ARM: imx27: Retrieve the CCM base address from devicetree (d54debc7) · Commits · 戴 / test

Now that imx27 has been converted to a devicetree-only platform, retrieve the CCM base address from devicetree. Signed-off-by:

arch/arm/mach-imx/pm-imx27.c

+10 −2

Original line number	Diff line number	Diff line
		@@ -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;