inno);
inno_mipi_dphy_bgpd_disable(inno);
pm_runtime_put(inno->dev);
clk_disable_unprepare(inno->pclk);
clk_disable_unprepare(inno->h2p_clk);