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Date: Wed, 27 Apr 2011 13:40:02 +0300
From: Felipe Balbi <balbi@...com>
To: Graeme Gregory <gg@...mlogic.co.uk>
Cc: linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
sameo@...ux.intel.com, balbi@...com, lrg@...mlogic.co.uk,
broonie@...nsource.wolfsonmicro.com
Subject: Re: [PATCH 1/4] MFD: TWL6025: add phoenix lite support to twl6030
On Wed, Apr 27, 2011 at 10:39:48AM +0100, Graeme Gregory wrote:
> Phoenix Lite is based on the twl6030 family of PMICs. It has mostly the
> same feature set of twl6030 but with small changes. The codec block has
> also been removed. It also has a new charger block and new features in
> its ADC block. VUSB handling also differs.
>
> Signed-off-by: Graeme Gregory <gg@...mlogic.co.uk>
> ---
> drivers/mfd/twl-core.c | 103 ++++++++++++++++++++++++++++++++++++++++++-----
> include/linux/i2c/twl.h | 38 +++++++++++++++++-
> 2 files changed, 130 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
> index 960b5be..6b9562a 100644
> --- a/drivers/mfd/twl-core.c
> +++ b/drivers/mfd/twl-core.c
> @@ -198,6 +198,7 @@
> #define TWL6030_BASEADD_GASGAUGE 0x00C0
> #define TWL6030_BASEADD_PIH 0x00D0
> #define TWL6030_BASEADD_CHARGER 0x00E0
> +#define TWL6025_BASEADD_CHARGER 0x00DA
>
> /* subchip/slave 2 0x4A - DFT */
> #define TWL6030_BASEADD_DIEID 0x00C0
> @@ -236,6 +237,17 @@ unsigned int twl_rev(void)
> }
> EXPORT_SYMBOL(twl_rev);
>
> +/* Export a function so child drivers of this mfd can tell which subclass
> + * of the chip is being used. eg regulator needs to know that it is a
> + * 6025 variant.
> + */
> +static unsigned int twl_feat;
> +unsigned int twl_features(void)
> +{
> + return twl_feat;
> +}
> +EXPORT_SYMBOL(twl_features);
Why do you need other parts of the stack to access features ? It would
be better to use features to initialize proper fields in the TWL
structure and use that for runtime checking.
> @@ -328,6 +340,7 @@ static struct twl_mapping twl6030_map[] = {
>
> { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
> { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
> + { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
> };
>
> /*----------------------------------------------------------------------*/
> @@ -685,9 +698,8 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features)
> }
> if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
>
> - static struct regulator_consumer_supply usb3v3 = {
> - .supply = "vusb",
> - };
> + static struct regulator_consumer_supply usb3v3;
> + int regulator;
>
> if (twl_has_regulator()) {
> /* this is a template that gets copied */
> @@ -700,8 +712,15 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features)
> | REGULATOR_CHANGE_STATUS,
> };
>
> - child = add_regulator_linked(TWL6030_REG_VUSB,
> - &usb_fixed, &usb3v3, 1);
> + if (features & TWL6025_SUBCLASS) {
> + usb3v3.supply = "ldousb";
> + regulator = TWL6025_REG_LDOUSB;
> + } else {
> + usb3v3.supply = "vusb";
> + regulator = TWL6030_REG_VUSB;
> + }
that's just a name. Why don't you use the same name for both variants ?
> @@ -718,7 +737,15 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features)
> /* we need to connect regulators to this transceiver */
> if (twl_has_regulator() && child)
> usb3v3.dev = child;
> + } else if (twl_has_regulator() && twl_class_is_6030()) {
> + if (features & TWL6025_SUBCLASS)
> + child = add_regulator(TWL6025_REG_LDOUSB,
> + pdata->ldousb);
> + else
> + child = add_regulator(TWL6030_REG_VUSB, pdata->vusb);
see, then you need to add more fields to the platform_data structure
just because of a string.
> @@ -1093,6 +1173,8 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
> twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
> }
>
> + twl_feat = id->driver_data;
NACK. Avoid globals as much as possible.
> diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
> index 0c0d1ae..f85f0ed 100644
> --- a/include/linux/i2c/twl.h
> +++ b/include/linux/i2c/twl.h
> @@ -698,7 +703,21 @@ struct twl4030_platform_data {
> struct regulator_init_data *vana;
> struct regulator_init_data *vcxio;
> struct regulator_init_data *vusb;
> - struct regulator_init_data *clk32kg;
> + struct regulator_init_data *clk32kg;
here you converted TABs into spaces. Fix it.
> + /* TWL6025 LDO regulators */
> + struct regulator_init_data *ldo1;
> + struct regulator_init_data *ldo2;
> + struct regulator_init_data *ldo3;
> + struct regulator_init_data *ldo4;
> + struct regulator_init_data *ldo5;
> + struct regulator_init_data *ldo6;
> + struct regulator_init_data *ldo7;
> + struct regulator_init_data *ldoln;
> + struct regulator_init_data *ldousb;
> + /* TWL6025 DCDC regulators */
> + struct regulator_init_data *smps3;
> + struct regulator_init_data *smps4;
> + struct regulator_init_data *vio6025;
this is just becoming really really ugly. You need a more clever way of
handling this. Maybe passing an array of regulators and the array size
instead of continuously adding fields to this structure.
> @@ -780,4 +799,21 @@ static inline int twl4030charger_usb_en(int enable) { return 0; }
> #define TWL6030_REG_VRTC 47
> #define TWL6030_REG_CLK32KG 48
>
> +/* LDOs on 6025 have different names */
> +#define TWL6025_REG_LDO2 49
> +#define TWL6025_REG_LDO4 50
> +#define TWL6025_REG_LDO3 51
> +#define TWL6025_REG_LDO5 52
> +#define TWL6025_REG_LDO1 53
> +#define TWL6025_REG_LDO7 54
> +#define TWL6025_REG_LDO6 55
> +#define TWL6025_REG_LDOLN 56
> +#define TWL6025_REG_LDOUSB 57
> +
> +/* 6025 DCDC supplies */
> +#define TWL6025_REG_SMPS3 58
> +#define TWL6025_REG_SMPS4 59
> +#define TWL6025_REG_VIO 60
> +
> +
one blank line only.
--
balbi
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