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clk: bcm2835: Migrate to clk_hw based registration and OF APIs 

Now that we have clk_hw based provider APIs to register clks, we
can get rid of struct clk pointers while registering clks in
these drivers, allowing us to move closer to a clear split of
consumer and provider clk APIs.

Cc: Eric Anholt <eric@anholt.net>
Cc: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Stephen Boyd <stephen.boyd@linaro.org>
This commit is contained in:
Stephen Boyd 2016-06-01 16:15:03 -07:00 committed by Stephen Boyd
parent f4e8715099
commit b19f009d45
2 changed files with 58 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/clk/bcm/clk-bcm2835-aux.c
View File

@ -25,7 +25,7 @@
static int bcm2835_aux_clk_probe(struct platform_device *pdev) static int bcm2835_aux_clk_probe(struct platform_device *pdev)
{ {
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
struct clk_onecell_data *onecell; struct clk_hw_onecell_data *onecell;
const char *parent; const char *parent;
struct clk *parent_clk; struct clk *parent_clk;
struct resource *res; struct resource *res;
@ -41,28 +41,24 @@ static int bcm2835_aux_clk_probe(struct platform_device *pdev)
if (IS_ERR(reg)) if (IS_ERR(reg))
return PTR_ERR(reg); return PTR_ERR(reg);
onecell = devm_kmalloc(dev, sizeof(*onecell), GFP_KERNEL); onecell = devm_kmalloc(dev, sizeof(*onecell) + sizeof(*onecell->hws) *
BCM2835_AUX_CLOCK_COUNT, GFP_KERNEL);
if (!onecell) if (!onecell)
return -ENOMEM; return -ENOMEM;
onecell->clk_num = BCM2835_AUX_CLOCK_COUNT; onecell->num = BCM2835_AUX_CLOCK_COUNT;
onecell->clks = devm_kcalloc(dev, BCM2835_AUX_CLOCK_COUNT,
sizeof(*onecell->clks), GFP_KERNEL);
if (!onecell->clks)
return -ENOMEM;
gate = reg + BCM2835_AUXENB; gate = reg + BCM2835_AUXENB;
onecell->clks[BCM2835_AUX_CLOCK_UART] = onecell->hws[BCM2835_AUX_CLOCK_UART] =
clk_register_gate(dev, "aux_uart", parent, 0, gate, 0, 0, NULL); clk_hw_register_gate(dev, "aux_uart", parent, 0, gate, 0, 0, NULL);
onecell->clks[BCM2835_AUX_CLOCK_SPI1] = onecell->hws[BCM2835_AUX_CLOCK_SPI1] =
clk_register_gate(dev, "aux_spi1", parent, 0, gate, 1, 0, NULL); clk_hw_register_gate(dev, "aux_spi1", parent, 0, gate, 1, 0, NULL);
onecell->clks[BCM2835_AUX_CLOCK_SPI2] = onecell->hws[BCM2835_AUX_CLOCK_SPI2] =
clk_register_gate(dev, "aux_spi2", parent, 0, gate, 2, 0, NULL); clk_hw_register_gate(dev, "aux_spi2", parent, 0, gate, 2, 0, NULL);
of_clk_add_provider(pdev->dev.of_node, of_clk_src_onecell_get, onecell); return of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,
onecell);
return 0;
} }
static const struct of_device_id bcm2835_aux_clk_of_match[] = { static const struct of_device_id bcm2835_aux_clk_of_match[] = {

85
drivers/clk/bcm/clk-bcm2835.c
View File

@ -303,8 +303,8 @@ struct bcm2835_cprman {
spinlock_t regs_lock; /* spinlock for all clocks */ spinlock_t regs_lock; /* spinlock for all clocks */
const char *osc_name; const char *osc_name;
struct clk_onecell_data onecell; /* Must be last */
struct clk *clks[]; struct clk_hw_onecell_data onecell;
}; };
static inline void cprman_write(struct bcm2835_cprman *cprman, u32 reg, u32 val) static inline void cprman_write(struct bcm2835_cprman *cprman, u32 reg, u32 val)
@ -345,24 +345,24 @@ static int bcm2835_debugfs_regset(struct bcm2835_cprman *cprman, u32 base,
*/ */
void __init bcm2835_init_clocks(void) void __init bcm2835_init_clocks(void)
{ {
struct clk *clk; struct clk_hw *hw;
int ret; int ret;
clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 126000000); hw = clk_hw_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 126000000);
if (IS_ERR(clk)) if (IS_ERR(hw))
pr_err("apb_pclk not registered\n"); pr_err("apb_pclk not registered\n");
clk = clk_register_fixed_rate(NULL, "uart0_pclk", NULL, 0, 3000000); hw = clk_hw_register_fixed_rate(NULL, "uart0_pclk", NULL, 0, 3000000);
if (IS_ERR(clk)) if (IS_ERR(hw))
pr_err("uart0_pclk not registered\n"); pr_err("uart0_pclk not registered\n");
ret = clk_register_clkdev(clk, NULL, "20201000.uart"); ret = clk_hw_register_clkdev(hw, NULL, "20201000.uart");
if (ret) if (ret)
pr_err("uart0_pclk alias not registered\n"); pr_err("uart0_pclk alias not registered\n");
clk = clk_register_fixed_rate(NULL, "uart1_pclk", NULL, 0, 125000000); hw = clk_hw_register_fixed_rate(NULL, "uart1_pclk", NULL, 0, 125000000);
if (IS_ERR(clk)) if (IS_ERR(hw))
pr_err("uart1_pclk not registered\n"); pr_err("uart1_pclk not registered\n");
ret = clk_register_clkdev(clk, NULL, "20215000.uart"); ret = clk_hw_register_clkdev(hw, NULL, "20215000.uart");
if (ret) if (ret)
pr_err("uart1_pclk alias not registered\n"); pr_err("uart1_pclk alias not registered\n");
} }
@ -1147,11 +1147,12 @@ static const struct clk_ops bcm2835_vpu_clock_clk_ops = {
.debug_init = bcm2835_clock_debug_init, .debug_init = bcm2835_clock_debug_init,
}; };
static struct clk *bcm2835_register_pll(struct bcm2835_cprman *cprman, static struct clk_hw *bcm2835_register_pll(struct bcm2835_cprman *cprman,
const struct bcm2835_pll_data *data) const struct bcm2835_pll_data *data)
{ {
struct bcm2835_pll *pll; struct bcm2835_pll *pll;
struct clk_init_data init; struct clk_init_data init;
int ret;
memset(&init, 0, sizeof(init)); memset(&init, 0, sizeof(init));
@ -1170,17 +1171,20 @@ static struct clk *bcm2835_register_pll(struct bcm2835_cprman *cprman,
pll->data = data; pll->data = data;
pll->hw.init = &init; pll->hw.init = &init;
return devm_clk_register(cprman->dev, &pll->hw); ret = devm_clk_hw_register(cprman->dev, &pll->hw);
if (ret)
return NULL;
return &pll->hw;
} }
static struct clk * static struct clk_hw *
bcm2835_register_pll_divider(struct bcm2835_cprman *cprman, bcm2835_register_pll_divider(struct bcm2835_cprman *cprman,
const struct bcm2835_pll_divider_data *data) const struct bcm2835_pll_divider_data *data)
{ {
struct bcm2835_pll_divider *divider; struct bcm2835_pll_divider *divider;
struct clk_init_data init; struct clk_init_data init;
struct clk *clk;
const char *divider_name; const char *divider_name;
int ret;
if (data->fixed_divider != 1) { if (data->fixed_divider != 1) {
divider_name = devm_kasprintf(cprman->dev, GFP_KERNEL, divider_name = devm_kasprintf(cprman->dev, GFP_KERNEL,
@ -1214,32 +1218,33 @@ bcm2835_register_pll_divider(struct bcm2835_cprman *cprman,
divider->cprman = cprman; divider->cprman = cprman;
divider->data = data; divider->data = data;
clk = devm_clk_register(cprman->dev, &divider->div.hw); ret = devm_clk_hw_register(cprman->dev, &divider->div.hw);
if (IS_ERR(clk)) if (ret)
return clk; return ERR_PTR(ret);
/* /*
* PLLH's channels have a fixed divide by 10 afterwards, which * PLLH's channels have a fixed divide by 10 afterwards, which
* is what our consumers are actually using. * is what our consumers are actually using.
*/ */
if (data->fixed_divider != 1) { if (data->fixed_divider != 1) {
return clk_register_fixed_factor(cprman->dev, data->name, return clk_hw_register_fixed_factor(cprman->dev, data->name,
divider_name, divider_name,
CLK_SET_RATE_PARENT, CLK_SET_RATE_PARENT,
1, 1,
data->fixed_divider); data->fixed_divider);
} }
return clk; return &divider->div.hw;
} }
static struct clk *bcm2835_register_clock(struct bcm2835_cprman *cprman, static struct clk_hw *bcm2835_register_clock(struct bcm2835_cprman *cprman,
const struct bcm2835_clock_data *data) const struct bcm2835_clock_data *data)
{ {
struct bcm2835_clock *clock; struct bcm2835_clock *clock;
struct clk_init_data init; struct clk_init_data init;
const char *parents[1 << CM_SRC_BITS]; const char *parents[1 << CM_SRC_BITS];
size_t i; size_t i;
int ret;
/* /*
* Replace our "xosc" references with the oscillator's * Replace our "xosc" references with the oscillator's
@ -1279,7 +1284,10 @@ static struct clk *bcm2835_register_clock(struct bcm2835_cprman *cprman,
clock->data = data; clock->data = data;
clock->hw.init = &init; clock->hw.init = &init;
return devm_clk_register(cprman->dev, &clock->hw); ret = devm_clk_hw_register(cprman->dev, &clock->hw);
if (ret)
return ERR_PTR(ret);
return &clock->hw;
} }
static struct clk *bcm2835_register_gate(struct bcm2835_cprman *cprman, static struct clk *bcm2835_register_gate(struct bcm2835_cprman *cprman,
@ -1291,8 +1299,8 @@ static struct clk *bcm2835_register_gate(struct bcm2835_cprman *cprman,
CM_GATE_BIT, 0, &cprman->regs_lock); CM_GATE_BIT, 0, &cprman->regs_lock);
} }
typedef struct clk *(*bcm2835_clk_register)(struct bcm2835_cprman *cprman, typedef struct clk_hw *(*bcm2835_clk_register)(struct bcm2835_cprman *cprman,
const void *data); const void *data);
struct bcm2835_clk_desc { struct bcm2835_clk_desc {
bcm2835_clk_register clk_register; bcm2835_clk_register clk_register;
const void *data; const void *data;
@ -1847,7 +1855,7 @@ static int bcm2835_mark_sdc_parent_critical(struct clk *sdc)
static int bcm2835_clk_probe(struct platform_device *pdev) static int bcm2835_clk_probe(struct platform_device *pdev)
{ {
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
struct clk **clks; struct clk_hw **hws;
struct bcm2835_cprman *cprman; struct bcm2835_cprman *cprman;
struct resource *res; struct resource *res;
const struct bcm2835_clk_desc *desc; const struct bcm2835_clk_desc *desc;
@ -1855,8 +1863,8 @@ static int bcm2835_clk_probe(struct platform_device *pdev)
size_t i; size_t i;
int ret; int ret;
cprman = devm_kzalloc(dev, cprman = devm_kzalloc(dev, sizeof(*cprman) +
sizeof(*cprman) + asize * sizeof(*clks), sizeof(*cprman->onecell.hws) * asize,
GFP_KERNEL); GFP_KERNEL);
if (!cprman) if (!cprman)
return -ENOMEM; return -ENOMEM;
@ -1874,22 +1882,21 @@ static int bcm2835_clk_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, cprman); platform_set_drvdata(pdev, cprman);
cprman->onecell.clk_num = asize; cprman->onecell.num = asize;
cprman->onecell.clks = cprman->clks; hws = cprman->onecell.hws;
clks = cprman->clks;
for (i = 0; i < asize; i++) { for (i = 0; i < asize; i++) {
desc = &clk_desc_array[i]; desc = &clk_desc_array[i];
if (desc->clk_register && desc->data) if (desc->clk_register && desc->data)
clks[i] = desc->clk_register(cprman, desc->data); hws[i] = desc->clk_register(cprman, desc->data);
} }
ret = bcm2835_mark_sdc_parent_critical(clks[BCM2835_CLOCK_SDRAM]); ret = bcm2835_mark_sdc_parent_critical(hws[BCM2835_CLOCK_SDRAM]->clk);
if (ret) if (ret)
return ret; return ret;
return of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
&cprman->onecell); &cprman->onecell);
} }
static const struct of_device_id bcm2835_clk_of_match[] = { static const struct of_device_id bcm2835_clk_of_match[] = {