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Diffstat (limited to 'meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0124-RPC-Hyperflash-Add-devicetree-support.patch')
-rw-r--r--meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0124-RPC-Hyperflash-Add-devicetree-support.patch219
1 files changed, 219 insertions, 0 deletions
diff --git a/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0124-RPC-Hyperflash-Add-devicetree-support.patch b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0124-RPC-Hyperflash-Add-devicetree-support.patch
new file mode 100644
index 0000000..f347d47
--- /dev/null
+++ b/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0124-RPC-Hyperflash-Add-devicetree-support.patch
@@ -0,0 +1,219 @@
+From 466608ee2217ce02df6df977a35c4afa6ee1e350 Mon Sep 17 00:00:00 2001
+From: Dmitry Shifrin <dmitry.shifrin@cogentembedded.com>
+Date: Wed, 4 Apr 2018 12:29:47 +0300
+Subject: [PATCH 1/2] RPC: Hyperflash: Add devicetree support
+
+Signed-off-by: Dmitry Shifrin <dmitry.shifrin@cogentembedded.com>
+---
+ drivers/mtd/rpc_hyperflash.c | 142 +++++++++++++++++++++++--------------------
+ 1 file changed, 77 insertions(+), 65 deletions(-)
+
+diff --git a/drivers/mtd/rpc_hyperflash.c b/drivers/mtd/rpc_hyperflash.c
+index cf4d56e..c15e520 100644
+--- a/drivers/mtd/rpc_hyperflash.c
++++ b/drivers/mtd/rpc_hyperflash.c
+@@ -15,8 +15,10 @@
+ #include <linux/mtd/mtd.h>
+ #include <linux/mtd/partitions.h>
+ #include <linux/of.h>
++#include <linux/clk.h>
+ #include <linux/rwsem.h>
+ #include <linux/slab.h>
++#include <linux/platform_device.h>
+
+ /* RPC */
+ #define RPC_BASE 0xEE200000
+@@ -156,10 +158,9 @@
+
+ struct rpc_info {
+ struct rw_semaphore lock;
++ struct clk *clk;
+ void __iomem *rpc_base;
+ void __iomem *flash_base;
+- struct resource *rpc_res;
+- struct resource *flash_res;
+ u32 flash_id;
+ struct mtd_info mtd;
+ };
+@@ -243,8 +244,6 @@ enum rpc_hf_size {
+ RPC_HF_SIZE_64BIT = RPC_SMENR_SPIDE(0xF),
+ };
+
+-struct rpc_info *rpc_info;
+-
+ static void rpc_hf_mode_man(struct rpc_info *info)
+ {
+ rpc_wait_tend(info);
+@@ -861,8 +860,8 @@ static int rpc_hf_init_mtd(struct rpc_info *info)
+ rpc_hf_read_reg(info, 0x27 << 1, data, RPC_HF_SIZE_16BIT);
+ size = 1 << data[0];
+
+- if (size > resource_size(info->flash_res))
+- size = resource_size(info->flash_res);
++ if (size > RPC_FLASH_SIZE)
++ size = RPC_FLASH_SIZE;
+
+ if (size & (RPC_HF_ERASE_SIZE - 1)) {
+ retval = -EINVAL;
+@@ -891,86 +890,99 @@ static int rpc_hf_init_mtd(struct rpc_info *info)
+ return retval;
+ }
+
+-static int rpc_flash_init(void)
++static int rpc_flash_probe(struct platform_device *pdev)
+ {
+- struct rpc_info *info;
++ struct rpc_info *rpc;
+ struct resource *res;
+- void __iomem *base;
+- int retval = -ENODEV;
+-
+- if (!of_machine_is_compatible("renesas,r8a7795"))
+- return -ENODEV;
++ int ret;
+
+- info = kzalloc(sizeof(*info), GFP_KERNEL);
+- if (!info)
++ rpc = devm_kzalloc(&pdev->dev, sizeof(*rpc), GFP_KERNEL);
++ if (!rpc)
+ return -ENOMEM;
+
+- res = request_mem_region(RPC_BASE, RPC_SIZE, "RPC");
+- if (!res)
+- goto out_info;
++ /* ...get memory */
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ rpc->rpc_base = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(rpc->rpc_base)) {
++ dev_err(&pdev->dev, "cannot get resources\n");
++ ret = PTR_ERR(rpc->rpc_base);
++ goto error;
++ }
+
+- info->rpc_res = res;
+- base = ioremap(res->start, resource_size(res));
+- if (!base)
+- goto out_rpc_res;
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
++ rpc->flash_base = devm_ioremap_resource(&pdev->dev, res);
++ if (IS_ERR(rpc->flash_base)) {
++ dev_err(&pdev->dev, "cannot get resources\n");
++ ret = PTR_ERR(rpc->flash_base);
++ goto error;
++ }
+
+- info->rpc_base = base;
+- res = request_mem_region(RPC_FLASH_BASE, RPC_FLASH_SIZE, "RPC-ext");
+- if (!res)
+- goto out_rpc_base;
++ /* ...get clk */
++ rpc->clk = devm_clk_get(&pdev->dev, NULL);
++ if (IS_ERR(rpc->clk)) {
++ dev_err(&pdev->dev, "cannot get clock\n");
++ ret = PTR_ERR(rpc->clk);
++ goto error;
++ }
+
+- info->flash_res = res;
+- base = ioremap(res->start, resource_size(res));
+- if (!base)
+- goto out_flash_res;
++ /* ... enable clk */
++ ret = clk_prepare_enable(rpc->clk);
++ if (ret) {
++ dev_err(&pdev->dev, "cannot prepare clock\n");
++ goto error;
++ }
++
++ platform_set_drvdata(pdev, rpc);
+
+- info->flash_base = base;
+- retval = rpc_hf_init_mtd(info);
+- if (retval)
+- goto out_flash_base;
++ mtd_set_of_node(&rpc->mtd, pdev->dev.of_node);
++ ret = rpc_hf_init_mtd(rpc);
++ if (ret) {
++ dev_err(&pdev->dev, "mtd device register error.\n");
++ goto error_clk_disable;
++ }
+
+- pr_info("HyperFlash Id: %x\n", info->flash_id);
++ dev_info(&pdev->dev, "HyperFlash Id: %x\n", rpc->flash_id);
+
+- rpc_info = info;
+ return 0;
+
+-out_flash_base:
+- iounmap(info->flash_base);
+-out_flash_res:
+- release_mem_region(info->flash_res->start,
+- resource_size(info->flash_res));
+-out_rpc_base:
+- iounmap(info->rpc_base);
+-out_rpc_res:
+- release_mem_region(info->rpc_res->start,
+- resource_size(info->rpc_res));
+-out_info:
+- kfree(info);
+- return retval;
++
++error_clk_disable:
++ clk_disable_unprepare(rpc->clk);
++error:
++ return ret;
+ }
+
+-static void rpc_flash_exit(void)
++static int rpc_flash_exit(struct platform_device *pdev)
+ {
+- struct rpc_info *info = rpc_info;
++ struct rpc_info *rpc = platform_get_drvdata(pdev);
++
++ /* HW shutdown */
++ clk_disable_unprepare(rpc->clk);
++ mtd_device_unregister(&rpc->mtd);
++ return 0;
++}
+
+- if (!info)
+- return;
+
+- rpc_info = NULL;
++static const struct of_device_id rpc_flash_of_match[] = {
++ { .compatible = "renesas,rpc-hyperflash-r8a7798" },
++ { .compatible = "renesas,rpc-hyperflash-r8a7797" },
++ { },
++};
+
+- mtd_device_unregister(&info->mtd);
++MODULE_DEVICE_TABLE(of, rpc_flash_of_match);
+
+- iounmap(info->flash_base);
+- release_mem_region(info->flash_res->start,
+- resource_size(info->flash_res));
+- iounmap(info->rpc_base);
+- release_mem_region(info->rpc_res->start,
+- resource_size(info->rpc_res));
+- kfree(info);
+-}
++/* platform driver interface */
++static struct platform_driver rpc_flash_platform_driver = {
++ .probe = rpc_flash_probe,
++ .remove = rpc_flash_exit,
++ .driver = {
++ .owner = THIS_MODULE,
++ .name = "rpc",
++ .of_match_table = of_match_ptr(rpc_flash_of_match),
++ },
++};
+
+-module_init(rpc_flash_init);
+-module_exit(rpc_flash_exit);
++module_platform_driver(rpc_flash_platform_driver);
+
+ MODULE_LICENSE("GPL v2");
+ MODULE_DESCRIPTION("Renesas RPC HyperFlash MTD driver");
+--
+2.7.4
+