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Date: Tue, 22 Jul 2014 14:20:34 +1200
From: Charles Manning <cdhmanning@...il.com>
To: linux-kernel@...r.kernel.org, s.trumtrar@...gutronix.de,
dinguyen@...era.com, cslee@...era.com
Cc: Charles Manning <cdhmanning@...il.com>
Subject: [PATCH 3/3] clk: socfpga Change name look-up to not use the init pointer
The init pointer is not valid after clk_register so we store
the names with the socfpga clock structures so we can look them up.
Signed-off-by: Charles Manning <cdhmanning@...il.com>
---
drivers/clk/socfpga/clk-gate.c | 44 ++++++++++++++++++++++++++--------------
drivers/clk/socfpga/clk-periph.c | 16 ++++++++++-----
drivers/clk/socfpga/clk-pll.c | 13 ++++++++----
drivers/clk/socfpga/clk.h | 7 ++++---
4 files changed, 53 insertions(+), 27 deletions(-)
diff --git a/drivers/clk/socfpga/clk-gate.c b/drivers/clk/socfpga/clk-gate.c
index dd3a78c..a319f01 100644
--- a/drivers/clk/socfpga/clk-gate.c
+++ b/drivers/clk/socfpga/clk-gate.c
@@ -34,7 +34,10 @@
#define streq(a, b) (strcmp((a), (b)) == 0)
-#define to_socfpga_gate_clk(p) container_of(p, struct socfpga_gate_clk, hw.hw)
+#define to_socfpga_gate_clk(p) \
+ container_of(p, struct socfpga_gate_clk, base.hw.hw)
+#define to_socfpga_base_clk(p) \
+ container_of(p, struct socfpga_base_clk, hw.hw)
/* SDMMC Group for System Manager defines */
#define SYSMGR_SDMMCGRP_CTRL_OFFSET 0x108
@@ -45,21 +48,24 @@ static u8 socfpga_clk_get_parent(struct clk_hw *hwclk)
{
u32 l4_src;
u32 perpll_src;
+ struct socfpga_base_clk *base_clk;
- if (streq(hwclk->init->name, SOCFPGA_L4_MP_CLK)) {
+ base_clk = to_socfpga_base_clk(hwclk);
+
+ if (streq(base_clk->name, SOCFPGA_L4_MP_CLK)) {
l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
return l4_src &= 0x1;
}
- if (streq(hwclk->init->name, SOCFPGA_L4_SP_CLK)) {
+ if (streq(base_clk->name, SOCFPGA_L4_SP_CLK)) {
l4_src = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
return !!(l4_src & 2);
}
perpll_src = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
- if (streq(hwclk->init->name, SOCFPGA_MMC_CLK))
+ if (streq(base_clk->name, SOCFPGA_MMC_CLK))
return perpll_src &= 0x3;
- if (streq(hwclk->init->name, SOCFPGA_NAND_CLK) ||
- streq(hwclk->init->name, SOCFPGA_NAND_X_CLK))
+ if (streq(base_clk->name, SOCFPGA_NAND_CLK) ||
+ streq(base_clk->name, SOCFPGA_NAND_X_CLK))
return (perpll_src >> 2) & 3;
/* QSPI clock */
@@ -70,24 +76,27 @@ static u8 socfpga_clk_get_parent(struct clk_hw *hwclk)
static int socfpga_clk_set_parent(struct clk_hw *hwclk, u8 parent)
{
u32 src_reg;
+ struct socfpga_base_clk *base_clk;
+
+ base_clk = to_socfpga_base_clk(hwclk);
- if (streq(hwclk->init->name, SOCFPGA_L4_MP_CLK)) {
+ if (streq(base_clk->name, SOCFPGA_L4_MP_CLK)) {
src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
src_reg &= ~0x1;
src_reg |= parent;
writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC);
- } else if (streq(hwclk->init->name, SOCFPGA_L4_SP_CLK)) {
+ } else if (streq(base_clk->name, SOCFPGA_L4_SP_CLK)) {
src_reg = readl(clk_mgr_base_addr + CLKMGR_L4SRC);
src_reg &= ~0x2;
src_reg |= (parent << 1);
writel(src_reg, clk_mgr_base_addr + CLKMGR_L4SRC);
} else {
src_reg = readl(clk_mgr_base_addr + CLKMGR_PERPLL_SRC);
- if (streq(hwclk->init->name, SOCFPGA_MMC_CLK)) {
+ if (streq(base_clk->name, SOCFPGA_MMC_CLK)) {
src_reg &= ~0x3;
src_reg |= parent;
- } else if (streq(hwclk->init->name, SOCFPGA_NAND_CLK) ||
- streq(hwclk->init->name, SOCFPGA_NAND_X_CLK)) {
+ } else if (streq(base_clk->name, SOCFPGA_NAND_CLK) ||
+ streq(base_clk->name, SOCFPGA_NAND_X_CLK)) {
src_reg &= ~0xC;
src_reg |= (parent << 2);
} else {/* QSPI clock */
@@ -205,8 +214,8 @@ static void __init __socfpga_gate_init(struct device_node *node,
clk_gate[0] = 0;
if (clk_gate[0]) {
- socfpga_clk->hw.reg = clk_mgr_base_addr + clk_gate[0];
- socfpga_clk->hw.bit_idx = clk_gate[1];
+ socfpga_clk->base.hw.reg = clk_mgr_base_addr + clk_gate[0];
+ socfpga_clk->base.hw.bit_idx = clk_gate[1];
gateclk_ops.enable = clk_gate_ops.enable;
gateclk_ops.disable = clk_gate_ops.disable;
@@ -244,9 +253,14 @@ static void __init __socfpga_gate_init(struct device_node *node,
init.parent_names = parent_name;
init.num_parents = i;
- socfpga_clk->hw.hw.init = &init;
+ socfpga_clk->base.hw.hw.init = &init;
+ socfpga_clk->base.name = kstrdup(clk_name, GFP_KERNEL);
+ if (WARN_ON(!socfpga_clk->base.name)) {
+ kfree(socfpga_clk);
+ return;
+ }
- clk = clk_register(NULL, &socfpga_clk->hw.hw);
+ clk = clk_register(NULL, &socfpga_clk->base.hw.hw);
if (WARN_ON(IS_ERR(clk))) {
kfree(socfpga_clk);
return;
diff --git a/drivers/clk/socfpga/clk-periph.c b/drivers/clk/socfpga/clk-periph.c
index 46531c3..df2fd2c 100644
--- a/drivers/clk/socfpga/clk-periph.c
+++ b/drivers/clk/socfpga/clk-periph.c
@@ -23,7 +23,8 @@
#include "clk.h"
-#define to_socfpga_periph_clk(p) container_of(p, struct socfpga_periph_clk, hw.hw)
+#define to_socfpga_periph_clk(p) \
+ container_of(p, struct socfpga_periph_clk, base.hw.hw)
static unsigned long clk_periclk_recalc_rate(struct clk_hw *hwclk,
unsigned long parent_rate)
@@ -39,7 +40,7 @@ static unsigned long clk_periclk_recalc_rate(struct clk_hw *hwclk,
val &= div_mask(socfpgaclk->width);
parent_rate /= (val + 1);
}
- div = ((readl(socfpgaclk->hw.reg) & 0x1ff) + 1);
+ div = ((readl(socfpgaclk->base.hw.reg) & 0x1ff) + 1);
}
return parent_rate / div;
@@ -68,7 +69,7 @@ static __init void __socfpga_periph_init(struct device_node *node,
if (WARN_ON(!periph_clk))
return;
- periph_clk->hw.reg = clk_mgr_base_addr + reg;
+ periph_clk->base.hw.reg = clk_mgr_base_addr + reg;
rc = of_property_read_u32_array(node, "div-reg", div_reg, 3);
if (!rc) {
@@ -94,9 +95,14 @@ static __init void __socfpga_periph_init(struct device_node *node,
init.parent_names = &parent_name;
init.num_parents = 1;
- periph_clk->hw.hw.init = &init;
+ periph_clk->base.hw.hw.init = &init;
+ periph_clk->base.name = kstrdup(clk_name, GFP_KERNEL);
+ if (WARN_ON(!periph_clk->base.name)) {
+ kfree(periph_clk);
+ return;
+ }
- clk = clk_register(NULL, &periph_clk->hw.hw);
+ clk = clk_register(NULL, &periph_clk->base.hw.hw);
if (WARN_ON(IS_ERR(clk))) {
kfree(periph_clk);
return;
diff --git a/drivers/clk/socfpga/clk-pll.c b/drivers/clk/socfpga/clk-pll.c
index de6da95..d48f637 100644
--- a/drivers/clk/socfpga/clk-pll.c
+++ b/drivers/clk/socfpga/clk-pll.c
@@ -42,14 +42,14 @@
#define CLK_MGR_PLL_CLK_SRC_SHIFT 22
#define CLK_MGR_PLL_CLK_SRC_MASK 0x3
-#define to_socfpga_clk(p) container_of(p, struct socfpga_pll, hw.hw)
+#define to_socfpga_clk(p) container_of(p, struct socfpga_base_clk, hw.hw)
void __iomem *clk_mgr_base_addr;
static unsigned long clk_pll_recalc_rate(struct clk_hw *hwclk,
unsigned long parent_rate)
{
- struct socfpga_pll *socfpgaclk = to_socfpga_clk(hwclk);
+ struct socfpga_base_clk *socfpgaclk = to_socfpga_clk(hwclk);
unsigned long divf, divq, reg;
unsigned long long vco_freq;
unsigned long bypass;
@@ -69,7 +69,7 @@ static unsigned long clk_pll_recalc_rate(struct clk_hw *hwclk,
static u8 clk_pll_get_parent(struct clk_hw *hwclk)
{
u32 pll_src;
- struct socfpga_pll *socfpgaclk = to_socfpga_clk(hwclk);
+ struct socfpga_base_clk *socfpgaclk = to_socfpga_clk(hwclk);
pll_src = readl(socfpgaclk->hw.reg);
return (pll_src >> CLK_MGR_PLL_CLK_SRC_SHIFT) &
@@ -86,7 +86,7 @@ static __init struct clk *__socfpga_pll_init(struct device_node *node,
{
u32 reg;
struct clk *clk;
- struct socfpga_pll *pll_clk;
+ struct socfpga_base_clk *pll_clk;
const char *clk_name = node->name;
const char *parent_name[SOCFPGA_MAX_PARENTS];
struct clk_init_data init;
@@ -118,6 +118,11 @@ static __init struct clk *__socfpga_pll_init(struct device_node *node,
init.num_parents = i;
init.parent_names = parent_name;
pll_clk->hw.hw.init = &init;
+ pll_clk->name = kstrdup(clk_name, GFP_KERNEL);
+ if (WARN_ON(!pll_clk->name)) {
+ kfree(pll_clk);
+ return NULL;
+ }
pll_clk->hw.bit_idx = SOCFPGA_PLL_EXT_ENA;
clk_pll_ops.enable = clk_gate_ops.enable;
diff --git a/drivers/clk/socfpga/clk.h b/drivers/clk/socfpga/clk.h
index d291f60..c2d058c 100644
--- a/drivers/clk/socfpga/clk.h
+++ b/drivers/clk/socfpga/clk.h
@@ -35,12 +35,13 @@ void __init socfpga_pll_init(struct device_node *node);
void __init socfpga_periph_init(struct device_node *node);
void __init socfpga_gate_init(struct device_node *node);
-struct socfpga_pll {
+struct socfpga_base_clk {
+ const char *name;
struct clk_gate hw;
};
struct socfpga_gate_clk {
- struct clk_gate hw;
+ struct socfpga_base_clk base;
char *parent_name;
u32 fixed_div;
void __iomem *div_reg;
@@ -50,7 +51,7 @@ struct socfpga_gate_clk {
};
struct socfpga_periph_clk {
- struct clk_gate hw;
+ struct socfpga_base_clk base;
char *parent_name;
u32 fixed_div;
void __iomem *div_reg;
--
1.9.1
--
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