clk/qcom: move from mach-snapdragon
Clock drivers don't belong here, move them to the right place and
declutter mach-snapdragon a bit.
To de-couple these drivers from specific "target" platforms, add
additional config options to enable each clock driver gated behind a
common CLK_QCOM option and enable them by default for the respective
targets. This will make future work easier as we move towards a generic
Qualcomm target.
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/drivers/clk/qcom/clock-apq8016.c b/drivers/clk/qcom/clock-apq8016.c
new file mode 100644
index 0000000..90f2a93
--- /dev/null
+++ b/drivers/clk/qcom/clock-apq8016.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Clock drivers for Qualcomm APQ8016
+ *
+ * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
+ *
+ * Based on Little Kernel driver, simplified
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <linux/bitops.h>
+#include "clock-qcom.h"
+
+/* GPLL0 clock control registers */
+#define GPLL0_STATUS_ACTIVE BIT(17)
+
+static const struct bcr_regs sdc_regs[] = {
+ {
+ .cfg_rcgr = SDCC_CFG_RCGR(1),
+ .cmd_rcgr = SDCC_CMD_RCGR(1),
+ .M = SDCC_M(1),
+ .N = SDCC_N(1),
+ .D = SDCC_D(1),
+ },
+ {
+ .cfg_rcgr = SDCC_CFG_RCGR(2),
+ .cmd_rcgr = SDCC_CMD_RCGR(2),
+ .M = SDCC_M(2),
+ .N = SDCC_N(2),
+ .D = SDCC_D(2),
+ }
+};
+
+static struct pll_vote_clk gpll0_vote_clk = {
+ .status = GPLL0_STATUS,
+ .status_bit = GPLL0_STATUS_ACTIVE,
+ .ena_vote = APCS_GPLL_ENA_VOTE,
+ .vote_bit = BIT(0),
+};
+
+static struct vote_clk gcc_blsp1_ahb_clk = {
+ .cbcr_reg = BLSP1_AHB_CBCR,
+ .ena_vote = APCS_CLOCK_BRANCH_ENA_VOTE,
+ .vote_bit = BIT(10),
+};
+
+/* SDHCI */
+static int clk_init_sdc(struct msm_clk_priv *priv, int slot, uint rate)
+{
+ int div = 8; /* 100MHz default */
+
+ if (rate == 200000000)
+ div = 4;
+
+ clk_enable_cbc(priv->base + SDCC_AHB_CBCR(slot));
+ /* 800Mhz/div, gpll0 */
+ clk_rcg_set_rate_mnd(priv->base, &sdc_regs[slot], div, 0, 0,
+ CFG_CLK_SRC_GPLL0);
+ clk_enable_gpll0(priv->base, &gpll0_vote_clk);
+ clk_enable_cbc(priv->base + SDCC_APPS_CBCR(slot));
+
+ return rate;
+}
+
+static const struct bcr_regs uart2_regs = {
+ .cfg_rcgr = BLSP1_UART2_APPS_CFG_RCGR,
+ .cmd_rcgr = BLSP1_UART2_APPS_CMD_RCGR,
+ .M = BLSP1_UART2_APPS_M,
+ .N = BLSP1_UART2_APPS_N,
+ .D = BLSP1_UART2_APPS_D,
+};
+
+/* UART: 115200 */
+static int clk_init_uart(struct msm_clk_priv *priv)
+{
+ /* Enable AHB clock */
+ clk_enable_vote_clk(priv->base, &gcc_blsp1_ahb_clk);
+
+ /* 7372800 uart block clock @ GPLL0 */
+ clk_rcg_set_rate_mnd(priv->base, &uart2_regs, 1, 144, 15625,
+ CFG_CLK_SRC_GPLL0);
+
+ /* Vote for gpll0 clock */
+ clk_enable_gpll0(priv->base, &gpll0_vote_clk);
+
+ /* Enable core clk */
+ clk_enable_cbc(priv->base + BLSP1_UART2_APPS_CBCR);
+
+ return 0;
+}
+
+ulong msm_set_rate(struct clk *clk, ulong rate)
+{
+ struct msm_clk_priv *priv = dev_get_priv(clk->dev);
+
+ switch (clk->id) {
+ case 0: /* SDC1 */
+ return clk_init_sdc(priv, 0, rate);
+ break;
+ case 1: /* SDC2 */
+ return clk_init_sdc(priv, 1, rate);
+ break;
+ case 4: /* UART2 */
+ return clk_init_uart(priv);
+ break;
+ default:
+ return 0;
+ }
+}
+
+int msm_enable(struct clk *clk)
+{
+ return 0;
+}