mirror of
https://git.yoctoproject.org/meta-ti
synced 2026-07-17 06:48:07 +00:00
Koen Kooi
121 lines
4.2 KiB
Diff
121 lines
4.2 KiB
Diff
From 6ec7cf889c9a8ddf97fbbcbda4888b0f17930e04 Mon Sep 17 00:00:00 2001
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From: Thara Gopinath <thara@ti.com>
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Date: Fri, 29 Oct 2010 20:43:29 +0530
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Subject: [PATCH 09/20] OMAP: Introduce device specific set rate and get rate in omap_device structure
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This patch extends the omap_device structure to contain
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pointers to scale the operating rate of the
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device and to retrieve the operating rate of the device.
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This patch also adds the three new APIs in the omap device layer
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namely omap_device_set_rate that can be called to set a new operating
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rate for a device, omap_device_get_rate that can be called to retrieve
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the operating frequency for a device and omap_device_populate_rate_fns
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to populte the device specific set_rate and get_rate API's.
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The omap_device_set_rate and omap_device_get_rate does some routine error
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checks and finally calls into the device specific set_rate
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and get_rate APIs populated through omap_device_populate_rate_fns.
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Signed-off-by: Thara Gopinath <thara@ti.com>
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---
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arch/arm/plat-omap/include/plat/omap_device.h | 9 +++++
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arch/arm/plat-omap/omap_device.c | 49 +++++++++++++++++++++++++
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2 files changed, 58 insertions(+), 0 deletions(-)
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diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h
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index e4c349f..1178b86 100644
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--- a/arch/arm/plat-omap/include/plat/omap_device.h
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+++ b/arch/arm/plat-omap/include/plat/omap_device.h
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@@ -50,6 +50,8 @@ extern struct device omap_device_parent;
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* @hwmods: (one .. many per omap_device)
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* @hwmods_cnt: ARRAY_SIZE() of @hwmods
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* @pm_lats: ptr to an omap_device_pm_latency table
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+ * @set_rate: fn ptr to change the operating rate.
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+ * @get_rate: fn ptr to retrieve the current operating rate.
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* @pm_lats_cnt: ARRAY_SIZE() of what is passed to @pm_lats
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* @pm_lat_level: array index of the last odpl entry executed - -1 if never
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* @dev_wakeup_lat: dev wakeup latency in nanoseconds
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@@ -67,6 +69,8 @@ struct omap_device {
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struct platform_device pdev;
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struct omap_hwmod **hwmods;
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struct omap_device_pm_latency *pm_lats;
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+ int (*set_rate)(struct device *dev, unsigned long rate);
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+ unsigned long (*get_rate) (struct device *dev);
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u32 dev_wakeup_lat;
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u32 _dev_wakeup_lat_limit;
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u8 pm_lats_cnt;
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@@ -108,6 +112,11 @@ int omap_device_align_pm_lat(struct platform_device *pdev,
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u32 new_wakeup_lat_limit);
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struct powerdomain *omap_device_get_pwrdm(struct omap_device *od);
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u32 omap_device_get_context_loss_count(struct platform_device *pdev);
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+int omap_device_set_rate(struct device *dev, unsigned long freq);
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+unsigned long omap_device_get_rate(struct device *dev);
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+void omap_device_populate_rate_fns(struct device *dev,
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+ int (*set_rate)(struct device *dev, unsigned long rate),
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+ unsigned long (*get_rate) (struct device *dev));
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/* Other */
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diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
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index 2c95e61..0d67af6 100644
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--- a/arch/arm/plat-omap/omap_device.c
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+++ b/arch/arm/plat-omap/omap_device.c
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@@ -813,6 +813,55 @@ int omap_device_enable_clocks(struct omap_device *od)
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return 0;
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}
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+int omap_device_set_rate(struct device *dev, unsigned long freq)
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+{
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+ struct platform_device *pdev;
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+ struct omap_device *od;
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+
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+ pdev = container_of(dev, struct platform_device, dev);
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+ od = _find_by_pdev(pdev);
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+
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+ if (!od->set_rate) {
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+ dev_err(dev, "%s: No set_rate API for scaling device\n",
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+ __func__);
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+ return -ENODATA;
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+ }
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+
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+ return od->set_rate(dev, freq);
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+}
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+
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+unsigned long omap_device_get_rate(struct device *dev)
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+{
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+ struct platform_device *pdev;
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+ struct omap_device *od;
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+
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+ pdev = container_of(dev, struct platform_device, dev);
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+ od = _find_by_pdev(pdev);
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+
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+
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+ if (!od->get_rate) {
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+ dev_err(dev, "%s: No get rate API for the device\n",
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+ __func__);
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+ return 0;
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+ }
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+
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+ return od->get_rate(dev);
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+}
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+
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+void omap_device_populate_rate_fns(struct device *dev,
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+ int (*set_rate)(struct device *dev, unsigned long rate),
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+ unsigned long (*get_rate) (struct device *dev))
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+{
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+ struct platform_device *pdev;
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+ struct omap_device *od;
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+
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+ pdev = container_of(dev, struct platform_device, dev);
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+ od = _find_by_pdev(pdev);
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+
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+ od->set_rate = set_rate;
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+ od->get_rate = get_rate;
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+}
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+
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struct device omap_device_parent = {
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.init_name = "omap",
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.parent = &platform_bus,
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--
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1.6.6.1
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