Hi Sachin Kamat,
The "hdmi-en" regulator was used to enable DC-DC converter(s).
The converters supply HDMI hardware or produce 5V for HDMI connector. According to Origen schematics 'DC5V' line is used to supply 5V to HDMI connector. Therefore regulator 'hdmi-en' refers to the regulator associated with 'DC5V' line. If the 'DC5V' regulator is not present in mach-origen.c (???) then 'hdmi-en' becomes a dummy regulator.

Try to enable REGULATOR_DUMMY in kernel config.

The regulator framework would associate a dummy regulator to 'hdmi-en' if it fails to find it.

I hope you find this information useful.

Best regards,
Tomasz Stanislawski


On 10/07/2011 12:00 PM, Sachin Kamat wrote:
Hi Tomasz,
What is the significance of "hdmi-en" as a regulator? Is this specific
to your board.
I am unable to relate the GPIO pin corresponding to it on Origen board.
Thanks and regards
Sachin

On 12 August 2011 15:15, Tomasz Stanislawski <t.stanisl...@samsung.com
<mailto:t.stanisl...@samsung.com>> wrote:

    This patch adds platform devices and regulators for TV devices on
    Samsung Universal C210 board.

    Signed-off-by: Tomasz Stanislawski <t.stanisl...@samsung.com
    <mailto:t.stanisl...@samsung.com>>
    Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com
    <mailto:kyungmin.p...@samsung.com>>
    Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com
    <mailto:m.szyprow...@samsung.com>>
    ---
      arch/arm/mach-exynos4/Kconfig               |    2 +
      arch/arm/mach-exynos4/mach-universal_c210.c |   74
    +++++++++++++++++++++++++++
      2 files changed, 76 insertions(+), 0 deletions(-)

    diff --git a/arch/arm/mach-exynos4/Kconfig
    b/arch/arm/mach-exynos4/Kconfig
    index 3ceefdb..144c05d 100644
    --- a/arch/arm/mach-exynos4/Kconfig
    +++ b/arch/arm/mach-exynos4/Kconfig
    @@ -184,9 +184,11 @@ config MACH_UNIVERSAL_C210
            select S3C_DEV_I2C1
            select S3C_DEV_I2C3
            select S3C_DEV_I2C5
    +       select S5P_DEV_I2C_HDMIPHY
            select S5P_DEV_MFC
            select S5P_DEV_ONENAND
            select EXYNOS4_DEV_PD
    +       select S5P_DEV_TV
            select EXYNOS4_SETUP_I2C1
            select EXYNOS4_SETUP_I2C3
            select EXYNOS4_SETUP_I2C5
    diff --git a/arch/arm/mach-exynos4/mach-universal_c210.c
    b/arch/arm/mach-exynos4/mach-universal_c210.c
    index 0e280d1..e9dbe79 100644
    --- a/arch/arm/mach-exynos4/mach-universal_c210.c
    +++ b/arch/arm/mach-exynos4/mach-universal_c210.c
    @@ -110,6 +110,9 @@ static struct regulator_consumer_supply
    lp3974_buck1_consumer =
      static struct regulator_consumer_supply lp3974_buck2_consumer =
            REGULATOR_SUPPLY("vddg3d", NULL);

    +static struct regulator_consumer_supply lp3974_buck3_consumer =
    +       REGULATOR_SUPPLY("vdet", "s5p-sdo");
    +
      static struct regulator_init_data lp3974_buck1_data = {
            .constraints    = {
                    .name           = "VINT_1.1V",
    @@ -153,6 +156,8 @@ static struct regulator_init_data
    lp3974_buck3_data = {
                            .enabled        = 1,
                    },
            },
    +       .num_consumer_supplies = 1,
    +       .consumer_supplies = &lp3974_buck3_consumer,
      };

      static struct regulator_init_data lp3974_buck4_data = {
    @@ -181,6 +186,11 @@ static struct regulator_init_data
    lp3974_ldo2_data = {
            },
      };

    +static struct regulator_consumer_supply lp3974_ldo3_consumer[] = {
    +       REGULATOR_SUPPLY("vdd", "exynos4-hdmi"),
    +       REGULATOR_SUPPLY("vdd_pll", "exynos4-hdmi"),
    +};
    +
      static struct regulator_init_data lp3974_ldo3_data = {
            .constraints    = {
                    .name           = "VUSB+MIPI_1.1V",
    @@ -192,6 +202,12 @@ static struct regulator_init_data
    lp3974_ldo3_data = {
                            .disabled       = 1,
                    },
            },
    +       .num_consumer_supplies = ARRAY_SIZE(lp3974_ldo3_consumer),
    +       .consumer_supplies = lp3974_ldo3_consumer,
    +};
    +
    +static struct regulator_consumer_supply lp3974_ldo4_consumer[] = {
    +       REGULATOR_SUPPLY("vdd_osc", "exynos4-hdmi"),
      };

      static struct regulator_init_data lp3974_ldo4_data = {
    @@ -205,6 +221,8 @@ static struct regulator_init_data
    lp3974_ldo4_data = {
                            .disabled       = 1,
                    },
            },
    +       .num_consumer_supplies = ARRAY_SIZE(lp3974_ldo4_consumer),
    +       .consumer_supplies = lp3974_ldo4_consumer,
      };

      static struct regulator_init_data lp3974_ldo5_data = {
    @@ -246,6 +264,10 @@ static struct regulator_init_data
    lp3974_ldo7_data = {
            },
      };

    +static struct regulator_consumer_supply lp3974_ldo8_consumer[] = {
    +       REGULATOR_SUPPLY("vdd33a_dac", "s5p-sdo"),
    +};
    +
      static struct regulator_init_data lp3974_ldo8_data = {
            .constraints    = {
                    .name           = "VUSB+VDAC_3.3V",
    @@ -257,6 +279,8 @@ static struct regulator_init_data
    lp3974_ldo8_data = {
                            .disabled       = 1,
                    },
            },
    +       .num_consumer_supplies = ARRAY_SIZE(lp3974_ldo8_consumer),
    +       .consumer_supplies = lp3974_ldo8_consumer,
      };

      static struct regulator_init_data lp3974_ldo9_data = {
    @@ -472,6 +496,34 @@ static struct max8998_platform_data
    universal_lp3974_pdata = {
            .wakeup                 = true,
      };

    +static struct regulator_consumer_supply hdmi_fixed_consumer =
    +       REGULATOR_SUPPLY("hdmi-en", "exynos4-hdmi");
    +
    +static struct regulator_init_data hdmi_fixed_voltage_init_data = {
    +       .constraints            = {
    +               .name           = "HDMI_5V",
    +               .valid_ops_mask = REGULATOR_CHANGE_STATUS,
    +       },
    +       .num_consumer_supplies  = 1,
    +       .consumer_supplies      = &hdmi_fixed_consumer,
    +};
    +
    +static struct fixed_voltage_config hdmi_fixed_voltage_config = {
    +       .supply_name            = "HDMI_EN1",
    +       .microvolts             = 5000000,
    +       .gpio                   = EXYNOS4_GPE0(1),
    +       .enable_high            = true,
    +       .init_data              = &hdmi_fixed_voltage_init_data,
    +};
    +
    +static struct platform_device hdmi_fixed_voltage = {
    +       .name                   = "reg-fixed-voltage",
    +       .id                     = 6,
    +       .dev                    = {
    +               .platform_data  = &hdmi_fixed_voltage_config,
    +       },
    +};
    +
      /* GPIO I2C 5 (PMIC) */
      static struct i2c_board_info i2c5_devs[] __initdata = {
            {
    @@ -714,6 +766,12 @@ static struct platform_device
    *universal_devices[] __initdata = {
    &s3c_device_hsmmc3,
    &s3c_device_i2c3,
    &s3c_device_i2c5,
    + &s5p_device_i2c_hdmiphy,
    + &hdmi_fixed_voltage,
    + &exynos4_device_pd[PD_TV],
    + &s5p_device_hdmi,
    + &s5p_device_sdo,
    + &s5p_device_mixer,

            /* Universal Devices */
    &i2c_gpio12,
    @@ -732,6 +790,20 @@ static void __init universal_map_io(void)
            s3c24xx_init_uarts(universal_uartcfgs,
    ARRAY_SIZE(universal_uartcfgs));
      }

    +void s5p_tv_setup(void)
    +{
    +       /* direct HPD to HDMI chip */
    +       gpio_request(EXYNOS4_GPX3(7), "hpd-plug");
    +
    +       gpio_direction_input(EXYNOS4_GPX3(7));
    +       s3c_gpio_cfgpin(EXYNOS4_GPX3(7), S3C_GPIO_SFN(0x3));
    +       s3c_gpio_setpull(EXYNOS4_GPX3(7), S3C_GPIO_PULL_NONE);
    +
    +       /* setup dependencies between TV devices */
    +       s5p_device_hdmi.dev.parent = &exynos4_device_pd[PD_TV].dev;
    +       s5p_device_mixer.dev.parent = &exynos4_device_pd[PD_TV].dev;
    +}
    +
      static void __init universal_reserve(void)
      {
            s5p_mfc_reserve_mem(0x43000000, 8 << 20, 0x51000000, 8 << 20);
    @@ -740,6 +812,7 @@ static void __init universal_reserve(void)
      static void __init universal_machine_init(void)
      {
            universal_sdhci_init();
    +       s5p_tv_setup();

            i2c_register_board_info(0, i2c0_devs, ARRAY_SIZE(i2c0_devs));
            i2c_register_board_info(1, i2c1_devs, ARRAY_SIZE(i2c1_devs));
    @@ -749,6 +822,7 @@ static void __init universal_machine_init(void)
            i2c_register_board_info(3, i2c3_devs, ARRAY_SIZE(i2c3_devs));

            s3c_i2c5_set_platdata(NULL);
    +       s5p_i2c_hdmiphy_set_platdata(NULL);
            i2c_register_board_info(5, i2c5_devs, ARRAY_SIZE(i2c5_devs));

            universal_touchkey_init();
    --
    1.7.6

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--
With warm regards,
Sachin


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