u32 em_msg_type; /* EM message type */
bool got_runtime_pm; /* Did we do pm_runtime_get? */
struct clk *clks[AHCI_MAX_CLKS]; /* Optional */
+ struct reset_control *rsts; /* Optional */
struct regulator **target_pwrs; /* Optional */
/*
* If platform uses PHYs. There is a 1:1 relation between the port number and
#include <linux/phy/phy.h>
#include <linux/pm_runtime.h>
#include <linux/of_platform.h>
+#include <linux/reset.h>
#include "ahci.h"
static void ahci_host_stop(struct ata_host *host);
* following order:
* 1) Regulator
* 2) Clocks (through ahci_platform_enable_clks)
- * 3) Phys
+ * 3) Resets
+ * 4) Phys
*
* If resource enabling fails at any point the previous enabled resources
* are disabled in reverse order.
if (rc)
goto disable_regulator;
- rc = ahci_platform_enable_phys(hpriv);
+ rc = reset_control_deassert(hpriv->rsts);
if (rc)
goto disable_clks;
+ rc = ahci_platform_enable_phys(hpriv);
+ if (rc)
+ goto disable_resets;
+
return 0;
+disable_resets:
+ reset_control_assert(hpriv->rsts);
+
disable_clks:
ahci_platform_disable_clks(hpriv);
* This function disables all ahci_platform managed resources in the
* following order:
* 1) Phys
- * 2) Clocks (through ahci_platform_disable_clks)
- * 3) Regulator
+ * 2) Resets
+ * 3) Clocks (through ahci_platform_disable_clks)
+ * 4) Regulator
*/
void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
{
ahci_platform_disable_phys(hpriv);
+ reset_control_assert(hpriv->rsts);
+
ahci_platform_disable_clks(hpriv);
ahci_platform_disable_regulators(hpriv);
* 2) regulator for controlling the targets power (optional)
* 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
* or for non devicetree enabled platforms a single clock
- * 4) phys (optional)
+ * 4) resets, if flags has AHCI_PLATFORM_GET_RESETS (optional)
+ * 5) phys (optional)
*
* RETURNS:
* The allocated ahci_host_priv on success, otherwise an ERR_PTR value
hpriv->clks[i] = clk;
}
+ if (flags & AHCI_PLATFORM_GET_RESETS) {
+ hpriv->rsts = devm_reset_control_array_get_optional_shared(dev);
+ if (IS_ERR(hpriv->rsts)) {
+ rc = PTR_ERR(hpriv->rsts);
+ goto err_out;
+ }
+ }
+
hpriv->nports = child_nodes = of_get_child_count(dev->of_node);
/*