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Message-Id: <1244140576-18006-7-git-send-email-philipp.zabel@gmail.com>
Date: Thu, 4 Jun 2009 20:36:15 +0200
From: Philipp Zabel <philipp.zabel@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Samuel Ortiz <sameo@...nedhand.com>,
Philipp Zabel <philipp.zabel@...il.com>
Subject: [PATCH 6/7] MFD: ASIC3: enable DS1WM cell.
This enables the ASIC3's DS1WM MFD cell, supported by the ds1wm driver.
Signed-off-by: Philipp Zabel <philipp.zabel@...il.com>
---
drivers/mfd/Kconfig | 1 +
drivers/mfd/asic3.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 99 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index ee3927a..9e6d5ee 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -30,6 +30,7 @@ config MFD_SM501_GPIO
config MFD_ASIC3
bool "Support for Compaq ASIC3"
depends on GENERIC_HARDIRQS && GPIOLIB && ARM
+ select MFD_CORE
---help---
This driver supports the ASIC3 multifunction chip found on many
PDAs (mainly iPAQ and HTC based ones)
diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
index a2a446d..cfe8b32 100644
--- a/drivers/mfd/asic3.c
+++ b/drivers/mfd/asic3.c
@@ -17,6 +17,7 @@
*/
#include <linux/kernel.h>
+#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/io.h>
@@ -24,6 +25,8 @@
#include <linux/platform_device.h>
#include <linux/mfd/asic3.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/ds1wm.h>
enum {
ASIC3_CLOCK_SPI,
@@ -649,6 +652,97 @@ static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk)
spin_unlock_irqrestore(&asic->lock, flags);
}
+/* MFD cells (SPI, PWM, DS1WM, MMC) */
+static struct ds1wm_driver_data ds1wm_pdata = {
+ .active_high = 1,
+};
+
+static struct resource ds1wm_resources[] = {
+ {
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = ASIC3_IRQ_OWM,
+ .start = ASIC3_IRQ_OWM,
+ .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
+ },
+};
+
+static int ds1wm_enable(struct platform_device *pdev)
+{
+ struct device *dev = pdev->dev.parent;
+ struct asic3 *asic = dev->driver_data;
+
+ /* Turn on external clocks and the OWM clock */
+ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
+ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
+ asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
+ msleep(1);
+
+ asic3_set_extcf_reset(dev, ASIC3_EXTCF_OWM_RESET, 1);
+ msleep(1);
+ asic3_set_extcf_reset(dev, ASIC3_EXTCF_OWM_RESET, 0);
+ msleep(1);
+
+ /* Clear OWM_SMB, set OWM_EN */
+ asic3_set_extcf_select(dev, ASIC3_EXTCF_OWM_EN, 1);
+ msleep(1);
+
+ return 0;
+}
+
+static int ds1wm_disable(struct platform_device *pdev)
+{
+ struct device *dev = pdev->dev.parent;
+ struct asic3 *asic = dev->driver_data;
+
+ asic3_set_extcf_select(dev, ASIC3_EXTCF_OWM_EN, 0);
+
+ asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
+ asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
+ asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
+
+ return 0;
+}
+
+static struct mfd_cell asic3_cell_ds1wm = {
+ .name = "ds1wm",
+ .enable = ds1wm_enable,
+ .disable = ds1wm_disable,
+ .driver_data = &ds1wm_pdata,
+ .num_resources = ARRAY_SIZE(ds1wm_resources),
+ .resources = ds1wm_resources,
+};
+
+static int __init asic3_mfd_probe(struct platform_device *pdev,
+ struct resource *mem)
+{
+ struct asic3 *asic = platform_get_drvdata(pdev);
+ int ret;
+
+ /* DS1WM */
+ asic3_set_extcf_select(&pdev->dev, ASIC3_EXTCF_OWM_SMB, 0);
+
+ ds1wm_resources[0].start = ASIC3_OWM_BASE >> asic->bus_shift;
+ ds1wm_resources[0].end = ds1wm_resources[0].start
+ + (5 << (2 - asic->bus_shift)) - 1;
+
+ asic3_cell_ds1wm.platform_data = &asic3_cell_ds1wm;
+ asic3_cell_ds1wm.data_size = sizeof(asic3_cell_ds1wm);
+
+ ret = mfd_add_devices(&pdev->dev, pdev->id,
+ &asic3_cell_ds1wm, 1, mem, asic->irq_base);
+
+ return ret;
+}
+
+static void asic3_mfd_remove(struct platform_device *pdev)
+{
+ struct asic3 *asic = platform_get_drvdata(pdev);
+
+ mfd_remove_devices(&pdev->dev);
+}
+
/* Core */
static int __init asic3_probe(struct platform_device *pdev)
{
@@ -716,6 +810,8 @@ static int __init asic3_probe(struct platform_device *pdev)
*/
memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init));
+ asic3_mfd_probe(pdev, mem);
+
dev_info(asic->dev, "ASIC3 Core driver\n");
return 0;
@@ -737,6 +833,8 @@ static int asic3_remove(struct platform_device *pdev)
int ret;
struct asic3 *asic = platform_get_drvdata(pdev);
+ asic3_mfd_remove(pdev);
+
ret = asic3_gpio_remove(pdev);
if (ret < 0)
return ret;
--
1.6.3.1
--
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