diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0043-MISC-bcm2835-smi-use-clock-manager-and-fix-reload-is.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/950-0043-MISC-bcm2835-smi-use-clock-manager-and-fix-reload-is.patch | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0043-MISC-bcm2835-smi-use-clock-manager-and-fix-reload-is.patch b/target/linux/brcm2708/patches-4.9/950-0043-MISC-bcm2835-smi-use-clock-manager-and-fix-reload-is.patch deleted file mode 100644 index 69f68c79ed..0000000000 --- a/target/linux/brcm2708/patches-4.9/950-0043-MISC-bcm2835-smi-use-clock-manager-and-fix-reload-is.patch +++ /dev/null @@ -1,169 +0,0 @@ -From 6bc6d433aaed4d4a5d5be44e70d9de865a850048 Mon Sep 17 00:00:00 2001 -From: Martin Sperl <kernel@martin.sperl.org> -Date: Tue, 26 Apr 2016 14:59:21 +0000 -Subject: [PATCH] MISC: bcm2835: smi: use clock manager and fix reload issues - -Use clock manager instead of self-made clockmanager. - -Also fix some error paths that showd up during development -(especially missing release of dma resources on rmmod) - -Signed-off-by: Martin Sperl <kernel@martin.sperl.org> ---- - drivers/misc/bcm2835_smi.c | 86 +++++++++++++++------------------------------- - 1 file changed, 28 insertions(+), 58 deletions(-) - ---- a/drivers/misc/bcm2835_smi.c -+++ b/drivers/misc/bcm2835_smi.c -@@ -34,6 +34,7 @@ - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -+#include <linux/clk.h> - #include <linux/kernel.h> - #include <linux/module.h> - #include <linux/of.h> -@@ -62,7 +63,7 @@ - struct bcm2835_smi_instance { - struct device *dev; - struct smi_settings settings; -- __iomem void *smi_regs_ptr, *cm_smi_regs_ptr; -+ __iomem void *smi_regs_ptr; - dma_addr_t smi_regs_busaddr; - - struct dma_chan *dma_chan; -@@ -72,8 +73,7 @@ struct bcm2835_smi_instance { - - struct scatterlist buffer_sgl; - -- int clock_source; -- int clock_divisor; -+ struct clk *clk; - - /* Sometimes we are called into in an atomic context (e.g. by - JFFS2 + MTD) so we can't use a mutex */ -@@ -82,42 +82,6 @@ struct bcm2835_smi_instance { - - /**************************************************************************** - * --* SMI clock manager setup --* --***************************************************************************/ -- --static inline void write_smi_cm_reg(struct bcm2835_smi_instance *inst, -- u32 val, unsigned reg) --{ -- writel(CM_PWD | val, inst->cm_smi_regs_ptr + reg); --} -- --static inline u32 read_smi_cm_reg(struct bcm2835_smi_instance *inst, -- unsigned reg) --{ -- return readl(inst->cm_smi_regs_ptr + reg); --} -- --static void smi_setup_clock(struct bcm2835_smi_instance *inst) --{ -- dev_dbg(inst->dev, "Setting up clock..."); -- /* Disable SMI clock and wait for it to stop. */ -- write_smi_cm_reg(inst, 0, CM_SMI_CTL); -- while (read_smi_cm_reg(inst, CM_SMI_CTL) & CM_SMI_CTL_BUSY) -- ; -- -- write_smi_cm_reg(inst, (inst->clock_divisor << CM_SMI_DIV_DIVI_OFFS), -- CM_SMI_DIV); -- write_smi_cm_reg(inst, (inst->clock_source << CM_SMI_CTL_SRC_OFFS), -- CM_SMI_CTL); -- -- /* Enable the clock */ -- write_smi_cm_reg(inst, (inst->clock_source << CM_SMI_CTL_SRC_OFFS) | -- CM_SMI_CTL_ENAB, CM_SMI_CTL); --} -- --/**************************************************************************** --* - * SMI peripheral setup - * - ***************************************************************************/ -@@ -894,42 +858,40 @@ static int bcm2835_smi_probe(struct plat - struct device_node *node = dev->of_node; - struct resource *ioresource; - struct bcm2835_smi_instance *inst; -+ const __be32 *addr; - -+ /* We require device tree support */ -+ if (!node) -+ return -EINVAL; - /* Allocate buffers and instance data */ -- - inst = devm_kzalloc(dev, sizeof(struct bcm2835_smi_instance), - GFP_KERNEL); -- - if (!inst) - return -ENOMEM; - - inst->dev = dev; - spin_lock_init(&inst->transaction_lock); - -- /* We require device tree support */ -- if (!node) -- return -EINVAL; -- - ioresource = platform_get_resource(pdev, IORESOURCE_MEM, 0); - inst->smi_regs_ptr = devm_ioremap_resource(dev, ioresource); -- ioresource = platform_get_resource(pdev, IORESOURCE_MEM, 1); -- inst->cm_smi_regs_ptr = devm_ioremap_resource(dev, ioresource); -- inst->smi_regs_busaddr = be32_to_cpu( -- *of_get_address(node, 0, NULL, NULL)); -- of_property_read_u32(node, -- "brcm,smi-clock-source", -- &inst->clock_source); -- of_property_read_u32(node, -- "brcm,smi-clock-divisor", -- &inst->clock_divisor); -+ if (IS_ERR(inst->smi_regs_ptr)) { -+ err = PTR_ERR(inst->smi_regs_ptr); -+ goto err; -+ } -+ addr = of_get_address(node, 0, NULL, NULL); -+ inst->smi_regs_busaddr = be32_to_cpu(addr); - - err = bcm2835_smi_dma_setup(inst); - if (err) -- return err; -+ goto err; - -- /* Finally, do peripheral setup */ -+ /* request clock */ -+ inst->clk = devm_clk_get(dev, NULL); -+ if (!inst->clk) -+ goto err; -+ clk_prepare_enable(inst->clk); - -- smi_setup_clock(inst); -+ /* Finally, do peripheral setup */ - smi_setup_regs(inst); - - platform_set_drvdata(pdev, inst); -@@ -937,6 +899,9 @@ static int bcm2835_smi_probe(struct plat - dev_info(inst->dev, "initialised"); - - return 0; -+err: -+ kfree(inst); -+ return err; - } - - /**************************************************************************** -@@ -950,6 +915,11 @@ static int bcm2835_smi_remove(struct pla - struct bcm2835_smi_instance *inst = platform_get_drvdata(pdev); - struct device *dev = inst->dev; - -+ dmaengine_terminate_all(inst->dma_chan); -+ dma_release_channel(inst->dma_chan); -+ -+ clk_disable_unprepare(inst->clk); -+ - dev_info(dev, "SMI device removed - OK"); - return 0; - } |