diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.26/1230-add-glamo-mci-slower-clocking-dynamic-switching.patc.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches-2.6.26/1230-add-glamo-mci-slower-clocking-dynamic-switching.patc.patch | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.26/1230-add-glamo-mci-slower-clocking-dynamic-switching.patc.patch b/target/linux/s3c24xx/patches-2.6.26/1230-add-glamo-mci-slower-clocking-dynamic-switching.patc.patch deleted file mode 100755 index 74442df..0000000 --- a/target/linux/s3c24xx/patches-2.6.26/1230-add-glamo-mci-slower-clocking-dynamic-switching.patc.patch +++ /dev/null @@ -1,120 +0,0 @@ -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 - |