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Message-ID: <20120827221532.GC2281@r65073-Latitude-D630>
Date: Tue, 28 Aug 2012 06:15:35 +0800
From: Shawn Guo <shawn.guo@...aro.org>
To: Dong Aisheng <b29396@...escale.com>
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linus.walleij@...ricsson.com, s.hauer@...gutronix.de,
kernel@...gutronix.de, grant.likely@...retlab.ca,
rob.herring@...xeda.com, sameo@...ux.intel.com, lrg@...com,
broonie@...nsource.wolfsonmicro.com, richard.zhao@...escale.com,
devicetree-discuss@...ts.ozlabs.org, swarren@...dotorg.org
Subject: Re: [PATCH v2 4/7] regulator: anatop-regulator: convert to use
syscon to access anatop register
On Mon, Aug 27, 2012 at 03:24:42PM +0800, Dong Aisheng wrote:
> From: Dong Aisheng <dong.aisheng@...aro.org>
>
> Using syscon to access anatop register.
>
> Acked-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
> Signed-off-by: Dong Aisheng <dong.aisheng@...aro.org>
> ---
> ChangeLog v1-v2:
> * update to use generic regmap api
> ---
> arch/arm/boot/dts/imx6q.dtsi | 6 ++++++
> drivers/regulator/Kconfig | 2 +-
> drivers/regulator/anatop-regulator.c | 25 +++++++++++++++----------
> 3 files changed, 22 insertions(+), 11 deletions(-)
>
> diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
> index db3fa15..da2bb71 100644
> --- a/arch/arm/boot/dts/imx6q.dtsi
> +++ b/arch/arm/boot/dts/imx6q.dtsi
> @@ -395,6 +395,7 @@
> anatop-min-bit-val = <4>;
> anatop-min-voltage = <800000>;
> anatop-max-voltage = <1375000>;
> + fsl,anatop = <&anatop>;
> };
>
> regulator-3p0@120 {
> @@ -409,6 +410,7 @@
> anatop-min-bit-val = <0>;
> anatop-min-voltage = <2625000>;
> anatop-max-voltage = <3400000>;
> + fsl,anatop = <&anatop>;
> };
>
> regulator-2p5@130 {
> @@ -423,6 +425,7 @@
> anatop-min-bit-val = <0>;
> anatop-min-voltage = <2000000>;
> anatop-max-voltage = <2750000>;
> + fsl,anatop = <&anatop>;
> };
>
> regulator-vddcore@140 {
> @@ -437,6 +440,7 @@
> anatop-min-bit-val = <1>;
> anatop-min-voltage = <725000>;
> anatop-max-voltage = <1450000>;
> + fsl,anatop = <&anatop>;
> };
>
> regulator-vddpu@140 {
> @@ -451,6 +455,7 @@
> anatop-min-bit-val = <1>;
> anatop-min-voltage = <725000>;
> anatop-max-voltage = <1450000>;
> + fsl,anatop = <&anatop>;
> };
>
> regulator-vddsoc@140 {
> @@ -465,6 +470,7 @@
> anatop-min-bit-val = <1>;
> anatop-min-voltage = <725000>;
> anatop-max-voltage = <1450000>;
> + fsl,anatop = <&anatop>;
> };
> };
>
> diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
> index 4e932cc..2ae1d97 100644
> --- a/drivers/regulator/Kconfig
> +++ b/drivers/regulator/Kconfig
> @@ -112,7 +112,7 @@ config REGULATOR_DA9052
>
> config REGULATOR_ANATOP
> tristate "Freescale i.MX on-chip ANATOP LDO regulators"
> - depends on MFD_ANATOP
> + depends on MFD_SYSCON
> help
> Say y here to support Freescale i.MX on-chip ANATOP LDOs
> regulators. It is recommended that this option be
> diff --git a/drivers/regulator/anatop-regulator.c b/drivers/regulator/anatop-regulator.c
> index ce0fe72..71586a7 100644
> --- a/drivers/regulator/anatop-regulator.c
> +++ b/drivers/regulator/anatop-regulator.c
> @@ -21,19 +21,20 @@
> #include <linux/slab.h>
> #include <linux/device.h>
> #include <linux/module.h>
> +#include <linux/mfd/syscon.h>
> #include <linux/err.h>
> #include <linux/io.h>
> #include <linux/platform_device.h>
> #include <linux/of.h>
> #include <linux/of_address.h>
> -#include <linux/mfd/anatop.h>
> +#include <linux/regmap.h>
> #include <linux/regulator/driver.h>
> #include <linux/regulator/of_regulator.h>
>
> struct anatop_regulator {
> const char *name;
> u32 control_reg;
> - struct anatop *mfd;
> + struct regmap *anatop;
> int vol_bit_shift;
> int vol_bit_width;
> int min_bit_val;
> @@ -43,7 +44,7 @@ struct anatop_regulator {
> struct regulator_init_data *initdata;
> };
>
> -static int anatop_set_voltage_sel(struct regulator_dev *reg, unsigned selector)
> +static int anatop_regmap_set_voltage_sel(struct regulator_dev *reg, unsigned selector)
> {
> struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
> u32 val, mask;
> @@ -56,12 +57,13 @@ static int anatop_set_voltage_sel(struct regulator_dev *reg, unsigned selector)
> mask = ((1 << anatop_reg->vol_bit_width) - 1) <<
> anatop_reg->vol_bit_shift;
> val <<= anatop_reg->vol_bit_shift;
> - anatop_write_reg(anatop_reg->mfd, anatop_reg->control_reg, val, mask);
> + regmap_update_bits(anatop_reg->anatop, anatop_reg->control_reg,
> + mask, val);
>
> return 0;
> }
>
> -static int anatop_get_voltage_sel(struct regulator_dev *reg)
> +static int anatop_regmap_get_voltage_sel(struct regulator_dev *reg)
> {
> struct anatop_regulator *anatop_reg = rdev_get_drvdata(reg);
> u32 val, mask;
> @@ -69,7 +71,7 @@ static int anatop_get_voltage_sel(struct regulator_dev *reg)
> if (!anatop_reg->control_reg)
> return -ENOTSUPP;
>
> - val = anatop_read_reg(anatop_reg->mfd, anatop_reg->control_reg);
> + regmap_read(anatop_reg->anatop, anatop_reg->control_reg, &val);
> mask = ((1 << anatop_reg->vol_bit_width) - 1) <<
> anatop_reg->vol_bit_shift;
> val = (val & mask) >> anatop_reg->vol_bit_shift;
> @@ -78,8 +80,8 @@ static int anatop_get_voltage_sel(struct regulator_dev *reg)
> }
>
> static struct regulator_ops anatop_rops = {
> - .set_voltage_sel = anatop_set_voltage_sel,
> - .get_voltage_sel = anatop_get_voltage_sel,
> + .set_voltage_sel = anatop_regmap_set_voltage_sel,
> + .get_voltage_sel = anatop_regmap_get_voltage_sel,
> .list_voltage = regulator_list_voltage_linear,
> .map_voltage = regulator_map_voltage_linear,
> };
> @@ -92,7 +94,6 @@ static int __devinit anatop_regulator_probe(struct platform_device *pdev)
> struct regulator_dev *rdev;
> struct anatop_regulator *sreg;
> struct regulator_init_data *initdata;
> - struct anatop *anatopmfd = dev_get_drvdata(pdev->dev.parent);
> struct regulator_config config = { };
> int ret = 0;
>
> @@ -109,7 +110,11 @@ static int __devinit anatop_regulator_probe(struct platform_device *pdev)
> rdesc->ops = &anatop_rops;
> rdesc->type = REGULATOR_VOLTAGE;
> rdesc->owner = THIS_MODULE;
> - sreg->mfd = anatopmfd;
> +
> + sreg->anatop = syscon_regmap_lookup_by_phandle(np, "fsl,anatop");
> + if (IS_ERR(sreg->anatop))
> + return PTR_ERR(sreg->anatop);
> +
All the anatop regulators are child nodes of anatop. It looks a little
odd to use phandle there. of_get_parent should just works.
> ret = of_property_read_u32(np, "anatop-reg-offset",
> &sreg->control_reg);
> if (ret) {
> --
> 1.7.0.4
>
>
--
Regards,
Shawn
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