Add the mfd core driver which supports touchscreen
and ADC.
With this patch we are only adding infrastructure to
support the MFD clients.
Signed-off-by: Patil, Rachna
---
Changes in v2:
Merged "[PATCH 5/5] MFD: ti_tscadc: Add check on number of i/p
channels",
patch submitted in previous version into this file.
Changes in v3:
No changes
Changes in v4:
No changes
drivers/mfd/Kconfig |9 ++
drivers/mfd/Makefile |1 +
drivers/mfd/ti_am335x_tscadc.c | 193 ++
include/linux/mfd/ti_am335x_tscadc.h | 133 +++
4 files changed, 336 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/ti_am335x_tscadc.c
create mode 100644 include/linux/mfd/ti_am335x_tscadc.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b1a1462..e472184 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -94,6 +94,15 @@ config MFD_TI_SSP
To compile this driver as a module, choose M here: the
module will be called ti-ssp.
+config MFD_TI_AM335X_TSCADC
+ tristate "TI ADC / Touch Screen chip support"
+ depends on ARCH_OMAP2PLUS
+ help
+ If you say yes here you get support for Texas Instruments series
+ of Touch Screen /ADC chips.
+ To compile this driver as a module, choose M here: the
+ module will be called ti_am335x_tscadc.
+
config HTC_EGPIO
bool "HTC EGPIO support"
depends on GENERIC_HARDIRQS && GPIOLIB && ARM
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 79dd22d..bc6b2f0 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o
obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o
obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
obj-$(CONFIG_MFD_TI_SSP) += ti-ssp.o
+obj-$(CONFIG_MFD_TI_AM335X_TSCADC) += ti_am335x_tscadc.o
obj-$(CONFIG_MFD_STA2X11) += sta2x11-mfd.o
obj-$(CONFIG_MFD_STMPE)+= stmpe.o
diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
new file mode 100644
index 000..ae93b48
--- /dev/null
+++ b/drivers/mfd/ti_am335x_tscadc.c
@@ -0,0 +1,193 @@
+/*
+ * TI Touch Screen / ADC MFD driver
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.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
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+static unsigned int tscadc_readl(struct ti_tscadc_dev *tsadc, unsigned int reg)
+{
+ return readl(tsadc->tscadc_base + reg);
+}
+
+static void tscadc_writel(struct ti_tscadc_dev *tsadc, unsigned int reg,
+ unsigned int val)
+{
+ writel(val, tsadc->tscadc_base + reg);
+}
+
+static void tscadc_idle_config(struct ti_tscadc_dev *config)
+{
+ unsigned int idleconfig;
+
+ idleconfig = STEPCONFIG_YNN | STEPCONFIG_INM_ADCREFM |
+ STEPCONFIG_INP_ADCREFM | STEPCONFIG_YPN;
+
+ tscadc_writel(config, REG_IDLECONFIG, idleconfig);
+}
+
+static int __devinit ti_tscadc_probe(struct platform_device *pdev)
+{
+ struct ti_tscadc_dev*tscadc;
+ struct resource *res;
+ struct clk *clk;
+ struct mfd_tscadc_board *pdata = pdev->dev.platform_data;
+ int irq;
+ int err, ctrl;
+ int clk_value, clock_rate;
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "Could not find platform data\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "no memory resource defined.\n");
+ return -EINVAL;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "no irq ID is specified.\n");
+ return -EINVAL;
+ }
+
+ /* Allocate memory for device */
+ tscadc = kzalloc(sizeof(struct ti_tscadc_dev), GFP_KERNEL);
+ if (!tscadc) {
+ dev_err(&pdev->dev, "failed to allocate memory.\n");
+ return -ENOMEM;
+ }
+ tscadc->dev = &pdev->dev;
+ tscadc->irq = irq;
+
+ res = request_mem_region(res->start, resource_size(res), pdev->name);
+ if (!res) {
+ dev_err(&pdev->dev, "failed to reserve registers.\n");
+ err = -EBUSY;
+ goto err
