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author | Philipp Zabel <philipp.zabel@gmail.com> | 2009-06-15 12:10:24 +0200 |
---|---|---|
committer | Samuel Ortiz <sameol@linux.intel.com> | 2009-06-17 19:41:48 +0200 |
commit | 9461f65a85e17926ee88878049e6b5de366a483d (patch) | |
tree | a234d33d6623625b844664d9829a46fbcbcdf342 /drivers | |
parent | 1b89040c3aa4500c97859bad714e010441e9c477 (diff) | |
download | linux-stable-9461f65a85e17926ee88878049e6b5de366a483d.tar.gz linux-stable-9461f65a85e17926ee88878049e6b5de366a483d.tar.bz2 linux-stable-9461f65a85e17926ee88878049e6b5de366a483d.zip |
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@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mfd/Kconfig | 1 | ||||
-rw-r--r-- | drivers/mfd/asic3.c | 99 |
2 files changed, 100 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 6ea325cc8d28..491ac0f800d2 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 d5dd0dfae872..a90658e86307 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, @@ -616,6 +619,98 @@ static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk) spin_unlock_irqrestore(&asic->lock, flags); } +/* MFD cells (SPI, PWM, LED, DS1WM, MMC) */ +static struct ds1wm_driver_data ds1wm_pdata = { + .active_high = 1, +}; + +static struct resource ds1wm_resources[] = { + { + .start = ASIC3_OWM_BASE, + .end = ASIC3_OWM_BASE + 0x13, + .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 asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + /* 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); + + /* Reset and enable DS1WM */ + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET), + ASIC3_EXTCF_OWM_RESET, 1); + msleep(1); + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET), + ASIC3_EXTCF_OWM_RESET, 0); + msleep(1); + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + ASIC3_EXTCF_OWM_EN, 1); + msleep(1); + + return 0; +} + +static int ds1wm_disable(struct platform_device *pdev) +{ + struct asic3 *asic = dev_get_drvdata(pdev->dev.parent); + + asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + 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_register(asic, ASIC3_OFFSET(EXTCF, SELECT), + ASIC3_EXTCF_OWM_SMB, 0); + + ds1wm_resources[0].start >>= asic->bus_shift; + ds1wm_resources[0].end >>= asic->bus_shift; + + 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) +{ + mfd_remove_devices(&pdev->dev); +} + /* Core */ static int __init asic3_probe(struct platform_device *pdev) { @@ -683,6 +778,8 @@ 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; @@ -704,6 +801,8 @@ 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; |