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| author | Fabio Estevam <festevam@gmail.com> | 2020-09-17 03:41:16 +0300 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2020-09-22 09:08:00 +0300 |
| commit | d54debc72f5f836917c957dce610ec50546ec158 (patch) | |
| tree | 1292d0939b97a0586fcfcab81e7a32ff7591a702 | |
| parent | 94b2bec1b0e054b27b0a0b5f52a0cd55c83340f4 (diff) | |
| download | linux-d54debc72f5f836917c957dce610ec50546ec158.tar.xz | |
ARM: imx27: Retrieve the CCM base address from devicetree
Now that imx27 has been converted to a devicetree-only platform,
retrieve the CCM base address from devicetree.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
| -rw-r--r-- | arch/arm/mach-imx/pm-imx27.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/arm/mach-imx/pm-imx27.c b/arch/arm/mach-imx/pm-imx27.c index d943535566c8..020e6deb67c8 100644 --- a/arch/arm/mach-imx/pm-imx27.c +++ b/arch/arm/mach-imx/pm-imx27.c @@ -7,6 +7,7 @@ * modify it under the terms of the GNU General Public License. */ +#include <linux/of_address.h> #include <linux/kernel.h> #include <linux/suspend.h> #include <linux/io.h> @@ -15,13 +16,20 @@ static int mx27_suspend_enter(suspend_state_t state) { + void __iomem *ccm_base; + struct device_node *np; u32 cscr; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx27-ccm"); + ccm_base = of_iomap(np, 0); + BUG_ON(!ccm_base); + switch (state) { case PM_SUSPEND_MEM: /* Clear MPEN and SPEN to disable MPLL/SPLL */ - cscr = imx_readl(MX27_IO_ADDRESS(MX27_CCM_BASE_ADDR)); + cscr = imx_readl(ccm_base); cscr &= 0xFFFFFFFC; - imx_writel(cscr, MX27_IO_ADDRESS(MX27_CCM_BASE_ADDR)); + imx_writel(cscr, ccm_base); /* Executes WFI */ cpu_do_idle(); break; |