From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pg0-x241.google.com ([2607:f8b0:400e:c05::241]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cljmF-0006dx-Is for barebox@lists.infradead.org; Wed, 08 Mar 2017 22:09:49 +0000 Received: by mail-pg0-x241.google.com with SMTP id b5so4631974pgg.1 for ; Wed, 08 Mar 2017 14:09:27 -0800 (PST) From: Andrey Smirnov Date: Wed, 8 Mar 2017 14:08:51 -0800 Message-Id: <20170308220909.4560-3-andrew.smirnov@gmail.com> In-Reply-To: <20170308220909.4560-1-andrew.smirnov@gmail.com> References: <20170308220909.4560-1-andrew.smirnov@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 02/20] regmap: Implement syscon_node_to_regmap() To: barebox@lists.infradead.org Cc: Andrey Smirnov Implement syscon_node_to_regmap() to simplify porting kernel code. Signed-off-by: Andrey Smirnov --- drivers/mfd/syscon.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++- include/mfd/syscon.h | 8 ++++++++ 2 files changed, 61 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c index 6ef30ce..957d9a7 100644 --- a/drivers/mfd/syscon.c +++ b/drivers/mfd/syscon.c @@ -28,6 +28,34 @@ struct syscon { struct device_node *np; void __iomem *base; struct list_head list; + struct regmap *regmap; +}; + +static int syscon_reg_write(void *context, unsigned int reg, + unsigned int val) +{ + struct syscon *syscon = context; + writel(val, syscon->base + reg); + return 0; +} + +static int syscon_reg_read(void *context, unsigned int reg, + unsigned int *val) +{ + struct syscon *syscon = context; + *val = readl(syscon->base + reg); + return 0; +} + +static const struct regmap_bus syscon_regmap_bus = { + .reg_write = syscon_reg_write, + .reg_read = syscon_reg_read, +}; + +static const struct regmap_config syscon_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, }; static struct syscon *of_syscon_register(struct device_node *np) @@ -51,6 +79,10 @@ static struct syscon *of_syscon_register(struct device_node *np) list_add_tail(&syscon->list, &syscon_list); + syscon->regmap = regmap_init(NULL, + &syscon_regmap_bus, + syscon, + &syscon_regmap_config); return syscon; err_map: @@ -58,7 +90,7 @@ err_map: return ERR_PTR(ret); } -static void __iomem *syscon_node_to_base(struct device_node *np) +static struct syscon *node_to_syscon(struct device_node *np) { struct syscon *entry, *syscon = NULL; @@ -74,6 +106,16 @@ static void __iomem *syscon_node_to_base(struct device_node *np) if (IS_ERR(syscon)) return ERR_CAST(syscon); + return syscon; +} + +static void __iomem *syscon_node_to_base(struct device_node *np) +{ + struct syscon *syscon = node_to_syscon(np); + + if (IS_ERR(syscon)) + return ERR_CAST(syscon); + return syscon->base; } @@ -108,6 +150,16 @@ void __iomem *syscon_base_lookup_by_phandle(struct device_node *np, return syscon_node_to_base(syscon_np); } +struct regmap *syscon_node_to_regmap(struct device_node *np) +{ + struct syscon *syscon = node_to_syscon(np); + + if (IS_ERR(syscon)) + return ERR_CAST(syscon); + + return syscon->regmap; +} + static int syscon_probe(struct device_d *dev) { struct syscon *syscon; diff --git a/include/mfd/syscon.h b/include/mfd/syscon.h index 651d4c2..63b893e 100644 --- a/include/mfd/syscon.h +++ b/include/mfd/syscon.h @@ -14,10 +14,13 @@ #ifndef __MFD_SYSCON_H__ #define __MFD_SYSCON_H__ +#include + #ifdef CONFIG_MFD_SYSCON void __iomem *syscon_base_lookup_by_pdevname(const char *s); void __iomem *syscon_base_lookup_by_phandle (struct device_node *np, const char *property); +struct regmap *syscon_node_to_regmap(struct device_node *np); #else static inline void __iomem *syscon_base_lookup_by_pdevname(const char *s) { @@ -29,6 +32,11 @@ static inline void __iomem *syscon_base_lookup_by_phandle { return ERR_PTR(-ENOSYS); } + +static inline struct regmap *syscon_node_to_regmap(struct device_node *np) +{ + return ERR_PTR(-ENOSYS); +} #endif #endif -- 2.9.3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox