From patchwork Wed May 27 06:41:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ovidiu Panait X-Patchwork-Id: 246660 List-Id: U-Boot discussion From: ovidiu.panait at windriver.com (Ovidiu Panait) Date: Wed, 27 May 2020 09:41:36 +0300 Subject: [PATCH 1/5] dm: core: Fix devfdt_get_addr_ptr return value Message-ID: <20200527064140.21391-1-ovidiu.panait@windriver.com> According to the description of devfdt_get_addr_ptr, this function should return NULL on failure, but currently it returns (void *)FDT_ADDR_T_NONE. This is also a problem because there are two definitions for dev_read_addr_ptr, depending on CONFIG_DM_DEV_READ_INLINE: 1. one returning NULL on failure (drivers/core/read.c): void *dev_read_addr_ptr(const struct udevice *dev) { fdt_addr_t addr = dev_read_addr(dev); return (addr == FDT_ADDR_T_NONE) ? NULL : map_sysmem(addr, 0); } 2. another one, which is a wrapper over devfdt_get_addr_ptr, returning (void *)FDT_ADDR_T_NONE (include/dm/read.h) static inline void *dev_read_addr_ptr(const struct udevice *dev) { return devfdt_get_addr_ptr(dev); } Currently, some drivers which make use of devfdt_get_addr_ptr check the return value for NULL: drivers/i2c/mvtwsi.c drivers/i2c/designware_i2c.c drivers/usb/host/ehci-zynq.c while others check the return value for (void *)FDT_ADDR_T_NONE: drivers/pinctrl/mvebu/pinctrl-mvebu.c drivers/timer/ast_timer.c drivers/watchdog/ast_wdt.c Fix this by making devfdt_get_addr_ptr return NULL on failure, as described in the function comments. Also, update the drivers currently checking (void *)FDT_ADDR_T_NONE to check for NULL. Signed-off-by: Ovidiu Panait Reviewed-by: Matthias Brugger Reviewed-by: C?dric Le Goater Tested-by: Simon Glass --- drivers/clk/aspeed/clk_ast2500.c | 4 ++-- drivers/core/fdtaddr.c | 5 ++++- drivers/i2c/ast_i2c.c | 4 ++-- drivers/pinctrl/mvebu/pinctrl-mvebu.c | 2 +- drivers/timer/ast_timer.c | 4 ++-- drivers/watchdog/ast_wdt.c | 4 ++-- 6 files changed, 13 insertions(+), 10 deletions(-) diff --git a/drivers/clk/aspeed/clk_ast2500.c b/drivers/clk/aspeed/clk_ast2500.c index ccfeded30c..284f5f58d6 100644 --- a/drivers/clk/aspeed/clk_ast2500.c +++ b/drivers/clk/aspeed/clk_ast2500.c @@ -498,8 +498,8 @@ static int ast2500_clk_ofdata_to_platdata(struct udevice *dev) struct ast2500_clk_priv *priv = dev_get_priv(dev); priv->scu = devfdt_get_addr_ptr(dev); - if (IS_ERR(priv->scu)) - return PTR_ERR(priv->scu); + if (!priv->scu) + return -EINVAL; return 0; } diff --git a/drivers/core/fdtaddr.c b/drivers/core/fdtaddr.c index dfcb868f65..044d5871b0 100644 --- a/drivers/core/fdtaddr.c +++ b/drivers/core/fdtaddr.c @@ -14,6 +14,7 @@ #include #include #include +#include DECLARE_GLOBAL_DATA_PTR; @@ -154,7 +155,9 @@ fdt_addr_t devfdt_get_addr(const struct udevice *dev) void *devfdt_get_addr_ptr(const struct udevice *dev) { - return (void *)(uintptr_t)devfdt_get_addr_index(dev, 0); + fdt_addr_t addr = devfdt_get_addr_index(dev, 0); + + return (addr == FDT_ADDR_T_NONE) ? NULL : map_sysmem(addr, 0); } void *devfdt_remap_addr_index(const struct udevice *dev, int index) diff --git a/drivers/i2c/ast_i2c.c b/drivers/i2c/ast_i2c.c index 214362d04b..253e653666 100644 --- a/drivers/i2c/ast_i2c.c +++ b/drivers/i2c/ast_i2c.c @@ -93,8 +93,8 @@ static int ast_i2c_ofdata_to_platdata(struct udevice *dev) int ret; priv->regs = devfdt_get_addr_ptr(dev); - if (IS_ERR(priv->regs)) - return PTR_ERR(priv->regs); + if (!priv->regs) + return -EINVAL; ret = clk_get_by_index(dev, 0, &priv->clk); if (ret < 0) { diff --git a/drivers/pinctrl/mvebu/pinctrl-mvebu.c b/drivers/pinctrl/mvebu/pinctrl-mvebu.c index 2206e958ec..ac0377e796 100644 --- a/drivers/pinctrl/mvebu/pinctrl-mvebu.c +++ b/drivers/pinctrl/mvebu/pinctrl-mvebu.c @@ -194,7 +194,7 @@ int mvebu_pinctl_probe(struct udevice *dev) } priv->base_reg = devfdt_get_addr_ptr(dev); - if (priv->base_reg == (void *)FDT_ADDR_T_NONE) { + if (!priv->base_reg) { debug("%s: Failed to get base address\n", __func__); return -EINVAL; } diff --git a/drivers/timer/ast_timer.c b/drivers/timer/ast_timer.c index 3838601f54..9f28cbfcf9 100644 --- a/drivers/timer/ast_timer.c +++ b/drivers/timer/ast_timer.c @@ -65,8 +65,8 @@ static int ast_timer_ofdata_to_platdata(struct udevice *dev) struct ast_timer_priv *priv = dev_get_priv(dev); priv->regs = devfdt_get_addr_ptr(dev); - if (IS_ERR(priv->regs)) - return PTR_ERR(priv->regs); + if (!priv->regs) + return -EINVAL; priv->tmc = ast_get_timer_counter(priv->regs, AST_TICK_TIMER); diff --git a/drivers/watchdog/ast_wdt.c b/drivers/watchdog/ast_wdt.c index 7e11465a57..a21f9a4d14 100644 --- a/drivers/watchdog/ast_wdt.c +++ b/drivers/watchdog/ast_wdt.c @@ -91,8 +91,8 @@ static int ast_wdt_ofdata_to_platdata(struct udevice *dev) struct ast_wdt_priv *priv = dev_get_priv(dev); priv->regs = devfdt_get_addr_ptr(dev); - if (IS_ERR(priv->regs)) - return PTR_ERR(priv->regs); + if (!priv->regs) + return -EINVAL; return 0; }