+// 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
- *
- * SPDX-License-Identifier: BSD-3-Clause
*/
#include <common.h>
-#include <clk.h>
+#include <clk-uclass.h>
#include <dm.h>
#include <errno.h>
#include <asm/io.h>
#include <linux/bitops.h>
+#include "clock-snapdragon.h"
/* GPLL0 clock control registers */
-#define GPLL0_STATUS 0x2101C
#define GPLL0_STATUS_ACTIVE BIT(17)
-#define APCS_GPLL_ENA_VOTE 0x45000
-#define APCS_GPLL_ENA_VOTE_GPLL0 BIT(0)
-
-/* vote reg for blsp1 clock */
-#define APCS_CLOCK_BRANCH_ENA_VOTE 0x45004
-#define APCS_CLOCK_BRANCH_ENA_VOTE_BLSP1 BIT(10)
-
-/* SDC(n) clock control registers; n=1,2 */
-
-/* block control register */
-#define SDCC_BCR(n) ((n * 0x1000) + 0x41000)
-/* cmd */
-#define SDCC_CMD_RCGR(n) ((n * 0x1000) + 0x41004)
-/* cfg */
-#define SDCC_CFG_RCGR(n) ((n * 0x1000) + 0x41008)
-/* m */
-#define SDCC_M(n) ((n * 0x1000) + 0x4100C)
-/* n */
-#define SDCC_N(n) ((n * 0x1000) + 0x41010)
-/* d */
-#define SDCC_D(n) ((n * 0x1000) + 0x41014)
-/* branch control */
-#define SDCC_APPS_CBCR(n) ((n * 0x1000) + 0x41018)
-#define SDCC_AHB_CBCR(n) ((n * 0x1000) + 0x4101C)
-
-/* BLSP1 AHB clock (root clock for BLSP) */
-#define BLSP1_AHB_CBCR 0x1008
-
-/* Uart clock control registers */
-#define BLSP1_UART2_BCR 0x3028
-#define BLSP1_UART2_APPS_CBCR 0x302C
-#define BLSP1_UART2_APPS_CMD_RCGR 0x3034
-#define BLSP1_UART2_APPS_CFG_RCGR 0x3038
-#define BLSP1_UART2_APPS_M 0x303C
-#define BLSP1_UART2_APPS_N 0x3040
-#define BLSP1_UART2_APPS_D 0x3044
-
-/* CBCR register fields */
-#define CBCR_BRANCH_ENABLE_BIT BIT(0)
-#define CBCR_BRANCH_OFF_BIT BIT(31)
-
-struct msm_clk_priv {
- phys_addr_t base;
-};
-
-/* Enable clock controlled by CBC soft macro */
-static void clk_enable_cbc(phys_addr_t cbcr)
-{
- setbits_le32(cbcr, CBCR_BRANCH_ENABLE_BIT);
-
- while (readl(cbcr) & CBCR_BRANCH_OFF_BIT)
- ;
-}
-
-/* clock has 800MHz */
-static void clk_enable_gpll0(phys_addr_t base)
-{
- if (readl(base + GPLL0_STATUS) & GPLL0_STATUS_ACTIVE)
- return; /* clock already enabled */
-
- setbits_le32(base + APCS_GPLL_ENA_VOTE, APCS_GPLL_ENA_VOTE_GPLL0);
-
- while ((readl(base + GPLL0_STATUS) & GPLL0_STATUS_ACTIVE) == 0)
- ;
-}
-
-#define APPS_CMD_RGCR_UPDATE BIT(0)
-
-/* Update clock command via CMD_RGCR */
-static void clk_bcr_update(phys_addr_t apps_cmd_rgcr)
-{
- setbits_le32(apps_cmd_rgcr, APPS_CMD_RGCR_UPDATE);
-
- /* Wait for frequency to be updated. */
- while (readl(apps_cmd_rgcr) & APPS_CMD_RGCR_UPDATE)
- ;
-}
-
-struct bcr_regs {
- uintptr_t cfg_rcgr;
- uintptr_t cmd_rcgr;
- uintptr_t M;
- uintptr_t N;
- uintptr_t D;
-};
-
-/* RCGR_CFG register fields */
-#define CFG_MODE_DUAL_EDGE (0x2 << 12) /* Counter mode */
-
-/* sources */
-#define CFG_CLK_SRC_CXO (0 << 8)
-#define CFG_CLK_SRC_GPLL0 (1 << 8)
-#define CFG_CLK_SRC_MASK (7 << 8)
-
-/* Mask for supported fields */
-#define CFG_MASK 0x3FFF
-
-#define CFG_DIVIDER_MASK 0x1F
-
-/* root set rate for clocks with half integer and MND divider */
-static void clk_rcg_set_rate_mnd(phys_addr_t base, const struct bcr_regs *regs,
- int div, int m, int n, int source)
-{
- uint32_t cfg;
- /* M value for MND divider. */
- uint32_t m_val = m;
- /* NOT(N-M) value for MND divider. */
- uint32_t n_val = ~((n)-(m)) * !!(n);
- /* NOT 2D value for MND divider. */
- uint32_t d_val = ~(n);
-
- /* Program MND values */
- writel(m_val, base + regs->M);
- writel(n_val, base + regs->N);
- writel(d_val, base + regs->D);
-
- /* setup src select and divider */
- cfg = readl(base + regs->cfg_rcgr);
- cfg &= ~CFG_MASK;
- cfg |= source & CFG_CLK_SRC_MASK; /* Select clock source */
-
- /* Set the divider; HW permits fraction dividers (+0.5), but
- for simplicity, we will support integers only */
- if (div)
- cfg |= (2 * div - 1) & CFG_DIVIDER_MASK;
-
- if (n_val)
- cfg |= CFG_MODE_DUAL_EDGE;
-
- writel(cfg, base + regs->cfg_rcgr); /* Write new clock configuration */
-
- /* Inform h/w to start using the new config. */
- clk_bcr_update(base + regs->cmd_rcgr);
-}
-
static const struct bcr_regs sdc_regs[] = {
{
.cfg_rcgr = SDCC_CFG_RCGR(1),
}
};
-/* Init clock for SDHCI controller */
+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 */
/* 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);
+ clk_enable_gpll0(priv->base, &gpll0_vote_clk);
clk_enable_cbc(priv->base + SDCC_APPS_CBCR(slot));
return rate;
.D = BLSP1_UART2_APPS_D,
};
-/* Init UART clock, 115200 */
+/* UART: 115200 */
static int clk_init_uart(struct msm_clk_priv *priv)
{
- /* Enable iface clk */
- clk_enable_cbc(priv->base + BLSP1_AHB_CBCR);
+ /* 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);
- clk_enable_gpll0(priv->base);
+
+ /* 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_periph_rate(struct udevice *dev, int periph, ulong rate)
+ulong msm_set_rate(struct clk *clk, ulong rate)
{
- struct msm_clk_priv *priv = dev_get_priv(dev);
+ struct msm_clk_priv *priv = dev_get_priv(clk->dev);
- switch (periph) {
+ switch (clk->id) {
case 0: /* SDC1 */
return clk_init_sdc(priv, 0, rate);
break;
return 0;
}
}
-
-static int msm_clk_probe(struct udevice *dev)
-{
- struct msm_clk_priv *priv = dev_get_priv(dev);
-
- priv->base = dev_get_addr(dev);
- if (priv->base == FDT_ADDR_T_NONE)
- return -EINVAL;
-
- return 0;
-}
-
-static struct clk_ops msm_clk_ops = {
- .set_periph_rate = msm_set_periph_rate,
-};
-
-static const struct udevice_id msm_clk_ids[] = {
- { .compatible = "qcom,gcc-msm8916" },
- { .compatible = "qcom,gcc-apq8016" },
- { }
-};
-
-U_BOOT_DRIVER(clk_msm) = {
- .name = "clk_msm",
- .id = UCLASS_CLK,
- .of_match = msm_clk_ids,
- .ops = &msm_clk_ops,
- .priv_auto_alloc_size = sizeof(struct msm_clk_priv),
- .probe = msm_clk_probe,
-};
projects / oweals / u-boot.git / blobdiff