clk: msm: clock-osm: add scm_io_write calls to program secure registers

Use secure IO write calls to program the APM crossover corner
and registers 47 and 48 of OSM sequencer architectural space.
Values for these registers reside in the HLOS, but must be
programmed from a secure domain.

Change-Id: I961bde48822adcbfbbb28130f2872104de5c11ce
CRs-Fixed: 992982
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>

drivers/clk/msm/clock-osm.c

@@ -34,6 +34,7 @@
 #include <linux/regulator/driver.h>
 #include <linux/uaccess.h>
 
+#include <soc/qcom/scm.h>
 #include <soc/qcom/clock-pll.h>
 #include <soc/qcom/clock-local2.h>
 #include <soc/qcom/clock-alpha-pll.h>
@@ -303,26 +304,22 @@ static inline void clk_osm_masked_write_reg(struct clk_osm *c, u32 val,
 {
 	u32 val2, orig_val;
 
-	val2 = orig_val = readl_relaxed((char *)c->vbases[OSM_BASE] + offset
-			+ c->cluster_num * OSM_CORE_TABLE_SIZE);
+	val2 = orig_val = readl_relaxed((char *)c->vbases[OSM_BASE] + offset);
 	val2 &= ~mask;
 	val2 |= val & mask;
 
 	if (val2 != orig_val)
-		writel_relaxed(val2, (char *)c->vbases[OSM_BASE] + offset
-			+ c->cluster_num * OSM_CORE_TABLE_SIZE);
+		writel_relaxed(val2, (char *)c->vbases[OSM_BASE] + offset);
 }
 
 static inline void clk_osm_write_reg(struct clk_osm *c, u32 val, u32 offset)
 {
-	writel_relaxed(val , (char *)c->vbases[OSM_BASE] + offset
-		       + c->cluster_num * OSM_CORE_TABLE_SIZE);
+	writel_relaxed(val, (char *)c->vbases[OSM_BASE] + offset);
 }
 
 static inline int clk_osm_read_reg(struct clk_osm *c, u32 offset)
 {
-	return readl_relaxed((char *)c->vbases[OSM_BASE] + offset +
-			     c->cluster_num * OSM_CORE_TABLE_SIZE);
+	return readl_relaxed((char *)c->vbases[OSM_BASE] + offset);
 }
 
 static inline int clk_osm_count_us(struct clk_osm *c, u32 usec)
@@ -784,8 +781,10 @@ static int clk_osm_resources_init(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
-	perfcl_clk.pbases[OSM_BASE] = pwrcl_clk.pbases[OSM_BASE];
-	perfcl_clk.vbases[OSM_BASE] = pwrcl_clk.vbases[OSM_BASE];
+	perfcl_clk.pbases[OSM_BASE] = pwrcl_clk.pbases[OSM_BASE] +
+		perfcl_clk.cluster_num * OSM_CORE_TABLE_SIZE;
+	perfcl_clk.vbases[OSM_BASE] = pwrcl_clk.vbases[OSM_BASE]  +
+		perfcl_clk.cluster_num * OSM_CORE_TABLE_SIZE;
 
 	for (i = 0; i < MAX_CLUSTER_CNT; i++) {
 		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
@@ -1347,8 +1346,7 @@ static void clk_osm_program_mem_acc_regs(struct clk_osm *c)
 	if (!c->secure_init)
 		return;
 
-	clk_osm_write_reg(c, c->pbases[OSM_BASE] + SEQ_REG(50) +
-			  c->cluster_num * OSM_CORE_TABLE_SIZE,
+	clk_osm_write_reg(c, c->pbases[OSM_BASE] + SEQ_REG(50),
 			  SEQ_REG(49));
 	clk_osm_write_reg(c, MEM_ACC_SEQ_CONST(1), SEQ_REG(50));
 	clk_osm_write_reg(c, MEM_ACC_SEQ_CONST(1), SEQ_REG(51));
@@ -1406,23 +1404,27 @@ static void clk_osm_setup_osm_was(struct clk_osm *c)
 {
 	u32 val;
 
-	clk_osm_write_reg(c, c->pbases[OSM_BASE] + SEQ_REG(42) +
-			  c->cluster_num *
-			  OSM_CORE_TABLE_SIZE, SEQ_REG(40));
-	clk_osm_write_reg(c, c->pbases[OSM_BASE] + SEQ_REG(43) +
-			  c->cluster_num *
-			  OSM_CORE_TABLE_SIZE, SEQ_REG(41));
-	clk_osm_write_reg(c, 0x1, SEQ_REG(44));
-	clk_osm_write_reg(c, 0x0, SEQ_REG(45));
-	clk_osm_write_reg(c, c->pbases[OSM_BASE] + PDN_FSM_CTRL_REG +
-			  c->cluster_num *
-			  OSM_CORE_TABLE_SIZE, SEQ_REG(46));
-
 	val = clk_osm_read_reg(c, PDN_FSM_CTRL_REG);
 	val |= IGNORE_PLL_LOCK_MASK;
+
+	if (c->secure_init) {
 		clk_osm_write_reg(c, val, SEQ_REG(47));
 		val &= ~IGNORE_PLL_LOCK_MASK;
 		clk_osm_write_reg(c, val, SEQ_REG(48));
+
+		clk_osm_write_reg(c, c->pbases[OSM_BASE] + SEQ_REG(42),
+				  SEQ_REG(40));
+		clk_osm_write_reg(c, c->pbases[OSM_BASE] + SEQ_REG(43),
+				  SEQ_REG(41));
+		clk_osm_write_reg(c, 0x1, SEQ_REG(44));
+		clk_osm_write_reg(c, 0x0, SEQ_REG(45));
+		clk_osm_write_reg(c, c->pbases[OSM_BASE] + PDN_FSM_CTRL_REG,
+				  SEQ_REG(46));
+	} else {
+		scm_io_write(c->pbases[OSM_BASE] + SEQ_REG(47), val);
+		val &= ~IGNORE_PLL_LOCK_MASK;
+		scm_io_write(c->pbases[OSM_BASE] + SEQ_REG(48), val);
+	}
 }
 
 static void clk_osm_setup_fsms(struct clk_osm *c)
@@ -1586,10 +1588,15 @@ static void clk_osm_apm_vc_setup(struct clk_osm *c)
 	 * APM crossover virtual corner at which the switch
 	 * from APC to MX and vice-versa should take place.
 	 */
+	if (c->secure_init) {
 		clk_osm_write_reg(c, c->apm_crossover_vc, SEQ_REG(1));
 
-	/* Ensure writes complete before delaying */
+		/* Ensure writes complete before returning */
 		mb();
+	} else {
+		scm_io_write(c->pbases[OSM_BASE] + SEQ_REG(1),
+			     c->apm_crossover_vc);
+	}
 }
 
 static irqreturn_t clk_osm_debug_irq_cb(int irq, void *data)