From: Balaji T K <balajitk@ti.com>
To: linux-omap@vger.kernel.org, bcousson@baylibre.com,
devicetree@vger.kernel.org, linux-mmc@vger.kernel.org,
cjb@laptop.org, broonie@kernel.org
Cc: tony@atomide.com, Balaji T K <balajitk@ti.com>
Subject: [PATCH v6 3/7] regulator: add pbias regulator support
Date: Thu, 19 Dec 2013 18:08:36 +0530 [thread overview]
Message-ID: <1387456720-7202-4-git-send-email-balajitk@ti.com> (raw)
In-Reply-To: <1387456720-7202-1-git-send-email-balajitk@ti.com>
pbias register controls internal power supply to sd card i/o pads
in most OMAPs (OMAP2-5, DRA7).
Control bits for selecting voltage level and
enabling/disabling are in the same PBIAS register.
Signed-off-by: Balaji T K <balajitk@ti.com>
---
Add support for sim pbias and get pbias register offset via
standard reg property
.../bindings/regulator/pbias-regulator.txt | 17 ++
drivers/regulator/Kconfig | 9 +
drivers/regulator/Makefile | 1 +
drivers/regulator/pbias-regulator.c | 255 ++++++++++++++++++++
4 files changed, 282 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/regulator/pbias-regulator.txt
create mode 100644 drivers/regulator/pbias-regulator.c
diff --git a/Documentation/devicetree/bindings/regulator/pbias-regulator.txt b/Documentation/devicetree/bindings/regulator/pbias-regulator.txt
new file mode 100644
index 0000000..64352c1
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/pbias-regulator.txt
@@ -0,0 +1,17 @@
+PBIAS internal regulator for SD card dual voltage i/o pads on OMAP SoCs.
+
+Required properties:
+- compatible:
+ - "ti,pbias-omap" for OMAP2, OMAP3, OMAP4, OMAP5, DRA7
+
+Optional properties:
+- Any optional property defined in bindings/regulator/regulator.txt
+
+Example:
+
+ pbias_regulator: pbias_regulator {
+ regulator-name = "pbias_mmc_omap4";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3000000>;
+ regulator-enable-ramp-delay = <100>;
+ };
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index ce785f4..741e8fb 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -369,6 +369,15 @@ config REGULATOR_PALMAS
on the muxing. This is handled automatically in the driver by
reading the mux info from OTP.
+config REGULATOR_PBIAS
+ tristate "PBIAS OMAP regulator driver"
+ depends on (ARCH_OMAP || COMPILE_TEST) && MFD_SYSCON
+ help
+ Say y here to support pbias regulator for mmc1:SD card i/o
+ on OMAP SoCs.
+ This driver provides support for OMAP pbias modelled
+ regulators.
+
config REGULATOR_PCAP
tristate "Motorola PCAP2 regulator driver"
depends on EZX_PCAP
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 01c597e..16000fa 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o
obj-$(CONFIG_REGULATOR_TPS51632) += tps51632-regulator.o
+obj-$(CONFIG_REGULATOR_PBIAS) += pbias-regulator.o
obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o
diff --git a/drivers/regulator/pbias-regulator.c b/drivers/regulator/pbias-regulator.c
new file mode 100644
index 0000000..42883a0
--- /dev/null
+++ b/drivers/regulator/pbias-regulator.c
@@ -0,0 +1,255 @@
+/*
+ * pbias-regulator.c
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+ * Author: Balaji T K <balajitk@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+struct pbias_reg_info {
+ u32 enable;
+ u32 enable_mask;
+ u32 vmode;
+ char *name;
+};
+
+struct pbias_regulator_data {
+ struct regulator_desc desc;
+ void __iomem *pbias_addr;
+ unsigned int pbias_reg;
+ struct regulator_dev *dev;
+ struct regmap *syscon;
+ const struct pbias_reg_info *info;
+ int voltage;
+};
+
+static int pbias_regulator_set_voltage(struct regulator_dev *dev,
+ int min_uV, int max_uV, unsigned *selector)
+{
+ struct pbias_regulator_data *data = rdev_get_drvdata(dev);
+ const struct pbias_reg_info *info = data->info;
+ int ret, vmode;
+
+ if (min_uV <= 1800000)
+ vmode = 0;
+ else if (min_uV > 1800000)
+ vmode = info->vmode;
+
+ ret = regmap_update_bits(data->syscon, data->pbias_reg,
+ info->vmode, vmode);
+
+ return ret;
+}
+
+static int pbias_regulator_get_voltage(struct regulator_dev *rdev)
+{
+ struct pbias_regulator_data *data = rdev_get_drvdata(rdev);
+ const struct pbias_reg_info *info = data->info;
+ int value, voltage;
+
+ regmap_read(data->syscon, data->pbias_reg, &value);
+ value &= info->vmode;
+
+ voltage = value ? 3000000 : 1800000;
+
+ return voltage;
+}
+
+static int pbias_regulator_enable(struct regulator_dev *rdev)
+{
+ struct pbias_regulator_data *data = rdev_get_drvdata(rdev);
+ const struct pbias_reg_info *info = data->info;
+ int ret;
+
+ ret = regmap_update_bits(data->syscon, data->pbias_reg,
+ info->enable_mask, info->enable);
+
+ return ret;
+}
+
+static int pbias_regulator_disable(struct regulator_dev *rdev)
+{
+ struct pbias_regulator_data *data = rdev_get_drvdata(rdev);
+ const struct pbias_reg_info *info = data->info;
+ int ret;
+
+ ret = regmap_update_bits(data->syscon, data->pbias_reg,
+ info->enable_mask, 0);
+ return ret;
+}
+
+static int pbias_regulator_is_enable(struct regulator_dev *rdev)
+{
+ struct pbias_regulator_data *data = rdev_get_drvdata(rdev);
+ const struct pbias_reg_info *info = data->info;
+ int value;
+
+ regmap_read(data->syscon, data->pbias_reg, &value);
+
+ return (value & info->enable_mask) == info->enable_mask;
+}
+
+static struct regulator_ops pbias_regulator_voltage_ops = {
+ .set_voltage = pbias_regulator_set_voltage,
+ .get_voltage = pbias_regulator_get_voltage,
+ .enable = pbias_regulator_enable,
+ .disable = pbias_regulator_disable,
+ .is_enabled = pbias_regulator_is_enable,
+};
+
+static const struct pbias_reg_info pbias_mmc_omap3 = {
+ .enable = BIT(1),
+ .enable_mask = BIT(1),
+ .vmode = BIT(0),
+ .name = "pbias_mmc_omap3"
+};
+
+static const struct pbias_reg_info pbias_sim_omap3 = {
+ .enable = BIT(9),
+ .enable_mask = BIT(9),
+ .vmode = BIT(8),
+ .name = "pbias_sim_omap3"
+};
+
+static const struct pbias_reg_info pbias_mmc_omap4 = {
+ .enable = BIT(26) | BIT(22),
+ .enable_mask = BIT(26) | BIT(25) | BIT(22),
+ .vmode = BIT(21),
+ .name = "pbias_mmc_omap4"
+};
+
+static const struct pbias_reg_info pbias_mmc_omap5 = {
+ .enable = BIT(27) | BIT(26),
+ .enable_mask = BIT(27) | BIT(25) | BIT(26),
+ .vmode = BIT(21),
+ .name = "pbias_mmc_omap5"
+};
+
+static struct of_regulator_match pbias_matches[] = {
+ { .name = "pbias_mmc_omap3", .driver_data = (void *)&pbias_mmc_omap3},
+ { .name = "pbias_sim_omap3", .driver_data = (void *)&pbias_sim_omap3},
+ { .name = "pbias_mmc_omap4", .driver_data = (void *)&pbias_mmc_omap4},
+ { .name = "pbias_mmc_omap5", .driver_data = (void *)&pbias_mmc_omap5},
+};
+#define PBIAS_NUM_REGS ARRAY_SIZE(pbias_matches)
+
+static const struct of_device_id pbias_of_match[] = {
+ { .compatible = "ti,pbias-omap", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, pbias_of_match);
+
+static int pbias_regulator_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *dev_node;
+ struct pbias_regulator_data *drvdata;
+ struct resource *res;
+ struct regulator_config cfg = { };
+ struct regmap *syscon;
+ const struct pbias_reg_info *info;
+ int ret = 0;
+ int count, idx, data_idx = 0;
+
+ count = of_regulator_match(&pdev->dev, np, pbias_matches,
+ PBIAS_NUM_REGS);
+ if (count < 0)
+ return count;
+
+ drvdata = devm_kzalloc(&pdev->dev, sizeof(struct pbias_regulator_data)
+ * count, GFP_KERNEL);
+ if (drvdata == NULL) {
+ dev_err(&pdev->dev, "Failed to allocate device data\n");
+ return -ENOMEM;
+ }
+
+ dev_node = of_get_parent(np);
+ if (!dev_node)
+ return -ENODEV;
+
+ syscon = syscon_node_to_regmap(dev_node);
+ of_node_put(dev_node);
+ if (IS_ERR(syscon))
+ return PTR_ERR(syscon);
+
+ cfg.dev = &pdev->dev;
+
+ for (idx = 0; idx < PBIAS_NUM_REGS, data_idx < count; idx++) {
+ if (!pbias_matches[idx].init_data ||
+ !pbias_matches[idx].of_node)
+ continue;
+
+ info = pbias_matches[idx].driver_data;
+ if (!info)
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -EINVAL;
+
+ drvdata[data_idx].pbias_reg = res->start;
+ drvdata[data_idx].syscon = syscon;
+ drvdata[data_idx].info = info;
+ drvdata[data_idx].desc.name = info->name;
+ drvdata[data_idx].desc.owner = THIS_MODULE;
+ drvdata[data_idx].desc.type = REGULATOR_VOLTAGE;
+ drvdata[data_idx].desc.ops = &pbias_regulator_voltage_ops;
+ drvdata[data_idx].desc.n_voltages = 2;
+
+ cfg.init_data = pbias_matches[idx].init_data;
+ cfg.driver_data = &drvdata[data_idx];
+ cfg.of_node = pbias_matches[idx].of_node;
+
+ drvdata[data_idx].dev = devm_regulator_register(&pdev->dev,
+ &drvdata[data_idx].desc, &cfg);
+ if (IS_ERR(drvdata[data_idx].dev)) {
+ ret = PTR_ERR(drvdata[data_idx].dev);
+ dev_err(&pdev->dev,
+ "Failed to register regulator: %d\n", ret);
+ goto err_regulator;
+ }
+ data_idx++;
+ }
+
+ platform_set_drvdata(pdev, drvdata);
+
+err_regulator:
+ return ret;
+}
+
+static struct platform_driver pbias_regulator_driver = {
+ .probe = pbias_regulator_probe,
+ .driver = {
+ .name = "pbias-regulator",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(pbias_of_match),
+ },
+};
+
+module_platform_driver(pbias_regulator_driver);
+
+MODULE_AUTHOR("Balaji T K <balajitk@ti.com>");
+MODULE_DESCRIPTION("pbias voltage regulator");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pbias-regulator");
--
1.7.5.4
next prev parent reply other threads:[~2013-12-19 12:38 UTC|newest]
Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-30 14:03 [PATCH 00/13] mmc: omap_hsmmc: dt pbias and regulator voltage switch Balaji T K
2013-04-30 14:03 ` [PATCH 01/13] ARM: OMAP2+: add needs_vmmc to hsmmc_info Balaji T K
2013-04-30 14:03 ` [PATCH 02/13] mmc: omap_hsmmc: make vcc and vcc_aux independent Balaji T K
2013-04-30 14:03 ` [PATCH 03/13] mmc: omap_hsmmc: use needs_vmmc Balaji T K
2013-04-30 14:03 ` [PATCH 04/13] mmc: omap_hsmmc: update needs_vmmc for dt Balaji T K
2013-04-30 14:03 ` [PATCH 05/13] mmc: omap_hsmmc: remove use_reg Balaji T K
2013-04-30 14:03 ` [PATCH 06/13] mmc: omap_hsmmc: add dt pbias and control mmc support Balaji T K
2013-05-16 16:16 ` Tony Lindgren
2013-05-23 16:07 ` Balaji T K
2013-05-23 18:40 ` Tony Lindgren
2013-06-06 19:14 ` [PATCH v2 00/10] mmc: omap_hsmmc: dt pbias and regulator voltage switch Balaji T K
2013-06-06 19:14 ` [PATCH v2 01/10] ARM: OMAP2+: add needs_vmmc to hsmmc_info Balaji T K
2013-06-12 14:24 ` Tony Lindgren
[not found] ` <20130612142409.GW8164-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2013-06-12 17:00 ` Balaji T K
2013-06-06 19:14 ` [PATCH v2 02/10] mmc: omap_hsmmc: make vcc and vcc_aux independent Balaji T K
2013-06-12 14:25 ` Tony Lindgren
2013-06-12 14:33 ` Balaji T K
2013-06-12 14:38 ` Tony Lindgren
2013-06-06 19:14 ` [PATCH v2 03/10] mmc: omap_hsmmc: use needs_vmmc Balaji T K
2013-06-06 19:14 ` [PATCH v2 04/10] mmc: omap_hsmmc: update needs_vmmc for dt Balaji T K
2013-06-06 19:14 ` [PATCH v2 05/10] mmc: omap_hsmmc: remove use_reg Balaji T K
2013-06-06 19:14 ` [PATCH v2 06/10] mmc: omap_hsmmc: add support for pbias configuration in dt Balaji T K
2013-06-12 14:37 ` Tony Lindgren
2013-06-12 17:46 ` Balaji T K
2013-06-13 9:38 ` Linus Walleij
2013-06-13 9:37 ` Linus Walleij
2013-06-13 9:53 ` Tony Lindgren
2013-06-13 10:02 ` Laurent Pinchart
2013-06-13 14:52 ` Balaji T K
2013-06-13 14:53 ` Laurent Pinchart
2013-06-13 12:39 ` Linus Walleij
2013-06-13 14:41 ` Balaji T K
2013-06-13 15:29 ` Linus Walleij
[not found] ` <CACRpkdY6cZ+bT-C9Go3sZVw6ErQqTm0m9__uKQrkg4eUU1thHA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-06-13 16:29 ` Tony Lindgren
2013-06-13 17:45 ` Mark Brown
2013-11-21 14:20 ` [RFC PATCH v3 0/8] mmc: omap_hsmmc: pbias dt and cleanup Balaji T K
2013-11-21 14:20 ` [RFC PATCH v3 1/8] mmc: omap_hsmmc: use devm_regulator API Balaji T K
2013-11-21 15:08 ` Ulf Hansson
2013-12-05 15:29 ` Balaji T K
2013-11-21 14:20 ` [RFC PATCH v3 2/8] mmc: omap_hsmmc: handle vcc and vcc_aux independently Balaji T K
2013-12-10 11:09 ` Ulf Hansson
2013-12-10 11:48 ` Balaji T K
2013-12-11 11:21 ` Ulf Hansson
2013-12-18 14:52 ` Balaji T K
[not found] ` <1385043627-30439-1-git-send-email-balajitk-l0cyMroinI0@public.gmane.org>
2013-11-21 14:20 ` [RFC PATCH v3 3/8] regulator: add pbias regulator support Balaji T K
2013-11-21 14:46 ` Mark Brown
2013-12-03 15:54 ` Balaji T K
2013-12-03 16:06 ` Mark Brown
2013-11-21 14:20 ` [RFC PATCH v3 4/8] mmc: omap_hsmmc: adapt hsmmc to use pbias regulator Balaji T K
2013-11-21 14:20 ` [RFC PATCH v3 5/8] ARM: dts: add pbias dt node Balaji T K
2013-11-21 14:20 ` [RFC PATCH v3 6/8] ARM: dts: add pbias-supply Balaji T K
2013-11-21 17:03 ` Tony Lindgren
2013-12-05 14:55 ` Balaji T K
2013-11-21 14:20 ` [RFC PATCH v3 7/8] ARM: OMAP: enable SYSCON and REGULATOR_PBIAS in omap2plus_defconfig Balaji T K
2013-11-21 14:20 ` [RFC PATCH v3 8/8] mmc: omap_hsmmc: remove pbias workaround Balaji T K
2013-12-10 10:16 ` [PATCH v4 0/7] mmc: omap_hsmmc: pbias dt and cleanup Balaji T K
2013-12-10 10:16 ` [PATCH v4 1/7] mmc: omap_hsmmc: use devm_regulator API Balaji T K
2013-12-10 10:16 ` [PATCH v4 2/7] mmc: omap_hsmmc: handle vcc and vcc_aux independently Balaji T K
2013-12-10 10:16 ` [PATCH v4 3/7] regulator: add pbias regulator support Balaji T K
2013-12-10 10:40 ` Mark Brown
2013-12-10 12:22 ` Balaji T K
2013-12-10 14:34 ` [PATCH v5 " Balaji T K
2013-12-10 18:33 ` Tony Lindgren
2013-12-10 22:39 ` Tony Lindgren
2013-12-12 15:12 ` Balaji T K
2013-12-11 22:46 ` Mark Brown
2013-12-10 10:16 ` [PATCH v4 4/7] mmc: omap_hsmmc: adapt hsmmc to use pbias regulator Balaji T K
2013-12-10 10:16 ` [PATCH v4 5/7] ARM: dts: add pbias dt node Balaji T K
2013-12-10 22:42 ` Tony Lindgren
2013-12-12 14:58 ` Balaji T K
2013-12-10 10:16 ` [PATCH v4 6/7] ARM: OMAP: enable SYSCON and REGULATOR_PBIAS in omap2plus_defconfig Balaji T K
2013-12-10 10:16 ` [PATCH v4 7/7] mmc: omap_hsmmc: remove pbias workaround Balaji T K
2013-12-19 12:38 ` [PATCH v6 0/7] mmc: omap_hsmmc: pbias dt and cleanup Balaji T K
2013-12-19 12:38 ` [PATCH v6 1/7] mmc: omap_hsmmc: use devm_regulator API Balaji T K
2013-12-19 12:38 ` [PATCH v6 2/7] mmc: omap_hsmmc: handle vcc and vcc_aux independently Balaji T K
2013-12-19 12:38 ` Balaji T K [this message]
[not found] ` <1387456720-7202-4-git-send-email-balajitk-l0cyMroinI0@public.gmane.org>
2013-12-19 12:51 ` [PATCH v6 3/7] regulator: add pbias regulator support Mark Brown
2013-12-19 16:33 ` Tony Lindgren
2013-12-20 9:47 ` Balaji T K
2013-12-20 15:57 ` Tony Lindgren
2013-12-20 16:09 ` Mark Brown
2013-12-20 16:13 ` Tony Lindgren
2013-12-20 16:44 ` Balaji T K
2013-12-19 12:38 ` [PATCH v6 4/7] mmc: omap_hsmmc: adapt hsmmc to use pbias regulator Balaji T K
2013-12-19 12:38 ` [PATCH v6 5/7] ARM: dts: add pbias dt node Balaji T K
2013-12-19 16:33 ` Tony Lindgren
2013-12-20 11:40 ` Balaji T K
2013-12-20 15:58 ` Tony Lindgren
2013-12-20 16:08 ` Balaji T K
2013-12-19 12:38 ` [PATCH v6 6/7] ARM: OMAP: enable SYSCON and REGULATOR_PBIAS in omap2plus_defconfig Balaji T K
2013-12-19 12:38 ` [PATCH v6 7/7] mmc: omap_hsmmc: remove pbias workaround Balaji T K
2013-06-13 10:47 ` [PATCH v2 06/10] mmc: omap_hsmmc: add support for pbias configuration in dt Lee Jones
2013-06-13 15:01 ` Balaji T K
2013-06-13 16:17 ` Lee Jones
2013-06-06 19:14 ` [PATCH v2 07/10] mmc: omap_hsmmc: remove dt pbias workaround Balaji T K
[not found] ` <1370546059-24181-1-git-send-email-balajitk-l0cyMroinI0@public.gmane.org>
2013-06-06 19:14 ` [PATCH v2 08/10] ARM: dts: omap3: split omap3_pmx_core Balaji T K
2013-06-12 14:35 ` Tony Lindgren
2013-06-12 17:08 ` Balaji T K
2013-06-12 17:54 ` Tony Lindgren
2013-06-06 19:14 ` [PATCH v2 09/10] ARM: dts: omap3: add pbias and mmc_init pinctrl states Balaji T K
2013-06-12 14:35 ` Tony Lindgren
2013-06-12 17:43 ` Balaji T K
2013-06-12 17:50 ` Tony Lindgren
2013-06-06 19:14 ` [PATCH v2 10/10] ARM: dts: omap4: " Balaji T K
2013-06-12 14:36 ` Tony Lindgren
2013-04-30 14:03 ` [PATCH 07/13] mmc: omap_hsmmc: remove dt pbias workaround Balaji T K
2013-04-30 14:03 ` [PATCH 08/13] Documentation: dt: mmc: omap hsmmc Balaji T K
2013-04-30 14:03 ` [PATCH 09/13] ARM: dts: omap3: Add omap control mmc data Balaji T K
2013-04-30 14:03 ` [PATCH 10/13] ARM: dts: omap36xx: " Balaji T K
2013-04-30 14:03 ` [PATCH 11/13] ARM: dts: omap4: " Balaji T K
2013-04-30 14:03 ` [PATCH 12/13] ARM: dts: omap5: " Balaji T K
2013-04-30 14:03 ` [PATCH 13/13] ARM: dts: am3517: add omap_control_mmc Balaji T K
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