Use the syscon driver to parse out the reboot register map and issue reboot via the regmap function. Signed-off-by: Feng Kan <fkan@xxxxxxx> --- drivers/power/reset/xgene-reboot.c | 75 +++++++++--------------------------- 1 files changed, 19 insertions(+), 56 deletions(-) diff --git a/drivers/power/reset/xgene-reboot.c b/drivers/power/reset/xgene-reboot.c index ecd55f8..660ed8a 100644 --- a/drivers/power/reset/xgene-reboot.c +++ b/drivers/power/reset/xgene-reboot.c @@ -24,80 +24,43 @@ * For system shutdown, this is board specify. If a board designer * implements GPIO shutdown, use the gpio-poweroff.c driver. */ -#include <linux/io.h> #include <linux/of_device.h> #include <linux/of_address.h> #include <linux/platform_device.h> -#include <linux/stat.h> -#include <linux/slab.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> +#include <linux/reboot.h> #include <asm/system_misc.h> -struct xgene_reboot_context { - struct platform_device *pdev; - void *csr; - u32 mask; -}; +#define SCU_SRST 0x14 -static struct xgene_reboot_context *xgene_restart_ctx; - -static void xgene_restart(char str, const char *cmd) +static void xgene_restart(enum reboot_mode reboot_mode, const char *cmd) { - struct xgene_reboot_context *ctx = xgene_restart_ctx; unsigned long timeout; + struct regmap *map; + unsigned int ret; + struct device_node *dn; + + dn = of_find_node_by_name(NULL, "reboot"); + map = syscon_regmap_lookup_by_phandle(dn, "apm,scu"); + if (IS_ERR(map)) { + ret = PTR_ERR(map); + pr_err("Reboot driver failed to get scu regmap: %d\n", ret); + return; + } - /* Issue the reboot */ - if (ctx) - writel(ctx->mask, ctx->csr); + regmap_write(map, SCU_SRST, 0x1); timeout = jiffies + HZ; while (time_before(jiffies, timeout)) cpu_relax(); - dev_emerg(&ctx->pdev->dev, "Unable to restart system\n"); + pr_emerg("Unable to restart system\n"); } -static int xgene_reboot_probe(struct platform_device *pdev) +static int __init xgene_reboot_init(void) { - struct xgene_reboot_context *ctx; - - ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); - if (!ctx) { - dev_err(&pdev->dev, "out of memory for context\n"); - return -ENODEV; - } - - ctx->csr = of_iomap(pdev->dev.of_node, 0); - if (!ctx->csr) { - devm_kfree(&pdev->dev, ctx); - dev_err(&pdev->dev, "can not map resource\n"); - return -ENODEV; - } - - if (of_property_read_u32(pdev->dev.of_node, "mask", &ctx->mask)) - ctx->mask = 0xFFFFFFFF; - - ctx->pdev = pdev; arm_pm_restart = xgene_restart; - xgene_restart_ctx = ctx; - return 0; } - -static struct of_device_id xgene_reboot_of_match[] = { - { .compatible = "apm,xgene-reboot" }, - {} -}; - -static struct platform_driver xgene_reboot_driver = { - .probe = xgene_reboot_probe, - .driver = { - .name = "xgene-reboot", - .of_match_table = xgene_reboot_of_match, - }, -}; - -static int __init xgene_reboot_init(void) -{ - return platform_driver_register(&xgene_reboot_driver); -} device_initcall(xgene_reboot_init); -- 1.7.6.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html