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Date: Tue, 5 May 2015 09:17:35 +0100
From: Lee Jones <lee.jones@...aro.org>
To: Tony Lindgren <tony@...mide.com>
Cc: Samuel Ortiz <sameo@...ux.intel.com>, linux-kernel@...r.kernel.org,
linux-omap@...r.kernel.org
Subject: Re: [PATCH] mfd: twl4030-power: Fix pmic for boards that need AC
charger disabled
On Mon, 04 May 2015, Tony Lindgren wrote:
> * Tony Lindgren <tony@...mide.com> [150330 10:41]:
> > I noticed the PMIC configuration on 37xx-evm won't actually shut down
> > the voltages during off-idle. Turns out 37xx-evm needs the AC charger
> > state transitions disabled like we are doing for SDP and LDP in the
> > legacy booting case.
> >
> > Let's fix this for device tree based booting by setting up the quirk
> > flag based on the compatible flag. And let's also use the existing
> > define for STARTON_CHG.
> >
> > Note that SDP and EVM do not have the PMIC clken wired to gate the
> > the oscillator while LDP has.
>
> Looks like this fix is still pending?
Applied now, thanks.
> Seems to require a minor update for the const changes, updated
> version below.
>
> Regards,
>
> Tony
>
> 8< ------------------------
> From: Tony Lindgren <tony@...mide.com>
> Date: Mon, 27 Apr 2015 10:18:14 -0700
> Subject: [PATCH] mfd: twl4030-power: Fix pmic for boards that need AC charger
> disabled
>
> I noticed the PMIC configuration on 37xx-evm won't actually shut down
> the voltages during off-idle. Turns out 37xx-evm needs the AC charger
> state transitions disabled like we are doing for SDP and LDP in the
> legacy booting case.
>
> Let's fix this for device tree based booting by setting up the quirk
> flag based on the compatible flag. And let's also use the existing
> define for STARTON_CHG.
>
> Note that SDP and EVM do not have the PMIC clken wired to gate the
> the oscillator while LDP has.
>
> Signed-off-by: Tony Lindgren <tony@...mide.com>
>
> --- a/drivers/mfd/twl4030-power.c
> +++ b/drivers/mfd/twl4030-power.c
> @@ -264,7 +264,9 @@ out:
> return err;
> }
>
> -static int twl4030_config_wakeup12_sequence(u8 address)
> +static int
> +twl4030_config_wakeup12_sequence(const struct twl4030_power_data *pdata,
> + u8 address)
> {
> int err = 0;
> u8 data;
> @@ -293,13 +295,14 @@ static int twl4030_config_wakeup12_sequence(u8 address)
> if (err)
> goto out;
>
> - if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
> + if (pdata->ac_charger_quirk || machine_is_omap_3430sdp() ||
> + machine_is_omap_ldp()) {
> /* Disabling AC charger effect on sleep-active transitions */
> err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data,
> R_CFG_P1_TRANSITION);
> if (err)
> goto out;
> - data &= ~(1<<1);
> + data &= ~STARTON_CHG;
> err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data,
> R_CFG_P1_TRANSITION);
> if (err)
> @@ -459,8 +462,9 @@ static int twl4030_configure_resource(struct twl4030_resconfig *rconfig)
> return 0;
> }
>
> -static int load_twl4030_script(struct twl4030_script *tscript,
> - u8 address)
> +static int load_twl4030_script(const struct twl4030_power_data *pdata,
> + struct twl4030_script *tscript,
> + u8 address)
> {
> int err;
> static int order;
> @@ -487,7 +491,7 @@ static int load_twl4030_script(struct twl4030_script *tscript,
> if (err)
> goto out;
>
> - err = twl4030_config_wakeup12_sequence(address);
> + err = twl4030_config_wakeup12_sequence(pdata, address);
> if (err)
> goto out;
> order = 1;
> @@ -567,7 +571,7 @@ twl4030_power_configure_scripts(const struct twl4030_power_data *pdata)
> u8 address = twl4030_start_script_address;
>
> for (i = 0; i < pdata->num; i++) {
> - err = load_twl4030_script(pdata->scripts[i], address);
> + err = load_twl4030_script(pdata, pdata->scripts[i], address);
> if (err)
> return err;
> address += pdata->scripts[i]->size;
> @@ -829,6 +833,21 @@ static struct twl4030_power_data osc_off_idle = {
> .board_config = osc_off_rconfig,
> };
>
> +static struct twl4030_power_data omap3_idle_ac_quirk = {
> + .scripts = omap3_idle_scripts,
> + .num = ARRAY_SIZE(omap3_idle_scripts),
> + .resource_config = omap3_idle_rconfig,
> + .ac_charger_quirk = true,
> +};
> +
> +static struct twl4030_power_data omap3_idle_ac_quirk_osc_off = {
> + .scripts = omap3_idle_scripts,
> + .num = ARRAY_SIZE(omap3_idle_scripts),
> + .resource_config = omap3_idle_rconfig,
> + .board_config = osc_off_rconfig,
> + .ac_charger_quirk = true,
> +};
> +
> static const struct of_device_id twl4030_power_of_match[] = {
> {
> .compatible = "ti,twl4030-power",
> @@ -845,6 +864,18 @@ static const struct of_device_id twl4030_power_of_match[] = {
> .compatible = "ti,twl4030-power-idle-osc-off",
> .data = &osc_off_idle,
> },
> + {
> + .compatible = "ti,twl4030-power-omap3-sdp",
> + .data = &omap3_idle_ac_quirk,
> + },
> + {
> + .compatible = "ti,twl4030-power-omap3-ldp",
> + .data = &omap3_idle_ac_quirk_osc_off,
> + },
> + {
> + .compatible = "ti,twl4030-power-omap3-evm",
> + .data = &omap3_idle_ac_quirk,
> + },
> { },
> };
> MODULE_DEVICE_TABLE(of, twl4030_power_of_match);
> --- a/include/linux/i2c/twl.h
> +++ b/include/linux/i2c/twl.h
> @@ -675,6 +675,7 @@ struct twl4030_power_data {
> struct twl4030_resconfig *board_config;
> #define TWL4030_RESCONFIG_UNDEF ((u8)-1)
> bool use_poweroff; /* Board is wired for TWL poweroff */
> + bool ac_charger_quirk; /* Disable AC charger on board */
> };
>
> extern int twl4030_remove_script(u8 flags);
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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