[PATCH 03/13] ARM: imx27: Retrieve the SYSCTRL base address from devicetree
flat view
STALE2204d
From: Fabio Estevam <festevam@gmail.com>
Date: 2020-09-16 20:57:24
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Now that imx27 has been converted to a devicetree-only platform, retrieve the SYSCTRL base address from devicetree. Signed-off-by: Fabio Estevam <festevam@gmail.com> --- arch/arm/mach-imx/cpu-imx27.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-imx/cpu-imx27.c b/arch/arm/mach-imx/cpu-imx27.c
index a969aa71b60f..2c8430f34556 100644
--- a/arch/arm/mach-imx/cpu-imx27.c
+++ b/arch/arm/mach-imx/cpu-imx27.c@@ -9,6 +9,7 @@ */ #include <linux/io.h> +#include <linux/of_address.h> #include <linux/module.h> #include "hardware.h"
@@ -20,13 +21,19 @@ static int mx27_cpu_partnumber; static int mx27_read_cpu_rev(void) { + void __iomem *sysctrl_base; + struct device_node *np; u32 val; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx27-sysctrl"); + sysctrl_base = of_iomap(np, 0); + BUG_ON(!sysctrl_base); /* * now we have access to the IO registers. As we need * the silicon revision very early we read it here to * avoid any further hooks */ - val = imx_readl(MX27_IO_ADDRESS(MX27_SYSCTRL_BASE_ADDR + SYS_CHIP_ID)); + val = imx_readl(sysctrl_base + SYS_CHIP_ID); mx27_cpu_partnumber = (int)((val >> 12) & 0xFFFF);
--
2.17.1
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