add support for target 3c24xx (more known as Openmoko GTA02 "Freerunner") and merge it with the openmoko-target and the work Michael Buesch <mb> did

SVN-Revision: 13609

1 files changed, 120 insertions, 0 deletions

diff --git a/target/linux/s3c24xx/patches/0230-add-glamo-mci-slower-clocking-dynamic-switching.patc.patch b/target/linux/s3c24xx/patches/0230-add-glamo-mci-slower-clocking-dynamic-switching.patc.patch
new file mode 100755
index 0000000..74442df
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0230-add-glamo-mci-slower-clocking-dynamic-switching.patc.patch
@@ -0,0 +1,120 @@
+From 911b448d4b528c403f973f9e5aa34be94bffaf1e Mon Sep 17 00:00:00 2001
+From: Andy Green <andy@openmoko.com>
+Date: Wed, 30 Jul 2008 14:37:01 +0100
+Subject: [PATCH] add-glamo-mci-slower-clocking-dynamic-switching.patch
+
+This patch gives glamo-mci a concept of a platform-defined
+dynamic clock slowing callback.  It means that platform code
+can associate some completely external state to decide if
+we run the SD clock at normal rate or a rate divided by a
+module parameter "sd_slow_ratio", which you can set on
+kernel commandline like this:
+
+glamo_mci.sd_slow_ratio=8
+
+you can also change it at runtime by
+
+echo 8 > /sys/module/glamo_mci/parameters/sd_slow_ratio
+
+If no platform callback is defined, then no slow mode
+is used.  If it is defined, then the default division
+action is / 8, eg, 16MHz normal -> 2MHz slow mode.
+
+Signed-off-by: Andy Green <andy@openmoko.com>
+---
+ drivers/mfd/glamo/glamo-core.c |    2 ++
+ drivers/mfd/glamo/glamo-core.h |    2 ++
+ drivers/mfd/glamo/glamo-mci.c  |   30 ++++++++++++++++++++++++++++--
+ include/linux/glamofb.h        |    2 ++
+ 4 files changed, 34 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/mfd/glamo/glamo-core.c b/drivers/mfd/glamo/glamo-core.c
+index cb9b056..0e7a650 100644
+--- a/drivers/mfd/glamo/glamo-core.c
++++ b/drivers/mfd/glamo/glamo-core.c
+@@ -1116,6 +1116,8 @@ static int __init glamo_probe(struct platform_device *pdev)
+ 	/* bring MCI specific stuff over from our MFD platform data */
+ 	glamo_mci_def_pdata.glamo_set_mci_power =
+ 					glamo->pdata->glamo_set_mci_power;
++	glamo_mci_def_pdata.glamo_mci_use_slow =
++					glamo->pdata->glamo_mci_use_slow;
+ 	glamo_mci_def_pdata.glamo_irq_is_wired =
+ 					glamo->pdata->glamo_irq_is_wired;
+ 	glamo_mci_def_pdata.mci_suspending =
+diff --git a/drivers/mfd/glamo/glamo-core.h b/drivers/mfd/glamo/glamo-core.h
+index c89f810..dd6f67c 100644
+--- a/drivers/mfd/glamo/glamo-core.h
++++ b/drivers/mfd/glamo/glamo-core.h
+@@ -72,6 +72,8 @@ struct glamo_mci_pdata {
+ 	unsigned long	ocr_avail;
+ 	void		(*glamo_set_mci_power)(unsigned char power_mode,
+ 				     unsigned short vdd);
++	/* glamo-mci asking if it should use the slow clock to card */
++	int		(*glamo_mci_use_slow)(void);
+ 	int		(*glamo_irq_is_wired)(void);
+ 	void		(*mci_suspending)(struct platform_device *dev);
+ 	int		(*mci_all_dependencies_resumed)(struct platform_device *dev);
+diff --git a/drivers/mfd/glamo/glamo-mci.c b/drivers/mfd/glamo/glamo-mci.c
+index 7a2b060..d34632a 100644
+--- a/drivers/mfd/glamo/glamo-mci.c
++++ b/drivers/mfd/glamo/glamo-mci.c
+@@ -57,6 +57,23 @@ static int sd_max_clk = 50000000 / 3;
+ module_param(sd_max_clk, int, 0644);
+ 
+ /*
++ * Slow SD clock rate
++ *
++ * you can override this on kernel commandline using
++ *
++ *   glamo_mci.sd_slow_ratio=8
++ *
++ * for example
++ *
++ * platform callback is used to decide effective clock rate, if not
++ * defined then max is used, if defined and returns nonzero, rate is
++ * divided by this factor
++ */
++
++static int sd_slow_ratio = 8;
++module_param(sd_slow_ratio, int, 0644);
++
++/*
+  * SD Signal drive strength
+  *
+  * you can override this on kernel commandline using
+@@ -554,8 +571,17 @@ static void glamo_mci_send_request(struct mmc_host *mmc)
+ 		 cmd->opcode, cmd->arg, cmd->data, cmd->mrq->stop,
+ 		 cmd->flags);
+ 
+-	/* resume requested clock rate */
+-	__glamo_mci_fix_card_div(host, host->clk_div);
++	/* resume requested clock rate
++	 * scale it down by sd_slow_ratio if platform requests it
++	 */
++	if (host->pdata->glamo_mci_use_slow)
++		if ((host->pdata->glamo_mci_use_slow)())
++			__glamo_mci_fix_card_div(host, host->clk_div *
++								 sd_slow_ratio);
++		else
++			__glamo_mci_fix_card_div(host, host->clk_div);
++	else
++		__glamo_mci_fix_card_div(host, host->clk_div);
+ 
+ 	if (glamo_mci_send_command(host, cmd))
+ 		goto bail;
+diff --git a/include/linux/glamofb.h b/include/linux/glamofb.h
+index bb1a398..ca63355 100644
+--- a/include/linux/glamofb.h
++++ b/include/linux/glamofb.h
+@@ -31,6 +31,8 @@ struct glamofb_platform_data {
+ 	/* glamo mmc platform specific info */
+ 	void		(*glamo_set_mci_power)(unsigned char power_mode,
+ 				     unsigned short vdd);
++	/* glamo-mci asking if it should use the slow clock to card */
++	int		(*glamo_mci_use_slow)(void);
+ 	int		(*glamo_irq_is_wired)(void);
+ 	void		(*mci_suspending)(struct platform_device *dev);
+ 	int		(*mci_all_dependencies_resumed)(struct platform_device *dev);
+-- 
+1.5.6.3
+