[PATCH] powerpc/fsl: add power_off support for fsl platform
Dongsheng Wang
dongsheng.wang at freescale.com
Wed Feb 4 17:47:01 AEDT 2015
From: Wang Dongsheng <dongsheng.wang at freescale.com>
QIXIS System Logic FPGA support to manage system power. So we
through QIXIS to power off freescale SOC.
Signed-off-by: Wang Dongsheng <dongsheng.wang at freescale.com>
diff --git a/arch/powerpc/platforms/85xx/corenet_generic.c b/arch/powerpc/platforms/85xx/corenet_generic.c
index 1f309cc..e1a1eb5 100644
--- a/arch/powerpc/platforms/85xx/corenet_generic.c
+++ b/arch/powerpc/platforms/85xx/corenet_generic.c
@@ -81,6 +81,8 @@ void __init corenet_gen_setup_arch(void)
pr_info("%s board\n", ppc_md.name);
mpc85xx_qe_init();
+
+ ppc_md_fixup();
}
static const struct of_device_id of_device_ids[] = {
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 99269c0..6de9f1b 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -215,6 +215,54 @@ void fsl_rstcr_restart(char *cmd)
}
#endif
+#define QIXIS_PWR_CTL2 0x21
+#define QIXIS_PWR_CTL2_PWR 0x80
+static void fsl_power_off(void)
+{
+ struct device_node *pixis_node;
+ void __iomem *pixis;
+ u32 pwroff_offset, value;
+
+ pixis_node = of_find_compatible_node(NULL, NULL, "fsl,fpga-qixis");
+ if (!pixis_node) {
+ pr_err("%s: Missing pixis node\n", __func__);
+ return;
+ }
+
+ pwroff_offset = QIXIS_PWR_CTL2;
+ value = QIXIS_PWR_CTL2_PWR;
+
+ pixis = of_iomap(pixis_node, 0);
+ of_node_put(pixis_node);
+ if (!pixis) {
+ pr_err("%s: Could not map pixis registers\n", __func__);
+ return;
+ }
+
+ local_irq_disable();
+
+ setbits8(pixis + pwroff_offset, value);
+
+ iounmap(pixis);
+
+ while (1)
+ ;
+}
+
+void ppc_md_fixup(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,fpga-qixis");
+ if (!np)
+ return;
+
+ of_node_put(np);
+
+ pm_power_off = fsl_power_off;
+ ppc_md.halt = fsl_power_off;
+}
+
#if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
struct platform_diu_data_ops diu_ops;
EXPORT_SYMBOL(diu_ops);
diff --git a/arch/powerpc/sysdev/fsl_soc.h b/arch/powerpc/sysdev/fsl_soc.h
index 4c5a19e..ca90e24 100644
--- a/arch/powerpc/sysdev/fsl_soc.h
+++ b/arch/powerpc/sysdev/fsl_soc.h
@@ -21,6 +21,8 @@ struct device_node;
extern void fsl_rstcr_restart(char *cmd);
+void ppc_md_fixup(void);
+
/* The different ports that the DIU can be connected to */
enum fsl_diu_monitor_port {
FSL_DIU_PORT_DVI, /* DVI */
--
2.1.0.27.g96db324
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