113 lines
3.2 KiB
Diff
113 lines
3.2 KiB
Diff
From e15ad2154b6166804fc04487e0398c9aef9e7c97 Mon Sep 17 00:00:00 2001
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From: Mika Westerberg <mika.westerberg@linux.intel.com>
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Date: Mon, 30 Nov 2015 17:11:41 +0200
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Subject: [PATCH 13/16] mfd: intel-lpss: Add support for passing device
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properties
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If the boot firmware does not support ACPI we need a way to pass device
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configuration information to the drivers. The unified device properties API
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already supports passing platform data via properties so let's take
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advantage of that and allow probe drivers to pass set of properties to the
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host controller driver.
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In order to do that we need to be able to modify the MFD cell corresponding
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the host controller, so make the core driver to take copy of the cell
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instead of using it directly. Then we can assign info->pset to the
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resulting copy of a cell and let the MFD core to assign that to the
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resulting device.
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Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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---
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drivers/mfd/intel-lpss.c | 16 ++++++++++++----
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drivers/mfd/intel-lpss.h | 2 ++
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2 files changed, 14 insertions(+), 4 deletions(-)
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diff --git a/drivers/mfd/intel-lpss.c b/drivers/mfd/intel-lpss.c
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index 6255513..1743788 100644
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--- a/drivers/mfd/intel-lpss.c
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+++ b/drivers/mfd/intel-lpss.c
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@@ -24,6 +24,7 @@
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#include <linux/mfd/core.h>
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#include <linux/pm_qos.h>
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#include <linux/pm_runtime.h>
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+#include <linux/property.h>
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#include <linux/seq_file.h>
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#include <linux/io-64-nonatomic-lo-hi.h>
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@@ -72,7 +73,7 @@ struct intel_lpss {
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enum intel_lpss_dev_type type;
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struct clk *clk;
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struct clk_lookup *clock;
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- const struct mfd_cell *cell;
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+ struct mfd_cell *cell;
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struct device *dev;
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void __iomem *priv;
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int devid;
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@@ -217,6 +218,7 @@ static void intel_lpss_ltr_hide(struct intel_lpss *lpss)
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static int intel_lpss_assign_devs(struct intel_lpss *lpss)
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{
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+ const struct mfd_cell *cell;
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unsigned int type;
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type = lpss->caps & LPSS_PRIV_CAPS_TYPE_MASK;
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@@ -224,18 +226,22 @@ static int intel_lpss_assign_devs(struct intel_lpss *lpss)
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switch (type) {
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case LPSS_DEV_I2C:
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- lpss->cell = &intel_lpss_i2c_cell;
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+ cell = &intel_lpss_i2c_cell;
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break;
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case LPSS_DEV_UART:
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- lpss->cell = &intel_lpss_uart_cell;
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+ cell = &intel_lpss_uart_cell;
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break;
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case LPSS_DEV_SPI:
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- lpss->cell = &intel_lpss_spi_cell;
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+ cell = &intel_lpss_spi_cell;
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break;
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default:
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return -ENODEV;
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}
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+ lpss->cell = devm_kmemdup(lpss->dev, cell, sizeof(*cell), GFP_KERNEL);
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+ if (!lpss->cell)
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+ return -ENOMEM;
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+
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lpss->type = type;
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return 0;
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@@ -401,6 +407,8 @@ int intel_lpss_probe(struct device *dev,
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if (ret)
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return ret;
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+ lpss->cell->pset = info->pset;
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+
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intel_lpss_init_dev(lpss);
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lpss->devid = ida_simple_get(&intel_lpss_devid_ida, 0, 0, GFP_KERNEL);
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diff --git a/drivers/mfd/intel-lpss.h b/drivers/mfd/intel-lpss.h
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index 2c7f8d7..0dcea9e 100644
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--- a/drivers/mfd/intel-lpss.h
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+++ b/drivers/mfd/intel-lpss.h
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@@ -16,12 +16,14 @@
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struct device;
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struct resource;
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+struct property_set;
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struct intel_lpss_platform_info {
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struct resource *mem;
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int irq;
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unsigned long clk_rate;
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const char *clk_con_id;
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+ struct property_set *pset;
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};
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int intel_lpss_probe(struct device *dev,
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--
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2.5.0
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