[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/clk/clk-twl6040.c b/src/kernel/linux/v4.14/drivers/clk/clk-twl6040.c
new file mode 100644
index 0000000..82d615f
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/clk/clk-twl6040.c
@@ -0,0 +1,177 @@
+/*
+* TWL6040 clock module driver for OMAP4 McPDM functional clock
+*
+* Copyright (C) 2012 Texas Instruments Inc.
+* Peter Ujfalusi <peter.ujfalusi@ti.com>
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License
+* version 2 as published by the Free Software Foundation.
+*
+* This program is distributed in the hope that it will be useful, but
+* WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+* 02110-1301 USA
+*
+*/
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/twl6040.h>
+#include <linux/clk-provider.h>
+
+struct twl6040_pdmclk {
+ struct twl6040 *twl6040;
+ struct device *dev;
+ struct clk_hw pdmclk_hw;
+ int enabled;
+};
+
+static int twl6040_pdmclk_is_prepared(struct clk_hw *hw)
+{
+ struct twl6040_pdmclk *pdmclk = container_of(hw, struct twl6040_pdmclk,
+ pdmclk_hw);
+
+ return pdmclk->enabled;
+}
+
+static int twl6040_pdmclk_reset_one_clock(struct twl6040_pdmclk *pdmclk,
+ unsigned int reg)
+{
+ const u8 reset_mask = TWL6040_HPLLRST; /* Same for HPPLL and LPPLL */
+ int ret;
+
+ ret = twl6040_set_bits(pdmclk->twl6040, reg, reset_mask);
+ if (ret < 0)
+ return ret;
+
+ ret = twl6040_clear_bits(pdmclk->twl6040, reg, reset_mask);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/*
+ * TWL6040A2 Phoenix Audio IC erratum #6: "PDM Clock Generation Issue At
+ * Cold Temperature". This affects cold boot and deeper idle states it
+ * seems. The workaround consists of resetting HPPLL and LPPLL.
+ */
+static int twl6040_pdmclk_quirk_reset_clocks(struct twl6040_pdmclk *pdmclk)
+{
+ int ret;
+
+ ret = twl6040_pdmclk_reset_one_clock(pdmclk, TWL6040_REG_HPPLLCTL);
+ if (ret)
+ return ret;
+
+ ret = twl6040_pdmclk_reset_one_clock(pdmclk, TWL6040_REG_LPPLLCTL);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int twl6040_pdmclk_prepare(struct clk_hw *hw)
+{
+ struct twl6040_pdmclk *pdmclk = container_of(hw, struct twl6040_pdmclk,
+ pdmclk_hw);
+ int ret;
+
+ ret = twl6040_power(pdmclk->twl6040, 1);
+ if (ret)
+ return ret;
+
+ ret = twl6040_pdmclk_quirk_reset_clocks(pdmclk);
+ if (ret)
+ goto out_err;
+
+ pdmclk->enabled = 1;
+
+ return 0;
+
+out_err:
+ dev_err(pdmclk->dev, "%s: error %i\n", __func__, ret);
+ twl6040_power(pdmclk->twl6040, 0);
+
+ return ret;
+}
+
+static void twl6040_pdmclk_unprepare(struct clk_hw *hw)
+{
+ struct twl6040_pdmclk *pdmclk = container_of(hw, struct twl6040_pdmclk,
+ pdmclk_hw);
+ int ret;
+
+ ret = twl6040_power(pdmclk->twl6040, 0);
+ if (!ret)
+ pdmclk->enabled = 0;
+
+}
+
+static unsigned long twl6040_pdmclk_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct twl6040_pdmclk *pdmclk = container_of(hw, struct twl6040_pdmclk,
+ pdmclk_hw);
+
+ return twl6040_get_sysclk(pdmclk->twl6040);
+}
+
+static const struct clk_ops twl6040_pdmclk_ops = {
+ .is_prepared = twl6040_pdmclk_is_prepared,
+ .prepare = twl6040_pdmclk_prepare,
+ .unprepare = twl6040_pdmclk_unprepare,
+ .recalc_rate = twl6040_pdmclk_recalc_rate,
+};
+
+static struct clk_init_data twl6040_pdmclk_init = {
+ .name = "pdmclk",
+ .ops = &twl6040_pdmclk_ops,
+ .flags = CLK_GET_RATE_NOCACHE,
+};
+
+static int twl6040_pdmclk_probe(struct platform_device *pdev)
+{
+ struct twl6040 *twl6040 = dev_get_drvdata(pdev->dev.parent);
+ struct twl6040_pdmclk *clkdata;
+ int ret;
+
+ clkdata = devm_kzalloc(&pdev->dev, sizeof(*clkdata), GFP_KERNEL);
+ if (!clkdata)
+ return -ENOMEM;
+
+ clkdata->dev = &pdev->dev;
+ clkdata->twl6040 = twl6040;
+
+ clkdata->pdmclk_hw.init = &twl6040_pdmclk_init;
+ ret = devm_clk_hw_register(&pdev->dev, &clkdata->pdmclk_hw);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, clkdata);
+
+ return of_clk_add_hw_provider(pdev->dev.parent->of_node,
+ of_clk_hw_simple_get,
+ &clkdata->pdmclk_hw);
+}
+
+static struct platform_driver twl6040_pdmclk_driver = {
+ .driver = {
+ .name = "twl6040-pdmclk",
+ },
+ .probe = twl6040_pdmclk_probe,
+};
+
+module_platform_driver(twl6040_pdmclk_driver);
+
+MODULE_DESCRIPTION("TWL6040 clock driver for McPDM functional clock");
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
+MODULE_ALIAS("platform:twl6040-pdmclk");
+MODULE_LICENSE("GPL");