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Message-Id: <1392339605-20691-23-git-send-email-laurent.pinchart+renesas@ideasonboard.com>
Date: Fri, 14 Feb 2014 02:00:00 +0100
From: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
To: linux-sh@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 22/27] clocksource: sh_cmt: Drop support for legacy platform data
Now that all platforms have switched to the new-style platform data,
drop support for the legacy version.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
---
drivers/clocksource/sh_cmt.c | 174 ++++++++++---------------------------------
1 file changed, 39 insertions(+), 135 deletions(-)
diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c
index 077879b..fe9694b 100644
--- a/drivers/clocksource/sh_cmt.c
+++ b/drivers/clocksource/sh_cmt.c
@@ -115,9 +115,7 @@ struct sh_cmt_device {
struct platform_device *pdev;
const struct sh_cmt_info *info;
- bool legacy;
- void __iomem *mapbase_ch;
void __iomem *mapbase;
struct clk *clk;
@@ -824,58 +822,45 @@ static int sh_cmt_register(struct sh_cmt_channel *ch, char *name,
return 0;
}
-static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index,
+static int sh_cmt_setup_channel(struct sh_cmt_channel *ch,
const struct sh_timer_channel_config *ch_cfg,
unsigned int hwidx, struct sh_cmt_device *cmt)
{
- unsigned long clockevent_rating;
- unsigned long clocksource_rating;
int irq;
int ret;
ch->cmt = cmt;
- ch->index = ch_cfg ? ch_cfg->index : index;
+ ch->index = ch_cfg->index;
ch->hwidx = hwidx;
/*
* Compute the address of the channel control register block. For the
* timers with a per-channel start/stop register, compute its address
* as well.
- *
- * For legacy configuration the address has been mapped explicitly.
*/
- if (cmt->legacy) {
- ch->ioctrl = cmt->mapbase_ch;
- } else {
- switch (cmt->info->model) {
- case SH_CMT_16BIT:
- ch->ioctrl = cmt->mapbase + 2 + ch->hwidx * 6;
- break;
- case SH_CMT_32BIT:
- case SH_CMT_48BIT:
- ch->ioctrl = cmt->mapbase + 0x10 + ch->hwidx * 0x10;
- break;
- case SH_CMT_32BIT_FAST:
- /*
- * The 32-bit "fast" timer has a single channel at hwidx
- * 5 but is located at offset 0x40 instead of 0x60 for
- * some reason.
- */
- ch->ioctrl = cmt->mapbase + 0x40;
- break;
- case SH_CMT_48BIT_GEN2:
- ch->iostart = cmt->mapbase + ch->hwidx * 0x100;
- ch->ioctrl = ch->iostart + 0x10;
- break;
- }
+ switch (cmt->info->model) {
+ case SH_CMT_16BIT:
+ ch->ioctrl = cmt->mapbase + 2 + ch->hwidx * 6;
+ break;
+ case SH_CMT_32BIT:
+ case SH_CMT_48BIT:
+ ch->ioctrl = cmt->mapbase + 0x10 + ch->hwidx * 0x10;
+ break;
+ case SH_CMT_32BIT_FAST:
+ /*
+ * The 32-bit "fast" timer has a single channel at hwidx 5 but
+ * is located at offset 0x40 instead of 0x60 for some reason.
+ */
+ ch->ioctrl = cmt->mapbase + 0x40;
+ break;
+ case SH_CMT_48BIT_GEN2:
+ ch->iostart = cmt->mapbase + ch->hwidx * 0x100;
+ ch->ioctrl = ch->iostart + 0x10;
+ break;
}
/* Request irq using setup_irq() (too early for request_irq()). */
- if (cmt->legacy)
- irq = platform_get_irq(cmt->pdev, 0);
- else
- irq = platform_get_irq(cmt->pdev, ch->index);
-
+ irq = platform_get_irq(cmt->pdev, ch->index);
if (irq < 0) {
dev_err(&cmt->pdev->dev, "failed to get irq\n");
return irq;
@@ -894,20 +879,11 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index,
ch->match_value = ch->max_match_value;
raw_spin_lock_init(&ch->lock);
- if (ch_cfg) {
- ch->timer_bit = cmt->info->model == SH_CMT_48BIT_GEN2
- ? 0 : ch->hwidx;
- clockevent_rating = ch_cfg->clockevent_rating;
- clocksource_rating = ch_cfg->clocksource_rating;
- } else {
- struct sh_timer_config *cfg = cmt->pdev->dev.platform_data;
- ch->timer_bit = cfg->timer_bit;
- clockevent_rating = cfg->clockevent_rating;
- clocksource_rating = cfg->clocksource_rating;
- }
+ ch->timer_bit = cmt->info->model == SH_CMT_48BIT_GEN2 ? 0 : ch->hwidx;
ret = sh_cmt_register(ch, (char *)dev_name(&cmt->pdev->dev),
- clockevent_rating, clocksource_rating);
+ ch_cfg->clockevent_rating,
+ ch_cfg->clocksource_rating);
if (ret) {
dev_err(&cmt->pdev->dev, "registration failed\n");
return ret;
@@ -942,59 +918,12 @@ static int sh_cmt_map_memory(struct sh_cmt_device *cmt)
return 0;
}
-static int sh_cmt_map_memory_legacy(struct sh_cmt_device *cmt)
-{
- struct sh_timer_config *cfg = cmt->pdev->dev.platform_data;
- struct resource *res, *res2;
-
- /* map memory, let mapbase_ch point to our channel */
- res = platform_get_resource(cmt->pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&cmt->pdev->dev, "failed to get I/O memory\n");
- return -ENXIO;
- }
-
- cmt->mapbase_ch = ioremap_nocache(res->start, resource_size(res));
- if (cmt->mapbase_ch == NULL) {
- dev_err(&cmt->pdev->dev, "failed to remap I/O memory\n");
- return -ENXIO;
- }
-
- /* optional resource for the shared timer start/stop register */
- res2 = platform_get_resource(cmt->pdev, IORESOURCE_MEM, 1);
-
- /* map second resource for CMSTR */
- cmt->mapbase = ioremap_nocache(res2 ? res2->start :
- res->start - cfg->channel_offset,
- res2 ? resource_size(res2) : 2);
- if (cmt->mapbase == NULL) {
- dev_err(&cmt->pdev->dev, "failed to remap I/O second memory\n");
- iounmap(cmt->mapbase_ch);
- return -ENXIO;
- }
-
- /* identify the model based on the resources */
- if (resource_size(res) == 6)
- cmt->info = &sh_cmt_info[SH_CMT_16BIT];
- else if (res2 && (resource_size(res2) == 4))
- cmt->info = &sh_cmt_info[SH_CMT_48BIT_GEN2];
- else
- cmt->info = &sh_cmt_info[SH_CMT_32BIT];
-
- return 0;
-}
-
-static void sh_cmt_unmap_memory(struct sh_cmt_device *cmt)
-{
- iounmap(cmt->mapbase);
- if (cmt->mapbase_ch)
- iounmap(cmt->mapbase_ch);
-}
-
static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
{
struct sh_timer_config *cfg = pdev->dev.platform_data;
const struct platform_device_id *id = pdev->id_entry;
+ unsigned int mask;
+ unsigned int i;
int ret;
memset(cmt, 0, sizeof(*cmt));
@@ -1006,10 +935,9 @@ static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
}
cmt->info = (const struct sh_cmt_info *)id->driver_data;
- cmt->legacy = cmt->info ? false : true;
/* Get hold of clock. */
- cmt->clk = clk_get(&cmt->pdev->dev, cmt->legacy ? "cmt_fck" : NULL);
+ cmt->clk = clk_get(&cmt->pdev->dev, NULL);
if (IS_ERR(cmt->clk)) {
dev_err(&cmt->pdev->dev, "cannot get clock\n");
return PTR_ERR(cmt->clk);
@@ -1019,26 +947,14 @@ static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
if (ret < 0)
goto err_clk_put;
- /*
- * Map the memory resource(s). We need to support both the legacy
- * platform device configuration (with one device per channel) and the
- * new version (with multiple channels per device).
- */
- if (cmt->legacy)
- ret = sh_cmt_map_memory_legacy(cmt);
- else
- ret = sh_cmt_map_memory(cmt);
-
+ /* Map the memory resource(s). */
+ ret = sh_cmt_map_memory(cmt);
if (ret < 0)
goto err_clk_unprepare;
/* Allocate and setup the channels. */
- if (cmt->legacy) {
- cmt->num_channels = 1;
- } else {
- cmt->num_channels = cfg->num_channels;
- cmt->hw_channels = ~cfg->channels_mask;
- }
+ cmt->num_channels = cfg->num_channels;
+ cmt->hw_channels = ~cfg->channels_mask;
cmt->channels = kzalloc(cmt->num_channels * sizeof(*cmt->channels),
GFP_KERNEL);
@@ -1047,26 +963,15 @@ static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
goto err_unmap;
}
- if (cmt->legacy) {
- ret = sh_cmt_setup_channel(&cmt->channels[0], cfg->timer_bit,
- NULL, cfg->timer_bit, cmt);
+ for (i = 0, mask = cmt->hw_channels; i < cmt->num_channels; ++i) {
+ unsigned int hwidx = ffs(mask) - 1;
+
+ ret = sh_cmt_setup_channel(&cmt->channels[i], &cfg->channels[i],
+ hwidx, cmt);
if (ret < 0)
goto err_unmap;
- } else {
- const struct sh_timer_channel_config *ch_cfg = cfg->channels;
- unsigned int mask = cmt->hw_channels;
- unsigned int i;
-
- for (i = 0; i < cmt->num_channels; ++i) {
- unsigned int hwidx = ffs(mask) - 1;
- ret = sh_cmt_setup_channel(&cmt->channels[i], 0, ch_cfg,
- hwidx, cmt);
- if (ret < 0)
- goto err_unmap;
-
- mask &= ~(1 << hwidx);
- }
+ mask &= ~(1 << hwidx);
}
platform_set_drvdata(pdev, cmt);
@@ -1075,7 +980,7 @@ static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
err_unmap:
kfree(cmt->channels);
- sh_cmt_unmap_memory(cmt);
+ iounmap(cmt->mapbase);
err_clk_unprepare:
clk_unprepare(cmt->clk);
err_clk_put:
@@ -1128,7 +1033,6 @@ static int sh_cmt_remove(struct platform_device *pdev)
}
static const struct platform_device_id sh_cmt_id_table[] = {
- { "sh_cmt", 0 },
{ "sh-cmt-16", (kernel_ulong_t)&sh_cmt_info[SH_CMT_16BIT] },
{ "sh-cmt-32", (kernel_ulong_t)&sh_cmt_info[SH_CMT_32BIT] },
{ "sh-cmt-32-fast", (kernel_ulong_t)&sh_cmt_info[SH_CMT_32BIT_FAST] },
--
1.8.3.2
--
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