summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/bus/omap-ocp2scp.c34
-rw-r--r--drivers/clk/ti/apll.c5
-rw-r--r--drivers/clk/ti/autoidle.c2
-rw-r--r--drivers/clk/ti/clk.c7
-rw-r--r--drivers/clk/ti/divider.c4
-rw-r--r--drivers/clk/ti/dpll.c6
-rw-r--r--drivers/clk/ti/gate.c4
-rw-r--r--drivers/clk/ti/interface.c2
-rw-r--r--drivers/clk/ti/mux.c4
9 files changed, 52 insertions, 16 deletions
diff --git a/drivers/bus/omap-ocp2scp.c b/drivers/bus/omap-ocp2scp.c
index 723ec06ad2c8..9f1856948758 100644
--- a/drivers/bus/omap-ocp2scp.c
+++ b/drivers/bus/omap-ocp2scp.c
@@ -16,6 +16,7 @@
*
*/
+#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
@@ -23,6 +24,9 @@
#include <linux/of.h>
#include <linux/of_platform.h>
+#define OCP2SCP_TIMING 0x18
+#define SYNC2_MASK 0xf
+
static int ocp2scp_remove_devices(struct device *dev, void *c)
{
struct platform_device *pdev = to_platform_device(dev);
@@ -35,6 +39,9 @@ static int ocp2scp_remove_devices(struct device *dev, void *c)
static int omap_ocp2scp_probe(struct platform_device *pdev)
{
int ret;
+ u32 reg;
+ void __iomem *regs;
+ struct resource *res;
struct device_node *np = pdev->dev.of_node;
if (np) {
@@ -47,6 +54,32 @@ static int omap_ocp2scp_probe(struct platform_device *pdev)
}
pm_runtime_enable(&pdev->dev);
+ /*
+ * As per AM572x TRM: http://www.ti.com/lit/ug/spruhz6/spruhz6.pdf
+ * under section 26.3.2.2, table 26-26 OCP2SCP TIMING Caution;
+ * As per OMAP4430 TRM: http://www.ti.com/lit/ug/swpu231ap/swpu231ap.pdf
+ * under section 23.12.6.2.2 , Table 23-1213 OCP2SCP TIMING Caution;
+ * As per OMAP4460 TRM: http://www.ti.com/lit/ug/swpu235ab/swpu235ab.pdf
+ * under section 23.12.6.2.2, Table 23-1213 OCP2SCP TIMING Caution;
+ * As per OMAP543x TRM http://www.ti.com/lit/pdf/swpu249
+ * under section 27.3.2.2, Table 27-27 OCP2SCP TIMING Caution;
+ *
+ * Read path of OCP2SCP is not working properly due to low reset value
+ * of SYNC2 parameter in OCP2SCP. Suggested reset value is 0x6 or more.
+ */
+ if (!of_device_is_compatible(np, "ti,am437x-ocp2scp")) {
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(regs))
+ goto err0;
+
+ pm_runtime_get_sync(&pdev->dev);
+ reg = readl_relaxed(regs + OCP2SCP_TIMING);
+ reg &= ~(SYNC2_MASK);
+ reg |= 0x6;
+ writel_relaxed(reg, regs + OCP2SCP_TIMING);
+ pm_runtime_put_sync(&pdev->dev);
+ }
return 0;
@@ -67,6 +100,7 @@ static int omap_ocp2scp_remove(struct platform_device *pdev)
#ifdef CONFIG_OF
static const struct of_device_id omap_ocp2scp_id_table[] = {
{ .compatible = "ti,omap-ocp2scp" },
+ { .compatible = "ti,am437x-ocp2scp" },
{}
};
MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
diff --git a/drivers/clk/ti/apll.c b/drivers/clk/ti/apll.c
index 72d97279eae1..49baf3831546 100644
--- a/drivers/clk/ti/apll.c
+++ b/drivers/clk/ti/apll.c
@@ -203,7 +203,7 @@ static void __init of_dra7_apll_setup(struct device_node *node)
ad->control_reg = ti_clk_get_reg_addr(node, 0);
ad->idlest_reg = ti_clk_get_reg_addr(node, 1);
- if (!ad->control_reg || !ad->idlest_reg)
+ if (IS_ERR(ad->control_reg) || IS_ERR(ad->idlest_reg))
goto cleanup;
ad->idlest_mask = 0x1;
@@ -384,7 +384,8 @@ static void __init of_omap2_apll_setup(struct device_node *node)
ad->autoidle_reg = ti_clk_get_reg_addr(node, 1);
ad->idlest_reg = ti_clk_get_reg_addr(node, 2);
- if (!ad->control_reg || !ad->autoidle_reg || !ad->idlest_reg)
+ if (IS_ERR(ad->control_reg) || IS_ERR(ad->autoidle_reg) ||
+ IS_ERR(ad->idlest_reg))
goto cleanup;
clk = clk_register(NULL, &clk_hw->hw);
diff --git a/drivers/clk/ti/autoidle.c b/drivers/clk/ti/autoidle.c
index 8912ff80af34..e75c64c9e81c 100644
--- a/drivers/clk/ti/autoidle.c
+++ b/drivers/clk/ti/autoidle.c
@@ -119,7 +119,7 @@ int __init of_ti_clk_autoidle_setup(struct device_node *node)
clk->name = node->name;
clk->reg = ti_clk_get_reg_addr(node, 0);
- if (!clk->reg) {
+ if (IS_ERR(clk->reg)) {
kfree(clk);
return -EINVAL;
}
diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
index e22b95646e09..0ebe5c51062b 100644
--- a/drivers/clk/ti/clk.c
+++ b/drivers/clk/ti/clk.c
@@ -103,7 +103,8 @@ int __init ti_clk_retry_init(struct device_node *node, struct clk_hw *hw,
* @index: register index from the clock node
*
* Builds clock register address from device tree information. This
- * is a struct of type clk_omap_reg.
+ * is a struct of type clk_omap_reg. Returns a pointer to the register
+ * address, or a pointer error value in failure.
*/
void __iomem *ti_clk_get_reg_addr(struct device_node *node, int index)
{
@@ -121,14 +122,14 @@ void __iomem *ti_clk_get_reg_addr(struct device_node *node, int index)
if (i == CLK_MAX_MEMMAPS) {
pr_err("clk-provider not found for %s!\n", node->name);
- return NULL;
+ return ERR_PTR(-ENOENT);
}
reg->index = i;
if (of_property_read_u32_index(node, "reg", index, &val)) {
pr_err("%s must have reg[%d]!\n", node->name, index);
- return NULL;
+ return ERR_PTR(-EINVAL);
}
reg->offset = val;
diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index 6211893c0980..ff5f117950a9 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -530,8 +530,8 @@ static int __init ti_clk_divider_populate(struct device_node *node,
u32 val;
*reg = ti_clk_get_reg_addr(node, 0);
- if (!*reg)
- return -EINVAL;
+ if (IS_ERR(*reg))
+ return PTR_ERR(*reg);
if (!of_property_read_u32(node, "ti,bit-shift", &val))
*shift = val;
diff --git a/drivers/clk/ti/dpll.c b/drivers/clk/ti/dpll.c
index 81dc4698dc41..11478a501c30 100644
--- a/drivers/clk/ti/dpll.c
+++ b/drivers/clk/ti/dpll.c
@@ -390,18 +390,18 @@ static void __init of_ti_dpll_setup(struct device_node *node,
#endif
} else {
dd->idlest_reg = ti_clk_get_reg_addr(node, 1);
- if (!dd->idlest_reg)
+ if (IS_ERR(dd->idlest_reg))
goto cleanup;
dd->mult_div1_reg = ti_clk_get_reg_addr(node, 2);
}
- if (!dd->control_reg || !dd->mult_div1_reg)
+ if (IS_ERR(dd->control_reg) || IS_ERR(dd->mult_div1_reg))
goto cleanup;
if (dd->autoidle_mask) {
dd->autoidle_reg = ti_clk_get_reg_addr(node, 3);
- if (!dd->autoidle_reg)
+ if (IS_ERR(dd->autoidle_reg))
goto cleanup;
}
diff --git a/drivers/clk/ti/gate.c b/drivers/clk/ti/gate.c
index d493307b73f4..0c6fdfcd5f93 100644
--- a/drivers/clk/ti/gate.c
+++ b/drivers/clk/ti/gate.c
@@ -225,7 +225,7 @@ static void __init _of_ti_gate_clk_setup(struct device_node *node,
if (ops != &omap_gate_clkdm_clk_ops) {
reg = ti_clk_get_reg_addr(node, 0);
- if (!reg)
+ if (IS_ERR(reg))
return;
if (!of_property_read_u32(node, "ti,bit-shift", &val))
@@ -264,7 +264,7 @@ _of_ti_composite_gate_clk_setup(struct device_node *node,
return;
gate->enable_reg = ti_clk_get_reg_addr(node, 0);
- if (!gate->enable_reg)
+ if (IS_ERR(gate->enable_reg))
goto cleanup;
of_property_read_u32(node, "ti,bit-shift", &val);
diff --git a/drivers/clk/ti/interface.c b/drivers/clk/ti/interface.c
index 265d91f071c5..c76230d8dd04 100644
--- a/drivers/clk/ti/interface.c
+++ b/drivers/clk/ti/interface.c
@@ -111,7 +111,7 @@ static void __init _of_ti_interface_clk_setup(struct device_node *node,
u32 val;
reg = ti_clk_get_reg_addr(node, 0);
- if (!reg)
+ if (IS_ERR(reg))
return;
if (!of_property_read_u32(node, "ti,bit-shift", &val))
diff --git a/drivers/clk/ti/mux.c b/drivers/clk/ti/mux.c
index 728e253606bc..5cdeed538b08 100644
--- a/drivers/clk/ti/mux.c
+++ b/drivers/clk/ti/mux.c
@@ -210,7 +210,7 @@ static void of_mux_clk_setup(struct device_node *node)
reg = ti_clk_get_reg_addr(node, 0);
- if (!reg)
+ if (IS_ERR(reg))
goto cleanup;
of_property_read_u32(node, "ti,bit-shift", &shift);
@@ -283,7 +283,7 @@ static void __init of_ti_composite_mux_clk_setup(struct device_node *node)
mux->reg = ti_clk_get_reg_addr(node, 0);
- if (!mux->reg)
+ if (IS_ERR(mux->reg))
goto cleanup;
if (!of_property_read_u32(node, "ti,bit-shift", &val))
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-11 00:43:28 +0300