summaryrefslogtreecommitdiffstats
path: root/drivers/ata
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/ahci.h4
-rw-r--r--drivers/ata/ahci_da850.c47
-rw-r--r--drivers/ata/ahci_dm816.c4
-rw-r--r--drivers/ata/libahci_platform.c83
4 files changed, 61 insertions, 77 deletions
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index ad11a4c52fbe..c3770a19781b 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -38,7 +38,6 @@
enum {
AHCI_MAX_PORTS = 32,
- AHCI_MAX_CLKS = 5,
AHCI_MAX_SG = 168, /* hardware max is 64K */
AHCI_DMA_BOUNDARY = 0xffffffff,
AHCI_MAX_CMDS = 32,
@@ -339,7 +338,8 @@ struct ahci_host_priv {
u32 em_msg_type; /* EM message type */
u32 remapped_nvme; /* NVMe remapped device count */
bool got_runtime_pm; /* Did we do pm_runtime_get? */
- struct clk *clks[AHCI_MAX_CLKS]; /* Optional */
+ unsigned int n_clks;
+ struct clk_bulk_data *clks; /* Optional */
struct reset_control *rsts; /* Optional */
struct regulator **target_pwrs; /* Optional */
struct regulator *ahci_regulator;/* Optional */
diff --git a/drivers/ata/ahci_da850.c b/drivers/ata/ahci_da850.c
index 052c28e250aa..dc8a019b8340 100644
--- a/drivers/ata/ahci_da850.c
+++ b/drivers/ata/ahci_da850.c
@@ -163,7 +163,6 @@ static int ahci_da850_probe(struct platform_device *pdev)
struct ahci_host_priv *hpriv;
void __iomem *pwrdn_reg;
struct resource *res;
- struct clk *clk;
u32 mpy;
int rc;
@@ -172,36 +171,28 @@ static int ahci_da850_probe(struct platform_device *pdev)
return PTR_ERR(hpriv);
/*
- * Internally ahci_platform_get_resources() calls clk_get(dev, NULL)
- * when trying to obtain the functional clock. This SATA controller
- * uses two clocks for which we specify two connection ids. If we don't
- * have the functional clock at this point - call clk_get() again with
- * con_id = "fck".
+ * Internally ahci_platform_get_resources() calls the bulk clocks
+ * get method or falls back to using a single clk_get_optional().
+ * This AHCI SATA controller uses two clocks: functional clock
+ * with "fck" connection id and external reference clock with
+ * "refclk" id. If we haven't got all of them re-try the clocks
+ * getting procedure with the explicitly specified ids.
*/
- if (!hpriv->clks[0]) {
- clk = clk_get(dev, "fck");
- if (IS_ERR(clk))
- return PTR_ERR(clk);
-
- hpriv->clks[0] = clk;
- }
-
- /*
- * The second clock used by ahci-da850 is the external REFCLK. If we
- * didn't get it from ahci_platform_get_resources(), let's try to
- * specify the con_id in clk_get().
- */
- if (!hpriv->clks[1]) {
- clk = clk_get(dev, "refclk");
- if (IS_ERR(clk)) {
- dev_err(dev, "unable to obtain the reference clock");
- return -ENODEV;
- }
-
- hpriv->clks[1] = clk;
+ if (hpriv->n_clks < 2) {
+ hpriv->clks = devm_kcalloc(dev, 2, sizeof(*hpriv->clks), GFP_KERNEL);
+ if (!hpriv->clks)
+ return -ENOMEM;
+
+ hpriv->clks[0].id = "fck";
+ hpriv->clks[1].id = "refclk";
+ hpriv->n_clks = 2;
+
+ rc = devm_clk_bulk_get(dev, hpriv->n_clks, hpriv->clks);
+ if (rc)
+ return rc;
}
- mpy = ahci_da850_calculate_mpy(clk_get_rate(hpriv->clks[1]));
+ mpy = ahci_da850_calculate_mpy(clk_get_rate(hpriv->clks[1].clk));
if (mpy == 0) {
dev_err(dev, "invalid REFCLK multiplier value: 0x%x", mpy);
return -EINVAL;
diff --git a/drivers/ata/ahci_dm816.c b/drivers/ata/ahci_dm816.c
index 8a92112dcd59..d26efcd20f64 100644
--- a/drivers/ata/ahci_dm816.c
+++ b/drivers/ata/ahci_dm816.c
@@ -69,12 +69,12 @@ static int ahci_dm816_phy_init(struct ahci_host_priv *hpriv, struct device *dev)
* keep-alive clock and the external reference clock. We need the
* rate of the latter to calculate the correct value of MPY bits.
*/
- if (!hpriv->clks[1]) {
+ if (hpriv->n_clks < 2) {
dev_err(dev, "reference clock not supplied\n");
return -EINVAL;
}
- refclk_rate = clk_get_rate(hpriv->clks[1]);
+ refclk_rate = clk_get_rate(hpriv->clks[1].clk);
if ((refclk_rate % 100) != 0) {
dev_err(dev, "reference clock rate must be divisible by 100\n");
return -EINVAL;
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 1e9e825d6cc5..7366eb0adf41 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -97,28 +97,14 @@ EXPORT_SYMBOL_GPL(ahci_platform_disable_phys);
* ahci_platform_enable_clks - Enable platform clocks
* @hpriv: host private area to store config values
*
- * This function enables all the clks found in hpriv->clks, starting at
- * index 0. If any clk fails to enable it disables all the clks already
- * enabled in reverse order, and then returns an error.
+ * This function enables all the clks found for the AHCI device.
*
* RETURNS:
* 0 on success otherwise a negative error code
*/
int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
{
- int c, rc;
-
- for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
- rc = clk_prepare_enable(hpriv->clks[c]);
- if (rc)
- goto disable_unprepare_clk;
- }
- return 0;
-
-disable_unprepare_clk:
- while (--c >= 0)
- clk_disable_unprepare(hpriv->clks[c]);
- return rc;
+ return clk_bulk_prepare_enable(hpriv->n_clks, hpriv->clks);
}
EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
@@ -126,16 +112,13 @@ EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
* ahci_platform_disable_clks - Disable platform clocks
* @hpriv: host private area to store config values
*
- * This function disables all the clks found in hpriv->clks, in reverse
- * order of ahci_platform_enable_clks (starting at the end of the array).
+ * This function disables all the clocks enabled before
+ * (bulk-clocks-disable function is supposed to do that in reverse
+ * from the enabling procedure order).
*/
void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
{
- int c;
-
- for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
- if (hpriv->clks[c])
- clk_disable_unprepare(hpriv->clks[c]);
+ clk_bulk_disable_unprepare(hpriv->n_clks, hpriv->clks);
}
EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
@@ -292,8 +275,6 @@ static void ahci_platform_put_resources(struct device *dev, void *res)
pm_runtime_disable(dev);
}
- for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
- clk_put(hpriv->clks[c]);
/*
* The regulators are tied to child node device and not to the
* SATA device itself. So we can't use devm for automatically
@@ -374,8 +355,8 @@ static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port,
* 1) mmio registers (IORESOURCE_MEM 0, mandatory)
* 2) regulator for controlling the targets power (optional)
* regulator for controlling the AHCI controller (optional)
- * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
- * or for non devicetree enabled platforms a single clock
+ * 3) all clocks specified in the devicetree node, or a single
+ * clock for non-OF platforms (optional)
* 4) resets, if flags has AHCI_PLATFORM_GET_RESETS (optional)
* 5) phys (optional)
*
@@ -385,11 +366,10 @@ static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port,
struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
unsigned int flags)
{
+ int child_nodes, rc = -ENOMEM, enabled_ports = 0;
struct device *dev = &pdev->dev;
struct ahci_host_priv *hpriv;
- struct clk *clk;
struct device_node *child;
- int i, enabled_ports = 0, rc = -ENOMEM, child_nodes;
u32 mask_port_map = 0;
if (!devres_open_group(dev, NULL, GFP_KERNEL))
@@ -415,25 +395,38 @@ struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
goto err_out;
}
- for (i = 0; i < AHCI_MAX_CLKS; i++) {
+ /*
+ * Bulk clocks getting procedure can fail to find any clock due to
+ * running on a non-OF platform or due to the clocks being defined in
+ * bypass of the DT firmware (like da850, spear13xx). In that case we
+ * fallback to getting a single clock source right from the dev clocks
+ * list.
+ */
+ rc = devm_clk_bulk_get_all(dev, &hpriv->clks);
+ if (rc < 0)
+ goto err_out;
+
+ if (rc > 0) {
+ /* Got clocks in bulk */
+ hpriv->n_clks = rc;
+ } else {
/*
- * For now we must use clk_get(dev, NULL) for the first clock,
- * because some platforms (da850, spear13xx) are not yet
- * converted to use devicetree for clocks. For new platforms
- * this is equivalent to of_clk_get(dev->of_node, 0).
+ * No clock bulk found: fallback to manually getting
+ * the optional clock.
*/
- if (i == 0)
- clk = clk_get(dev, NULL);
- else
- clk = of_clk_get(dev->of_node, i);
-
- if (IS_ERR(clk)) {
- rc = PTR_ERR(clk);
- if (rc == -EPROBE_DEFER)
- goto err_out;
- break;
+ hpriv->clks = devm_kzalloc(dev, sizeof(*hpriv->clks), GFP_KERNEL);
+ if (!hpriv->clks) {
+ rc = -ENOMEM;
+ goto err_out;
+ }
+ hpriv->clks->clk = devm_clk_get_optional(dev, NULL);
+ if (IS_ERR(hpriv->clks->clk)) {
+ rc = PTR_ERR(hpriv->clks->clk);
+ goto err_out;
+ } else if (hpriv->clks->clk) {
+ hpriv->clks->id = "ahci";
+ hpriv->n_clks = 1;
}
- hpriv->clks[i] = clk;
}
hpriv->ahci_regulator = devm_regulator_get(dev, "ahci");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 13:15:35 +0000