[PATCH v3 08/19] PCI: qcom: Use bulk clock APIs for handling clocks for IP rev 2.3.2

Manivannan Sadhasivam
2023-03-10T04:10:32Z

All the clocks are enabled and disabled at the same time. So the bulk clock
APIs can be used to handle them together. This simplifies the code a lot.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/pci/controller/dwc/pcie-qcom.c | 72 ++++++--------------------
1 file changed, 15 insertions(+), 57 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 0bb27d3c95a0..939973733a1e 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -162,12 +162,10 @@ struct qcom_pcie_resources_2_1_0 {
struct regulator_bulk_data supplies[QCOM_PCIE_2_1_0_MAX_SUPPLY];
};

-#define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
+#define QCOM_PCIE_2_3_2_MAX_CLOCKS 4
+#define QCOM_PCIE_2_3_2_MAX_SUPPLY 2
struct qcom_pcie_resources_2_3_2 {
- struct clk *aux_clk;
- struct clk *master_clk;
- struct clk *slave_clk;
- struct clk *cfg_clk;
+ struct clk_bulk_data clks[QCOM_PCIE_2_3_2_MAX_CLOCKS];
struct regulator_bulk_data supplies[QCOM_PCIE_2_3_2_MAX_SUPPLY];
};

@@ -539,21 +537,14 @@ static int qcom_pcie_get_resources_2_3_2(struct qcom_pcie *pcie)
if (ret)
return ret;

- res->aux_clk = devm_clk_get(dev, "aux");
- if (IS_ERR(res->aux_clk))
- return PTR_ERR(res->aux_clk);
-
- res->cfg_clk = devm_clk_get(dev, "cfg");
- if (IS_ERR(res->cfg_clk))
- return PTR_ERR(res->cfg_clk);
-
- res->master_clk = devm_clk_get(dev, "bus_master");
- if (IS_ERR(res->master_clk))
- return PTR_ERR(res->master_clk);
+ res->clks[0].id = "aux";
+ res->clks[1].id = "cfg";
+ res->clks[2].id = "bus_master";
+ res->clks[3].id = "bus_slave";

- res->slave_clk = devm_clk_get(dev, "bus_slave");
- if (IS_ERR(res->slave_clk))
- return PTR_ERR(res->slave_clk);
+ ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
+ if (ret < 0)
+ return ret;

return 0;
}
@@ -562,11 +553,7 @@ static void qcom_pcie_deinit_2_3_2(struct qcom_pcie *pcie)
{
struct qcom_pcie_resources_2_3_2 *res = &pcie->res.v2_3_2;

- clk_disable_unprepare(res->slave_clk);
- clk_disable_unprepare(res->master_clk);
- clk_disable_unprepare(res->cfg_clk);
- clk_disable_unprepare(res->aux_clk);
-
+ clk_bulk_disable_unprepare(ARRAY_SIZE(res->clks), res->clks);
regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
}

@@ -583,43 +570,14 @@ static int qcom_pcie_init_2_3_2(struct qcom_pcie *pcie)
return ret;
}

- ret = clk_prepare_enable(res->aux_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable aux clock\n");
- goto err_aux_clk;
- }
-
- ret = clk_prepare_enable(res->cfg_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable cfg clock\n");
- goto err_cfg_clk;
- }
-
- ret = clk_prepare_enable(res->master_clk);
- if (ret) {
- dev_err(dev, "cannot prepare/enable master clock\n");
- goto err_master_clk;
- }
-
- ret = clk_prepare_enable(res->slave_clk);
+ ret = clk_bulk_prepare_enable(ARRAY_SIZE(res->clks), res->clks);
if (ret) {
- dev_err(dev, "cannot prepare/enable slave clock\n");
- goto err_slave_clk;
+ dev_err(dev, "cannot prepare/enable clocks\n");
+ regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
+ return ret;
}

return 0;
-
-err_slave_clk:
- clk_disable_unprepare(res->master_clk);
-err_master_clk:
- clk_disable_unprepare(res->cfg_clk);
-err_cfg_clk:
- clk_disable_unprepare(res->aux_clk);
-
-err_aux_clk:
- regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
-
- return ret;
}

static int qcom_pcie_post_init_2_3_2(struct qcom_pcie *pcie)
--
2.25.1