aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/xburst/patches-3.2/0013-MMC-JZ4740-Added-support-for-CPU-frequency-changing.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/xburst/patches-3.2/0013-MMC-JZ4740-Added-support-for-CPU-frequency-changing.patch')
-rw-r--r--target/linux/xburst/patches-3.2/0013-MMC-JZ4740-Added-support-for-CPU-frequency-changing.patch129
1 files changed, 0 insertions, 129 deletions
diff --git a/target/linux/xburst/patches-3.2/0013-MMC-JZ4740-Added-support-for-CPU-frequency-changing.patch b/target/linux/xburst/patches-3.2/0013-MMC-JZ4740-Added-support-for-CPU-frequency-changing.patch
deleted file mode 100644
index f42d67a6fa..0000000000
--- a/target/linux/xburst/patches-3.2/0013-MMC-JZ4740-Added-support-for-CPU-frequency-changing.patch
+++ /dev/null
@@ -1,129 +0,0 @@
-From b95144c1b702f98c7902c75beb83f323701eb7c5 Mon Sep 17 00:00:00 2001
-From: Maarten ter Huurne <maarten@treewalker.org>
-Date: Sun, 19 Jun 2011 10:57:18 +0200
-Subject: [PATCH 13/21] MMC: JZ4740: Added support for CPU frequency changing.
-
-The MSC device clock is stopped before the frequency change.
-After the change a new divider is computed and the clock is restarted.
-Also the frequency change is postponed if an I/O operation is in progress.
----
- drivers/mmc/host/jz4740_mmc.c | 69 +++++++++++++++++++++++++++++++++++++++-
- 1 files changed, 67 insertions(+), 2 deletions(-)
-
---- a/drivers/mmc/host/jz4740_mmc.c
-+++ b/drivers/mmc/host/jz4740_mmc.c
-@@ -23,6 +23,7 @@
- #include <linux/delay.h>
- #include <linux/scatterlist.h>
- #include <linux/clk.h>
-+#include <linux/cpufreq.h>
-
- #include <linux/bitops.h>
- #include <linux/gpio.h>
-@@ -685,6 +686,60 @@ static void jz4740_mmc_enable_sdio_irq(s
- jz4740_mmc_set_irq_enabled(host, JZ_MMC_IRQ_SDIO, enable);
- }
-
-+#ifdef CONFIG_CPU_FREQ
-+
-+static struct jz4740_mmc_host *cpufreq_host;
-+
-+static int jz4740_mmc_cpufreq_transition(struct notifier_block *nb,
-+ unsigned long val, void *data)
-+{
-+ /* TODO: We only have to take action when the PLL freq changes:
-+ the main dividers have no influence on the MSC device clock. */
-+
-+ if (val == CPUFREQ_PRECHANGE) {
-+ mmc_claim_host(cpufreq_host->mmc);
-+ clk_disable(cpufreq_host->clk);
-+ } else if (val == CPUFREQ_POSTCHANGE) {
-+ struct mmc_ios *ios = &cpufreq_host->mmc->ios;
-+ if (ios->clock)
-+ jz4740_mmc_set_clock_rate(cpufreq_host, ios->clock);
-+ if (ios->power_mode != MMC_POWER_OFF)
-+ clk_enable(cpufreq_host->clk);
-+ mmc_release_host(cpufreq_host->mmc);
-+ }
-+ return 0;
-+}
-+
-+static struct notifier_block jz4740_mmc_cpufreq_nb = {
-+ .notifier_call = jz4740_mmc_cpufreq_transition,
-+};
-+
-+static inline int jz4740_mmc_cpufreq_register(struct jz4740_mmc_host *host)
-+{
-+ cpufreq_host = host;
-+ return cpufreq_register_notifier(&jz4740_mmc_cpufreq_nb,
-+ CPUFREQ_TRANSITION_NOTIFIER);
-+}
-+
-+static inline void jz4740_mmc_cpufreq_unregister(void)
-+{
-+ cpufreq_unregister_notifier(&jz4740_mmc_cpufreq_nb,
-+ CPUFREQ_TRANSITION_NOTIFIER);
-+}
-+
-+#else
-+
-+static inline int jz4740_mmc_cpufreq_register(struct jz4740_mmc_host *host)
-+{
-+ return 0;
-+}
-+
-+static inline void jz4740_mmc_cpufreq_unregister(void)
-+{
-+}
-+
-+#endif
-+
- static const struct mmc_host_ops jz4740_mmc_ops = {
- .request = jz4740_mmc_request,
- .set_ios = jz4740_mmc_set_ios,
-@@ -834,11 +889,18 @@ static int __devinit jz4740_mmc_probe(st
- goto err_free_host;
- }
-
-+ ret = jz4740_mmc_cpufreq_register(host);
-+ if (ret) {
-+ dev_err(&pdev->dev,
-+ "Failed to register cpufreq transition notifier\n");
-+ goto err_clk_put;
-+ }
-+
- host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!host->mem) {
- ret = -ENOENT;
- dev_err(&pdev->dev, "Failed to get base platform memory\n");
-- goto err_clk_put;
-+ goto err_cpufreq_unreg;
- }
-
- host->mem = request_mem_region(host->mem->start,
-@@ -846,7 +908,7 @@ static int __devinit jz4740_mmc_probe(st
- if (!host->mem) {
- ret = -EBUSY;
- dev_err(&pdev->dev, "Failed to request base memory region\n");
-- goto err_clk_put;
-+ goto err_cpufreq_unreg;
- }
-
- host->base = ioremap_nocache(host->mem->start, resource_size(host->mem));
-@@ -929,6 +991,8 @@ err_iounmap:
- iounmap(host->base);
- err_release_mem_region:
- release_mem_region(host->mem->start, resource_size(host->mem));
-+err_cpufreq_unreg:
-+ jz4740_mmc_cpufreq_unregister();
- err_clk_put:
- clk_put(host->clk);
- err_free_host:
-@@ -958,6 +1022,7 @@ static int __devexit jz4740_mmc_remove(s
- iounmap(host->base);
- release_mem_region(host->mem->start, resource_size(host->mem));
-
-+ jz4740_mmc_cpufreq_unregister();
- clk_put(host->clk);
-
- platform_set_drvdata(pdev, NULL);