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-rw-r--r--target/linux/mxs/patches-4.4/102-mxs-add-regulator-driver.patch570
1 files changed, 0 insertions, 570 deletions
diff --git a/target/linux/mxs/patches-4.4/102-mxs-add-regulator-driver.patch b/target/linux/mxs/patches-4.4/102-mxs-add-regulator-driver.patch
deleted file mode 100644
index b13fbdae32..0000000000
--- a/target/linux/mxs/patches-4.4/102-mxs-add-regulator-driver.patch
+++ /dev/null
@@ -1,570 +0,0 @@
---- a/drivers/regulator/Kconfig
-+++ b/drivers/regulator/Kconfig
-@@ -462,6 +462,14 @@ config REGULATOR_MT6397
- This driver supports the control of different power rails of device
- through regulator interface.
-
-+config REGULATOR_MXS
-+ tristate "Freescale MXS on-chip regulators"
-+ depends on (MXS_POWER || COMPILE_TEST)
-+ help
-+ Say y here to support Freescale MXS on-chip regulators.
-+ It is recommended that this option be enabled on i.MX23,
-+ i.MX28 platform.
-+
- config REGULATOR_PALMAS
- tristate "TI Palmas PMIC Regulators"
- depends on MFD_PALMAS
---- a/drivers/regulator/Makefile
-+++ b/drivers/regulator/Makefile
-@@ -61,6 +61,7 @@ obj-$(CONFIG_REGULATOR_MC13892) += mc138
- obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
- obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o
- obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o
-+obj-$(CONFIG_REGULATOR_MXS) += mxs-regulator.o
- obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
- obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o
- obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o
---- /dev/null
-+++ b/drivers/regulator/mxs-regulator.c
-@@ -0,0 +1,540 @@
-+/*
-+ * Freescale MXS on-chip regulators
-+ *
-+ * Embedded Alley Solutions, Inc <source@embeddedalley.com>
-+ *
-+ * Copyright (C) 2014 Stefan Wahren
-+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
-+ * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
-+ *
-+ * Inspired by imx-bootlets
-+ */
-+
-+/*
-+ * The code contained herein is licensed under the GNU General Public
-+ * License. You may obtain a copy of the GNU General Public License
-+ * Version 2 or later at the following locations:
-+ *
-+ * http://www.opensource.org/licenses/gpl-license.html
-+ * http://www.gnu.org/copyleft/gpl.html
-+ */
-+
-+#include <linux/delay.h>
-+#include <linux/device.h>
-+#include <linux/err.h>
-+#include <linux/kernel.h>
-+#include <linux/mfd/syscon.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/of_device.h>
-+#include <linux/platform_device.h>
-+#include <linux/regmap.h>
-+#include <linux/regulator/driver.h>
-+#include <linux/regulator/machine.h>
-+#include <linux/regulator/of_regulator.h>
-+#include <linux/slab.h>
-+
-+/* Powered by linear regulator. DCDC output is gated off and
-+ the linreg output is equal to the target. */
-+#define HW_POWER_LINREG_DCDC_OFF 1
-+
-+/* Powered by linear regulator. DCDC output is not gated off
-+ and is ready for the automatic hardware transistion after a 5V
-+ event. The converters are not enabled when 5V is present. LinReg output
-+ is 25mV below target. */
-+#define HW_POWER_LINREG_DCDC_READY 2
-+
-+/* Powered by DCDC converter and the LinReg is on. LinReg output
-+ is 25mV below target. */
-+#define HW_POWER_DCDC_LINREG_ON 3
-+
-+/* Powered by DCDC converter and the LinReg is off. LinReg output
-+ is 25mV below target. */
-+#define HW_POWER_DCDC_LINREG_OFF 4
-+
-+/* Powered by DCDC converter and the LinReg is ready for the
-+ automatic hardware transfer. The LinReg output is not enabled and
-+ depends on the 5V presence to enable the LinRegs. LinReg offset is 25mV
-+ below target. */
-+#define HW_POWER_DCDC_LINREG_READY 5
-+
-+/* Powered by an external source when 5V is present. This does not
-+ necessarily mean the external source is powered by 5V,but the chip needs
-+ to be aware that 5V is present. */
-+#define HW_POWER_EXTERNAL_SOURCE_5V 6
-+
-+/* Powered by an external source when 5V is not present.This doesn't
-+ necessarily mean the external source is powered by the battery, but the
-+ chip needs to be aware that the battery is present */
-+#define HW_POWER_EXTERNAL_SOURCE_BATTERY 7
-+
-+/* Unknown configuration. This is an error. */
-+#define HW_POWER_UNKNOWN_SOURCE 8
-+
-+/* TODO: Move power register offsets into header file */
-+#define HW_POWER_5VCTRL 0x00000010
-+#define HW_POWER_VDDDCTRL 0x00000040
-+#define HW_POWER_VDDACTRL 0x00000050
-+#define HW_POWER_VDDIOCTRL 0x00000060
-+#define HW_POWER_MISC 0x00000090
-+#define HW_POWER_STS 0x000000c0
-+
-+#define BM_POWER_STS_VBUSVALID0_STATUS BIT(15)
-+#define BM_POWER_STS_DC_OK BIT(9)
-+
-+#define BM_POWER_5VCTRL_ILIMIT_EQ_ZERO BIT(2)
-+#define BM_POWER_5VCTRL_ENABLE_DCDC BIT(0)
-+
-+#define BM_POWER_LINREG_OFFSET_DCDC_MODE BIT(1)
-+
-+#define SHIFT_FREQSEL 4
-+
-+#define BM_POWER_MISC_FREQSEL (7 << SHIFT_FREQSEL)
-+
-+/* Recommended DC-DC clock source values */
-+#define HW_POWER_MISC_FREQSEL_20000_KHZ 1
-+#define HW_POWER_MISC_FREQSEL_24000_KHZ 2
-+#define HW_POWER_MISC_FREQSEL_19200_KHZ 3
-+
-+#define HW_POWER_MISC_SEL_PLLCLK BIT(0)
-+
-+/* Regulator IDs */
-+#define MXS_DCDC 1
-+#define MXS_VDDIO 2
-+#define MXS_VDDA 3
-+#define MXS_VDDD 4
-+
-+struct mxs_reg_info {
-+ /* regulator descriptor */
-+ struct regulator_desc desc;
-+
-+ /* regulator control register */
-+ int ctrl_reg;
-+
-+ /* disable DC-DC output */
-+ unsigned int disable_fet_mask;
-+
-+ /* steps between linreg output and DC-DC target */
-+ unsigned int linreg_offset_mask;
-+ u8 linreg_offset_shift;
-+
-+ /* function which determine power source */
-+ u8 (*get_power_source)(struct regulator_dev *);
-+};
-+
-+static inline u8 get_linreg_offset(struct mxs_reg_info *ldo, u32 regs)
-+{
-+ return (regs & ldo->linreg_offset_mask) >> ldo->linreg_offset_shift;
-+}
-+
-+static u8 get_vddio_power_source(struct regulator_dev *reg)
-+{
-+ struct mxs_reg_info *ldo = rdev_get_drvdata(reg);
-+ u32 v5ctrl, status, base;
-+ u8 offset;
-+
-+ if (regmap_read(reg->regmap, HW_POWER_5VCTRL, &v5ctrl))
-+ return HW_POWER_UNKNOWN_SOURCE;
-+
-+ if (regmap_read(reg->regmap, HW_POWER_STS, &status))
-+ return HW_POWER_UNKNOWN_SOURCE;
-+
-+ if (regmap_read(reg->regmap, ldo->ctrl_reg, &base))
-+ return HW_POWER_UNKNOWN_SOURCE;
-+
-+ offset = get_linreg_offset(ldo, base);
-+
-+ /* If VBUS valid then 5 V power supply present */
-+ if (status & BM_POWER_STS_VBUSVALID0_STATUS) {
-+ /* Powered by Linreg, DC-DC is off */
-+ if ((base & ldo->disable_fet_mask) &&
-+ !(offset & BM_POWER_LINREG_OFFSET_DCDC_MODE)) {
-+ return HW_POWER_LINREG_DCDC_OFF;
-+ }
-+
-+ if (v5ctrl & BM_POWER_5VCTRL_ENABLE_DCDC) {
-+ /* Powered by DC-DC, Linreg is on */
-+ if (offset & BM_POWER_LINREG_OFFSET_DCDC_MODE)
-+ return HW_POWER_DCDC_LINREG_ON;
-+ } else {
-+ /* Powered by Linreg, DC-DC is off */
-+ if (!(offset & BM_POWER_LINREG_OFFSET_DCDC_MODE))
-+ return HW_POWER_LINREG_DCDC_OFF;
-+ }
-+ } else {
-+ /* Powered by DC-DC, Linreg is on */
-+ if (offset & BM_POWER_LINREG_OFFSET_DCDC_MODE)
-+ return HW_POWER_DCDC_LINREG_ON;
-+ }
-+
-+ return HW_POWER_UNKNOWN_SOURCE;
-+}
-+
-+static u8 get_vdda_vddd_power_source(struct regulator_dev *reg)
-+{
-+ struct mxs_reg_info *ldo = rdev_get_drvdata(reg);
-+ struct regulator_desc *desc = &ldo->desc;
-+ u32 v5ctrl, status, base;
-+ u8 offset;
-+
-+ if (regmap_read(reg->regmap, HW_POWER_5VCTRL, &v5ctrl))
-+ return HW_POWER_UNKNOWN_SOURCE;
-+
-+ if (regmap_read(reg->regmap, HW_POWER_STS, &status))
-+ return HW_POWER_UNKNOWN_SOURCE;
-+
-+ if (regmap_read(reg->regmap, ldo->ctrl_reg, &base))
-+ return HW_POWER_UNKNOWN_SOURCE;
-+
-+ offset = get_linreg_offset(ldo, base);
-+
-+ /* DC-DC output is disabled */
-+ if (base & ldo->disable_fet_mask) {
-+ /* Powered by 5 V supply */
-+ if (status & BM_POWER_STS_VBUSVALID0_STATUS)
-+ return HW_POWER_EXTERNAL_SOURCE_5V;
-+
-+ /* Powered by Linreg, DC-DC is off */
-+ if (!(offset & BM_POWER_LINREG_OFFSET_DCDC_MODE))
-+ return HW_POWER_LINREG_DCDC_OFF;
-+ }
-+
-+ /* If VBUS valid then 5 V power supply present */
-+ if (status & BM_POWER_STS_VBUSVALID0_STATUS) {
-+ /* Powered by DC-DC, Linreg is on */
-+ if (v5ctrl & BM_POWER_5VCTRL_ENABLE_DCDC)
-+ return HW_POWER_DCDC_LINREG_ON;
-+
-+ /* Powered by Linreg, DC-DC is off */
-+ return HW_POWER_LINREG_DCDC_OFF;
-+ }
-+
-+ /* DC-DC is on */
-+ if (offset & BM_POWER_LINREG_OFFSET_DCDC_MODE) {
-+ /* Powered by DC-DC, Linreg is on */
-+ if (base & desc->enable_mask)
-+ return HW_POWER_DCDC_LINREG_ON;
-+
-+ /* Powered by DC-DC, Linreg is off */
-+ return HW_POWER_DCDC_LINREG_OFF;
-+ }
-+
-+ return HW_POWER_UNKNOWN_SOURCE;
-+}
-+
-+static int mxs_set_dcdc_freq(struct regulator_dev *reg, u32 hz)
-+{
-+ struct mxs_reg_info *dcdc = rdev_get_drvdata(reg);
-+ u32 val;
-+ int ret;
-+
-+ if (dcdc->desc.id != MXS_DCDC) {
-+ dev_warn(&reg->dev, "Setting switching freq is not supported\n");
-+ return -EINVAL;
-+ }
-+
-+ ret = regmap_read(reg->regmap, HW_POWER_MISC, &val);
-+ if (ret)
-+ return ret;
-+
-+ val &= ~BM_POWER_MISC_FREQSEL;
-+ val &= ~HW_POWER_MISC_SEL_PLLCLK;
-+
-+ /*
-+ * Select the PLL/PFD based frequency that the DC-DC converter uses.
-+ * The actual switching frequency driving the power inductor is
-+ * DCDC_CLK/16. Accept only values recommend by Freescale.
-+ */
-+ switch (hz) {
-+ case 1200000:
-+ val |= HW_POWER_MISC_FREQSEL_19200_KHZ << SHIFT_FREQSEL;
-+ break;
-+ case 1250000:
-+ val |= HW_POWER_MISC_FREQSEL_20000_KHZ << SHIFT_FREQSEL;
-+ break;
-+ case 1500000:
-+ val |= HW_POWER_MISC_FREQSEL_24000_KHZ << SHIFT_FREQSEL;
-+ break;
-+ default:
-+ dev_warn(&reg->dev, "Switching freq: %u Hz not supported\n",
-+ hz);
-+ return -EINVAL;
-+ }
-+
-+ /* First program FREQSEL */
-+ ret = regmap_write(reg->regmap, HW_POWER_MISC, val);
-+ if (ret)
-+ return ret;
-+
-+ /* then set PLL as clock for DC-DC converter */
-+ val |= HW_POWER_MISC_SEL_PLLCLK;
-+
-+ return regmap_write(reg->regmap, HW_POWER_MISC, val);
-+}
-+
-+static int mxs_ldo_set_voltage_sel(struct regulator_dev *reg, unsigned sel)
-+{
-+ struct mxs_reg_info *ldo = rdev_get_drvdata(reg);
-+ struct regulator_desc *desc = &ldo->desc;
-+ u32 status = 0;
-+ int timeout;
-+ int ret;
-+
-+ ret = regmap_update_bits(reg->regmap, desc->vsel_reg, desc->vsel_mask,
-+ sel);
-+ if (ret)
-+ return ret;
-+
-+ if (ldo->get_power_source) {
-+ switch (ldo->get_power_source(reg)) {
-+ case HW_POWER_LINREG_DCDC_OFF:
-+ case HW_POWER_LINREG_DCDC_READY:
-+ case HW_POWER_EXTERNAL_SOURCE_5V:
-+ /*
-+ * Since the DC-DC converter is off we can't
-+ * trigger on DC_OK. So wait at least 1 ms
-+ * for stabilization.
-+ */
-+ usleep_range(1000, 2000);
-+ return 0;
-+ }
-+ }
-+
-+ /* Make sure DC_OK has changed */
-+ usleep_range(15, 20);
-+
-+ for (timeout = 0; timeout < 20; timeout++) {
-+ ret = regmap_read(reg->regmap, HW_POWER_STS, &status);
-+
-+ if (ret)
-+ break;
-+
-+ /* DC-DC converter control loop has stabilized */
-+ if (status & BM_POWER_STS_DC_OK)
-+ return 0;
-+
-+ udelay(1);
-+ }
-+
-+ if (!ret)
-+ dev_warn_ratelimited(&reg->dev, "%s: timeout status=0x%08x\n",
-+ __func__, status);
-+
-+ msleep(20);
-+
-+ return -ETIMEDOUT;
-+}
-+
-+static int mxs_ldo_is_enabled(struct regulator_dev *reg)
-+{
-+ struct mxs_reg_info *ldo = rdev_get_drvdata(reg);
-+
-+ if (ldo->get_power_source) {
-+ switch (ldo->get_power_source(reg)) {
-+ case HW_POWER_LINREG_DCDC_OFF:
-+ case HW_POWER_LINREG_DCDC_READY:
-+ case HW_POWER_DCDC_LINREG_ON:
-+ return 1;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+static struct regulator_ops mxs_dcdc_ops = {
-+ .is_enabled = regulator_is_enabled_regmap,
-+};
-+
-+static struct regulator_ops mxs_ldo_ops = {
-+ .list_voltage = regulator_list_voltage_linear,
-+ .map_voltage = regulator_map_voltage_linear,
-+ .set_voltage_sel = mxs_ldo_set_voltage_sel,
-+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
-+ .is_enabled = mxs_ldo_is_enabled,
-+};
-+
-+static const struct mxs_reg_info mxs_info_dcdc = {
-+ .desc = {
-+ .name = "dcdc",
-+ .id = MXS_DCDC,
-+ .type = REGULATOR_VOLTAGE,
-+ .owner = THIS_MODULE,
-+ .ops = &mxs_dcdc_ops,
-+ .enable_reg = HW_POWER_STS,
-+ .enable_mask = (1 << 0),
-+ },
-+};
-+
-+static const struct mxs_reg_info imx23_info_vddio = {
-+ .desc = {
-+ .name = "vddio",
-+ .id = MXS_VDDIO,
-+ .type = REGULATOR_VOLTAGE,
-+ .owner = THIS_MODULE,
-+ .n_voltages = 0x20,
-+ .uV_step = 25000,
-+ .linear_min_sel = 0,
-+ .min_uV = 2800000,
-+ .vsel_reg = HW_POWER_VDDIOCTRL,
-+ .vsel_mask = 0x1f,
-+ .ops = &mxs_ldo_ops,
-+ },
-+ .ctrl_reg = HW_POWER_VDDIOCTRL,
-+ .disable_fet_mask = 1 << 16,
-+ .linreg_offset_mask = 3 << 12,
-+ .linreg_offset_shift = 12,
-+ .get_power_source = get_vddio_power_source,
-+};
-+
-+static const struct mxs_reg_info imx28_info_vddio = {
-+ .desc = {
-+ .name = "vddio",
-+ .id = MXS_VDDIO,
-+ .type = REGULATOR_VOLTAGE,
-+ .owner = THIS_MODULE,
-+ .n_voltages = 0x11,
-+ .uV_step = 50000,
-+ .linear_min_sel = 0,
-+ .min_uV = 2800000,
-+ .vsel_reg = HW_POWER_VDDIOCTRL,
-+ .vsel_mask = 0x1f,
-+ .ops = &mxs_ldo_ops,
-+ },
-+ .ctrl_reg = HW_POWER_VDDIOCTRL,
-+ .disable_fet_mask = 1 << 16,
-+ .linreg_offset_mask = 3 << 12,
-+ .linreg_offset_shift = 12,
-+ .get_power_source = get_vddio_power_source,
-+};
-+
-+static const struct mxs_reg_info mxs_info_vdda = {
-+ .desc = {
-+ .name = "vdda",
-+ .id = MXS_VDDA,
-+ .type = REGULATOR_VOLTAGE,
-+ .owner = THIS_MODULE,
-+ .n_voltages = 0x20,
-+ .uV_step = 25000,
-+ .linear_min_sel = 0,
-+ .min_uV = 1500000,
-+ .vsel_reg = HW_POWER_VDDACTRL,
-+ .vsel_mask = 0x1f,
-+ .ops = &mxs_ldo_ops,
-+ .enable_mask = (1 << 17),
-+ },
-+ .ctrl_reg = HW_POWER_VDDACTRL,
-+ .disable_fet_mask = 1 << 16,
-+ .linreg_offset_mask = 3 << 12,
-+ .linreg_offset_shift = 12,
-+ .get_power_source = get_vdda_vddd_power_source,
-+};
-+
-+static const struct mxs_reg_info mxs_info_vddd = {
-+ .desc = {
-+ .name = "vddd",
-+ .id = MXS_VDDD,
-+ .type = REGULATOR_VOLTAGE,
-+ .owner = THIS_MODULE,
-+ .n_voltages = 0x20,
-+ .uV_step = 25000,
-+ .linear_min_sel = 0,
-+ .min_uV = 800000,
-+ .vsel_reg = HW_POWER_VDDDCTRL,
-+ .vsel_mask = 0x1f,
-+ .ops = &mxs_ldo_ops,
-+ .enable_mask = (1 << 21),
-+ },
-+ .ctrl_reg = HW_POWER_VDDDCTRL,
-+ .disable_fet_mask = 1 << 20,
-+ .linreg_offset_mask = 3 << 16,
-+ .linreg_offset_shift = 16,
-+ .get_power_source = get_vdda_vddd_power_source,
-+};
-+
-+static const struct of_device_id of_mxs_regulator_match[] = {
-+ { .compatible = "fsl,imx23-dcdc", .data = &mxs_info_dcdc },
-+ { .compatible = "fsl,imx28-dcdc", .data = &mxs_info_dcdc },
-+ { .compatible = "fsl,imx23-vddio", .data = &imx23_info_vddio },
-+ { .compatible = "fsl,imx23-vdda", .data = &mxs_info_vdda },
-+ { .compatible = "fsl,imx23-vddd", .data = &mxs_info_vddd },
-+ { .compatible = "fsl,imx28-vddio", .data = &imx28_info_vddio },
-+ { .compatible = "fsl,imx28-vdda", .data = &mxs_info_vdda },
-+ { .compatible = "fsl,imx28-vddd", .data = &mxs_info_vddd },
-+ { /* end */ }
-+};
-+MODULE_DEVICE_TABLE(of, of_mxs_regulator_match);
-+
-+static int mxs_regulator_probe(struct platform_device *pdev)
-+{
-+ struct device *dev = &pdev->dev;
-+ const struct of_device_id *match;
-+ struct device_node *parent_np;
-+ struct regulator_dev *rdev = NULL;
-+ struct mxs_reg_info *info;
-+ struct regulator_init_data *initdata;
-+ struct regulator_config config = { };
-+ u32 switch_freq;
-+
-+ match = of_match_device(of_mxs_regulator_match, dev);
-+ if (!match) {
-+ /* We do not expect this to happen */
-+ dev_err(dev, "%s: Unable to match device\n", __func__);
-+ return -ENODEV;
-+ }
-+
-+ info = devm_kmemdup(dev, match->data, sizeof(struct mxs_reg_info),
-+ GFP_KERNEL);
-+ if (!info)
-+ return -ENOMEM;
-+
-+ initdata = of_get_regulator_init_data(dev, dev->of_node, &info->desc);
-+ if (!initdata) {
-+ dev_err(dev, "missing regulator init data\n");
-+ return -EINVAL;
-+ }
-+
-+ parent_np = of_get_parent(dev->of_node);
-+ if (!parent_np)
-+ return -ENODEV;
-+ config.regmap = syscon_node_to_regmap(parent_np);
-+ of_node_put(parent_np);
-+ if (IS_ERR(config.regmap))
-+ return PTR_ERR(config.regmap);
-+
-+ config.dev = dev;
-+ config.init_data = initdata;
-+ config.driver_data = info;
-+ config.of_node = dev->of_node;
-+
-+ rdev = devm_regulator_register(dev, &info->desc, &config);
-+ if (IS_ERR(rdev)) {
-+ int ret = PTR_ERR(rdev);
-+
-+ dev_err(dev, "%s: failed to register regulator(%d)\n",
-+ __func__, ret);
-+ return ret;
-+ }
-+
-+ if (!of_property_read_u32(dev->of_node, "switching-frequency",
-+ &switch_freq))
-+ mxs_set_dcdc_freq(rdev, switch_freq);
-+
-+ platform_set_drvdata(pdev, rdev);
-+
-+ return 0;
-+}
-+
-+static struct platform_driver mxs_regulator_driver = {
-+ .driver = {
-+ .name = "mxs_regulator",
-+ .of_match_table = of_mxs_regulator_match,
-+ },
-+ .probe = mxs_regulator_probe,
-+};
-+
-+module_platform_driver(mxs_regulator_driver);
-+
-+MODULE_AUTHOR("Stefan Wahren <stefan.wahren@i2se.com>");
-+MODULE_DESCRIPTION("Freescale MXS regulators");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS("platform:mxs_regulator");
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 08:10:21 +0000