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Commit 5759d6cd authored by Stephen Boyd's avatar Stephen Boyd
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Merge tag 'bcm2835-clk-next-2016-03-17' of git://github.com/anholt/linux into clk-next 

This pull request against clk/clk-next brings in fixes for fractional
clocks on 2835, add the PCM clock that used to be driven directly by
the bcm2835-i2s driver (that driver has been broken since this driver
was introduced), and adds many other new clocks.

* tag 'bcm2835-clk-next-2016-03-17' of git://github.com/anholt/linux:
  clk: bcm2835: add missing osc and per clocks
  clk: bcm2835: add missing PLL clock dividers
  clk: bcm2835: enable management of PCM clock
  clk: bcm2835: reorganize bcm2835_clock_array assignment
  clk: bcm2835: remove use of BCM2835_CLOCK_COUNT in driver
  clk: bcm2835: expose raw clock-registers via debugfs
  clk: bcm2835: clean up coding style issues
  clk: bcm2835: correctly enable fractional clock support
  clk: bcm2835: divider value has to be 1 or more
  clk: bcm2835: add locking to pll*_on/off methods
  clk: bcm2835: pll_off should only update CM_PLL_ANARST
parents 2aac7ddf d3d6f15f
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drivers/clk/bcm/clk-bcm2835.c
View file @ 5759d6cd
......@@ -12,9 +12,6 @@
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/**
......@@ -40,6 +37,7 @@
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/clk/bcm2835.h>
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
......@@ -51,6 +49,7 @@
#define CM_GNRICCTL 0x000
#define CM_GNRICDIV 0x004
# define CM_DIV_FRAC_BITS 12
# define CM_DIV_FRAC_MASK GENMASK(CM_DIV_FRAC_BITS - 1, 0)
#define CM_VPUCTL 0x008
#define CM_VPUDIV 0x00c
......@@ -118,6 +117,8 @@
#define CM_SDCCTL 0x1a8
#define CM_SDCDIV 0x1ac
#define CM_ARMCTL 0x1b0
#define CM_AVEOCTL 0x1b8
#define CM_AVEODIV 0x1bc
#define CM_EMMCCTL 0x1c0
#define CM_EMMCDIV 0x1c4
......@@ -128,6 +129,7 @@
# define CM_GATE BIT(CM_GATE_BIT)
# define CM_BUSY BIT(7)
# define CM_BUSYD BIT(8)
# define CM_FRAC BIT(9)
# define CM_SRC_SHIFT 0
# define CM_SRC_BITS 4
# define CM_SRC_MASK 0xf
......@@ -297,11 +299,11 @@
struct bcm2835_cprman {
struct device *dev;
void __iomem *regs;
spinlock_t regs_lock;
spinlock_t regs_lock; /* spinlock for all clocks */
const char *osc_name;
struct clk_onecell_data onecell;
struct clk *clks[BCM2835_CLOCK_COUNT];
struct clk *clks[];
};
static inline void cprman_write(struct bcm2835_cprman *cprman, u32 reg, u32 val)
......@@ -314,6 +316,27 @@ static inline u32 cprman_read(struct bcm2835_cprman *cprman, u32 reg)
return readl(cprman->regs + reg);
}
static int bcm2835_debugfs_regset(struct bcm2835_cprman *cprman, u32 base,
struct debugfs_reg32 *regs, size_t nregs,
struct dentry *dentry)
{
struct dentry *regdump;
struct debugfs_regset32 *regset;
regset = devm_kzalloc(cprman->dev, sizeof(*regset), GFP_KERNEL);
if (!regset)
return -ENOMEM;
regset->regs = regs;
regset->nregs = nregs;
regset->base = cprman->regs + base;
regdump = debugfs_create_regset32("regdump", S_IRUGO, dentry,
regset);
return regdump ? 0 : -ENOMEM;
}
/*
* These are fixed clocks. They're probably not all root clocks and it may
* be possible to turn them on and off but until this is mapped out better
......@@ -394,115 +417,10 @@ static const struct bcm2835_pll_ana_bits bcm2835_ana_pllh = {
.fb_prediv_mask = BIT(11),
};
/*
* PLLA is the auxiliary PLL, used to drive the CCP2 (Compact Camera
* Port 2) transmitter clock.
*
* It is in the PX LDO power domain, which is on when the AUDIO domain
* is on.
*/
static const struct bcm2835_pll_data bcm2835_plla_data = {
.name = "plla",
.cm_ctrl_reg = CM_PLLA,
.a2w_ctrl_reg = A2W_PLLA_CTRL,
.frac_reg = A2W_PLLA_FRAC,
.ana_reg_base = A2W_PLLA_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_PLLA_ENABLE,
.lock_mask = CM_LOCK_FLOCKA,
.ana = &bcm2835_ana_default,
.min_rate = 600000000u,
.max_rate = 2400000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE,
};
/* PLLB is used for the ARM's clock. */
static const struct bcm2835_pll_data bcm2835_pllb_data = {
.name = "pllb",
.cm_ctrl_reg = CM_PLLB,
.a2w_ctrl_reg = A2W_PLLB_CTRL,
.frac_reg = A2W_PLLB_FRAC,
.ana_reg_base = A2W_PLLB_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_PLLB_ENABLE,
.lock_mask = CM_LOCK_FLOCKB,
.ana = &bcm2835_ana_default,
.min_rate = 600000000u,
.max_rate = 3000000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE,
};
/*
* PLLC is the core PLL, used to drive the core VPU clock.
*
* It is in the PX LDO power domain, which is on when the AUDIO domain
* is on.
*/
static const struct bcm2835_pll_data bcm2835_pllc_data = {
.name = "pllc",
.cm_ctrl_reg = CM_PLLC,
.a2w_ctrl_reg = A2W_PLLC_CTRL,
.frac_reg = A2W_PLLC_FRAC,
.ana_reg_base = A2W_PLLC_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_PLLC_ENABLE,
.lock_mask = CM_LOCK_FLOCKC,
.ana = &bcm2835_ana_default,
.min_rate = 600000000u,
.max_rate = 3000000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE,
};
/*
* PLLD is the display PLL, used to drive DSI display panels.
*
* It is in the PX LDO power domain, which is on when the AUDIO domain
* is on.
*/
static const struct bcm2835_pll_data bcm2835_plld_data = {
.name = "plld",
.cm_ctrl_reg = CM_PLLD,
.a2w_ctrl_reg = A2W_PLLD_CTRL,
.frac_reg = A2W_PLLD_FRAC,
.ana_reg_base = A2W_PLLD_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_DDR_ENABLE,
.lock_mask = CM_LOCK_FLOCKD,
.ana = &bcm2835_ana_default,
.min_rate = 600000000u,
.max_rate = 2400000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE,
};
/*
* PLLH is used to supply the pixel clock or the AUX clock for the TV
* encoder.
*
* It is in the HDMI power domain.
*/
static const struct bcm2835_pll_data bcm2835_pllh_data = {
"pllh",
.cm_ctrl_reg = CM_PLLH,
.a2w_ctrl_reg = A2W_PLLH_CTRL,
.frac_reg = A2W_PLLH_FRAC,
.ana_reg_base = A2W_PLLH_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_PLLC_ENABLE,
.lock_mask = CM_LOCK_FLOCKH,
.ana = &bcm2835_ana_pllh,
.min_rate = 600000000u,
.max_rate = 3000000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE,
};
struct bcm2835_pll_divider_data {
const char *name;
const struct bcm2835_pll_data *source_pll;
const char *source_pll;
u32 cm_reg;
u32 a2w_reg;
......@@ -511,124 +429,6 @@ struct bcm2835_pll_divider_data {
u32 fixed_divider;
};
static const struct bcm2835_pll_divider_data bcm2835_plla_core_data = {
.name = "plla_core",
.source_pll = &bcm2835_plla_data,
.cm_reg = CM_PLLA,
.a2w_reg = A2W_PLLA_CORE,
.load_mask = CM_PLLA_LOADCORE,
.hold_mask = CM_PLLA_HOLDCORE,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_plla_per_data = {
.name = "plla_per",
.source_pll = &bcm2835_plla_data,
.cm_reg = CM_PLLA,
.a2w_reg = A2W_PLLA_PER,
.load_mask = CM_PLLA_LOADPER,
.hold_mask = CM_PLLA_HOLDPER,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_pllb_arm_data = {
.name = "pllb_arm",
.source_pll = &bcm2835_pllb_data,
.cm_reg = CM_PLLB,
.a2w_reg = A2W_PLLB_ARM,
.load_mask = CM_PLLB_LOADARM,
.hold_mask = CM_PLLB_HOLDARM,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_pllc_core0_data = {
.name = "pllc_core0",
.source_pll = &bcm2835_pllc_data,
.cm_reg = CM_PLLC,
.a2w_reg = A2W_PLLC_CORE0,
.load_mask = CM_PLLC_LOADCORE0,
.hold_mask = CM_PLLC_HOLDCORE0,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_pllc_core1_data = {
.name = "pllc_core1", .source_pll = &bcm2835_pllc_data,
.cm_reg = CM_PLLC, A2W_PLLC_CORE1,
.load_mask = CM_PLLC_LOADCORE1,
.hold_mask = CM_PLLC_HOLDCORE1,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_pllc_core2_data = {
.name = "pllc_core2",
.source_pll = &bcm2835_pllc_data,
.cm_reg = CM_PLLC,
.a2w_reg = A2W_PLLC_CORE2,
.load_mask = CM_PLLC_LOADCORE2,
.hold_mask = CM_PLLC_HOLDCORE2,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_pllc_per_data = {
.name = "pllc_per",
.source_pll = &bcm2835_pllc_data,
.cm_reg = CM_PLLC,
.a2w_reg = A2W_PLLC_PER,
.load_mask = CM_PLLC_LOADPER,
.hold_mask = CM_PLLC_HOLDPER,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_plld_core_data = {
.name = "plld_core",
.source_pll = &bcm2835_plld_data,
.cm_reg = CM_PLLD,
.a2w_reg = A2W_PLLD_CORE,
.load_mask = CM_PLLD_LOADCORE,
.hold_mask = CM_PLLD_HOLDCORE,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_plld_per_data = {
.name = "plld_per",
.source_pll = &bcm2835_plld_data,
.cm_reg = CM_PLLD,
.a2w_reg = A2W_PLLD_PER,
.load_mask = CM_PLLD_LOADPER,
.hold_mask = CM_PLLD_HOLDPER,
.fixed_divider = 1,
};
static const struct bcm2835_pll_divider_data bcm2835_pllh_rcal_data = {
.name = "pllh_rcal",
.source_pll = &bcm2835_pllh_data,
.cm_reg = CM_PLLH,
.a2w_reg = A2W_PLLH_RCAL,
.load_mask = CM_PLLH_LOADRCAL,
.hold_mask = 0,
.fixed_divider = 10,
};
static const struct bcm2835_pll_divider_data bcm2835_pllh_aux_data = {
.name = "pllh_aux",
.source_pll = &bcm2835_pllh_data,
.cm_reg = CM_PLLH,
.a2w_reg = A2W_PLLH_AUX,
.load_mask = CM_PLLH_LOADAUX,
.hold_mask = 0,
.fixed_divider = 10,
};
static const struct bcm2835_pll_divider_data bcm2835_pllh_pix_data = {
.name = "pllh_pix",
.source_pll = &bcm2835_pllh_data,
.cm_reg = CM_PLLH,
.a2w_reg = A2W_PLLH_PIX,
.load_mask = CM_PLLH_LOADPIX,
.hold_mask = 0,
.fixed_divider = 10,
};
struct bcm2835_clock_data {
const char *name;
......@@ -644,213 +444,40 @@ struct bcm2835_clock_data {
u32 frac_bits;
bool is_vpu_clock;
bool is_mash_clock;
};
static const char *const bcm2835_clock_per_parents[] = {
"gnd",
"xosc",
"testdebug0",
"testdebug1",
"plla_per",
"pllc_per",
"plld_per",
"pllh_aux",
};
static const char *const bcm2835_clock_vpu_parents[] = {
"gnd",
"xosc",
"testdebug0",
"testdebug1",
"plla_core",
"pllc_core0",
"plld_core",
"pllh_aux",
"pllc_core1",
"pllc_core2",
};
struct bcm2835_gate_data {
const char *name;
const char *parent;
static const char *const bcm2835_clock_osc_parents[] = {
"gnd",
"xosc",
"testdebug0",
"testdebug1"
u32 ctl_reg;
};
/*
* Used for a 1Mhz clock for the system clocksource, and also used by
* the watchdog timer and the camera pulse generator.
*/
static const struct bcm2835_clock_data bcm2835_clock_timer_data = {
.name = "timer",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_osc_parents),
.parents = bcm2835_clock_osc_parents,
.ctl_reg = CM_TIMERCTL,
.div_reg = CM_TIMERDIV,
.int_bits = 6,
.frac_bits = 12,
struct bcm2835_pll {
struct clk_hw hw;
struct bcm2835_cprman *cprman;
const struct bcm2835_pll_data *data;
};
/* One Time Programmable Memory clock. Maximum 10Mhz. */
static const struct bcm2835_clock_data bcm2835_clock_otp_data = {
.name = "otp",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_osc_parents),
.parents = bcm2835_clock_osc_parents,
.ctl_reg = CM_OTPCTL,
.div_reg = CM_OTPDIV,
.int_bits = 4,
.frac_bits = 0,
};
static int bcm2835_pll_is_on(struct clk_hw *hw)
{
struct bcm2835_pll *pll = container_of(hw, struct bcm2835_pll, hw);
struct bcm2835_cprman *cprman = pll->cprman;
const struct bcm2835_pll_data *data = pll->data;
/*
* VPU clock. This doesn't have an enable bit, since it drives the
* bus for everything else, and is special so it doesn't need to be
* gated for rate changes. It is also known as "clk_audio" in various
* hardware documentation.
*/
static const struct bcm2835_clock_data bcm2835_clock_vpu_data = {
.name = "vpu",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents),
.parents = bcm2835_clock_vpu_parents,
.ctl_reg = CM_VPUCTL,
.div_reg = CM_VPUDIV,
.int_bits = 12,
.frac_bits = 8,
.is_vpu_clock = true,
};
return cprman_read(cprman, data->a2w_ctrl_reg) &
A2W_PLL_CTRL_PRST_DISABLE;
}
static const struct bcm2835_clock_data bcm2835_clock_v3d_data = {
.name = "v3d",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents),
.parents = bcm2835_clock_vpu_parents,
.ctl_reg = CM_V3DCTL,
.div_reg = CM_V3DDIV,
.int_bits = 4,
.frac_bits = 8,
};
static void bcm2835_pll_choose_ndiv_and_fdiv(unsigned long rate,
unsigned long parent_rate,
u32 *ndiv, u32 *fdiv)
{
u64 div;
static const struct bcm2835_clock_data bcm2835_clock_isp_data = {
.name = "isp",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents),
.parents = bcm2835_clock_vpu_parents,
.ctl_reg = CM_ISPCTL,
.div_reg = CM_ISPDIV,
.int_bits = 4,
.frac_bits = 8,
};
static const struct bcm2835_clock_data bcm2835_clock_h264_data = {
.name = "h264",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents),
.parents = bcm2835_clock_vpu_parents,
.ctl_reg = CM_H264CTL,
.div_reg = CM_H264DIV,
.int_bits = 4,
.frac_bits = 8,
};
/* TV encoder clock. Only operating frequency is 108Mhz. */
static const struct bcm2835_clock_data bcm2835_clock_vec_data = {
.name = "vec",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents),
.parents = bcm2835_clock_per_parents,
.ctl_reg = CM_VECCTL,
.div_reg = CM_VECDIV,
.int_bits = 4,
.frac_bits = 0,
};
static const struct bcm2835_clock_data bcm2835_clock_uart_data = {
.name = "uart",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents),
.parents = bcm2835_clock_per_parents,
.ctl_reg = CM_UARTCTL,
.div_reg = CM_UARTDIV,
.int_bits = 10,
.frac_bits = 12,
};
/* HDMI state machine */
static const struct bcm2835_clock_data bcm2835_clock_hsm_data = {
.name = "hsm",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents),
.parents = bcm2835_clock_per_parents,
.ctl_reg = CM_HSMCTL,
.div_reg = CM_HSMDIV,
.int_bits = 4,
.frac_bits = 8,
};
/*
* Secondary SDRAM clock. Used for low-voltage modes when the PLL in
* the SDRAM controller can't be used.
*/
static const struct bcm2835_clock_data bcm2835_clock_sdram_data = {
.name = "sdram",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents),
.parents = bcm2835_clock_vpu_parents,
.ctl_reg = CM_SDCCTL,
.div_reg = CM_SDCDIV,
.int_bits = 6,
.frac_bits = 0,
};
/* Clock for the temperature sensor. Generally run at 2Mhz, max 5Mhz. */
static const struct bcm2835_clock_data bcm2835_clock_tsens_data = {
.name = "tsens",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_osc_parents),
.parents = bcm2835_clock_osc_parents,
.ctl_reg = CM_TSENSCTL,
.div_reg = CM_TSENSDIV,
.int_bits = 5,
.frac_bits = 0,
};
/* Arasan EMMC clock */
static const struct bcm2835_clock_data bcm2835_clock_emmc_data = {
.name = "emmc",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents),
.parents = bcm2835_clock_per_parents,
.ctl_reg = CM_EMMCCTL,
.div_reg = CM_EMMCDIV,
.int_bits = 4,
.frac_bits = 8,
};
static const struct bcm2835_clock_data bcm2835_clock_pwm_data = {
.name = "pwm",
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents),
.parents = bcm2835_clock_per_parents,
.ctl_reg = CM_PWMCTL,
.div_reg = CM_PWMDIV,
.int_bits = 12,
.frac_bits = 12,
};
struct bcm2835_pll {
struct clk_hw hw;
struct bcm2835_cprman *cprman;
const struct bcm2835_pll_data *data;
};
static int bcm2835_pll_is_on(struct clk_hw *hw)
{
struct bcm2835_pll *pll = container_of(hw, struct bcm2835_pll, hw);
struct bcm2835_cprman *cprman = pll->cprman;
const struct bcm2835_pll_data *data = pll->data;
return cprman_read(cprman, data->a2w_ctrl_reg) &
A2W_PLL_CTRL_PRST_DISABLE;
}
static void bcm2835_pll_choose_ndiv_and_fdiv(unsigned long rate,
unsigned long parent_rate,
u32 *ndiv, u32 *fdiv)
{
u64 div;
div = (u64)rate << A2W_PLL_FRAC_BITS;
do_div(div, parent_rate);
div = (u64)rate << A2W_PLL_FRAC_BITS;
do_div(div, parent_rate);
*ndiv = div >> A2W_PLL_FRAC_BITS;
*fdiv = div & ((1 << A2W_PLL_FRAC_BITS) - 1);
......@@ -910,8 +537,14 @@ static void bcm2835_pll_off(struct clk_hw *hw)
struct bcm2835_cprman *cprman = pll->cprman;
const struct bcm2835_pll_data *data = pll->data;
cprman_write(cprman, data->cm_ctrl_reg, CM_PLL_ANARST);
cprman_write(cprman, data->a2w_ctrl_reg, A2W_PLL_CTRL_PWRDN);
spin_lock(&cprman->regs_lock);
cprman_write(cprman, data->cm_ctrl_reg,
cprman_read(cprman, data->cm_ctrl_reg) |
CM_PLL_ANARST);
cprman_write(cprman, data->a2w_ctrl_reg,
cprman_read(cprman, data->a2w_ctrl_reg) |
A2W_PLL_CTRL_PWRDN);
spin_unlock(&cprman->regs_lock);
}
static int bcm2835_pll_on(struct clk_hw *hw)
......@@ -1030,6 +663,36 @@ static int bcm2835_pll_set_rate(struct clk_hw *hw,
return 0;
}
static int bcm2835_pll_debug_init(struct clk_hw *hw,
struct dentry *dentry)
{
struct bcm2835_pll *pll = container_of(hw, struct bcm2835_pll, hw);
struct bcm2835_cprman *cprman = pll->cprman;
const struct bcm2835_pll_data *data = pll->data;
struct debugfs_reg32 *regs;
regs = devm_kzalloc(cprman->dev, 7 * sizeof(*regs), GFP_KERNEL);
if (!regs)
return -ENOMEM;
regs[0].name = "cm_ctrl";
regs[0].offset = data->cm_ctrl_reg;
regs[1].name = "a2w_ctrl";
regs[1].offset = data->a2w_ctrl_reg;
regs[2].name = "frac";
regs[2].offset = data->frac_reg;
regs[3].name = "ana0";
regs[3].offset = data->ana_reg_base + 0 * 4;
regs[4].name = "ana1";
regs[4].offset = data->ana_reg_base + 1 * 4;
regs[5].name = "ana2";
regs[5].offset = data->ana_reg_base + 2 * 4;
regs[6].name = "ana3";
regs[6].offset = data->ana_reg_base + 3 * 4;
return bcm2835_debugfs_regset(cprman, 0, regs, 7, dentry);
}
static const struct clk_ops bcm2835_pll_clk_ops = {
.is_prepared = bcm2835_pll_is_on,
.prepare = bcm2835_pll_on,
......@@ -1037,6 +700,7 @@ static const struct clk_ops bcm2835_pll_clk_ops = {
.recalc_rate = bcm2835_pll_get_rate,
.set_rate = bcm2835_pll_set_rate,
.round_rate = bcm2835_pll_round_rate,
.debug_init = bcm2835_pll_debug_init,
};
struct bcm2835_pll_divider {
......@@ -1079,10 +743,12 @@ static void bcm2835_pll_divider_off(struct clk_hw *hw)
struct bcm2835_cprman *cprman = divider->cprman;
const struct bcm2835_pll_divider_data *data = divider->data;
spin_lock(&cprman->regs_lock);
cprman_write(cprman, data->cm_reg,
(cprman_read(cprman, data->cm_reg) &
~data->load_mask) | data->hold_mask);
cprman_write(cprman, data->a2w_reg, A2W_PLL_CHANNEL_DISABLE);
spin_unlock(&cprman->regs_lock);
}
static int bcm2835_pll_divider_on(struct clk_hw *hw)
......@@ -1091,12 +757,14 @@ static int bcm2835_pll_divider_on(struct clk_hw *hw)
struct bcm2835_cprman *cprman = divider->cprman;
const struct bcm2835_pll_divider_data *data = divider->data;
spin_lock(&cprman->regs_lock);
cprman_write(cprman, data->a2w_reg,
cprman_read(cprman, data->a2w_reg) &
~A2W_PLL_CHANNEL_DISABLE);
cprman_write(cprman, data->cm_reg,
cprman_read(cprman, data->cm_reg) & ~data->hold_mask);
spin_unlock(&cprman->regs_lock);
return 0;
}
......@@ -1124,6 +792,26 @@ static int bcm2835_pll_divider_set_rate(struct clk_hw *hw,
return 0;
}
static int bcm2835_pll_divider_debug_init(struct clk_hw *hw,
struct dentry *dentry)
{
struct bcm2835_pll_divider *divider = bcm2835_pll_divider_from_hw(hw);
struct bcm2835_cprman *cprman = divider->cprman;
const struct bcm2835_pll_divider_data *data = divider->data;
struct debugfs_reg32 *regs;
regs = devm_kzalloc(cprman->dev, 7 * sizeof(*regs), GFP_KERNEL);
if (!regs)
return -ENOMEM;
regs[0].name = "cm";
regs[0].offset = data->cm_reg;
regs[1].name = "a2w";
regs[1].offset = data->a2w_reg;
return bcm2835_debugfs_regset(cprman, 0, regs, 2, dentry);
}
static const struct clk_ops bcm2835_pll_divider_clk_ops = {
.is_prepared = bcm2835_pll_divider_is_on,
.prepare = bcm2835_pll_divider_on,
......@@ -1131,6 +819,7 @@ static const struct clk_ops bcm2835_pll_divider_clk_ops = {
.recalc_rate = bcm2835_pll_divider_get_rate,
.set_rate = bcm2835_pll_divider_set_rate,
.round_rate = bcm2835_pll_divider_round_rate,
.debug_init = bcm2835_pll_divider_debug_init,
};
/*
......@@ -1170,7 +859,7 @@ static u32 bcm2835_clock_choose_div(struct clk_hw *hw,
GENMASK(CM_DIV_FRAC_BITS - data->frac_bits, 0) >> 1;
u64 temp = (u64)parent_rate << CM_DIV_FRAC_BITS;
u64 rem;
u32 div;
u32 div, mindiv, maxdiv;
rem = do_div(temp, rate);
div = temp;
......@@ -1180,10 +869,23 @@ static u32 bcm2835_clock_choose_div(struct clk_hw *hw,
div += unused_frac_mask + 1;
div &= ~unused_frac_mask;
/* Clamp to the limits. */
div = max(div, unused_frac_mask + 1);
div = min_t(u32, div, GENMASK(data->int_bits + CM_DIV_FRAC_BITS - 1,
CM_DIV_FRAC_BITS - data->frac_bits));
/* different clamping limits apply for a mash clock */
if (data->is_mash_clock) {
/* clamp to min divider of 2 */
mindiv = 2 << CM_DIV_FRAC_BITS;
/* clamp to the highest possible integer divider */
maxdiv = (BIT(data->int_bits) - 1) << CM_DIV_FRAC_BITS;
} else {
/* clamp to min divider of 1 */
mindiv = 1 << CM_DIV_FRAC_BITS;
/* clamp to the highest possible fractional divider */
maxdiv = GENMASK(data->int_bits + CM_DIV_FRAC_BITS - 1,
CM_DIV_FRAC_BITS - data->frac_bits);
}
/* apply the clamping limits */
div = max_t(u32, div, mindiv);
div = min_t(u32, div, maxdiv);
return div;
}
......@@ -1277,9 +979,26 @@ static int bcm2835_clock_set_rate(struct clk_hw *hw,
struct bcm2835_cprman *cprman = clock->cprman;
const struct bcm2835_clock_data *data = clock->data;
u32 div = bcm2835_clock_choose_div(hw, rate, parent_rate, false);
u32 ctl;
spin_lock(&cprman->regs_lock);
/*
* Setting up frac support
*
* In principle it is recommended to stop/start the clock first,
* but as we set CLK_SET_RATE_GATE during registration of the
* clock this requirement should be take care of by the
* clk-framework.
*/
ctl = cprman_read(cprman, data->ctl_reg) & ~CM_FRAC;
ctl |= (div & CM_DIV_FRAC_MASK) ? CM_FRAC : 0;
cprman_write(cprman, data->ctl_reg, ctl);
cprman_write(cprman, data->div_reg, div);
spin_unlock(&cprman->regs_lock);
return 0;
}
......@@ -1342,6 +1061,30 @@ static u8 bcm2835_clock_get_parent(struct clk_hw *hw)
return (src & CM_SRC_MASK) >> CM_SRC_SHIFT;
}
static struct debugfs_reg32 bcm2835_debugfs_clock_reg32[] = {
{
.name = "ctl",
.offset = 0,
},
{
.name = "div",
.offset = 4,
},
};
static int bcm2835_clock_debug_init(struct clk_hw *hw,
struct dentry *dentry)
{
struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw);
struct bcm2835_cprman *cprman = clock->cprman;
const struct bcm2835_clock_data *data = clock->data;
return bcm2835_debugfs_regset(
cprman, data->ctl_reg,
bcm2835_debugfs_clock_reg32,
ARRAY_SIZE(bcm2835_debugfs_clock_reg32),
dentry);
}
static const struct clk_ops bcm2835_clock_clk_ops = {
.is_prepared = bcm2835_clock_is_on,
......@@ -1352,6 +1095,7 @@ static const struct clk_ops bcm2835_clock_clk_ops = {
.determine_rate = bcm2835_clock_determine_rate,
.set_parent = bcm2835_clock_set_parent,
.get_parent = bcm2835_clock_get_parent,
.debug_init = bcm2835_clock_debug_init,
};
static int bcm2835_vpu_clock_is_on(struct clk_hw *hw)
......@@ -1370,6 +1114,7 @@ static const struct clk_ops bcm2835_vpu_clock_clk_ops = {
.determine_rate = bcm2835_clock_determine_rate,
.set_parent = bcm2835_clock_set_parent,
.get_parent = bcm2835_clock_get_parent,
.debug_init = bcm2835_clock_debug_init,
};
static struct clk *bcm2835_register_pll(struct bcm2835_cprman *cprman,
......@@ -1418,7 +1163,7 @@ bcm2835_register_pll_divider(struct bcm2835_cprman *cprman,
memset(&init, 0, sizeof(init));
init.parent_names = &data->source_pll->name;
init.parent_names = &data->source_pll;
init.num_parents = 1;
init.name = divider_name;
init.ops = &bcm2835_pll_divider_clk_ops;
......@@ -1501,14 +1246,559 @@ static struct clk *bcm2835_register_clock(struct bcm2835_cprman *cprman,
return devm_clk_register(cprman->dev, &clock->hw);
}
static struct clk *bcm2835_register_gate(struct bcm2835_cprman *cprman,
const struct bcm2835_gate_data *data)
{
return clk_register_gate(cprman->dev, data->name, data->parent,
CLK_IGNORE_UNUSED | CLK_SET_RATE_GATE,
cprman->regs + data->ctl_reg,
CM_GATE_BIT, 0, &cprman->regs_lock);
}
typedef struct clk *(*bcm2835_clk_register)(struct bcm2835_cprman *cprman,
const void *data);
struct bcm2835_clk_desc {
bcm2835_clk_register clk_register;
const void *data;
};
/* assignment helper macros for different clock types */
#define _REGISTER(f, ...) { .clk_register = (bcm2835_clk_register)f, \
.data = __VA_ARGS__ }
#define REGISTER_PLL(...) _REGISTER(&bcm2835_register_pll, \
&(struct bcm2835_pll_data) \
{__VA_ARGS__})
#define REGISTER_PLL_DIV(...) _REGISTER(&bcm2835_register_pll_divider, \
&(struct bcm2835_pll_divider_data) \
{__VA_ARGS__})
#define REGISTER_CLK(...) _REGISTER(&bcm2835_register_clock, \
&(struct bcm2835_clock_data) \
{__VA_ARGS__})
#define REGISTER_GATE(...) _REGISTER(&bcm2835_register_gate, \
&(struct bcm2835_gate_data) \
{__VA_ARGS__})
/* parent mux arrays plus helper macros */
/* main oscillator parent mux */
static const char *const bcm2835_clock_osc_parents[] = {
"gnd",
"xosc",
"testdebug0",
"testdebug1"
};
#define REGISTER_OSC_CLK(...) REGISTER_CLK( \
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_osc_parents), \
.parents = bcm2835_clock_osc_parents, \
__VA_ARGS__)
/* main peripherial parent mux */
static const char *const bcm2835_clock_per_parents[] = {
"gnd",
"xosc",
"testdebug0",
"testdebug1",
"plla_per",
"pllc_per",
"plld_per",
"pllh_aux",
};
#define REGISTER_PER_CLK(...) REGISTER_CLK( \
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents), \
.parents = bcm2835_clock_per_parents, \
__VA_ARGS__)
/* main vpu parent mux */
static const char *const bcm2835_clock_vpu_parents[] = {
"gnd",
"xosc",
"testdebug0",
"testdebug1",
"plla_core",
"pllc_core0",
"plld_core",
"pllh_aux",
"pllc_core1",
"pllc_core2",
};
#define REGISTER_VPU_CLK(...) REGISTER_CLK( \
.num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents), \
.parents = bcm2835_clock_vpu_parents, \
__VA_ARGS__)
/*
* the real definition of all the pll, pll_dividers and clocks
* these make use of the above REGISTER_* macros
*/
static const struct bcm2835_clk_desc clk_desc_array[] = {
/* the PLL + PLL dividers */
/*
* PLLA is the auxiliary PLL, used to drive the CCP2
* (Compact Camera Port 2) transmitter clock.
*
* It is in the PX LDO power domain, which is on when the
* AUDIO domain is on.
*/
[BCM2835_PLLA] = REGISTER_PLL(
.name = "plla",
.cm_ctrl_reg = CM_PLLA,
.a2w_ctrl_reg = A2W_PLLA_CTRL,
.frac_reg = A2W_PLLA_FRAC,
.ana_reg_base = A2W_PLLA_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_PLLA_ENABLE,
.lock_mask = CM_LOCK_FLOCKA,
.ana = &bcm2835_ana_default,
.min_rate = 600000000u,
.max_rate = 2400000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE),
[BCM2835_PLLA_CORE] = REGISTER_PLL_DIV(
.name = "plla_core",
.source_pll = "plla",
.cm_reg = CM_PLLA,
.a2w_reg = A2W_PLLA_CORE,
.load_mask = CM_PLLA_LOADCORE,
.hold_mask = CM_PLLA_HOLDCORE,
.fixed_divider = 1),
[BCM2835_PLLA_PER] = REGISTER_PLL_DIV(
.name = "plla_per",
.source_pll = "plla",
.cm_reg = CM_PLLA,
.a2w_reg = A2W_PLLA_PER,
.load_mask = CM_PLLA_LOADPER,
.hold_mask = CM_PLLA_HOLDPER,
.fixed_divider = 1),
[BCM2835_PLLA_DSI0] = REGISTER_PLL_DIV(
.name = "plla_dsi0",
.source_pll = "plla",
.cm_reg = CM_PLLA,
.a2w_reg = A2W_PLLA_DSI0,
.load_mask = CM_PLLA_LOADDSI0,
.hold_mask = CM_PLLA_HOLDDSI0,
.fixed_divider = 1),
[BCM2835_PLLA_CCP2] = REGISTER_PLL_DIV(
.name = "plla_ccp2",
.source_pll = "plla",
.cm_reg = CM_PLLA,
.a2w_reg = A2W_PLLA_CCP2,
.load_mask = CM_PLLA_LOADCCP2,
.hold_mask = CM_PLLA_HOLDCCP2,
.fixed_divider = 1),
/* PLLB is used for the ARM's clock. */
[BCM2835_PLLB] = REGISTER_PLL(
.name = "pllb",
.cm_ctrl_reg = CM_PLLB,
.a2w_ctrl_reg = A2W_PLLB_CTRL,
.frac_reg = A2W_PLLB_FRAC,
.ana_reg_base = A2W_PLLB_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_PLLB_ENABLE,
.lock_mask = CM_LOCK_FLOCKB,
.ana = &bcm2835_ana_default,
.min_rate = 600000000u,
.max_rate = 3000000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE),
[BCM2835_PLLB_ARM] = REGISTER_PLL_DIV(
.name = "pllb_arm",
.source_pll = "pllb",
.cm_reg = CM_PLLB,
.a2w_reg = A2W_PLLB_ARM,
.load_mask = CM_PLLB_LOADARM,
.hold_mask = CM_PLLB_HOLDARM,
.fixed_divider = 1),
/*
* PLLC is the core PLL, used to drive the core VPU clock.
*
* It is in the PX LDO power domain, which is on when the
* AUDIO domain is on.
*/
[BCM2835_PLLC] = REGISTER_PLL(
.name = "pllc",
.cm_ctrl_reg = CM_PLLC,
.a2w_ctrl_reg = A2W_PLLC_CTRL,
.frac_reg = A2W_PLLC_FRAC,
.ana_reg_base = A2W_PLLC_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_PLLC_ENABLE,
.lock_mask = CM_LOCK_FLOCKC,
.ana = &bcm2835_ana_default,
.min_rate = 600000000u,
.max_rate = 3000000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE),
[BCM2835_PLLC_CORE0] = REGISTER_PLL_DIV(
.name = "pllc_core0",
.source_pll = "pllc",
.cm_reg = CM_PLLC,
.a2w_reg = A2W_PLLC_CORE0,
.load_mask = CM_PLLC_LOADCORE0,
.hold_mask = CM_PLLC_HOLDCORE0,
.fixed_divider = 1),
[BCM2835_PLLC_CORE1] = REGISTER_PLL_DIV(
.name = "pllc_core1",
.source_pll = "pllc",
.cm_reg = CM_PLLC,
.a2w_reg = A2W_PLLC_CORE1,
.load_mask = CM_PLLC_LOADCORE1,
.hold_mask = CM_PLLC_HOLDCORE1,
.fixed_divider = 1),
[BCM2835_PLLC_CORE2] = REGISTER_PLL_DIV(
.name = "pllc_core2",
.source_pll = "pllc",
.cm_reg = CM_PLLC,
.a2w_reg = A2W_PLLC_CORE2,
.load_mask = CM_PLLC_LOADCORE2,
.hold_mask = CM_PLLC_HOLDCORE2,
.fixed_divider = 1),
[BCM2835_PLLC_PER] = REGISTER_PLL_DIV(
.name = "pllc_per",
.source_pll = "pllc",
.cm_reg = CM_PLLC,
.a2w_reg = A2W_PLLC_PER,
.load_mask = CM_PLLC_LOADPER,
.hold_mask = CM_PLLC_HOLDPER,
.fixed_divider = 1),
/*
* PLLD is the display PLL, used to drive DSI display panels.
*
* It is in the PX LDO power domain, which is on when the
* AUDIO domain is on.
*/
[BCM2835_PLLD] = REGISTER_PLL(
.name = "plld",
.cm_ctrl_reg = CM_PLLD,
.a2w_ctrl_reg = A2W_PLLD_CTRL,
.frac_reg = A2W_PLLD_FRAC,
.ana_reg_base = A2W_PLLD_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_DDR_ENABLE,
.lock_mask = CM_LOCK_FLOCKD,
.ana = &bcm2835_ana_default,
.min_rate = 600000000u,
.max_rate = 2400000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE),
[BCM2835_PLLD_CORE] = REGISTER_PLL_DIV(
.name = "plld_core",
.source_pll = "plld",
.cm_reg = CM_PLLD,
.a2w_reg = A2W_PLLD_CORE,
.load_mask = CM_PLLD_LOADCORE,
.hold_mask = CM_PLLD_HOLDCORE,
.fixed_divider = 1),
[BCM2835_PLLD_PER] = REGISTER_PLL_DIV(
.name = "plld_per",
.source_pll = "plld",
.cm_reg = CM_PLLD,
.a2w_reg = A2W_PLLD_PER,
.load_mask = CM_PLLD_LOADPER,
.hold_mask = CM_PLLD_HOLDPER,
.fixed_divider = 1),
[BCM2835_PLLD_DSI0] = REGISTER_PLL_DIV(
.name = "plld_dsi0",
.source_pll = "plld",
.cm_reg = CM_PLLD,
.a2w_reg = A2W_PLLD_DSI0,
.load_mask = CM_PLLD_LOADDSI0,
.hold_mask = CM_PLLD_HOLDDSI0,
.fixed_divider = 1),
[BCM2835_PLLD_DSI1] = REGISTER_PLL_DIV(
.name = "plld_dsi1",
.source_pll = "plld",
.cm_reg = CM_PLLD,
.a2w_reg = A2W_PLLD_DSI1,
.load_mask = CM_PLLD_LOADDSI1,
.hold_mask = CM_PLLD_HOLDDSI1,
.fixed_divider = 1),
/*
* PLLH is used to supply the pixel clock or the AUX clock for the
* TV encoder.
*
* It is in the HDMI power domain.
*/
[BCM2835_PLLH] = REGISTER_PLL(
"pllh",
.cm_ctrl_reg = CM_PLLH,
.a2w_ctrl_reg = A2W_PLLH_CTRL,
.frac_reg = A2W_PLLH_FRAC,
.ana_reg_base = A2W_PLLH_ANA0,
.reference_enable_mask = A2W_XOSC_CTRL_PLLC_ENABLE,
.lock_mask = CM_LOCK_FLOCKH,
.ana = &bcm2835_ana_pllh,
.min_rate = 600000000u,
.max_rate = 3000000000u,
.max_fb_rate = BCM2835_MAX_FB_RATE),
[BCM2835_PLLH_RCAL] = REGISTER_PLL_DIV(
.name = "pllh_rcal",
.source_pll = "pllh",
.cm_reg = CM_PLLH,
.a2w_reg = A2W_PLLH_RCAL,
.load_mask = CM_PLLH_LOADRCAL,
.hold_mask = 0,
.fixed_divider = 10),
[BCM2835_PLLH_AUX] = REGISTER_PLL_DIV(
.name = "pllh_aux",
.source_pll = "pllh",
.cm_reg = CM_PLLH,
.a2w_reg = A2W_PLLH_AUX,
.load_mask = CM_PLLH_LOADAUX,
.hold_mask = 0,
.fixed_divider = 10),
[BCM2835_PLLH_PIX] = REGISTER_PLL_DIV(
.name = "pllh_pix",
.source_pll = "pllh",
.cm_reg = CM_PLLH,
.a2w_reg = A2W_PLLH_PIX,
.load_mask = CM_PLLH_LOADPIX,
.hold_mask = 0,
.fixed_divider = 10),
/* the clocks */
/* clocks with oscillator parent mux */
/* One Time Programmable Memory clock. Maximum 10Mhz. */
[BCM2835_CLOCK_OTP] = REGISTER_OSC_CLK(
.name = "otp",
.ctl_reg = CM_OTPCTL,
.div_reg = CM_OTPDIV,
.int_bits = 4,
.frac_bits = 0),
/*
* Used for a 1Mhz clock for the system clocksource, and also used
* bythe watchdog timer and the camera pulse generator.
*/
[BCM2835_CLOCK_TIMER] = REGISTER_OSC_CLK(
.name = "timer",
.ctl_reg = CM_TIMERCTL,
.div_reg = CM_TIMERDIV,
.int_bits = 6,
.frac_bits = 12),
/*
* Clock for the temperature sensor.
* Generally run at 2Mhz, max 5Mhz.
*/
[BCM2835_CLOCK_TSENS] = REGISTER_OSC_CLK(
.name = "tsens",
.ctl_reg = CM_TSENSCTL,
.div_reg = CM_TSENSDIV,
.int_bits = 5,
.frac_bits = 0),
[BCM2835_CLOCK_TEC] = REGISTER_OSC_CLK(
.name = "tec",
.ctl_reg = CM_TECCTL,
.div_reg = CM_TECDIV,
.int_bits = 6,
.frac_bits = 0),
/* clocks with vpu parent mux */
[BCM2835_CLOCK_H264] = REGISTER_VPU_CLK(
.name = "h264",
.ctl_reg = CM_H264CTL,
.div_reg = CM_H264DIV,
.int_bits = 4,
.frac_bits = 8),
[BCM2835_CLOCK_ISP] = REGISTER_VPU_CLK(
.name = "isp",
.ctl_reg = CM_ISPCTL,
.div_reg = CM_ISPDIV,
.int_bits = 4,
.frac_bits = 8),
/*
* Secondary SDRAM clock. Used for low-voltage modes when the PLL
* in the SDRAM controller can't be used.
*/
[BCM2835_CLOCK_SDRAM] = REGISTER_VPU_CLK(
.name = "sdram",
.ctl_reg = CM_SDCCTL,
.div_reg = CM_SDCDIV,
.int_bits = 6,
.frac_bits = 0),
[BCM2835_CLOCK_V3D] = REGISTER_VPU_CLK(
.name = "v3d",
.ctl_reg = CM_V3DCTL,
.div_reg = CM_V3DDIV,
.int_bits = 4,
.frac_bits = 8),
/*
* VPU clock. This doesn't have an enable bit, since it drives
* the bus for everything else, and is special so it doesn't need
* to be gated for rate changes. It is also known as "clk_audio"
* in various hardware documentation.
*/
[BCM2835_CLOCK_VPU] = REGISTER_VPU_CLK(
.name = "vpu",
.ctl_reg = CM_VPUCTL,
.div_reg = CM_VPUDIV,
.int_bits = 12,
.frac_bits = 8,
.is_vpu_clock = true),
/* clocks with per parent mux */
[BCM2835_CLOCK_AVEO] = REGISTER_PER_CLK(
.name = "aveo",
.ctl_reg = CM_AVEOCTL,
.div_reg = CM_AVEODIV,
.int_bits = 4,
.frac_bits = 0),
[BCM2835_CLOCK_CAM0] = REGISTER_PER_CLK(
.name = "cam0",
.ctl_reg = CM_CAM0CTL,
.div_reg = CM_CAM0DIV,
.int_bits = 4,
.frac_bits = 8),
[BCM2835_CLOCK_CAM1] = REGISTER_PER_CLK(
.name = "cam1",
.ctl_reg = CM_CAM1CTL,
.div_reg = CM_CAM1DIV,
.int_bits = 4,
.frac_bits = 8),
[BCM2835_CLOCK_DFT] = REGISTER_PER_CLK(
.name = "dft",
.ctl_reg = CM_DFTCTL,
.div_reg = CM_DFTDIV,
.int_bits = 5,
.frac_bits = 0),
[BCM2835_CLOCK_DPI] = REGISTER_PER_CLK(
.name = "dpi",
.ctl_reg = CM_DPICTL,
.div_reg = CM_DPIDIV,
.int_bits = 4,
.frac_bits = 8),
/* Arasan EMMC clock */
[BCM2835_CLOCK_EMMC] = REGISTER_PER_CLK(
.name = "emmc",
.ctl_reg = CM_EMMCCTL,
.div_reg = CM_EMMCDIV,
.int_bits = 4,
.frac_bits = 8),
/* General purpose (GPIO) clocks */
[BCM2835_CLOCK_GP0] = REGISTER_PER_CLK(
.name = "gp0",
.ctl_reg = CM_GP0CTL,
.div_reg = CM_GP0DIV,
.int_bits = 12,
.frac_bits = 12,
.is_mash_clock = true),
[BCM2835_CLOCK_GP1] = REGISTER_PER_CLK(
.name = "gp1",
.ctl_reg = CM_GP1CTL,
.div_reg = CM_GP1DIV,
.int_bits = 12,
.frac_bits = 12,
.is_mash_clock = true),
[BCM2835_CLOCK_GP2] = REGISTER_PER_CLK(
.name = "gp2",
.ctl_reg = CM_GP2CTL,
.div_reg = CM_GP2DIV,
.int_bits = 12,
.frac_bits = 12),
/* HDMI state machine */
[BCM2835_CLOCK_HSM] = REGISTER_PER_CLK(
.name = "hsm",
.ctl_reg = CM_HSMCTL,
.div_reg = CM_HSMDIV,
.int_bits = 4,
.frac_bits = 8),
[BCM2835_CLOCK_PCM] = REGISTER_PER_CLK(
.name = "pcm",
.ctl_reg = CM_PCMCTL,
.div_reg = CM_PCMDIV,
.int_bits = 12,
.frac_bits = 12,
.is_mash_clock = true),
[BCM2835_CLOCK_PWM] = REGISTER_PER_CLK(
.name = "pwm",
.ctl_reg = CM_PWMCTL,
.div_reg = CM_PWMDIV,
.int_bits = 12,
.frac_bits = 12,
.is_mash_clock = true),
[BCM2835_CLOCK_SLIM] = REGISTER_PER_CLK(
.name = "slim",
.ctl_reg = CM_SLIMCTL,
.div_reg = CM_SLIMDIV,
.int_bits = 12,
.frac_bits = 12,
.is_mash_clock = true),
[BCM2835_CLOCK_SMI] = REGISTER_PER_CLK(
.name = "smi",
.ctl_reg = CM_SMICTL,
.div_reg = CM_SMIDIV,
.int_bits = 4,
.frac_bits = 8),
[BCM2835_CLOCK_UART] = REGISTER_PER_CLK(
.name = "uart",
.ctl_reg = CM_UARTCTL,
.div_reg = CM_UARTDIV,
.int_bits = 10,
.frac_bits = 12),
/* TV encoder clock. Only operating frequency is 108Mhz. */
[BCM2835_CLOCK_VEC] = REGISTER_PER_CLK(
.name = "vec",
.ctl_reg = CM_VECCTL,
.div_reg = CM_VECDIV,
.int_bits = 4,
.frac_bits = 0),
/* dsi clocks */
[BCM2835_CLOCK_DSI0E] = REGISTER_PER_CLK(
.name = "dsi0e",
.ctl_reg = CM_DSI0ECTL,
.div_reg = CM_DSI0EDIV,
.int_bits = 4,
.frac_bits = 8),
[BCM2835_CLOCK_DSI1E] = REGISTER_PER_CLK(
.name = "dsi1e",
.ctl_reg = CM_DSI1ECTL,
.div_reg = CM_DSI1EDIV,
.int_bits = 4,
.frac_bits = 8),
/* the gates */
/*
* CM_PERIICTL (and CM_PERIACTL, CM_SYSCTL and CM_VPUCTL if
* you have the debug bit set in the power manager, which we
* don't bother exposing) are individual gates off of the
* non-stop vpu clock.
*/
[BCM2835_CLOCK_PERI_IMAGE] = REGISTER_GATE(
.name = "peri_image",
.parent = "vpu",
.ctl_reg = CM_PERIICTL),
};
static int bcm2835_clk_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct clk **clks;
struct bcm2835_cprman *cprman;
struct resource *res;
const struct bcm2835_clk_desc *desc;
const size_t asize = ARRAY_SIZE(clk_desc_array);
size_t i;
cprman = devm_kzalloc(dev, sizeof(*cprman), GFP_KERNEL);
cprman = devm_kzalloc(dev,
sizeof(*cprman) + asize * sizeof(*clks),
GFP_KERNEL);
if (!cprman)
return -ENOMEM;
......@@ -1525,80 +1815,15 @@ static int bcm2835_clk_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, cprman);
cprman->onecell.clk_num = BCM2835_CLOCK_COUNT;
cprman->onecell.clk_num = asize;
cprman->onecell.clks = cprman->clks;
clks = cprman->clks;
clks[BCM2835_PLLA] = bcm2835_register_pll(cprman, &bcm2835_plla_data);
clks[BCM2835_PLLB] = bcm2835_register_pll(cprman, &bcm2835_pllb_data);
clks[BCM2835_PLLC] = bcm2835_register_pll(cprman, &bcm2835_pllc_data);
clks[BCM2835_PLLD] = bcm2835_register_pll(cprman, &bcm2835_plld_data);
clks[BCM2835_PLLH] = bcm2835_register_pll(cprman, &bcm2835_pllh_data);
clks[BCM2835_PLLA_CORE] =
bcm2835_register_pll_divider(cprman, &bcm2835_plla_core_data);
clks[BCM2835_PLLA_PER] =
bcm2835_register_pll_divider(cprman, &bcm2835_plla_per_data);
clks[BCM2835_PLLC_CORE0] =
bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core0_data);
clks[BCM2835_PLLC_CORE1] =
bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core1_data);
clks[BCM2835_PLLC_CORE2] =
bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core2_data);
clks[BCM2835_PLLC_PER] =
bcm2835_register_pll_divider(cprman, &bcm2835_pllc_per_data);
clks[BCM2835_PLLD_CORE] =
bcm2835_register_pll_divider(cprman, &bcm2835_plld_core_data);
clks[BCM2835_PLLD_PER] =
bcm2835_register_pll_divider(cprman, &bcm2835_plld_per_data);
clks[BCM2835_PLLH_RCAL] =
bcm2835_register_pll_divider(cprman, &bcm2835_pllh_rcal_data);
clks[BCM2835_PLLH_AUX] =
bcm2835_register_pll_divider(cprman, &bcm2835_pllh_aux_data);
clks[BCM2835_PLLH_PIX] =
bcm2835_register_pll_divider(cprman, &bcm2835_pllh_pix_data);
clks[BCM2835_CLOCK_TIMER] =
bcm2835_register_clock(cprman, &bcm2835_clock_timer_data);
clks[BCM2835_CLOCK_OTP] =
bcm2835_register_clock(cprman, &bcm2835_clock_otp_data);
clks[BCM2835_CLOCK_TSENS] =
bcm2835_register_clock(cprman, &bcm2835_clock_tsens_data);
clks[BCM2835_CLOCK_VPU] =
bcm2835_register_clock(cprman, &bcm2835_clock_vpu_data);
clks[BCM2835_CLOCK_V3D] =
bcm2835_register_clock(cprman, &bcm2835_clock_v3d_data);
clks[BCM2835_CLOCK_ISP] =
bcm2835_register_clock(cprman, &bcm2835_clock_isp_data);
clks[BCM2835_CLOCK_H264] =
bcm2835_register_clock(cprman, &bcm2835_clock_h264_data);
clks[BCM2835_CLOCK_V3D] =
bcm2835_register_clock(cprman, &bcm2835_clock_v3d_data);
clks[BCM2835_CLOCK_SDRAM] =
bcm2835_register_clock(cprman, &bcm2835_clock_sdram_data);
clks[BCM2835_CLOCK_UART] =
bcm2835_register_clock(cprman, &bcm2835_clock_uart_data);
clks[BCM2835_CLOCK_VEC] =
bcm2835_register_clock(cprman, &bcm2835_clock_vec_data);
clks[BCM2835_CLOCK_HSM] =
bcm2835_register_clock(cprman, &bcm2835_clock_hsm_data);
clks[BCM2835_CLOCK_EMMC] =
bcm2835_register_clock(cprman, &bcm2835_clock_emmc_data);
/*
* CM_PERIICTL (and CM_PERIACTL, CM_SYSCTL and CM_VPUCTL if
* you have the debug bit set in the power manager, which we
* don't bother exposing) are individual gates off of the
* non-stop vpu clock.
*/
clks[BCM2835_CLOCK_PERI_IMAGE] =
clk_register_gate(dev, "peri_image", "vpu",
CLK_IGNORE_UNUSED | CLK_SET_RATE_GATE,
cprman->regs + CM_PERIICTL, CM_GATE_BIT,
0, &cprman->regs_lock);
clks[BCM2835_CLOCK_PWM] =
bcm2835_register_clock(cprman, &bcm2835_clock_pwm_data);
for (i = 0; i < asize; i++) {
desc = &clk_desc_array[i];
if (desc->clk_register && desc->data)
clks[i] = desc->clk_register(cprman, desc->data);
}
return of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
&cprman->onecell);
......
include/dt-bindings/clock/bcm2835.h
View file @ 5759d6cd
......@@ -44,5 +44,23 @@
#define BCM2835_CLOCK_EMMC 28
#define BCM2835_CLOCK_PERI_IMAGE 29
#define BCM2835_CLOCK_PWM 30
#define BCM2835_CLOCK_PCM 31
#define BCM2835_CLOCK_COUNT 31
#define BCM2835_PLLA_DSI0 32
#define BCM2835_PLLA_CCP2 33
#define BCM2835_PLLD_DSI0 34
#define BCM2835_PLLD_DSI1 35
#define BCM2835_CLOCK_AVEO 36
#define BCM2835_CLOCK_DFT 37
#define BCM2835_CLOCK_GP0 38
#define BCM2835_CLOCK_GP1 39
#define BCM2835_CLOCK_GP2 40
#define BCM2835_CLOCK_SLIM 41
#define BCM2835_CLOCK_SMI 42
#define BCM2835_CLOCK_TEC 43
#define BCM2835_CLOCK_DPI 44
#define BCM2835_CLOCK_CAM0 45
#define BCM2835_CLOCK_CAM1 46
#define BCM2835_CLOCK_DSI0E 47
#define BCM2835_CLOCK_DSI1E 48
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